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#! /bin/sh
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# SPDX-License-Identifier: GPL-3.0-only
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# vim: set ts=4 sw=4 sts=4 noet:
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#
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# Spectre & Meltdown checker
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#
# Check for the latest version at:
# https://github.com/speed47/spectre-meltdown-checker
# git clone https://github.com/speed47/spectre-meltdown-checker.git
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# or wget https://meltdown.ovh -O spectre-meltdown-checker.sh
# or curl -L https://meltdown.ovh -o spectre-meltdown-checker.sh
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#
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# Stephane Lesimple
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#
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VERSION = '0.44+'
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trap 'exit_cleanup' EXIT
trap '_warn "interrupted, cleaning up..."; exit_cleanup; exit 1' INT
exit_cleanup( )
{
# cleanup the temp decompressed config & kernel image
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[ -n " ${ dumped_config :- } " ] && [ -f " $dumped_config " ] && rm -f " $dumped_config "
[ -n " ${ kerneltmp :- } " ] && [ -f " $kerneltmp " ] && rm -f " $kerneltmp "
[ -n " ${ kerneltmp2 :- } " ] && [ -f " $kerneltmp2 " ] && rm -f " $kerneltmp2 "
[ -n " ${ mcedb_tmp :- } " ] && [ -f " $mcedb_tmp " ] && rm -f " $mcedb_tmp "
[ -n " ${ intel_tmp :- } " ] && [ -d " $intel_tmp " ] && rm -rf " $intel_tmp "
[ " ${ mounted_debugfs :- } " = 1 ] && umount /sys/kernel/debug 2>/dev/null
[ " ${ mounted_procfs :- } " = 1 ] && umount " $procfs " 2>/dev/null
[ " ${ insmod_cpuid :- } " = 1 ] && rmmod cpuid 2>/dev/null
[ " ${ insmod_msr :- } " = 1 ] && rmmod msr 2>/dev/null
[ " ${ kldload_cpuctl :- } " = 1 ] && kldunload cpuctl 2>/dev/null
[ " ${ kldload_vmm :- } " = 1 ] && kldunload vmm 2>/dev/null
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}
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# if we were git clone'd, adjust VERSION
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if [ -d " $( dirname " $0 " ) /.git " ] && command -v git >/dev/null 2>& 1; then
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describe = $( git -C " $( dirname " $0 " ) " describe --tags --dirty 2>/dev/null)
[ -n " $describe " ] && VERSION = $( echo " $describe " | sed -e s/^v//)
fi
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show_usage( )
{
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# shellcheck disable=SC2086
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cat <<EOF
Usage:
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Live mode ( auto) : $( basename $0 ) [ options]
Live mode ( manual) : $( basename $0 ) [ options] <[ --kernel <kimage>] [ --config <kconfig>] [ --map <mapfile>] > --live
Offline mode: $( basename $0 ) [ options] <[ --kernel <kimage>] [ --config <kconfig>] [ --map <mapfile>] >
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Modes:
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Two modes are available.
First mode is the "live" mode ( default) , it does its best to find information about the currently running kernel.
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To run under this mode, just start the script without any option ( you can also use --live explicitly)
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Second mode is the "offline" mode, where you can inspect a non-running kernel.
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This mode is automatically enabled when you specify the location of the kernel file, config and System.map files:
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--kernel kernel_file specify a ( possibly compressed) Linux or BSD kernel file
--config kernel_config specify a kernel config file ( Linux only)
--map kernel_map_file specify a kernel System.map file ( Linux only)
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If you want to use live mode while specifying the location of the kernel, config or map file yourself,
you can add --live to the above options, to tell the script to run in live mode instead of the offline mode,
which is enabled by default when at least one file is specified on the command line.
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Options:
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--no-color don' t use color codes
--verbose, -v increase verbosity level, possibly several times
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--explain produce an additional human-readable explanation of actions to take to mitigate a vulnerability
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--paranoid require IBPB to deem Variant 2 as mitigated
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also require SMT disabled + unconditional L1D flush to deem Foreshadow-NG VMM as mitigated
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also require SMT disabled to deem MDS vulnerabilities mitigated
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--no-sysfs don' t use the /sys interface even if present [ Linux]
--sysfs-only only use the /sys interface, don' t run our own checks [ Linux]
--coreos special mode for CoreOS ( use an ephemeral toolbox to inspect kernel) [ Linux]
--arch-prefix PREFIX specify a prefix for cross-inspecting a kernel of a different arch, for example "aarch64-linux-gnu-" ,
so that invoked tools will be prefixed with this ( i.e. aarch64-linux-gnu-objdump)
--batch text produce machine readable output, this is the default if --batch is specified alone
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--batch short produce only one line with the vulnerabilities separated by spaces
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--batch json produce JSON output formatted for Puppet, Ansible, Chef...
--batch nrpe produce machine readable output formatted for NRPE
--batch prometheus produce output for consumption by prometheus-node-exporter
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--variant VARIANT specify which variant you' d like to check, by default all variants are checked
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VARIANT can be one of 1, 2, 3, 3a, 4, l1tf, msbds, mfbds, mlpds, mdsum, taa, mcepsc, srbds
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can be specified multiple times ( e.g. --variant 2 --variant 3)
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--cve [ cve1,cve2,...] specify which CVE you' d like to check, by default all supported CVEs are checked
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--hw-only only check for CPU information, don' t check for any variant
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--no-hw skip CPU information and checks, if you' re inspecting a kernel not to be run on this host
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--vmm [ auto,yes,no] override the detection of the presence of a hypervisor, default: auto
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--cpu [ #,all] interact with CPUID and MSR of CPU core number #, or all (default: CPU core 0)
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--update-fwdb update our local copy of the CPU microcodes versions database ( using the awesome
MCExtractor project and the Intel firmwares GitHub repository)
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--update-builtin-fwdb same as --update-fwdb but update builtin DB inside the script itself
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--dump-mock-data used to mimick a CPU on an other system, mainly used to help debugging this script
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Return codes:
0 ( not vulnerable) , 2 ( vulnerable) , 3 ( unknown) , 255 ( error)
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IMPORTANT:
A false sense of security is worse than no security at all.
Please use the --disclaimer option to understand exactly what this script does.
EOF
}
show_disclaimer( )
{
cat <<EOF
Disclaimer:
This tool does its best to determine whether your system is immune ( or has proper mitigations in place) for the
collectively named "speculative execution" vulnerabilities. It doesn't attempt to run any kind of exploit, and can' t guarantee
that your system is secure, but rather helps you verifying whether your system has the known correct mitigations in place.
However, some mitigations could also exist in your kernel that this script doesn' t know ( yet) how to detect, or it might
falsely detect mitigations that in the end don' t work as expected ( for example, on backported or modified kernels) .
Your system exposure also depends on your CPU. As of now, AMD and ARM processors are marked as immune to some or all of these
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vulnerabilities ( except some specific ARM models) . All Intel processors manufactured since circa 1995 are thought to be vulnerable,
except some specific/old models, such as some early Atoms. Whatever processor one uses, one might seek more information
from the manufacturer of that processor and/or of the device in which it runs.
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The nature of the discovered vulnerabilities being quite new, the landscape of vulnerable processors can be expected
to change over time, which is why this script makes the assumption that all CPUs are vulnerable, except if the manufacturer
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explicitly stated otherwise in a verifiable public announcement.
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Please also note that for Spectre vulnerabilities, all software can possibly be exploited, this tool only verifies that the
kernel ( which is the core of the system) you' re using has the proper protections in place. Verifying all the other software
is out of the scope of this tool. As a general measure, ensure you always have the most up to date stable versions of all
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the software you use, especially for those who are exposed to the world, such as network daemons and browsers.
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This tool has been released in the hope that it'll be useful, but don' t use it to jump to conclusions about your security.
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EOF
}
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os = $( uname -s)
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# parse options
opt_kernel = ''
opt_config = ''
opt_map = ''
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opt_live = -1
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opt_no_color = 0
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opt_batch = 0
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opt_batch_format = 'text'
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opt_verbose = 1
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opt_cve_list = ''
opt_cve_all = 1
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opt_no_sysfs = 0
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opt_sysfs_only = 0
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opt_coreos = 0
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opt_arch_prefix = ''
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opt_hw_only = 0
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opt_no_hw = 0
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opt_vmm = -1
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opt_cpu = 0
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opt_explain = 0
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opt_paranoid = 0
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opt_mock = 0
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global_critical = 0
global_unknown = 0
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nrpe_vuln = ''
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supported_cve_list = 'CVE-2017-5753 CVE-2017-5715 CVE-2017-5754 CVE-2018-3640 CVE-2018-3639 CVE-2018-3615 CVE-2018-3620 CVE-2018-3646 CVE-2018-12126 CVE-2018-12130 CVE-2018-12127 CVE-2019-11091 CVE-2019-11135 CVE-2018-12207 CVE-2020-0543'
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# find a sane command to print colored messages, we prefer `printf` over `echo`
# because `printf` behavior is more standard across Linux/BSD
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# we'll try to avoid using shell builtins that might not take options
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echo_cmd_type = 'echo'
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# ignore SC2230 here because `which` ignores builtins while `command -v` doesn't, and
# we don't want builtins here. Even if `which` is not installed, we'll fallback to the
# `echo` builtin anyway, so this is safe.
# shellcheck disable=SC2230
if command -v printf >/dev/null 2>& 1; then
echo_cmd = $( command -v printf )
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echo_cmd_type = 'printf'
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elif which echo >/dev/null 2>& 1; then
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echo_cmd = $( which echo )
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else
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# maybe the `which` command is broken?
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[ -x /bin/echo ] && echo_cmd = /bin/echo
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# for Android
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[ -x /system/bin/echo ] && echo_cmd = /system/bin/echo
fi
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# still empty? fallback to builtin
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[ -z " $echo_cmd " ] && echo_cmd = 'echo'
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__echo( )
{
opt = " $1 "
shift
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_msg = " $* "
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if [ " $opt_no_color " = 1 ] ; then
# strip ANSI color codes
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# some sed versions (i.e. toybox) can't seem to handle
# \033 aka \x1B correctly, so do it for them.
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if [ " $echo_cmd_type " = printf ] ; then
_interpret_chars = ''
else
_interpret_chars = '-e'
fi
_ctrlchar = $( $echo_cmd $_interpret_chars "\033" )
_msg = $( $echo_cmd $_interpret_chars " $_msg " | sed -r " s/ $_ctrlchar \[([0-9][0-9]?(;[0-9][0-9]?)?)?m//g " )
fi
if [ " $echo_cmd_type " = printf ] ; then
if [ " $opt " = "-n" ] ; then
$echo_cmd " $_msg "
else
$echo_cmd " $_msg \n "
fi
else
# shellcheck disable=SC2086
$echo_cmd $opt -e " $_msg "
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fi
}
_echo( )
{
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if [ " $opt_verbose " -ge " $1 " ] ; then
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shift
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__echo '' " $* "
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fi
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}
_echo_nol( )
{
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if [ " $opt_verbose " -ge " $1 " ] ; then
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shift
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__echo -n " $* "
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fi
}
_warn( )
{
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_echo 0 " \033[31m $* \033[0m " >& 2
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}
_info( )
{
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_echo 1 " $* "
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}
_info_nol( )
{
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_echo_nol 1 " $* "
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}
_verbose( )
{
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_echo 2 " $* "
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}
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_verbose_nol( )
{
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_echo_nol 2 " $* "
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}
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_debug( )
{
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_echo 3 " \033[34m(debug) $* \033[0m "
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}
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explain( )
{
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if [ " $opt_explain " = 1 ] ; then
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_info ''
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_info " > \033[41m\033[30mHow to fix:\033[0m $* "
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fi
}
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cve2name( )
{
case " $1 " in
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CVE-2017-5753) echo "Spectre Variant 1, bounds check bypass" ; ;
CVE-2017-5715) echo "Spectre Variant 2, branch target injection" ; ;
CVE-2017-5754) echo "Variant 3, Meltdown, rogue data cache load" ; ;
CVE-2018-3640) echo "Variant 3a, rogue system register read" ; ;
CVE-2018-3639) echo "Variant 4, speculative store bypass" ; ;
CVE-2018-3615) echo "Foreshadow (SGX), L1 terminal fault" ; ;
CVE-2018-3620) echo "Foreshadow-NG (OS), L1 terminal fault" ; ;
CVE-2018-3646) echo "Foreshadow-NG (VMM), L1 terminal fault" ; ;
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CVE-2018-12126) echo "Fallout, microarchitectural store buffer data sampling (MSBDS)" ; ;
CVE-2018-12130) echo "ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)" ; ;
CVE-2018-12127) echo "RIDL, microarchitectural load port data sampling (MLPDS)" ; ;
CVE-2019-11091) echo "RIDL, microarchitectural data sampling uncacheable memory (MDSUM)" ; ;
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CVE-2019-11135) echo "ZombieLoad V2, TSX Asynchronous Abort (TAA)" ; ;
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CVE-2018-12207) echo "No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)" ; ;
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CVE-2020-0543) echo "Special Register Buffer Data Sampling (SRBDS)" ; ;
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*) echo " $0 : error: invalid CVE ' $1 ' passed to cve2name() " >& 2; exit 255; ;
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esac
}
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is_cpu_vulnerable_cached = 0
_is_cpu_vulnerable_cached( )
{
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# shellcheck disable=SC2086
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case " $1 " in
CVE-2017-5753) return $variant1 ; ;
CVE-2017-5715) return $variant2 ; ;
CVE-2017-5754) return $variant3 ; ;
CVE-2018-3640) return $variant3a ; ;
CVE-2018-3639) return $variant4 ; ;
CVE-2018-3615) return $variantl1tf_sgx ; ;
CVE-2018-3620) return $variantl1tf ; ;
CVE-2018-3646) return $variantl1tf ; ;
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CVE-2018-12126) return $variant_msbds ; ;
CVE-2018-12130) return $variant_mfbds ; ;
CVE-2018-12127) return $variant_mlpds ; ;
CVE-2019-11091) return $variant_mdsum ; ;
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CVE-2019-11135) return $variant_taa ; ;
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CVE-2018-12207) return $variant_itlbmh ; ;
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CVE-2020-0543) return $variant_srbds ; ;
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*) echo " $0 : error: invalid variant ' $1 ' passed to is_cpu_vulnerable() " >& 2; exit 255; ;
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esac
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}
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is_cpu_vulnerable( )
{
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# param: one of the $supported_cve_list items
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# returns 0 if vulnerable, 1 if not vulnerable
# (note that in shell, a return of 0 is success)
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# by default, everything is vulnerable, we work in a "whitelist" logic here.
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# usage: is_cpu_vulnerable CVE-xxxx-yyyy && do something if vulnerable
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if [ " $is_cpu_vulnerable_cached " = 1 ] ; then
_is_cpu_vulnerable_cached " $1 "
return $?
fi
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variant1 = ''
variant2 = ''
variant3 = ''
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variant3a = ''
variant4 = ''
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variantl1tf = ''
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variant_msbds = ''
variant_mfbds = ''
variant_mlpds = ''
variant_mdsum = ''
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variant_taa = ''
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variant_itlbmh = ''
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variant_srbds = ''
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if is_cpu_mds_free; then
[ -z " $variant_msbds " ] && variant_msbds = immune
[ -z " $variant_mfbds " ] && variant_mfbds = immune
[ -z " $variant_mlpds " ] && variant_mlpds = immune
[ -z " $variant_mdsum " ] && variant_mdsum = immune
_debug "is_cpu_vulnerable: cpu not affected by Microarchitectural Data Sampling"
fi
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if is_cpu_taa_free; then
[ -z " $variant_taa " ] && variant_taa = immune
_debug "is_cpu_vulnerable: cpu not affected by TSX Asynhronous Abort"
fi
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if is_cpu_srbds_free; then
[ -z " $variant_srbds " ] && variant_srbds = immune
_debug "is_cpu_vulnerable: cpu not affected by Special Register Buffer Data Sampling"
fi
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if is_cpu_specex_free; then
variant1 = immune
variant2 = immune
variant3 = immune
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variant3a = immune
variant4 = immune
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variantl1tf = immune
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variant_msbds = immune
variant_mfbds = immune
variant_mlpds = immune
variant_mdsum = immune
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variant_taa = immune
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variant_srbds = immune
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elif is_intel; then
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# Intel
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# https://github.com/crozone/SpectrePoC/issues/1 ^F E5200 => spectre 2 not vulnerable
# https://github.com/paboldin/meltdown-exploit/issues/19 ^F E5200 => meltdown vulnerable
# model name : Pentium(R) Dual-Core CPU E5200 @ 2.50GHz
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if echo " $cpu_friendly_name " | grep -qE 'Pentium\(R\) Dual-Core[[:space:]]+CPU[[:space:]]+E[0-9]{4}K?' ; then
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variant1 = vuln
[ -z " $variant2 " ] && variant2 = immune
variant3 = vuln
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fi
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if [ " $capabilities_rdcl_no " = 1 ] ; then
# capability bit for future Intel processor that will explicitly state
# that they're not vulnerable to Meltdown
# this var is set in check_cpu()
2018-08-15 11:59:23 +02:00
[ -z " $variant3 " ] && variant3 = immune
[ -z " $variantl1tf " ] && variantl1tf = immune
_debug "is_cpu_vulnerable: RDCL_NO is set so not vuln to meltdown nor l1tf"
2018-01-24 14:44:16 +01:00
fi
2018-05-22 09:18:30 +02:00
if [ " $capabilities_ssb_no " = 1 ] ; then
# capability bit for future Intel processor that will explicitly state
# that they're not vulnerable to Variant 4
# this var is set in check_cpu()
2018-08-15 11:59:23 +02:00
[ -z " $variant4 " ] && variant4 = immune
2018-05-22 09:18:30 +02:00
_debug "is_cpu_vulnerable: SSB_NO is set so not vuln to variant4"
fi
2018-05-27 15:14:29 +02:00
if is_cpu_ssb_free; then
[ -z " $variant4 " ] && variant4 = immune
_debug "is_cpu_vulnerable: cpu not affected by speculative store bypass so not vuln to variant4"
fi
2019-11-24 20:19:21 +01:00
# variant 3a
2018-08-15 11:59:23 +02:00
if [ " $cpu_family " = 6 ] ; then
if [ " $cpu_model " = " $INTEL_FAM6_XEON_PHI_KNL " ] || [ " $cpu_model " = " $INTEL_FAM6_XEON_PHI_KNM " ] ; then
_debug "is_cpu_vulnerable: xeon phi immune to variant 3a"
[ -z " $variant3a " ] && variant3a = immune
2019-11-24 20:19:21 +01:00
elif [ " $cpu_model " = " $INTEL_FAM6_ATOM_SILVERMONT " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SILVERMONT_MID " ] || \
2019-12-08 15:25:54 +01:00
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SILVERMONT_D " ] ; then
2019-11-24 20:19:21 +01:00
# https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00115.html
# https://github.com/speed47/spectre-meltdown-checker/issues/310
# => silvermont CPUs (aka cherry lake for tablets and brawsell for mobile/desktop) don't seem to be vulnerable
# => goldmont ARE vulnerable
_debug "is_cpu_vulnerable: silvermont immune to variant 3a"
[ -z " $variant3a " ] && variant3a = immune
2018-08-15 11:59:23 +02:00
fi
fi
# L1TF (RDCL_NO already checked above)
if [ " $cpu_family " = 6 ] ; then
2018-12-10 19:33:07 +01:00
if [ " $cpu_model " = " $INTEL_FAM6_ATOM_SALTWELL " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SALTWELL_TABLET " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SALTWELL_MID " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_BONNELL " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_BONNELL_MID " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SILVERMONT " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SILVERMONT_MID " ] || \
2019-11-24 19:25:56 +01:00
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SILVERMONT_D " ] || \
2018-08-15 11:59:23 +02:00
[ " $cpu_model " = " $INTEL_FAM6_ATOM_AIRMONT " ] || \
2018-12-10 19:33:07 +01:00
[ " $cpu_model " = " $INTEL_FAM6_ATOM_AIRMONT_MID " ] || \
2019-11-24 19:25:56 +01:00
[ " $cpu_model " = " $INTEL_FAM6_ATOM_AIRMONT_NP " ] || \
2018-12-10 19:33:07 +01:00
[ " $cpu_model " = " $INTEL_FAM6_ATOM_GOLDMONT " ] || \
2019-11-24 19:25:56 +01:00
[ " $cpu_model " = " $INTEL_FAM6_ATOM_GOLDMONT_D " ] || \
2018-12-10 19:33:07 +01:00
[ " $cpu_model " = " $INTEL_FAM6_ATOM_GOLDMONT_PLUS " ] || \
2019-11-24 19:25:56 +01:00
[ " $cpu_model " = " $INTEL_FAM6_ATOM_TREMONT_D " ] || \
2018-08-15 11:59:23 +02:00
[ " $cpu_model " = " $INTEL_FAM6_XEON_PHI_KNL " ] || \
2018-12-10 19:33:07 +01:00
[ " $cpu_model " = " $INTEL_FAM6_XEON_PHI_KNM " ] ; then
2018-08-15 11:59:23 +02:00
2019-11-24 19:25:56 +01:00
_debug "is_cpu_vulnerable: intel family 6 but model known to be immune to l1tf"
2018-08-15 11:59:23 +02:00
[ -z " $variantl1tf " ] && variantl1tf = immune
else
2019-11-24 19:25:56 +01:00
_debug "is_cpu_vulnerable: intel family 6 is vuln to l1tf"
variantl1tf = vuln
2018-08-15 11:59:23 +02:00
fi
elif [ " $cpu_family " -lt 6 ] ; then
2019-11-24 19:25:56 +01:00
_debug "is_cpu_vulnerable: intel family < 6 is immune to l1tf"
2018-08-15 11:59:23 +02:00
[ -z " $variantl1tf " ] && variantl1tf = immune
fi
2019-01-20 19:32:36 +01:00
elif is_amd || is_hygon; then
2018-01-13 13:35:13 +01:00
# AMD revised their statement about variant2 => vulnerable
# https://www.amd.com/en/corporate/speculative-execution
2018-01-18 18:50:19 +01:00
variant1 = vuln
variant2 = vuln
2018-05-23 20:38:43 +02:00
[ -z " $variant3 " ] && variant3 = immune
# https://www.amd.com/en/corporate/security-updates
# "We have not identified any AMD x86 products susceptible to the Variant 3a vulnerability in our analysis to-date."
[ -z " $variant3a " ] && variant3a = immune
2018-05-27 15:14:29 +02:00
if is_cpu_ssb_free; then
[ -z " $variant4 " ] && variant4 = immune
_debug "is_cpu_vulnerable: cpu not affected by speculative store bypass so not vuln to variant4"
fi
2018-08-15 11:59:23 +02:00
variantl1tf = immune
2018-07-22 19:06:19 +02:00
elif [ " $cpu_vendor " = CAVIUM ] ; then
variant3 = immune
variant3a = immune
2018-08-15 11:59:23 +02:00
variantl1tf = immune
2020-12-30 10:16:40 +01:00
elif [ " $cpu_vendor " = PHYTIUM ] ; then
variant3 = immune
variant3a = immune
variantl1tf = immune
2018-01-31 13:00:58 +01:00
elif [ " $cpu_vendor " = ARM ] ; then
2018-01-09 13:11:48 +01:00
# ARM
# reference: https://developer.arm.com/support/security-update
2018-01-18 18:50:19 +01:00
# some devices (phones or other) have several ARMs and as such different part numbers,
# an example is "bigLITTLE". we shouldn't rely on the first CPU only, so we check the whole list
i = 0
2018-01-31 13:00:58 +01:00
for cpupart in $cpu_part_list
2018-01-18 18:50:19 +01:00
do
i = $(( i + 1 ))
2018-02-02 11:00:23 +01:00
# do NOT quote $cpu_arch_list below
# shellcheck disable=SC2086
cpuarch = $( echo $cpu_arch_list | awk '{ print $' $i ' }' )
2018-01-18 18:50:19 +01:00
_debug " checking cpu $i : < $cpupart > < $cpuarch > "
# some kernels report AArch64 instead of 8
[ " $cpuarch " = "AArch64" ] && cpuarch = 8
2018-01-29 10:29:48 +01:00
if [ -n " $cpupart " ] && [ -n " $cpuarch " ] ; then
2018-01-18 18:50:19 +01:00
# Cortex-R7 and Cortex-R8 are real-time and only used in medical devices or such
# I can't find their CPU part number, but it's probably not that useful anyway
2020-11-09 18:54:01 +01:00
# model R7 R8 A8 A9 A12 A15 A17 A57 A72 A73 A75 A76 Neoverse-N1 A77
# part ? ? c08 c09 c0d c0f c0e d07 d08 d09 d0a d0b d0c d0d
# arch 7? 7? 7 7 7 7 7 8 8 8 8 8 8 8
2018-01-18 18:50:19 +01:00
#
2018-06-16 12:14:39 +02:00
# Whitelist identified non-vulnerable processors, use vulnerability information from
# https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability
2020-11-09 18:54:01 +01:00
# Partnumbers can be found here:
# https://github.com/gcc-mirror/gcc/blob/master/gcc/config/arm/arm-cpus.in
2018-06-16 12:14:39 +02:00
#
# Maintain cumulative check of vulnerabilities -
# if at least one of the cpu is vulnerable, then the system is vulnerable
2018-06-21 23:24:18 +02:00
if [ " $cpuarch " = 7 ] && echo " $cpupart " | grep -q -w -e 0xc08 -e 0xc09 -e 0xc0d -e 0xc0e; then
2018-01-18 18:50:19 +01:00
variant1 = vuln
variant2 = vuln
2018-06-16 12:14:39 +02:00
[ -z " $variant3 " ] && variant3 = immune
[ -z " $variant3a " ] && variant3a = immune
[ -z " $variant4 " ] && variant4 = immune
2018-06-21 23:24:18 +02:00
_debug " checking cpu $i : armv7 A8/A9/A12/A17 non vulnerable to variants 3, 3a & 4 "
elif [ " $cpuarch " = 7 ] && echo " $cpupart " | grep -q -w -e 0xc0f; then
2018-01-18 18:50:19 +01:00
variant1 = vuln
variant2 = vuln
2018-06-16 12:14:39 +02:00
[ -z " $variant3 " ] && variant3 = immune
2018-06-21 23:24:18 +02:00
variant3a = vuln
2018-06-16 12:14:39 +02:00
[ -z " $variant4 " ] && variant4 = immune
2018-08-01 20:40:20 +02:00
_debug " checking cpu $i : armv7 A15 non vulnerable to variants 3 & 4 "
2018-06-21 23:24:18 +02:00
elif [ " $cpuarch " = 8 ] && echo " $cpupart " | grep -q -w -e 0xd07 -e 0xd08; then
2018-06-16 12:14:39 +02:00
variant1 = vuln
variant2 = vuln
2018-06-21 23:24:18 +02:00
[ -z " $variant3 " ] && variant3 = immune
variant3a = vuln
variant4 = vuln
_debug " checking cpu $i : armv8 A57/A72 non vulnerable to variants 3 "
elif [ " $cpuarch " = 8 ] && echo " $cpupart " | grep -q -w -e 0xd09; then
2018-06-16 12:14:39 +02:00
variant1 = vuln
variant2 = vuln
2018-01-18 18:50:19 +01:00
[ -z " $variant3 " ] && variant3 = immune
2018-05-22 09:19:29 +02:00
[ -z " $variant3a " ] && variant3a = immune
variant4 = vuln
2018-06-21 23:24:18 +02:00
_debug " checking cpu $i : armv8 A73 non vulnerable to variants 3 & 3a "
elif [ " $cpuarch " = 8 ] && echo " $cpupart " | grep -q -w -e 0xd0a; then
2018-06-16 12:14:39 +02:00
variant1 = vuln
variant2 = vuln
variant3 = vuln
[ -z " $variant3a " ] && variant3a = immune
variant4 = vuln
2018-06-21 23:24:18 +02:00
_debug " checking cpu $i : armv8 A75 non vulnerable to variant 3a "
2020-11-09 18:54:01 +01:00
elif [ " $cpuarch " = 8 ] && echo " $cpupart " | grep -q -w -e 0xd0b -e 0xd0c -e 0xd0d; then
2018-06-21 23:24:18 +02:00
variant1 = vuln
[ -z " $variant2 " ] && variant2 = immune
[ -z " $variant3 " ] && variant3 = immune
[ -z " $variant3a " ] && variant3a = immune
variant4 = vuln
2020-11-09 18:54:01 +01:00
_debug " checking cpu $i : armv8 A76/A77/NeoverseN1 non vulnerable to variant 2, 3 & 3a "
2019-05-05 18:34:09 +02:00
elif [ " $cpuarch " -le 7 ] || { [ " $cpuarch " = 8 ] && [ $(( cpupart )) -lt $(( 0 xd07 )) ] ; } ; then
2018-06-21 23:24:18 +02:00
[ -z " $variant1 " ] && variant1 = immune
[ -z " $variant2 " ] && variant2 = immune
[ -z " $variant3 " ] && variant3 = immune
[ -z " $variant3a " ] && variant3a = immune
[ -z " $variant4 " ] && variant4 = immune
2018-08-01 20:40:20 +02:00
_debug " checking cpu $i : arm arch $cpuarch , all immune (v7 or v8 and model < 0xd07) "
2018-05-22 09:19:29 +02:00
else
2018-06-16 12:14:39 +02:00
variant1 = vuln
variant2 = vuln
variant3 = vuln
variant3a = vuln
variant4 = vuln
2018-06-21 23:24:18 +02:00
_debug " checking cpu $i : arm unknown arch $cpuarch part $cpupart , considering vuln "
2018-05-21 22:01:27 +02:00
fi
2018-01-09 13:11:48 +01:00
fi
2018-05-21 22:01:27 +02:00
_debug " is_cpu_vulnerable: for cpu $i and so far, we have < $variant1 > < $variant2 > < $variant3 > < $variant3a > < $variant4 > "
2018-01-18 18:50:19 +01:00
done
2018-08-15 11:59:23 +02:00
variantl1tf = immune
fi
2019-11-25 23:03:04 +01:00
# we handle iTLB Multihit here (not linked to is_specex_free)
if is_intel; then
# commit f9aa6b73a407b714c9aac44734eb4045c893c6f7
if [ " $cpu_family " = 6 ] ; then
if [ " $cpu_model " = " $INTEL_FAM6_ATOM_SALTWELL " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SALTWELL_TABLET " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SALTWELL_MID " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_BONNELL " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_BONNELL_MID " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SILVERMONT " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SILVERMONT_D " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SILVERMONT_MID " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_AIRMONT " ] || \
[ " $cpu_model " = " $INTEL_FAM6_XEON_PHI_KNL " ] || \
[ " $cpu_model " = " $INTEL_FAM6_XEON_PHI_KNM " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_AIRMONT_MID " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_GOLDMONT " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_GOLDMONT_D " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_GOLDMONT_PLUS " ] ; then
_debug "is_cpu_vulnerable: intel family 6 but model known to be immune to itlbmh"
[ -z " $variant_itlbmh " ] && variant_itlbmh = immune
else
_debug "is_cpu_vulnerable: intel family 6 is vuln to itlbmh"
variant_itlbmh = vuln
fi
elif [ " $cpu_family " -lt 6 ] ; then
_debug "is_cpu_vulnerable: intel family < 6 is immune to itlbmh"
[ -z " $variant_itlbmh " ] && variant_itlbmh = immune
fi
else
_debug "is_cpu_vulnerable: non-intel not vulnerable to itlbmh"
[ -z " $variant_itlbmh " ] && variant_itlbmh = immune
fi
2018-08-15 11:59:23 +02:00
_debug " is_cpu_vulnerable: temp results are < $variant1 > < $variant2 > < $variant3 > < $variant3a > < $variant4 > < $variantl1tf > "
2019-11-24 19:25:56 +01:00
[ " $variant1 " = "immune" ] && variant1 = 1 || variant1 = 0
[ " $variant2 " = "immune" ] && variant2 = 1 || variant2 = 0
[ " $variant3 " = "immune" ] && variant3 = 1 || variant3 = 0
[ " $variant3a " = "immune" ] && variant3a = 1 || variant3a = 0
[ " $variant4 " = "immune" ] && variant4 = 1 || variant4 = 0
[ " $variantl1tf " = "immune" ] && variantl1tf = 1 || variantl1tf = 0
[ " $variant_msbds " = "immune" ] && variant_msbds = 1 || variant_msbds = 0
[ " $variant_mfbds " = "immune" ] && variant_mfbds = 1 || variant_mfbds = 0
[ " $variant_mlpds " = "immune" ] && variant_mlpds = 1 || variant_mlpds = 0
[ " $variant_mdsum " = "immune" ] && variant_mdsum = 1 || variant_mdsum = 0
[ " $variant_taa " = "immune" ] && variant_taa = 1 || variant_taa = 0
[ " $variant_itlbmh " = "immune" ] && variant_itlbmh = 1 || variant_itlbmh = 0
2020-04-16 12:59:28 +02:00
[ " $variant_srbds " = "immune" ] && variant_srbds = 1 || variant_srbds = 0
2018-09-29 11:35:10 +02:00
variantl1tf_sgx = " $variantl1tf "
2020-04-16 12:59:28 +02:00
# even if we are vulnerable to L1TF, if there's no SGX, we're not vulnerable to the original foreshadow
2018-09-17 21:44:22 +02:00
[ " $cpuid_sgx " = 0 ] && variantl1tf_sgx = 1
_debug " is_cpu_vulnerable: final results are < $variant1 > < $variant2 > < $variant3 > < $variant3a > < $variant4 > < $variantl1tf > < $variantl1tf_sgx > "
2018-01-18 21:16:14 +01:00
is_cpu_vulnerable_cached = 1
_is_cpu_vulnerable_cached " $1 "
return $?
2018-01-09 13:11:48 +01:00
}
2018-01-31 14:21:29 +01:00
is_cpu_specex_free( )
{
# return true (0) if the CPU doesn't do speculative execution, false (1) if it does.
# if it's not in the list we know, return false (1).
# source: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/x86/kernel/cpu/common.c#n882
2018-12-10 19:33:07 +01:00
# { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SALTWELL, X86_FEATURE_ANY },
# { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SALTWELL_TABLET, X86_FEATURE_ANY },
# { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_BONNELL_MID, X86_FEATURE_ANY },
# { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SALTWELL_MID, X86_FEATURE_ANY },
# { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_BONNELL, X86_FEATURE_ANY },
2018-01-31 14:21:29 +01:00
# { X86_VENDOR_CENTAUR, 5 },
# { X86_VENDOR_INTEL, 5 },
# { X86_VENDOR_NSC, 5 },
# { X86_VENDOR_ANY, 4 },
2018-12-10 19:33:07 +01:00
2018-02-02 11:10:36 +01:00
parse_cpu_details
2018-04-08 13:02:43 +02:00
if is_intel; then
2018-01-31 14:21:29 +01:00
if [ " $cpu_family " = 6 ] ; then
2018-12-10 19:33:07 +01:00
if [ " $cpu_model " = " $INTEL_FAM6_ATOM_SALTWELL " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SALTWELL_TABLET " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_BONNELL_MID " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SALTWELL_MID " ] || \
[ " $cpu_model " = " $INTEL_FAM6_ATOM_BONNELL " ] ; then
2018-01-31 14:21:29 +01:00
return 0
fi
elif [ " $cpu_family " = 5 ] ; then
return 0
fi
fi
2018-03-10 16:02:44 +01:00
[ " $cpu_family " = 4 ] && return 0
2018-01-31 14:21:29 +01:00
return 1
}
2019-05-14 19:21:20 +02:00
is_cpu_mds_free( )
{
# return true (0) if the CPU isn't affected by microarchitectural data sampling, false (1) if it does.
# if it's not in the list we know, return false (1).
# source: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/x86/kernel/cpu/common.c
#VULNWL_INTEL(ATOM_GOLDMONT, NO_MDS | NO_L1TF),
#VULNWL_INTEL(ATOM_GOLDMONT_X, NO_MDS | NO_L1TF),
#VULNWL_INTEL(ATOM_GOLDMONT_PLUS, NO_MDS | NO_L1TF),
#/* AMD Family 0xf - 0x12 */
#VULNWL_AMD(0x0f, NO_MELTDOWN | NO_SSB | NO_L1TF | NO_MDS),
#VULNWL_AMD(0x10, NO_MELTDOWN | NO_SSB | NO_L1TF | NO_MDS),
#VULNWL_AMD(0x11, NO_MELTDOWN | NO_SSB | NO_L1TF | NO_MDS),
#VULNWL_AMD(0x12, NO_MELTDOWN | NO_SSB | NO_L1TF | NO_MDS),
#/* FAMILY_ANY must be last, otherwise 0x0f - 0x12 matches won't work */
#VULNWL_AMD(X86_FAMILY_ANY, NO_MELTDOWN | NO_L1TF | NO_MDS),
#VULNWL_HYGON(X86_FAMILY_ANY, NO_MELTDOWN | NO_L1TF | NO_MDS),
parse_cpu_details
2019-05-15 20:45:28 +02:00
if is_intel; then
2019-05-14 19:21:20 +02:00
if [ " $cpu_family " = 6 ] ; then
2019-05-15 20:45:28 +02:00
if [ " $cpu_model " = " $INTEL_FAM6_ATOM_GOLDMONT " ] || \
2019-11-24 19:25:56 +01:00
[ " $cpu_model " = " $INTEL_FAM6_ATOM_GOLDMONT_D " ] || \
2019-05-14 19:21:20 +02:00
[ " $cpu_model " = " $INTEL_FAM6_ATOM_GOLDMONT_PLUS " ] ; then
2019-05-15 20:45:28 +02:00
return 0
fi
fi
2019-05-23 14:25:13 +02:00
[ " $capabilities_mds_no " = 1 ] && return 0
2019-05-14 19:21:20 +02:00
fi
2019-05-15 10:56:49 +02:00
2019-05-16 11:31:28 +02:00
# official statement from AMD says none of their CPUs are vulnerable
# https://www.amd.com/en/corporate/product-security
# https://www.amd.com/system/files/documents/security-whitepaper.pdf
2019-05-14 19:21:20 +02:00
if is_amd; then
2019-05-16 11:31:28 +02:00
return 0
elif is_hygon; then
2019-05-14 19:21:20 +02:00
return 0
2019-05-15 10:56:49 +02:00
elif [ " $cpu_vendor " = CAVIUM ] ; then
return 0
2020-12-30 10:16:40 +01:00
elif [ " $cpu_vendor " = PHYTIUM ] ; then
return 0
2019-05-15 10:56:49 +02:00
elif [ " $cpu_vendor " = ARM ] ; then
return 0
2019-05-14 19:21:20 +02:00
fi
2019-05-15 10:56:49 +02:00
2019-05-15 20:45:28 +02:00
return 1
2019-05-14 19:21:20 +02:00
}
2019-11-12 18:30:36 +01:00
is_cpu_taa_free( )
{
2019-11-12 18:34:43 +01:00
# return true (0) if the CPU isn't affected by tsx asynchronous aborts, false (1) if it does.
2019-11-12 18:30:36 +01:00
# There are three types of processors that do not require additional mitigations.
# 1. CPUs that do not support Intel TSX are not affected.
# 2. CPUs that enumerate IA32_ARCH_CAPABILITIES[TAA_NO] (bit 8)=1 are not affected.
# 3. CPUs that support Intel TSX and do not enumerate IA32_ARCH_CAPABILITIES[MDS_NO] (bit 5)=1
# do not need additional mitigations beyond what is already required to mitigate MDS.
if ! is_intel; then
return 0
# is intel
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elif [ " $capabilities_taa_no " = 1 ] || [ " $cpuid_rtm " = 0 ] ; then
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return 0
fi
return 1
}
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is_cpu_srbds_free( )
{
# return zero (0) if the CPU isn't affected by special register buffer data sampling, one (1) if it is.
# If it's not in the list we know, return one (1).
# source: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/x86/kernel/cpu/common.c
#
# A processor is affected by SRBDS if its Family_Model and stepping is in the
2020-06-09 22:43:36 +02:00
# following list, with the exception of the listed processors
# exporting MDS_NO while Intel TSX is available yet not enabled. The
# latter class of processors are only affected when Intel TSX is enabled
# by software using TSX_CTRL_MSR otherwise they are not affected.
2020-04-16 12:59:28 +02:00
#
# ============= ============ ========
# common name Family_Model Stepping
# ============= ============ ========
# IvyBridge 06_3AH All (INTEL_FAM6_IVYBRIDGE)
#
# Haswell 06_3CH All (INTEL_FAM6_HASWELL)
# Haswell_L 06_45H All (INTEL_FAM6_HASWELL_L)
# Haswell_G 06_46H All (INTEL_FAM6_HASWELL_G)
#
# Broadwell_G 06_47H All (INTEL_FAM6_BROADWELL_G)
# Broadwell 06_3DH All (INTEL_FAM6_BROADWELL)
#
# Skylake_L 06_4EH All (INTEL_FAM6_SKYLAKE_L)
# Skylake 06_5EH All (INTEL_FAM6_SKYLAKE)
#
# Kabylake_L 06_8EH <=0xC (MDS_NO) (INTEL_FAM6_KABYLAKE_L)
#
# Kabylake 06_9EH <=0xD (MDS_NO) (INTEL_FAM6_KABYLAKE)
# ============= ============ ========
parse_cpu_details
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if is_intel; then
if [ " $cpu_family " = 6 ] ; then
if [ " $cpu_model " = " $INTEL_FAM6_IVYBRIDGE " ] || \
[ " $cpu_model " = " $INTEL_FAM6_HASWELL " ] || \
[ " $cpu_model " = " $INTEL_FAM6_HASWELL_L " ] || \
[ " $cpu_model " = " $INTEL_FAM6_HASWELL_G " ] || \
[ " $cpu_model " = " $INTEL_FAM6_BROADWELL_G " ] || \
[ " $cpu_model " = " $INTEL_FAM6_BROADWELL " ] || \
[ " $cpu_model " = " $INTEL_FAM6_SKYLAKE_L " ] || \
[ " $cpu_model " = " $INTEL_FAM6_SKYLAKE " ] ; then
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return 1
elif [ " $cpu_model " = " $INTEL_FAM6_KABYLAKE_L " ] && [ " $cpu_stepping " -le 12 ] || \
[ " $cpu_model " = " $INTEL_FAM6_KABYLAKE " ] && [ " $cpu_stepping " -le 13 ] ; then
if [ " $capabilities_mds_no " -eq 1 ] && { [ " $cpuid_rtm " -eq 0 ] || [ " $tsx_ctrl_msr_rtm_disable " -eq 1 ] ; } ; then
return 0
else
return 1
fi
fi
fi
fi
return 0
}
2018-05-27 15:14:29 +02:00
is_cpu_ssb_free( )
{
# return true (0) if the CPU isn't affected by speculative store bypass, false (1) if it does.
# if it's not in the list we know, return false (1).
# source1: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/x86/kernel/cpu/common.c#n945
# source2: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/tree/arch/x86/kernel/cpu/common.c
# Only list CPUs that speculate but are immune, to avoid duplication of cpus listed in is_cpu_specex_free()
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#{ X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT },
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#{ X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_AIRMONT },
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#{ X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT_X },
#{ X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT_MID },
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#{ X86_VENDOR_INTEL, 6, INTEL_FAM6_CORE_YONAH },
#{ X86_VENDOR_INTEL, 6, INTEL_FAM6_XEON_PHI_KNL },
#{ X86_VENDOR_INTEL, 6, INTEL_FAM6_XEON_PHI_KNM },
#{ X86_VENDOR_AMD, 0x12, },
#{ X86_VENDOR_AMD, 0x11, },
#{ X86_VENDOR_AMD, 0x10, },
#{ X86_VENDOR_AMD, 0xf, },
parse_cpu_details
if is_intel; then
if [ " $cpu_family " = 6 ] ; then
if [ " $cpu_model " = " $INTEL_FAM6_ATOM_AIRMONT " ] || \
2018-12-10 19:33:07 +01:00
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SILVERMONT " ] || \
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[ " $cpu_model " = " $INTEL_FAM6_ATOM_SILVERMONT_D " ] || \
2018-12-10 19:33:07 +01:00
[ " $cpu_model " = " $INTEL_FAM6_ATOM_SILVERMONT_MID " ] ; then
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return 0
elif [ " $cpu_model " = " $INTEL_FAM6_CORE_YONAH " ] || \
[ " $cpu_model " = " $INTEL_FAM6_XEON_PHI_KNL " ] || \
[ " $cpu_model " = " $INTEL_FAM6_XEON_PHI_KNM " ] ; then
return 0
fi
fi
fi
if is_amd; then
if [ " $cpu_family " = "18" ] || \
[ " $cpu_family " = "17" ] || \
[ " $cpu_family " = "16" ] || \
[ " $cpu_family " = "15" ] ; then
return 0
fi
2019-01-20 19:32:36 +01:00
fi
if is_hygon; then
return 1
fi
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[ " $cpu_family " = 4 ] && return 0
return 1
}
2018-01-09 13:37:26 +01:00
show_header( )
{
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_info " Spectre and Meltdown mitigation detection tool v $VERSION "
2018-01-09 13:37:26 +01:00
_info
}
2018-01-08 11:31:19 +01:00
2018-09-30 16:56:58 +02:00
[ -z " $HOME " ] && HOME = " $( getent passwd " $( whoami) " | cut -d: -f6) "
mcedb_cache = " $HOME /.mcedb "
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update_fwdb( )
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{
show_header
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set -e
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if [ -r " $mcedb_cache " ] ; then
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previous_dbversion = $( awk '/^# %%% MCEDB / { print $4 }' " $mcedb_cache " )
2018-09-23 17:29:14 +02:00
fi
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# first, download the MCE.db from the excellent platomav's MCExtractor project
2018-09-23 17:29:14 +02:00
mcedb_tmp = " $( mktemp /tmp/mcedb-XXXXXX) "
mcedb_url = 'https://github.com/platomav/MCExtractor/raw/master/MCE.db'
_info_nol "Fetching MCE.db from the MCExtractor project... "
2019-05-05 18:34:09 +02:00
if command -v wget >/dev/null 2>& 1; then
2018-09-23 17:29:14 +02:00
wget -q " $mcedb_url " -O " $mcedb_tmp " ; ret = $?
2019-05-05 18:34:09 +02:00
elif command -v curl >/dev/null 2>& 1; then
2018-09-23 17:29:14 +02:00
curl -sL " $mcedb_url " -o " $mcedb_tmp " ; ret = $?
2019-05-05 18:34:09 +02:00
elif command -v fetch >/dev/null 2>& 1; then
2018-09-23 17:29:14 +02:00
fetch -q " $mcedb_url " -o " $mcedb_tmp " ; ret = $?
else
echo ERROR "please install one of \`wget\`, \`curl\` of \`fetch\` programs"
return 1
fi
if [ " $ret " != 0 ] ; then
echo ERROR " error $ret while downloading MCE.db "
return $ret
fi
echo DONE
2019-11-23 12:39:59 +01:00
# second, get the Intel firmwares from GitHub
intel_tmp = " $( mktemp -d /tmp/intelfw-XXXXXX) "
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intel_url = "https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/archive/main.zip"
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_info_nol "Fetching Intel firmwares... "
## https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files.git
if command -v wget >/dev/null 2>& 1; then
wget -q " $intel_url " -O " $intel_tmp /fw.zip " ; ret = $?
elif command -v curl >/dev/null 2>& 1; then
curl -sL " $intel_url " -o " $intel_tmp /fw.zip " ; ret = $?
elif command -v fetch >/dev/null 2>& 1; then
fetch -q " $intel_url " -o " $intel_tmp /fw.zip " ; ret = $?
else
echo ERROR "please install one of \`wget\`, \`curl\` of \`fetch\` programs"
return 1
fi
if [ " $ret " != 0 ] ; then
echo ERROR " error $ret while downloading Intel firmwares "
return $ret
fi
echo DONE
# now extract MCEdb contents using sqlite
_info_nol "Extracting MCEdb data... "
2019-05-05 18:34:09 +02:00
if ! command -v sqlite3 >/dev/null 2>& 1; then
2018-09-23 17:29:14 +02:00
echo ERROR "please install the \`sqlite3\` program"
return 1
fi
mcedb_revision = $( sqlite3 " $mcedb_tmp " "select revision from MCE" )
if [ -z " $mcedb_revision " ] ; then
echo ERROR "downloaded file seems invalid"
return 1
fi
2020-11-08 21:00:32 +01:00
sqlite3 " $mcedb_tmp " "alter table Intel add column origin text"
sqlite3 " $mcedb_tmp " "update Intel set origin='mce'"
2019-11-23 12:39:59 +01:00
2021-05-24 12:49:25 +02:00
echo OK " MCExtractor database revision $mcedb_revision "
2019-11-23 12:39:59 +01:00
# parse Intel firmwares to get their versions
_info_nol "Integrating Intel firmwares data to db... "
if ! command -v unzip >/dev/null 2>& 1; then
echo ERROR "please install the \`unzip\` program"
return 1
fi
( cd " $intel_tmp " && unzip fw.zip >/dev/null; )
2020-10-05 20:01:01 +02:00
if ! [ -d " $intel_tmp /Intel-Linux-Processor-Microcode-Data-Files-main/intel-ucode " ] ; then
2019-11-23 12:39:59 +01:00
echo ERROR "expected the 'intel-ucode' folder in the downloaded zip file"
return 1
fi
if ! command -v iucode_tool >/dev/null 2>& 1; then
if ! command -v iucode-tool >/dev/null 2>& 1; then
echo ERROR "please install the \`iucode-tool\` program"
return 1
else
iucode_tool = "iucode-tool"
2018-09-23 17:29:14 +02:00
fi
2019-11-23 12:39:59 +01:00
else
iucode_tool = "iucode_tool"
fi
# 079/001: sig 0x000106c2, pf_mask 0x01, 2009-04-10, rev 0x0217, size 5120
# 078/004: sig 0x000106ca, pf_mask 0x10, 2009-08-25, rev 0x0107, size 5120
2020-10-05 20:01:01 +02:00
$iucode_tool -l " $intel_tmp /Intel-Linux-Processor-Microcode-Data-Files-main/intel-ucode " | grep -wF sig | while read -r _line
2019-11-23 12:39:59 +01:00
do
_line = $( echo " $_line " | tr -d ',' )
_cpuid = $( echo " $_line " | awk '{print $3}' )
_cpuid = $(( _cpuid ))
_cpuid = $( printf "0x%08X" " $_cpuid " )
_date = $( echo " $_line " | awk '{print $6}' | tr -d '-' )
_version = $( echo " $_line " | awk '{print $8}' )
_version = $(( _version ))
_version = $( printf "0x%08X" " $_version " )
2020-11-08 21:00:32 +01:00
_sqlstm = " $( printf "INSERT INTO Intel (origin,cpuid,version,yyyymmdd) VALUES (\"%s\",\"%s\",\"%s\",\"%s\");" "intel" " $( printf "%08X" " $_cpuid " ) " " $( printf "%08X" " $_version " ) " " $_date " ) "
2019-11-23 12:39:59 +01:00
sqlite3 " $mcedb_tmp " " $_sqlstm "
done
2020-11-08 21:00:32 +01:00
_intel_timestamp = $( stat -c %Y " $intel_tmp /Intel-Linux-Processor-Microcode-Data-Files-main/license " 2>/dev/null)
if [ -n " $_intel_timestamp " ] ; then
# use this date, it matches the last commit date
_intel_latest_date = $( date +%Y%m%d -d @" $_intel_timestamp " )
else
echo "Falling back to the latest microcode date"
_intel_latest_date = $( sqlite3 " $mcedb_tmp " "SELECT yyyymmdd from Intel WHERE origin = 'intel' ORDER BY yyyymmdd DESC LIMIT 1;" )
fi
2019-11-23 12:39:59 +01:00
echo DONE " (version $_intel_latest_date ) "
2021-05-24 12:49:25 +02:00
dbversion = " $mcedb_revision +i $_intel_latest_date "
2019-11-23 12:39:59 +01:00
if [ " $1 " != builtin ] && [ -n " $previous_dbversion " ] && [ " $previous_dbversion " = " v $dbversion " ] ; then
echo "We already have this version locally, no update needed"
return 0
2018-09-23 17:29:14 +02:00
fi
2019-11-23 12:39:59 +01:00
_info_nol "Building local database... "
{
echo "# Spectre & Meltdown Checker" ;
echo " # %%% MCEDB v $dbversion " ;
sqlite3 " $mcedb_tmp " "SELECT '# I,0x'||t1.cpuid||',0x'||MAX(t1.version)||','||t1.yyyymmdd FROM Intel AS t1 LEFT OUTER JOIN Intel AS t2 ON t2.cpuid=t1.cpuid AND t2.yyyymmdd > t1.yyyymmdd WHERE t2.yyyymmdd IS NULL GROUP BY t1.cpuid ORDER BY t1.cpuid ASC;" | grep -v '^# .,0x00000000,' ;
sqlite3 " $mcedb_tmp " "SELECT '# A,0x'||t1.cpuid||',0x'||MAX(t1.version)||','||t1.yyyymmdd FROM AMD AS t1 LEFT OUTER JOIN AMD AS t2 ON t2.cpuid=t1.cpuid AND t2.yyyymmdd > t1.yyyymmdd WHERE t2.yyyymmdd IS NULL GROUP BY t1.cpuid ORDER BY t1.cpuid ASC;" | grep -v '^# .,0x00000000,' ;
} > " $mcedb_cache "
echo DONE " (version $dbversion ) "
2018-09-30 16:56:58 +02:00
if [ " $1 " = builtin ] ; then
newfile = $( mktemp /tmp/smc-XXXXXX)
awk '/^# %%% MCEDB / { exit }; { print }' " $0 " > " $newfile "
awk '{ if (NR>1) { print } }' " $mcedb_cache " >> " $newfile "
cat " $newfile " > " $0 "
rm -f " $newfile "
fi
2018-09-23 17:29:14 +02:00
}
2018-01-08 20:50:42 +01:00
parse_opt_file( )
{
# parse_opt_file option_name option_value
option_name = " $1 "
option_value = " $2 "
if [ -z " $option_value " ] ; then
2018-01-09 13:37:26 +01:00
show_header
2018-01-08 20:50:42 +01:00
show_usage
echo " $0 : error: -- $option_name expects one parameter (a file) " >& 2
exit 1
elif [ ! -e " $option_value " ] ; then
2018-01-09 13:37:26 +01:00
show_header
2018-01-08 20:50:42 +01:00
echo " $0 : error: couldn't find file $option_value " >& 2
exit 1
elif [ ! -f " $option_value " ] ; then
2018-01-09 13:37:26 +01:00
show_header
2018-01-08 20:50:42 +01:00
echo " $0 : error: $option_value is not a file " >& 2
exit 1
2018-01-10 21:17:14 +01:00
elif [ ! -r " $option_value " ] ; then
2018-01-09 13:37:26 +01:00
show_header
2018-01-08 20:50:42 +01:00
echo " $0 : error: couldn't read $option_value (are you root?) " >& 2
exit 1
fi
echo " $option_value "
exit 0
}
2022-03-20 12:05:33 +01:00
while [ -n " ${ 1 :- } " ] ; do
2018-01-08 20:50:42 +01:00
if [ " $1 " = "--kernel" ] ; then
2018-01-29 10:29:48 +01:00
opt_kernel = $( parse_opt_file kernel " $2 " ) ; ret = $?
[ $ret -ne 0 ] && exit 255
2018-01-08 20:50:42 +01:00
shift 2
elif [ " $1 " = "--config" ] ; then
2018-01-29 10:29:48 +01:00
opt_config = $( parse_opt_file config " $2 " ) ; ret = $?
[ $ret -ne 0 ] && exit 255
2018-01-08 20:50:42 +01:00
shift 2
elif [ " $1 " = "--map" ] ; then
2018-01-29 10:29:48 +01:00
opt_map = $( parse_opt_file map " $2 " ) ; ret = $?
[ $ret -ne 0 ] && exit 255
2018-01-08 20:50:42 +01:00
shift 2
2018-03-17 13:17:10 +01:00
elif [ " $1 " = "--arch-prefix" ] ; then
opt_arch_prefix = " $2 "
shift 2
2018-01-09 10:32:51 +01:00
elif [ " $1 " = "--live" ] ; then
2019-11-17 14:29:32 +01:00
opt_live = 1
2018-01-09 10:32:51 +01:00
shift
elif [ " $1 " = "--no-color" ] ; then
opt_no_color = 1
shift
2018-01-11 12:23:16 +01:00
elif [ " $1 " = "--no-sysfs" ] ; then
opt_no_sysfs = 1
shift
2018-01-21 18:02:11 +01:00
elif [ " $1 " = "--sysfs-only" ] ; then
opt_sysfs_only = 1
shift
2018-01-16 10:33:01 +01:00
elif [ " $1 " = "--coreos" ] ; then
opt_coreos = 1
shift
elif [ " $1 " = "--coreos-within-toolbox" ] ; then
# don't use directly: used internally by --coreos
opt_coreos = 0
shift
2018-04-15 23:05:30 +02:00
elif [ " $1 " = "--paranoid" ] ; then
opt_paranoid = 1
shift
2018-03-25 12:48:37 +02:00
elif [ " $1 " = "--hw-only" ] ; then
opt_hw_only = 1
shift
2018-04-03 19:34:24 +02:00
elif [ " $1 " = "--no-hw" ] ; then
opt_no_hw = 1
shift
2022-03-20 11:04:57 +01:00
elif [ " $1 " = "--cpu" ] ; then
opt_cpu = $2
if [ " $opt_cpu " != all ] ; then
if echo " $opt_cpu " | grep -Eq '^[0-9]+' ; then
opt_cpu = $(( opt_cpu ))
else
echo " $0 : error: --cpu should be an integer or 'all', got ' $opt_cpu ' " >& 2
exit 255
fi
fi
shift 2
2018-04-05 00:03:04 +02:00
elif [ " $1 " = "--no-explain" ] ; then
2018-08-04 16:31:41 +02:00
# deprecated, kept for compatibility
opt_explain = 0
shift
2019-11-23 13:39:51 +01:00
elif [ " $1 " = "--update-fwdb" ] || [ " $1 " = "--update-mcedb" ] ; then
update_fwdb
2018-09-23 17:29:14 +02:00
exit $?
2019-11-23 13:39:51 +01:00
elif [ " $1 " = "--update-builtin-fwdb" ] || [ " $1 " = "--update-builtin-mcedb" ] ; then
update_fwdb builtin
2018-09-30 16:56:58 +02:00
exit $?
2019-05-24 10:15:02 +02:00
elif [ " $1 " = "--dump-mock-data" ] ; then
opt_mock = 1
shift
2018-08-04 16:31:41 +02:00
elif [ " $1 " = "--explain" ] ; then
opt_explain = 1
2018-04-05 00:03:04 +02:00
shift
2018-01-09 13:37:26 +01:00
elif [ " $1 " = "--batch" ] ; then
opt_batch = 1
opt_verbose = 0
2018-08-18 12:04:18 +02:00
opt_no_color = 1
2018-01-09 13:37:26 +01:00
shift
2018-01-10 12:57:45 +01:00
case " $1 " in
2018-09-15 15:45:10 +02:00
text| short| nrpe| json| prometheus) opt_batch_format = " $1 " ; shift; ;
2018-01-10 14:57:10 +01:00
--*) ; ; # allow subsequent flags
'' ) ; ; # allow nothing at all
*)
2018-01-13 20:33:12 +01:00
echo " $0 : error: unknown batch format ' $1 ' " >& 2
echo " $0 : error: --batch expects a format from: text, nrpe, json " >& 2
exit 255
2018-01-10 14:57:10 +01:00
; ;
2018-01-10 12:57:45 +01:00
esac
2018-01-29 10:29:48 +01:00
elif [ " $1 " = "-v" ] || [ " $1 " = "--verbose" ] ; then
opt_verbose = $(( opt_verbose + 1 ))
2019-05-24 11:36:39 +02:00
[ " $opt_verbose " -ge 2 ] && opt_mock = 1
2018-01-09 13:37:26 +01:00
shift
2018-09-17 21:44:22 +02:00
elif [ " $1 " = "--cve" ] ; then
if [ -z " $2 " ] ; then
echo " $0 : error: option --cve expects a parameter, supported CVEs are: $supported_cve_list " >& 2
exit 255
fi
selected_cve = $( echo " $supported_cve_list " | grep -iwo " $2 " )
if [ -n " $selected_cve " ] ; then
opt_cve_list = " $opt_cve_list $selected_cve "
opt_cve_all = 0
else
echo " $0 : error: unsupported CVE specified (' $2 '), supported CVEs are: $supported_cve_list " >& 2
exit 255
fi
shift 2
elif [ " $1 " = "--vmm" ] ; then
if [ -z " $2 " ] ; then
echo " $0 : error: option --vmm (auto, yes, no) " >& 2
exit 255
fi
case " $2 " in
auto) opt_vmm = -1; ;
yes) opt_vmm = 1; ;
no) opt_vmm = 0; ;
2019-05-05 18:15:41 +02:00
*) echo " $0 : error: expected one of (auto, yes, no) to option --vmm instead of ' $2 ' " >& 2; exit 255; ;
2018-09-17 21:44:22 +02:00
esac
shift 2
2018-01-10 12:24:16 +01:00
elif [ " $1 " = "--variant" ] ; then
if [ -z " $2 " ] ; then
2018-08-15 11:59:23 +02:00
echo " $0 : error: option --variant expects a parameter (1, 2, 3, 3a, 4 or l1tf) " >& 2
2018-01-13 20:33:12 +01:00
exit 255
2018-01-10 12:24:16 +01:00
fi
case " $2 " in
2019-05-14 19:21:20 +02:00
1) opt_cve_list = " $opt_cve_list CVE-2017-5753 " ; opt_cve_all = 0; ;
2) opt_cve_list = " $opt_cve_list CVE-2017-5715 " ; opt_cve_all = 0; ;
3) opt_cve_list = " $opt_cve_list CVE-2017-5754 " ; opt_cve_all = 0; ;
3a) opt_cve_list = " $opt_cve_list CVE-2018-3640 " ; opt_cve_all = 0; ;
4) opt_cve_list = " $opt_cve_list CVE-2018-3639 " ; opt_cve_all = 0; ;
msbds) opt_cve_list = " $opt_cve_list CVE-2018-12126 " ; opt_cve_all = 0; ;
mfbds) opt_cve_list = " $opt_cve_list CVE-2018-12130 " ; opt_cve_all = 0; ;
mlpds) opt_cve_list = " $opt_cve_list CVE-2018-12127 " ; opt_cve_all = 0; ;
mdsum) opt_cve_list = " $opt_cve_list CVE-2019-11091 " ; opt_cve_all = 0; ;
l1tf) opt_cve_list = " $opt_cve_list CVE-2018-3615 CVE-2018-3620 CVE-2018-3646 " ; opt_cve_all = 0; ;
2019-11-12 18:30:36 +01:00
taa) opt_cve_list = " $opt_cve_list CVE-2019-11135 " ; opt_cve_all = 0; ;
2019-12-08 15:25:20 +01:00
mcepsc) opt_cve_list = " $opt_cve_list CVE-2018-12207 " ; opt_cve_all = 0; ;
2020-04-16 12:59:28 +02:00
srbds) opt_cve_list = " $opt_cve_list CVE-2020-0543 " ; opt_cve_all = 0; ;
2018-01-10 12:24:16 +01:00
*)
2020-04-16 12:59:28 +02:00
echo " $0 : error: invalid parameter ' $2 ' for --variant, expected either 1, 2, 3, 3a, 4, l1tf, msbds, mfbds, mlpds, mdsum, taa, mcepsc or srbds " >& 2;
2018-01-13 20:33:12 +01:00
exit 255
; ;
2018-01-10 12:24:16 +01:00
esac
shift 2
2018-01-29 10:29:48 +01:00
elif [ " $1 " = "-h" ] || [ " $1 " = "--help" ] ; then
2018-01-09 13:37:26 +01:00
show_header
2018-01-08 20:50:42 +01:00
show_usage
exit 0
2018-01-12 19:10:44 +01:00
elif [ " $1 " = "--version" ] ; then
opt_no_color = 1
show_header
2018-01-13 20:33:12 +01:00
exit 0
2018-01-09 18:52:21 +01:00
elif [ " $1 " = "--disclaimer" ] ; then
show_header
show_disclaimer
exit 0
2018-01-08 20:50:42 +01:00
else
2018-01-09 13:37:26 +01:00
show_header
2018-01-08 20:50:42 +01:00
show_usage
echo " $0 : error: unknown option ' $1 ' "
2018-01-13 20:33:12 +01:00
exit 255
2018-01-08 20:50:42 +01:00
fi
done
2018-01-09 13:37:26 +01:00
show_header
2018-01-29 10:29:48 +01:00
if [ " $opt_no_sysfs " = 1 ] && [ " $opt_sysfs_only " = 1 ] ; then
2018-01-21 18:02:11 +01:00
_warn "Incompatible options specified (--no-sysfs and --sysfs-only), aborting"
exit 255
fi
2018-04-03 19:34:24 +02:00
if [ " $opt_no_hw " = 1 ] && [ " $opt_hw_only " = 1 ] ; then
_warn "Incompatible options specified (--no-hw and --hw-only), aborting"
exit 255
fi
2019-11-17 14:29:32 +01:00
if [ " $opt_live " = -1 ] ; then
if [ -n " $opt_kernel " ] || [ -n " $opt_config " ] || [ -n " $opt_map " ] ; then
# no --live specified and we have a least one of the kernel/config/map files on the cmdline: offline mode
opt_live = 0
else
opt_live = 1
fi
fi
2018-01-09 13:04:49 +01:00
# print status function
2022-03-20 12:05:33 +01:00
# param1: color
# param2: message to print
# param3(optional): supplement message to print between ()
2018-01-09 13:04:49 +01:00
pstatus( )
{
if [ " $opt_no_color " = 1 ] ; then
2018-01-09 13:37:26 +01:00
_info_nol " $2 "
2018-01-09 13:04:49 +01:00
else
case " $1 " in
2022-03-20 12:05:33 +01:00
red) _col = "\033[41m\033[30m" ; ;
green) _col = "\033[42m\033[30m" ; ;
yellow) _col = "\033[43m\033[30m" ; ;
blue) _col = "\033[44m\033[30m" ; ;
*) _col = "" ; ;
2018-01-09 13:04:49 +01:00
esac
2022-03-20 12:05:33 +01:00
_info_nol " $_col $2 \033[0m "
2018-01-09 13:04:49 +01:00
fi
2022-03-20 12:05:33 +01:00
[ -n " ${ 3 :- } " ] && _info_nol " ( $3 ) "
2018-01-09 13:37:26 +01:00
_info
2022-03-20 12:05:33 +01:00
unset _col
2018-01-09 13:04:49 +01:00
}
2018-01-09 13:37:26 +01:00
# Print the final status of a vulnerability (incl. batch mode)
# Arguments are: CVE UNK/OK/VULN description
pvulnstatus( )
{
2018-04-07 18:04:06 +02:00
pvulnstatus_last_cve = " $1 "
2018-01-10 12:57:45 +01:00
if [ " $opt_batch " = 1 ] ; then
2018-02-25 16:51:42 +01:00
case " $1 " in
CVE-2017-5753) aka = "SPECTRE VARIANT 1" ; ;
CVE-2017-5715) aka = "SPECTRE VARIANT 2" ; ;
CVE-2017-5754) aka = "MELTDOWN" ; ;
2018-05-21 22:01:27 +02:00
CVE-2018-3640) aka = "VARIANT 3A" ; ;
CVE-2018-3639) aka = "VARIANT 4" ; ;
2019-05-05 18:15:41 +02:00
CVE-2018-3615) aka = "L1TF SGX" ; ;
CVE-2018-3620) aka = "L1TF OS" ; ;
CVE-2018-3646) aka = "L1TF VMM" ; ;
2019-05-14 19:21:20 +02:00
CVE-2018-12126) aka = "MSBDS" ; ;
CVE-2018-12130) aka = "MFBDS" ; ;
CVE-2018-12127) aka = "MLPDS" ; ;
CVE-2019-11091) aka = "MDSUM" ; ;
2019-11-12 21:16:21 +01:00
CVE-2019-11135) aka = "TAA" ; ;
2019-11-24 19:25:56 +01:00
CVE-2018-12207) aka = "ITLBMH" ; ;
2020-04-16 12:59:28 +02:00
CVE-2020-0543) aka = "SRBDS" ; ;
2019-05-05 18:15:41 +02:00
*) echo " $0 : error: invalid CVE ' $1 ' passed to pvulnstatus() " >& 2; exit 255; ;
2018-02-25 16:51:42 +01:00
esac
2018-01-13 20:33:12 +01:00
case " $opt_batch_format " in
text) _echo 0 " $1 : $2 ( $3 ) " ; ;
2018-09-24 20:05:41 +02:00
short) short_output = " ${ short_output } $1 " ; ;
2018-01-13 20:33:12 +01:00
json)
case " $2 " in
UNK) is_vuln = "null" ; ;
VULN) is_vuln = "true" ; ;
OK) is_vuln = "false" ; ;
2019-05-05 18:15:41 +02:00
*) echo " $0 : error: unknown status ' $2 ' passed to pvulnstatus() " >& 2; exit 255; ;
2018-01-13 20:33:12 +01:00
esac
2019-11-23 16:02:00 +01:00
[ -z " $json_output " ] && json_output = '['
json_output = " ${ json_output } {\"NAME\":\" $aka \",\"CVE\":\" $1 \",\"VULNERABLE\": $is_vuln ,\"INFOS\":\" $3 \"}, "
2018-01-13 20:33:12 +01:00
; ;
nrpe) [ " $2 " = VULN ] && nrpe_vuln = " $nrpe_vuln $1 " ; ;
2018-02-25 16:51:42 +01:00
prometheus)
prometheus_output = " ${ prometheus_output : + $prometheus_output \n } specex_vuln_status{name=\" $aka \",cve=\" $1 \",status=\" $2 \",info=\" $3 \"} 1 "
; ;
2019-05-05 18:34:09 +02:00
*) echo " $0 : error: invalid batch format ' $opt_batch_format ' specified " >& 2; exit 255; ;
2018-01-10 12:18:45 +01:00
esac
fi
2018-01-13 20:33:12 +01:00
# always fill global_* vars because we use that do decide the program exit code
case " $2 " in
UNK) global_unknown = "1" ; ;
VULN) global_critical = "1" ; ;
2019-05-05 18:15:41 +02:00
OK) ; ;
*) echo " $0 : error: unknown status ' $2 ' passed to pvulnstatus() " >& 2; exit 255; ;
2018-01-13 20:33:12 +01:00
esac
# display info if we're not in quiet/batch mode
2018-01-14 15:47:22 +01:00
vulnstatus = " $2 "
shift 2
2018-01-09 13:37:26 +01:00
_info_nol "> \033[46m\033[30mSTATUS:\033[0m "
2022-03-20 12:05:33 +01:00
: " ${ final_summary : = } "
2018-01-14 15:47:22 +01:00
case " $vulnstatus " in
2018-09-17 21:44:22 +02:00
UNK) pstatus yellow 'UNKNOWN' " $@ " ; final_summary = " $final_summary \033[43m\033[30m $pvulnstatus_last_cve :??\033[0m " ; ;
VULN) pstatus red 'VULNERABLE' " $@ " ; final_summary = " $final_summary \033[41m\033[30m $pvulnstatus_last_cve :KO\033[0m " ; ;
OK) pstatus green 'NOT VULNERABLE' " $@ " ; final_summary = " $final_summary \033[42m\033[30m $pvulnstatus_last_cve :OK\033[0m " ; ;
2019-05-05 18:15:41 +02:00
*) echo " $0 : error: unknown status ' $vulnstatus ' passed to pvulnstatus() " >& 2; exit 255; ;
2018-01-09 13:37:26 +01:00
esac
}
2018-01-09 13:04:49 +01:00
# The 3 below functions are taken from the extract-linux script, available here:
# https://github.com/torvalds/linux/blob/master/scripts/extract-vmlinux
# The functions have been modified for better integration to this script
# The original header of the file has been retained below
# ----------------------------------------------------------------------
# extract-vmlinux - Extract uncompressed vmlinux from a kernel image
#
# Inspired from extract-ikconfig
# (c) 2009,2010 Dick Streefland <dick@streefland.net>
#
# (c) 2011 Corentin Chary <corentin.chary@gmail.com>
#
# Licensed under the GNU General Public License, version 2 (GPLv2).
# ----------------------------------------------------------------------
2018-04-01 17:29:12 +02:00
kernel = ''
kernel_err = ''
check_kernel( )
2018-01-09 13:04:49 +01:00
{
2018-03-24 23:58:13 +01:00
_file = " $1 "
2022-03-20 12:05:33 +01:00
_mode = " ${ 2 :- normal } "
2018-03-17 16:02:11 +01:00
# checking the return code of readelf -h is not enough, we could get
# a damaged ELF file and validate it, check for stderr warnings too
2019-11-23 18:01:36 +01:00
# the warning "readelf: Warning: [16]: Link field (0) should index a symtab section./" can appear on valid kernels, ignore it
_readelf_warnings = $( " ${ opt_arch_prefix } readelf " -S " $_file " 2>& 1 >/dev/null | grep -v 'should index a symtab section' | tr "\n" "/" ) ; ret = $?
2018-03-24 23:58:13 +01:00
_readelf_sections = $( " ${ opt_arch_prefix } readelf " -S " $_file " 2>/dev/null | grep -c -e data -e text -e init)
2018-04-01 17:29:12 +02:00
_kernel_size = $( stat -c %s " $_file " 2>/dev/null || stat -f %z " $_file " 2>/dev/null || echo 10000)
_debug " check_kernel: ret= $? size= $_kernel_size sections= $_readelf_sections warnings= $_readelf_warnings "
2019-11-23 16:28:08 +01:00
if [ " $_mode " = desperate ] ; then
2018-03-24 23:58:13 +01:00
if " ${ opt_arch_prefix } strings " " $_file " | grep -Eq '^Linux version ' ; then
2018-04-01 17:29:12 +02:00
_debug "check_kernel (desperate): ... matched!"
2019-11-24 22:45:38 +01:00
if [ " $_readelf_sections " = 0 ] && grep -qF -e armv6 -e armv7 " $_file " ; then
_debug "check_kernel (desperate): raw arm binary found, adjusting objdump options"
objdump_options = "-D -b binary -marm"
else
objdump_options = "-d"
fi
2018-03-24 23:58:13 +01:00
return 0
else
2018-04-01 17:29:12 +02:00
_debug "check_kernel (desperate): ... invalid"
2018-03-24 23:58:13 +01:00
fi
else
if [ $ret -eq 0 ] && [ -z " $_readelf_warnings " ] && [ " $_readelf_sections " -gt 0 ] ; then
2018-04-01 17:29:12 +02:00
if [ " $_kernel_size " -ge 100000 ] ; then
_debug "check_kernel: ... file is valid"
2019-11-24 22:45:38 +01:00
objdump_options = "-d"
2018-03-24 23:58:13 +01:00
return 0
else
2018-04-01 17:29:12 +02:00
_debug "check_kernel: ... file seems valid but is too small, ignoring"
2018-03-24 23:58:13 +01:00
fi
else
2018-04-01 17:29:12 +02:00
_debug "check_kernel: ... file is invalid"
2018-03-24 23:58:13 +01:00
fi
2018-03-17 16:02:11 +01:00
fi
2018-01-18 11:01:26 +01:00
return 1
2018-01-09 13:04:49 +01:00
}
try_decompress( )
{
# The obscure use of the "tr" filter is to work around older versions of
# "grep" that report the byte offset of the line instead of the pattern.
# Try to find the header ($1) and decompress from here
2018-03-17 13:34:53 +01:00
_debug " try_decompress: looking for $3 magic in $6 "
2018-01-29 10:29:48 +01:00
for pos in $( tr " $1 \n $2 " " \n $2 = " < " $6 " | grep -abo " ^ $2 " )
2018-01-09 13:04:49 +01:00
do
2018-01-10 20:10:57 +01:00
_debug " try_decompress: magic for $3 found at offset $pos "
2019-05-05 18:34:09 +02:00
if ! command -v " $3 " >/dev/null 2>& 1; then
2019-11-23 16:28:08 +01:00
if [ " $8 " = 1 ] ; then
# pass1: if the tool is not installed, just bail out silently
# and hope that the next decompression tool will be, and that
# it'll happen to be the proper one for this kernel
_debug " try_decompress: the ' $3 ' tool is not installed (pass 1), try the next algo "
else
# pass2: if the tool is not installed, populate kernel_err this time
kernel_err = " missing ' $3 ' tool, please install it, usually it's in the ' $5 ' package "
_debug " try_decompress: $kernel_err "
fi
return 1
2018-01-09 13:04:49 +01:00
fi
pos = ${ pos %% : * }
2018-01-29 10:29:48 +01:00
# shellcheck disable=SC2086
2018-04-01 17:29:12 +02:00
tail -c+$pos " $6 " 2>/dev/null | $3 $4 > " $kerneltmp " 2>/dev/null; ret = $?
if [ ! -s " $kerneltmp " ] ; then
2018-03-17 13:34:53 +01:00
# don't rely on $ret, sometimes it's != 0 but worked
# (e.g. gunzip ret=2 just means there was trailing garbage)
_debug " try_decompress: decompression with $3 failed (err= $ret ) "
2018-04-01 17:29:12 +02:00
elif check_kernel " $kerneltmp " " $7 " ; then
kernel = " $kerneltmp "
2018-01-10 20:10:57 +01:00
_debug " try_decompress: decompressed with $3 successfully! "
return 0
2018-03-17 13:34:53 +01:00
elif [ " $3 " != "cat" ] ; then
_debug " try_decompress: decompression with $3 worked but result is not a kernel, trying with an offset "
2018-04-01 17:29:12 +02:00
[ -z " $kerneltmp2 " ] && kerneltmp2 = $( mktemp /tmp/kernel-XXXXXX)
cat " $kerneltmp " > " $kerneltmp2 "
try_decompress '\177ELF' xxy 'cat' '' cat " $kerneltmp2 " && return 0
2018-01-10 20:10:57 +01:00
else
2018-03-17 13:34:53 +01:00
_debug " try_decompress: decompression with $3 worked but result is not a kernel "
2018-01-10 20:10:57 +01:00
fi
2018-01-09 13:04:49 +01:00
done
return 1
}
2018-04-01 17:29:12 +02:00
extract_kernel( )
2018-01-09 13:04:49 +01:00
{
2022-03-20 12:05:33 +01:00
[ -n " ${ 1 :- } " ] || return 1
2018-01-09 13:04:49 +01:00
# Prepare temp files:
2018-04-01 17:29:12 +02:00
kerneltmp = " $( mktemp /tmp/kernel-XXXXXX) "
2018-01-09 13:04:49 +01:00
# Initial attempt for uncompressed images or objects:
2018-04-01 17:29:12 +02:00
if check_kernel " $1 " ; then
2019-11-23 14:01:56 +01:00
_debug "extract_kernel: found kernel is valid, no decompression needed"
2018-04-01 17:29:12 +02:00
cat " $1 " > " $kerneltmp "
kernel = $kerneltmp
2018-01-09 13:04:49 +01:00
return 0
fi
# That didn't work, so retry after decompression.
2019-11-23 16:28:08 +01:00
for pass in 1 2; do
for mode in normal desperate; do
_debug " extract_kernel: pass $pass $mode mode "
try_decompress '\037\213\010' xy gunzip '' gunzip " $1 " " $mode " " $pass " && return 0
try_decompress '\002\041\114\030' xyy 'lz4' '-d -l' liblz4-tool " $1 " " $mode " " $pass " && return 0
try_decompress '\3757zXZ\000' abcde unxz '' xz-utils " $1 " " $mode " " $pass " && return 0
try_decompress 'BZh' xy bunzip2 '' bzip2 " $1 " " $mode " " $pass " && return 0
try_decompress '\135\0\0\0' xxx unlzma '' xz-utils " $1 " " $mode " " $pass " && return 0
try_decompress '\211\114\132' xy 'lzop' '-d' lzop " $1 " " $mode " " $pass " && return 0
try_decompress '\177ELF' xxy 'cat' '' cat " $1 " " $mode " " $pass " && return 0
2020-09-14 21:29:33 +02:00
try_decompress '(\265/\375' xxy unzstd '' zstd " $1 " " $mode " " $pass " && return 0
2019-11-23 16:28:08 +01:00
done
2018-03-24 23:58:13 +01:00
done
2021-03-24 21:45:08 +01:00
# kernel_err might already have been populated by try_decompress() if we're missing one of the tools
if [ -z " $kernel_err " ] ; then
kernel_err = "kernel compression format is unknown or image is invalid"
fi
2019-11-23 16:28:08 +01:00
_verbose " Couldn't extract the kernel image ( $kernel_err ), accuracy might be reduced "
2018-01-09 13:04:49 +01:00
return 1
}
# end of extract-vmlinux functions
2018-01-16 10:33:01 +01:00
mount_debugfs( )
{
if [ ! -e /sys/kernel/debug/sched_features ] ; then
# try to mount the debugfs hierarchy ourselves and remember it to umount afterwards
mount -t debugfs debugfs /sys/kernel/debug 2>/dev/null && mounted_debugfs = 1
fi
}
load_msr( )
{
2022-03-20 00:55:49 +01:00
# only attempt to do it once even if called multiple times
2022-03-20 12:05:33 +01:00
[ " ${ load_msr_once :- } " = 1 ] && return
2022-03-20 00:55:49 +01:00
load_msr_once = 1
2018-03-25 12:23:46 +02:00
if [ " $os " = Linux ] ; then
2019-11-19 22:35:08 +01:00
if ! grep -qw msr " $procfs /modules " 2>/dev/null; then
2018-05-03 23:21:48 +02:00
modprobe msr 2>/dev/null && insmod_msr = 1
2018-05-03 23:30:54 +02:00
_debug " attempted to load module msr, insmod_msr= $insmod_msr "
2018-05-03 23:21:48 +02:00
else
_debug "msr module already loaded"
fi
2018-03-25 12:23:46 +02:00
else
if ! kldstat -q -m cpuctl; then
kldload cpuctl 2>/dev/null && kldload_cpuctl = 1
_debug " attempted to load module cpuctl, kldload_cpuctl= $kldload_cpuctl "
else
_debug "cpuctl module already loaded"
fi
fi
2018-01-16 10:33:01 +01:00
}
load_cpuid( )
{
2022-03-20 00:55:49 +01:00
# only attempt to do it once even if called multiple times
2022-03-20 12:05:33 +01:00
[ " ${ load_cpuid_once :- } " = 1 ] && return
2022-03-20 00:55:49 +01:00
load_cpuid_once = 1
2018-03-25 12:23:46 +02:00
if [ " $os " = Linux ] ; then
2019-11-19 22:35:08 +01:00
if ! grep -qw cpuid " $procfs /modules " 2>/dev/null; then
2018-05-03 23:21:48 +02:00
modprobe cpuid 2>/dev/null && insmod_cpuid = 1
_debug " attempted to load module cpuid, insmod_cpuid= $insmod_cpuid "
else
_debug "cpuid module already loaded"
fi
2018-03-25 12:23:46 +02:00
else
if ! kldstat -q -m cpuctl; then
kldload cpuctl 2>/dev/null && kldload_cpuctl = 1
_debug " attempted to load module cpuctl, kldload_cpuctl= $kldload_cpuctl "
else
_debug "cpuctl module already loaded"
fi
fi
2018-01-16 10:33:01 +01:00
}
2018-04-08 14:41:08 +02:00
# shellcheck disable=SC2034
EAX = 1; EBX = 2; ECX = 3; EDX = 4;
2022-03-20 00:08:17 +01:00
READ_CPUID_RET_OK = 0
READ_CPUID_RET_KO = 1
READ_CPUID_RET_ERR = 2
2018-01-31 13:54:59 +01:00
read_cpuid( )
{
2022-03-20 11:04:57 +01:00
if [ " $opt_cpu " != all ] ; then
# we only have one core to read, do it and return the result
read_cpuid_one_core $opt_cpu " $@ "
return $?
fi
# otherwise we must read all cores
for _core in $( seq 0 " $max_core_id " ) ; do
read_cpuid_one_core " $_core " " $@ " ; ret = $?
if [ " $_core " = 0 ] ; then
# save the result of the first core, for comparison with the others
_first_core_ret = $ret
_first_core_value = $read_cpuid_value
else
# compare first core with the other ones
if [ $_first_core_ret != $ret ] || [ " $_first_core_value " != " $read_cpuid_value " ] ; then
read_cpuid_msg = " result is not homogeneous between all cores, at least core 0 and $_core differ! "
return $READ_CPUID_RET_ERR
fi
fi
done
# if we're here, all cores agree, return the result
return $ret
}
read_cpuid_one_core( )
{
# on which core to send the CPUID instruction
_core = " $1 "
2018-04-05 00:06:24 +02:00
# leaf is the value of the eax register when calling the cpuid instruction:
2022-03-20 11:04:57 +01:00
_leaf = " $2 "
2022-03-19 18:39:10 +01:00
# subleaf is the value of the ecx register when calling the cpuid instruction:
2022-03-20 11:04:57 +01:00
_subleaf = " $3 "
2018-04-05 00:06:24 +02:00
# eax=1 ebx=2 ecx=3 edx=4:
2022-03-20 11:04:57 +01:00
_register = " $4 "
2022-03-19 18:39:10 +01:00
# number of bits to shift the register right to, 0-31:
2022-03-20 11:04:57 +01:00
_shift = " $5 "
2018-04-05 00:06:24 +02:00
# mask to apply as an AND operand to the shifted register value
2022-03-20 11:04:57 +01:00
_mask = " $6 "
2018-04-05 00:06:24 +02:00
# wanted value (optional), if present we return 0(true) if the obtained value is equal, 1 otherwise:
2022-03-20 12:05:33 +01:00
_wanted = " ${ 7 :- } "
2018-04-05 00:06:24 +02:00
# in any case, the read value is globally available in $read_cpuid_value
read_cpuid_value = ''
2022-03-20 11:04:57 +01:00
read_cpuid_msg = 'unknown error'
2022-03-19 18:39:10 +01:00
2022-03-20 11:04:57 +01:00
if [ $# -lt 6 ] ; then
read_cpuid_msg = " read_cpuid: missing arguments, got only $# , expected at least 6: $* "
2022-03-20 00:08:17 +01:00
return $READ_CPUID_RET_ERR
2022-03-19 18:39:10 +01:00
fi
if [ " $_register " -gt 4 ] ; then
2022-03-20 00:08:17 +01:00
read_cpuid_msg = " read_cpuid: register must be 0-4, got $_register "
return $READ_CPUID_RET_ERR
2022-03-19 18:39:10 +01:00
fi
if [ " $_shift " -gt 32 ] ; then
2022-03-20 00:08:17 +01:00
read_cpuid_msg = " read_cpuid: shift must be 0-31, got $_shift "
return $READ_CPUID_RET_ERR
2022-03-19 18:39:10 +01:00
fi
2018-03-25 12:23:46 +02:00
if [ ! -e /dev/cpu/0/cpuid ] && [ ! -e /dev/cpuctl0 ] ; then
2018-01-31 13:54:59 +01:00
# try to load the module ourselves (and remember it so we can rmmod it afterwards)
load_cpuid
fi
2018-03-25 12:23:46 +02:00
if [ -e /dev/cpu/0/cpuid ] ; then
# Linux
2018-09-24 20:25:52 +02:00
if [ ! -r /dev/cpu/0/cpuid ] ; then
2022-03-20 00:08:17 +01:00
read_cpuid_msg = "Couldn't load cpuid module"
return $READ_CPUID_RET_ERR
fi
# on some kernel versions, /dev/cpu/0/cpuid doesn't imply that the cpuid module is loaded, in that case dd returns an error,
# we use that fact to load the module if dd returns an error
if ! dd if = /dev/cpu/0/cpuid bs = 16 count = 1 >/dev/null 2>& 1; then
load_cpuid
2018-09-24 20:25:52 +02:00
fi
2018-03-25 12:23:46 +02:00
# we need _leaf to be converted to decimal for dd
_leaf = $(( _leaf ))
2022-03-19 18:39:10 +01:00
_subleaf = $(( _subleaf ))
_position = $(( _leaf + ( _subleaf << 32 ) ))
2018-07-22 20:07:44 +02:00
# to avoid using iflag=skip_bytes, which doesn't exist on old versions of dd, seek to the closer multiple-of-16
2022-03-19 18:39:10 +01:00
_ddskip = $(( _position / 16 ))
_odskip = $(( _position - _ddskip * 16 ))
2018-09-08 23:15:21 +02:00
# now read the value
2022-03-20 11:04:57 +01:00
_cpuid = $( dd if = " /dev/cpu/ $_core /cpuid " bs = 16 skip = $_ddskip count = $(( _odskip + 1 )) 2>/dev/null | od -j $(( _odskip * 16 )) -A n -t u4)
2018-03-25 12:23:46 +02:00
elif [ -e /dev/cpuctl0 ] ; then
# BSD
2018-09-24 20:25:52 +02:00
if [ ! -r /dev/cpuctl0 ] ; then
2022-03-20 00:08:17 +01:00
read_cpuid_msg = "Couldn't read cpuid info from cpuctl"
return $READ_CPUID_RET_ERR
2018-09-24 20:25:52 +02:00
fi
2022-03-20 11:04:57 +01:00
_cpuid = $( cpucontrol -i " $_leaf " ," $_subleaf " " /dev/cpuctl $_core " 2>/dev/null | cut -d: -f2-)
2022-03-19 18:39:10 +01:00
# cpuid level 0x4, level_type 0x2: 0x1c004143 0x01c0003f 0x000001ff 0x00000000
2018-04-05 00:06:24 +02:00
else
2022-03-20 00:08:17 +01:00
read_cpuid_msg = "Found no way to read cpuid info"
return $READ_CPUID_RET_ERR
2018-04-05 00:06:24 +02:00
fi
2022-03-20 11:04:57 +01:00
_debug " cpuid: leaf $_leaf subleaf $_subleaf on cpu $_core , eax-ebx-ecx-edx: $_cpuid "
2022-03-19 18:39:10 +01:00
_mockvarname = " SMC_MOCK_CPUID_ ${ _leaf } _ ${ _subleaf } "
2022-03-20 12:05:33 +01:00
# shellcheck disable=SC1083
if [ -n " $( eval echo \$ { $_mockvarname :-} ) " ] ; then
2019-05-23 14:26:40 +02:00
_cpuid = " $( eval echo \$ $_mockvarname ) "
2022-03-19 18:39:10 +01:00
_debug " read_cpuid: MOCKING enabled for leaf $_leaf subleaf $_subleaf , will return $_cpuid "
2019-05-23 14:26:40 +02:00
mocked = 1
2019-05-24 10:15:02 +02:00
else
2022-03-19 18:39:10 +01:00
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_CPUID_ ${ _leaf } _ ${ _subleaf } =' $_cpuid ' " )
2019-05-23 14:26:40 +02:00
fi
2022-03-20 00:08:17 +01:00
if [ -z " $_cpuid " ] ; then
read_cpuid_msg = "Failed to get cpuid data"
return $READ_CPUID_RET_ERR
fi
2018-04-05 00:06:24 +02:00
# get the value of the register we want
_reg = $( echo " $_cpuid " | awk '{print $' " $_register " '}' )
# Linux returns it as decimal, BSD as hex, normalize to decimal
_reg = $(( _reg ))
# shellcheck disable=SC2046
_debug " cpuid: wanted register ( $_register ) has value $_reg aka " $( printf "%08x" " $_reg " )
_reg_shifted = $(( _reg >> _shift ))
# shellcheck disable=SC2046
_debug " cpuid: shifted value by $_shift is $_reg_shifted aka " $( printf "%x" " $_reg_shifted " )
read_cpuid_value = $(( _reg_shifted & _mask ))
# shellcheck disable=SC2046
_debug " cpuid: after AND $_mask , final value is $read_cpuid_value aka " $( printf "%x" " $read_cpuid_value " )
if [ -n " $_wanted " ] ; then
_debug " cpuid: wanted $_wanted and got $read_cpuid_value "
if [ " $read_cpuid_value " = " $_wanted " ] ; then
2022-03-20 00:08:17 +01:00
return $READ_CPUID_RET_OK
2018-03-25 12:23:46 +02:00
else
2022-03-20 00:08:17 +01:00
return $READ_CPUID_RET_KO
2018-03-25 12:23:46 +02:00
fi
2018-01-31 13:54:59 +01:00
fi
2018-03-25 12:23:46 +02:00
2022-03-20 00:08:17 +01:00
return $READ_CPUID_RET_OK
2018-01-31 13:54:59 +01:00
}
2018-01-21 15:17:10 +01:00
dmesg_grep( )
{
# grep for something in dmesg, ensuring that the dmesg buffer
# has not been truncated
dmesg_grepped = ''
2018-03-25 12:23:46 +02:00
if ! dmesg | grep -qE -e '(^|\] )Linux version [0-9]' -e '^FreeBSD is a registered' ; then
2018-01-21 15:17:10 +01:00
# dmesg truncated
return 2
fi
dmesg_grepped = $( dmesg | grep -E " $1 " | head -1)
# not found:
[ -z " $dmesg_grepped " ] && return 1
# found, output is in $dmesg_grepped
return 0
}
2018-01-16 10:33:01 +01:00
is_coreos( )
{
2019-05-05 18:34:09 +02:00
command -v coreos-install >/dev/null 2>& 1 && command -v toolbox >/dev/null 2>& 1 && return 0
2018-01-16 10:33:01 +01:00
return 1
}
2018-01-31 13:00:58 +01:00
parse_cpu_details( )
{
2022-03-20 12:05:33 +01:00
[ " ${ parse_cpu_details_done :- } " = 1 ] && return 0
2018-01-31 13:00:58 +01:00
2022-03-20 11:04:57 +01:00
if command -v nproc >/dev/null; then
number_of_cores = $( nproc)
elif echo " $os " | grep -q BSD; then
number_of_cores = $( sysctl -n hw.ncpu 2>/dev/null || echo 1)
elif [ -e " $procfs /cpuinfo " ] ; then
number_of_cores = $( grep -c ^processor " $procfs /cpuinfo " 2>/dev/null || echo 1)
else
# if we don't know, default to 1 CPU
number_of_cores = 1
fi
max_core_id = $(( number_of_cores - 1 ))
2018-03-25 12:23:46 +02:00
if [ -e " $procfs /cpuinfo " ] ; then
cpu_vendor = $( grep '^vendor_id' " $procfs /cpuinfo " | awk '{print $3}' | head -1)
cpu_friendly_name = $( grep '^model name' " $procfs /cpuinfo " | cut -d: -f2- | head -1 | sed -e 's/^ *//' )
# special case for ARM follows
if grep -qi 'CPU implementer[[:space:]]*:[[:space:]]*0x41' " $procfs /cpuinfo " ; then
cpu_vendor = 'ARM'
# some devices (phones or other) have several ARMs and as such different part numbers,
# an example is "bigLITTLE", so we need to store the whole list, this is needed for is_cpu_vulnerable
cpu_part_list = $( awk '/CPU part/ {print $4}' " $procfs /cpuinfo " )
cpu_arch_list = $( awk '/CPU architecture/ {print $3}' " $procfs /cpuinfo " )
# take the first one to fill the friendly name, do NOT quote the vars below
# shellcheck disable=SC2086
cpu_arch = $( echo $cpu_arch_list | awk '{ print $1 }' )
# shellcheck disable=SC2086
cpu_part = $( echo $cpu_part_list | awk '{ print $1 }' )
[ " $cpu_arch " = "AArch64" ] && cpu_arch = 8
cpu_friendly_name = "ARM"
[ -n " $cpu_arch " ] && cpu_friendly_name = " $cpu_friendly_name v $cpu_arch "
[ -n " $cpu_part " ] && cpu_friendly_name = " $cpu_friendly_name model $cpu_part "
2018-07-22 19:06:19 +02:00
elif grep -qi 'CPU implementer[[:space:]]*:[[:space:]]*0x43' " $procfs /cpuinfo " ; then
cpu_vendor = 'CAVIUM'
2020-12-30 10:16:40 +01:00
elif grep -qi 'CPU implementer[[:space:]]*:[[:space:]]*0x70' " $procfs /cpuinfo " ; then
cpu_vendor = 'PHYTIUM'
2018-03-25 12:23:46 +02:00
fi
cpu_family = $( grep '^cpu family' " $procfs /cpuinfo " | awk '{print $4}' | grep -E '^[0-9]+$' | head -1)
cpu_model = $( grep '^model' " $procfs /cpuinfo " | awk '{print $3}' | grep -E '^[0-9]+$' | head -1)
cpu_stepping = $( grep '^stepping' " $procfs /cpuinfo " | awk '{print $3}' | grep -E '^[0-9]+$' | head -1)
2018-09-23 15:00:39 +02:00
cpu_ucode = $( grep '^microcode' " $procfs /cpuinfo " | awk '{print $3}' | head -1)
2018-03-25 12:23:46 +02:00
else
2020-02-06 19:54:27 +01:00
cpu_vendor = $( dmesg | grep -i -m1 'Origin=' | cut -f2 -w | cut -f2 -d= | cut -f2 -d\" )
cpu_family = $( dmesg | grep -i -m1 'Family=' | cut -f4 -w | cut -f2 -d= )
cpu_family = $(( cpu_family ))
cpu_model = $( dmesg | grep -i -m1 'Model=' | cut -f5 -w | cut -f2 -d= )
cpu_model = $(( cpu_model ))
cpu_stepping = $( dmesg | grep -i -m1 'Stepping=' | cut -f6 -w | cut -f2 -d= )
cpu_friendly_name = $( sysctl -n hw.model 2>/dev/null)
2018-03-25 12:23:46 +02:00
fi
2018-01-31 13:00:58 +01:00
2022-03-20 12:05:33 +01:00
if [ -n " ${ SMC_MOCK_CPU_FRIENDLY_NAME :- } " ] ; then
2019-05-23 14:26:40 +02:00
cpu_friendly_name = " $SMC_MOCK_CPU_FRIENDLY_NAME "
_debug " parse_cpu_details: MOCKING cpu friendly name to $cpu_friendly_name "
mocked = 1
2019-05-24 10:15:02 +02:00
else
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_CPU_FRIENDLY_NAME=' $cpu_friendly_name ' " )
2019-05-23 14:26:40 +02:00
fi
2022-03-20 12:05:33 +01:00
if [ -n " ${ SMC_MOCK_CPU_VENDOR :- } " ] ; then
2019-05-23 14:26:40 +02:00
cpu_vendor = " $SMC_MOCK_CPU_VENDOR "
_debug " parse_cpu_details: MOCKING cpu vendor to $cpu_vendor "
mocked = 1
2019-05-24 10:15:02 +02:00
else
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_CPU_VENDOR=' $cpu_vendor ' " )
2019-05-23 14:26:40 +02:00
fi
2022-03-20 12:05:33 +01:00
if [ -n " ${ SMC_MOCK_CPU_FAMILY :- } " ] ; then
2019-05-23 14:26:40 +02:00
cpu_family = " $SMC_MOCK_CPU_FAMILY "
_debug " parse_cpu_details: MOCKING cpu family to $cpu_family "
mocked = 1
2019-05-24 10:15:02 +02:00
else
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_CPU_FAMILY=' $cpu_family ' " )
2019-05-23 14:26:40 +02:00
fi
2022-03-20 12:05:33 +01:00
if [ -n " ${ SMC_MOCK_CPU_MODEL :- } " ] ; then
2019-05-23 14:26:40 +02:00
cpu_model = " $SMC_MOCK_CPU_MODEL "
_debug " parse_cpu_details: MOCKING cpu model to $cpu_model "
mocked = 1
2019-05-24 10:15:02 +02:00
else
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_CPU_MODEL=' $cpu_model ' " )
2019-05-23 14:26:40 +02:00
fi
2022-03-20 12:05:33 +01:00
if [ -n " ${ SMC_MOCK_CPU_STEPPING :- } " ] ; then
2019-05-23 14:26:40 +02:00
cpu_stepping = " $SMC_MOCK_CPU_STEPPING "
_debug " parse_cpu_details: MOCKING cpu stepping to $cpu_stepping "
mocked = 1
2019-05-24 10:15:02 +02:00
else
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_CPU_STEPPING=' $cpu_stepping ' " )
2019-05-23 14:26:40 +02:00
fi
2018-04-05 00:07:12 +02:00
# get raw cpuid, it's always useful (referenced in the Intel doc for firmware updates for example)
2022-03-19 18:39:10 +01:00
if read_cpuid 0x1 0x0 $EAX 0 0xFFFFFFFF; then
2018-08-15 12:53:49 +02:00
cpu_cpuid = " $read_cpuid_value "
2018-09-24 20:25:52 +02:00
else
cpu_cpuid = 0
2018-04-05 00:07:12 +02:00
fi
# under BSD, linprocfs often doesn't export ucode information, so fetch it ourselves the good old way
if [ -z " $cpu_ucode " ] && [ " $os " != Linux ] ; then
load_cpuid
if [ -e /dev/cpuctl0 ] ; then
# init MSR with NULLs
cpucontrol -m 0x8b = 0 /dev/cpuctl0
# call CPUID
cpucontrol -i 1 /dev/cpuctl0 >/dev/null
# read MSR
cpu_ucode = $( cpucontrol -m 0x8b /dev/cpuctl0 | awk '{print $3}' )
# convert to decimal
cpu_ucode = $(( cpu_ucode ))
# convert back to hex
cpu_ucode = $( printf "0x%x" " $cpu_ucode " )
fi
fi
2018-09-23 15:00:39 +02:00
# if we got no cpu_ucode (e.g. we're in a vm), fall back to 0x0
2022-03-20 12:05:33 +01:00
: " ${ cpu_ucode : =0x0 } "
2018-09-23 15:00:39 +02:00
2022-03-20 12:05:33 +01:00
if [ -n " ${ SMC_MOCK_CPU_UCODE :- } " ] ; then
2019-05-23 14:26:40 +02:00
cpu_ucode = " $SMC_MOCK_CPU_UCODE "
_debug " parse_cpu_details: MOCKING cpu ucode to $cpu_ucode "
mocked = 1
2019-05-24 10:15:02 +02:00
else
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_CPU_UCODE=' $cpu_ucode ' " )
2019-05-23 14:26:40 +02:00
fi
2018-08-15 12:53:49 +02:00
echo " $cpu_ucode " | grep -q ^0x && cpu_ucode = $(( cpu_ucode ))
2020-02-06 19:54:27 +01:00
ucode_found = $( printf "family 0x%x model 0x%x stepping 0x%x ucode 0x%x cpuid 0x%x" " $cpu_family " " $cpu_model " " $cpu_stepping " " $cpu_ucode " " $cpu_cpuid " )
2018-04-05 21:39:27 +02:00
2018-01-31 13:00:58 +01:00
# also define those that we will need in other funcs
2019-11-24 19:25:56 +01:00
# taken from https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/x86/include/asm/intel-family.h
2022-03-20 12:09:29 +01:00
# curl -s 'https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/plain/arch/x86/include/asm/intel-family.h' | awk '/#define INTEL_FAM6/ {print $2"=$(( "$3" )) # "$4,$5,$6,$7,$8,$9}' | sed -re 's/ +$//'
2018-01-31 14:58:54 +01:00
# shellcheck disable=SC2034
{
2019-11-24 19:25:56 +01:00
INTEL_FAM6_CORE_YONAH = $(( 0 x0E )) #
INTEL_FAM6_CORE2_MEROM = $(( 0 x0F )) #
INTEL_FAM6_CORE2_MEROM_L = $(( 0 x16 )) #
INTEL_FAM6_CORE2_PENRYN = $(( 0 x17 )) #
INTEL_FAM6_CORE2_DUNNINGTON = $(( 0 x1D )) #
INTEL_FAM6_NEHALEM = $(( 0 x1E )) #
INTEL_FAM6_NEHALEM_G = $(( 0 x1F )) # /* Auburndale / Havendale */
INTEL_FAM6_NEHALEM_EP = $(( 0 x1A )) #
INTEL_FAM6_NEHALEM_EX = $(( 0 x2E )) #
INTEL_FAM6_WESTMERE = $(( 0 x25 )) #
INTEL_FAM6_WESTMERE_EP = $(( 0 x2C )) #
INTEL_FAM6_WESTMERE_EX = $(( 0 x2F )) #
INTEL_FAM6_SANDYBRIDGE = $(( 0 x2A )) #
INTEL_FAM6_SANDYBRIDGE_X = $(( 0 x2D )) #
INTEL_FAM6_IVYBRIDGE = $(( 0 x3A )) #
INTEL_FAM6_IVYBRIDGE_X = $(( 0 x3E )) #
INTEL_FAM6_HASWELL = $(( 0 x3C )) #
INTEL_FAM6_HASWELL_X = $(( 0 x3F )) #
INTEL_FAM6_HASWELL_L = $(( 0 x45 )) #
INTEL_FAM6_HASWELL_G = $(( 0 x46 )) #
INTEL_FAM6_BROADWELL = $(( 0 x3D )) #
INTEL_FAM6_BROADWELL_G = $(( 0 x47 )) #
INTEL_FAM6_BROADWELL_X = $(( 0 x4F )) #
INTEL_FAM6_BROADWELL_D = $(( 0 x56 )) #
2022-03-20 12:09:29 +01:00
INTEL_FAM6_SKYLAKE_L = $(( 0 x4E )) # /* Sky Lake */
INTEL_FAM6_SKYLAKE = $(( 0 x5E )) # /* Sky Lake */
INTEL_FAM6_SKYLAKE_X = $(( 0 x55 )) # /* Sky Lake */
INTEL_FAM6_KABYLAKE_L = $(( 0 x8E )) # /* Sky Lake */
INTEL_FAM6_KABYLAKE = $(( 0 x9E )) # /* Sky Lake */
INTEL_FAM6_COMETLAKE = $(( 0 xA5 )) # /* Sky Lake */
INTEL_FAM6_COMETLAKE_L = $(( 0 xA6 )) # /* Sky Lake */
INTEL_FAM6_CANNONLAKE_L = $(( 0 x66 )) # /* Palm Cove */
INTEL_FAM6_ICELAKE_X = $(( 0 x6A )) # /* Sunny Cove */
INTEL_FAM6_ICELAKE_D = $(( 0 x6C )) # /* Sunny Cove */
INTEL_FAM6_ICELAKE = $(( 0 x7D )) # /* Sunny Cove */
INTEL_FAM6_ICELAKE_L = $(( 0 x7E )) # /* Sunny Cove */
INTEL_FAM6_ICELAKE_NNPI = $(( 0 x9D )) # /* Sunny Cove */
INTEL_FAM6_LAKEFIELD = $(( 0 x8A )) # /* Sunny Cove / Tremont */
INTEL_FAM6_ROCKETLAKE = $(( 0 xA7 )) # /* Cypress Cove */
INTEL_FAM6_TIGERLAKE_L = $(( 0 x8C )) # /* Willow Cove */
INTEL_FAM6_TIGERLAKE = $(( 0 x8D )) # /* Willow Cove */
INTEL_FAM6_SAPPHIRERAPIDS_X = $(( 0 x8F )) # /* Golden Cove */
INTEL_FAM6_ALDERLAKE = $(( 0 x97 )) # /* Golden Cove / Gracemont */
INTEL_FAM6_ALDERLAKE_L = $(( 0 x9A )) # /* Golden Cove / Gracemont */
INTEL_FAM6_RAPTORLAKE = $(( 0 xB7 )) #
2019-11-24 19:25:56 +01:00
INTEL_FAM6_ATOM_BONNELL = $(( 0 x1C )) # /* Diamondville, Pineview */
INTEL_FAM6_ATOM_BONNELL_MID = $(( 0 x26 )) # /* Silverthorne, Lincroft */
INTEL_FAM6_ATOM_SALTWELL = $(( 0 x36 )) # /* Cedarview */
INTEL_FAM6_ATOM_SALTWELL_MID = $(( 0 x27 )) # /* Penwell */
INTEL_FAM6_ATOM_SALTWELL_TABLET = $(( 0 x35 )) # /* Cloverview */
INTEL_FAM6_ATOM_SILVERMONT = $(( 0 x37 )) # /* Bay Trail, Valleyview */
INTEL_FAM6_ATOM_SILVERMONT_D = $(( 0 x4D )) # /* Avaton, Rangely */
INTEL_FAM6_ATOM_SILVERMONT_MID = $(( 0 x4A )) # /* Merriefield */
INTEL_FAM6_ATOM_AIRMONT = $(( 0 x4C )) # /* Cherry Trail, Braswell */
INTEL_FAM6_ATOM_AIRMONT_MID = $(( 0 x5A )) # /* Moorefield */
INTEL_FAM6_ATOM_AIRMONT_NP = $(( 0 x75 )) # /* Lightning Mountain */
INTEL_FAM6_ATOM_GOLDMONT = $(( 0 x5C )) # /* Apollo Lake */
INTEL_FAM6_ATOM_GOLDMONT_D = $(( 0 x5F )) # /* Denverton */
INTEL_FAM6_ATOM_GOLDMONT_PLUS = $(( 0 x7A )) # /* Gemini Lake */
INTEL_FAM6_ATOM_TREMONT_D = $(( 0 x86 )) # /* Jacobsville */
INTEL_FAM6_ATOM_TREMONT = $(( 0 x96 )) # /* Elkhart Lake */
2022-03-20 12:09:29 +01:00
INTEL_FAM6_ATOM_TREMONT_L = $(( 0 x9C )) # /* Jasper Lake */
2019-11-24 19:25:56 +01:00
INTEL_FAM6_XEON_PHI_KNL = $(( 0 x57 )) # /* Knights Landing */
INTEL_FAM6_XEON_PHI_KNM = $(( 0 x85 )) # /* Knights Mill */
2018-01-31 14:58:54 +01:00
}
2018-02-02 11:10:36 +01:00
parse_cpu_details_done = 1
2018-01-31 13:00:58 +01:00
}
2019-01-20 19:32:36 +01:00
is_hygon( )
{
[ " $cpu_vendor " = HygonGenuine ] && return 0
return 1
}
2018-01-31 13:00:58 +01:00
2018-04-08 13:02:43 +02:00
is_amd( )
{
[ " $cpu_vendor " = AuthenticAMD ] && return 0
return 1
}
is_intel( )
{
[ " $cpu_vendor " = GenuineIntel ] && return 0
return 1
}
2018-04-08 16:24:43 +02:00
is_cpu_smt_enabled( )
{
# SMT / HyperThreading is enabled if siblings != cpucores
if [ -e " $procfs /cpuinfo " ] ; then
_siblings = $( awk '/^siblings/ {print $3;exit}' " $procfs /cpuinfo " )
_cpucores = $( awk '/^cpu cores/ {print $4;exit}' " $procfs /cpuinfo " )
if [ -n " $_siblings " ] && [ -n " $_cpucores " ] ; then
if [ " $_siblings " = " $_cpucores " ] ; then
return 1
else
return 0
fi
fi
fi
# we can't tell
return 2
}
2018-01-26 12:58:07 +01:00
is_ucode_blacklisted( )
{
2018-02-02 11:10:36 +01:00
parse_cpu_details
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# if it's not an Intel, don't bother: it's not blacklisted
2018-04-08 13:02:43 +02:00
is_intel || return 1
2018-01-26 12:58:07 +01:00
# it also needs to be family=6
2018-01-31 13:00:58 +01:00
[ " $cpu_family " = 6 ] || return 1
2018-01-26 12:58:07 +01:00
# now, check each known bad microcode
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# source: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/x86/kernel/cpu/intel.c#n105
2018-02-09 19:54:34 +01:00
# 2018-02-08 update: https://newsroom.intel.com/wp-content/uploads/sites/11/2018/02/microcode-update-guidance.pdf
2018-01-26 12:58:07 +01:00
# model,stepping,microcode
for tuple in \
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$INTEL_FAM6_KABYLAKE ,0x0B,0x80 \
$INTEL_FAM6_KABYLAKE ,0x0A,0x80 \
$INTEL_FAM6_KABYLAKE ,0x09,0x80 \
$INTEL_FAM6_KABYLAKE_L ,0x0A,0x80 \
$INTEL_FAM6_KABYLAKE_L ,0x09,0x80 \
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$INTEL_FAM6_SKYLAKE_X ,0x03,0x0100013e \
2018-02-14 14:13:59 +01:00
$INTEL_FAM6_SKYLAKE_X ,0x04,0x02000036 \
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$INTEL_FAM6_SKYLAKE_X ,0x04,0x0200003a \
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$INTEL_FAM6_SKYLAKE_X ,0x04,0x0200003c \
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$INTEL_FAM6_BROADWELL ,0x04,0x28 \
$INTEL_FAM6_BROADWELL_G ,0x01,0x1b \
$INTEL_FAM6_BROADWELL_D ,0x02,0x14 \
$INTEL_FAM6_BROADWELL_D ,0x03,0x07000011 \
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$INTEL_FAM6_BROADWELL_X ,0x01,0x0b000025 \
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$INTEL_FAM6_HASWELL_L ,0x01,0x21 \
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$INTEL_FAM6_HASWELL_G ,0x01,0x18 \
$INTEL_FAM6_HASWELL ,0x03,0x23 \
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$INTEL_FAM6_HASWELL_X ,0x02,0x3b \
$INTEL_FAM6_HASWELL_X ,0x04,0x10 \
$INTEL_FAM6_IVYBRIDGE_X ,0x04,0x42a \
$INTEL_FAM6_SANDYBRIDGE_X ,0x06,0x61b \
$INTEL_FAM6_SANDYBRIDGE_X ,0x07,0x712
2018-01-26 12:58:07 +01:00
do
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model = $( echo " $tuple " | cut -d, -f1)
stepping = $(( $( echo " $tuple " | cut -d, -f2) ))
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if [ " $cpu_model " = " $model " ] && [ " $cpu_stepping " = " $stepping " ] ; then
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ucode = $(( $( echo " $tuple " | cut -d, -f3) ))
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if [ " $cpu_ucode " = " $ucode " ] ; then
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_debug " is_ucode_blacklisted: we have a match! ( $cpu_model / $cpu_stepping / $cpu_ucode ) "
return 0
fi
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fi
done
2018-01-26 16:44:44 +01:00
_debug " is_ucode_blacklisted: no ( $cpu_model / $cpu_stepping / $cpu_ucode ) "
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return 1
}
2018-02-02 11:12:10 +01:00
is_skylake_cpu( )
{
# is this a skylake cpu?
# return 0 if yes, 1 otherwise
#if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
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# boot_cpu_data.x86 == 6) {
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# switch (boot_cpu_data.x86_model) {
# case INTEL_FAM6_SKYLAKE_MOBILE:
# case INTEL_FAM6_SKYLAKE_DESKTOP:
# case INTEL_FAM6_SKYLAKE_X:
# case INTEL_FAM6_KABYLAKE_MOBILE:
# case INTEL_FAM6_KABYLAKE_DESKTOP:
# return true;
parse_cpu_details
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is_intel || return 1
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[ " $cpu_family " = 6 ] || return 1
2019-11-24 19:25:56 +01:00
if [ " $cpu_model " = $INTEL_FAM6_SKYLAKE_L ] || \
[ " $cpu_model " = $INTEL_FAM6_SKYLAKE ] || \
[ " $cpu_model " = $INTEL_FAM6_SKYLAKE_X ] || \
[ " $cpu_model " = $INTEL_FAM6_KABYLAKE_L ] || \
[ " $cpu_model " = $INTEL_FAM6_KABYLAKE ] ; then
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return 0
fi
return 1
}
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is_vulnerable_to_empty_rsb( )
{
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if is_intel && [ -z " $capabilities_rsba " ] ; then
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_warn "is_vulnerable_to_empty_rsb() called before ARCH CAPABILITIES MSR was read"
fi
if is_skylake_cpu || [ " $capabilities_rsba " = 1 ] ; then
return 0
fi
return 1
}
2018-04-08 16:26:06 +02:00
is_zen_cpu( )
{
# is this CPU from the AMD ZEN family ? (ryzen, epyc, ...)
parse_cpu_details
is_amd || return 1
[ " $cpu_family " = 23 ] && return 0
return 1
}
2019-01-20 19:32:36 +01:00
is_moksha_cpu( )
{
parse_cpu_details
is_hygon || return 1
[ " $cpu_family " = 24 ] && return 0
return 1
}
2019-05-07 20:35:52 +02:00
# Test if the current host is a Xen PV Dom0 / DomU
is_xen( ) {
if [ ! -d " $procfs /xen " ] ; then
return 1
fi
# XXX do we have a better way that relying on dmesg?
dmesg_grep 'Booting paravirtualized kernel on Xen$' ; ret = $?
if [ $ret -eq 2 ] ; then
_warn "dmesg truncated, Xen detection will be unreliable. Please reboot and relaunch this script"
return 1
elif [ $ret -eq 0 ] ; then
return 0
else
return 1
fi
}
is_xen_dom0( )
{
if ! is_xen; then
return 1
fi
if [ -e " $procfs /xen/capabilities " ] && grep -q "control_d" " $procfs /xen/capabilities " ; then
return 0
else
return 1
fi
}
is_xen_domU( )
{
if ! is_xen; then
return 1
fi
# PVHVM guests also print 'Booting paravirtualized kernel', so we need this check.
dmesg_grep 'Xen HVM callback vector for event delivery is enabled$' ; ret = $?
if [ $ret -eq 0 ] ; then
return 1
fi
if ! is_xen_dom0; then
return 0
else
return 1
fi
}
2019-11-23 22:02:49 +01:00
builtin_dbversion = $( awk '/^# %%% MCEDB / { print $4 }' " $0 " )
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if [ -r " $mcedb_cache " ] ; then
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# we have a local cache file, but it might be older than the builtin version we have
local_dbversion = $( awk '/^# %%% MCEDB / { print $4 }' " $mcedb_cache " )
# sort -V sorts by version number
older_dbversion = $( printf "%b\n%b" " $local_dbversion " " $builtin_dbversion " | sort -V | head -n1)
if [ " $older_dbversion " = " $builtin_dbversion " ] ; then
mcedb_source = " $mcedb_cache "
mcedb_info = " local firmwares DB $local_dbversion "
fi
fi
# if mcedb_source is not set, either we don't have a local cached db, or it is older than the builtin db
2022-03-20 12:05:33 +01:00
if [ -z " ${ mcedb_source :- } " ] ; then
2018-09-23 17:29:14 +02:00
mcedb_source = " $0 "
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mcedb_info = " builtin firmwares DB $builtin_dbversion "
2018-09-23 17:29:14 +02:00
fi
read_mcedb( )
{
awk '{ if (DELIM==1) { print $2 } } /^# %%% MCEDB / { DELIM=1 }' " $mcedb_source "
}
2018-08-15 12:53:49 +02:00
is_latest_known_ucode( )
{
# 0: yes, 1: no, 2: unknown
parse_cpu_details
2018-09-24 20:25:52 +02:00
if [ " $cpu_cpuid " = 0 ] ; then
ucode_latest = "couldn't get your cpuid"
return 2
fi
2018-08-28 20:51:34 +02:00
ucode_latest = "latest microcode version for your CPU model is unknown"
2018-09-24 20:05:41 +02:00
if is_intel; then
cpu_brand_prefix = I
elif is_amd; then
cpu_brand_prefix = A
else
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return 2
fi
2018-09-24 20:05:41 +02:00
for tuple in $( read_mcedb | grep " $( printf " ^ $cpu_brand_prefix ,0x%08X, " " $cpu_cpuid " ) " )
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do
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ucode = $(( $( echo " $tuple " | cut -d, -f3) ))
ucode_date = $( echo " $tuple " | cut -d, -f4 | sed -r 's=(....)(..)(..)=\1/\2/\3=' )
_debug " is_latest_known_ucode: with cpuid $cpu_cpuid has ucode $cpu_ucode , last known is $ucode from $ucode_date "
ucode_latest = $( printf " latest version is 0x%x dated $ucode_date according to $mcedb_info " " $ucode " )
if [ " $cpu_ucode " -ge " $ucode " ] ; then
return 0
else
return 1
2018-08-15 12:53:49 +02:00
fi
done
_debug " is_latest_known_ucode: this cpuid is not referenced ( $cpu_cpuid ) "
return 2
}
2019-11-17 18:36:08 +01:00
get_cmdline( )
{
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if [ -n " ${ kernel_cmdline :- } " ] ; then
2019-11-17 18:36:08 +01:00
return
fi
2022-03-20 12:05:33 +01:00
if [ -n " ${ SMC_MOCK_CMDLINE :- } " ] ; then
2019-11-17 18:36:08 +01:00
mocked = 1
_debug " get_cmdline: using mocked cmdline ' $SMC_MOCK_CMDLINE ' "
kernel_cmdline = " $SMC_MOCK_CMDLINE "
return
else
2019-11-17 18:36:57 +01:00
kernel_cmdline = $( cat " $procfs /cmdline " )
2019-11-17 18:36:08 +01:00
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_CMDLINE=' $kernel_cmdline ' " )
fi
}
2018-03-25 12:23:46 +02:00
# ENTRYPOINT
# we can't do anything useful under WSL
if uname -a | grep -qE -- '-Microsoft #[0-9]+-Microsoft ' ; then
_warn "This script doesn't work under Windows Subsystem for Linux"
_warn "You should use the official Microsoft tool instead."
_warn "It can be found under https://aka.ms/SpeculationControlPS"
exit 1
fi
2021-05-24 22:39:47 +02:00
# or other UNIX-ish OSes non-Linux non-supported-BSDs
if [ " $os " = Darwin ] || [ " $os " = VMkernel ] ; then
_warn " You're running under the $os OS, but this script "
_warn "only works under Linux and some BSD systems, sorry."
_warn "Please read the README and FAQ for more information."
exit 1
fi
2018-01-09 10:32:51 +01:00
# check for mode selection inconsistency
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if [ " $opt_hw_only " = 1 ] ; then
2018-09-17 21:44:22 +02:00
if [ " $opt_cve_all " = 0 ] ; then
2018-03-25 12:48:37 +02:00
show_usage
echo " $0 : error: incompatible modes specified, --hw-only vs --variant " >& 2
exit 255
else
2018-09-17 21:44:22 +02:00
opt_cve_all = 0
opt_cve_list = ''
2018-03-25 12:48:37 +02:00
fi
fi
2018-01-09 10:32:51 +01:00
2018-01-16 10:33:01 +01:00
# coreos mode
if [ " $opt_coreos " = 1 ] ; then
if ! is_coreos; then
_warn "CoreOS mode asked, but we're not under CoreOS!"
exit 255
fi
_warn "CoreOS mode, starting an ephemeral toolbox to launch the script"
load_msr
load_cpuid
mount_debugfs
2018-01-29 10:29:48 +01:00
toolbox --ephemeral --bind-ro /dev/cpu:/dev/cpu -- sh -c " dnf install -y binutils which && /media/root $PWD / $0 $* --coreos-within-toolbox "
2018-01-16 10:33:01 +01:00
exitcode = $?
exit $exitcode
else
if is_coreos; then
_warn "You seem to be running CoreOS, you might want to use the --coreos option for better results"
_warn
fi
fi
2018-03-25 12:23:46 +02:00
# if we're under a BSD, try to mount linprocfs for "$procfs/cpuinfo"
procfs = /proc
if echo " $os " | grep -q BSD; then
_debug "We're under BSD, check if we have procfs"
procfs = $( mount | awk '/^linprocfs/ { print $3; exit; }' )
if [ -z " $procfs " ] ; then
_debug "we don't, try to mount it"
procfs = /proc
[ -d /compat/linux/proc ] && procfs = /compat/linux/proc
test -d $procfs || mkdir $procfs
if mount -t linprocfs linprocfs $procfs 2>/dev/null; then
mounted_procfs = 1
_debug " procfs just mounted at $procfs "
else
procfs = ''
fi
else
_debug " We do: $procfs "
fi
fi
2022-03-20 12:05:33 +01:00
# define a few vars we might reference later without these being inited
mockme = ''
mocked = 0
specex_knob_dir = /dev/no_valid_path
2018-01-31 13:00:58 +01:00
parse_cpu_details
2019-11-17 18:36:08 +01:00
get_cmdline
2022-03-20 11:04:57 +01:00
if [ " $opt_cpu " != all ] && [ " $opt_cpu " -gt " $max_core_id " ] ; then
echo " $0 : error: --cpu can't be higher than $max_core_id , got $opt_cpu " >& 2
exit 255
fi
2018-01-08 20:50:42 +01:00
if [ " $opt_live " = 1 ] ; then
2018-02-02 11:10:36 +01:00
# root check (only for live mode, for offline mode, we already checked if we could read the files)
2018-01-08 20:50:42 +01:00
if [ " $( id -u) " -ne 0 ] ; then
2018-01-09 13:37:26 +01:00
_warn "Note that you should launch this script with root privileges to get accurate information."
_warn "We'll proceed but you might see permission denied errors."
_warn " To run it as root, you can try the following command: sudo $0 "
_warn
2018-01-08 20:50:42 +01:00
fi
2018-01-23 20:25:24 +01:00
_info "Checking for vulnerabilities on current system"
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_info " Kernel is \033[35m $os $( uname -r) $( uname -v) $( uname -m) \033[0m "
2018-01-15 23:45:25 +01:00
_info " CPU is \033[35m $cpu_friendly_name \033[0m "
2018-01-08 20:50:42 +01:00
# try to find the image of the current running kernel
2019-11-17 14:29:32 +01:00
if [ -n " $opt_kernel " ] ; then
# specified by user on cmdline, with --live, don't override
:
2018-01-10 15:46:29 +01:00
# first, look for the BOOT_IMAGE hint in the kernel cmdline
2019-11-17 18:36:08 +01:00
elif echo " $kernel_cmdline " | grep -q 'BOOT_IMAGE=' ; then
opt_kernel = $( echo " $kernel_cmdline " | grep -Eo 'BOOT_IMAGE=[^ ]+' | cut -d= -f2)
2018-09-17 22:26:20 +02:00
_debug " found opt_kernel= $opt_kernel in $procfs /cmdline "
2018-08-09 14:00:35 +02:00
# if the boot partition is within a btrfs subvolume, strip the subvolume name
# if /boot is a separate subvolume, the remainder of the code in this section should handle it
if echo " $opt_kernel " | grep -q "^/@" ; then opt_kernel = $( echo " $opt_kernel " | sed "s:/@[^/]*::" ) ; fi
2018-01-10 15:46:29 +01:00
# if we have a dedicated /boot partition, our bootloader might have just called it /
# so try to prepend /boot and see if we find anything
2018-01-10 16:27:16 +01:00
[ -e " /boot/ $opt_kernel " ] && opt_kernel = " /boot/ $opt_kernel "
2018-01-16 10:33:01 +01:00
# special case for CoreOS if we're inside the toolbox
[ -e " /media/root/boot/ $opt_kernel " ] && opt_kernel = " /media/root/boot/ $opt_kernel "
2018-01-10 15:46:29 +01:00
_debug " opt_kernel is now $opt_kernel "
# else, the full path is already there (most probably /boot/something)
fi
# if we didn't find a kernel, default to guessing
if [ ! -e " $opt_kernel " ] ; then
2018-01-16 18:19:33 +01:00
# Fedora:
2018-01-29 10:29:48 +01:00
[ -e " /lib/modules/ $( uname -r) /vmlinuz " ] && opt_kernel = " /lib/modules/ $( uname -r) /vmlinuz "
2019-09-19 12:06:04 +02:00
# Slackware:
2018-01-29 10:29:48 +01:00
[ -e "/boot/vmlinuz" ] && opt_kernel = "/boot/vmlinuz"
2018-08-01 00:15:52 +02:00
# Arch aarch64:
[ -e "/boot/Image" ] && opt_kernel = "/boot/Image"
2018-08-09 22:13:30 +02:00
# Arch armv5/armv7:
[ -e "/boot/zImage" ] && opt_kernel = "/boot/zImage"
2018-09-29 11:35:10 +02:00
# Arch arm7:
[ -e "/boot/kernel7.img" ] && opt_kernel = "/boot/kernel7.img"
2018-01-16 18:19:33 +01:00
# Linux-Libre:
2018-01-29 10:29:48 +01:00
[ -e "/boot/vmlinuz-linux-libre" ] && opt_kernel = "/boot/vmlinuz-linux-libre"
2018-03-10 16:02:44 +01:00
# pine64
[ -e "/boot/pine64/Image" ] && opt_kernel = "/boot/pine64/Image"
2018-01-16 18:19:33 +01:00
# generic:
2018-01-29 10:29:48 +01:00
[ -e " /boot/vmlinuz- $( uname -r) " ] && opt_kernel = " /boot/vmlinuz- $( uname -r) "
[ -e " /boot/kernel- $( uname -r) " ] && opt_kernel = " /boot/kernel- $( uname -r) "
[ -e " /boot/bzImage- $( uname -r) " ] && opt_kernel = " /boot/bzImage- $( uname -r) "
2018-01-16 18:19:33 +01:00
# Gentoo:
2018-01-29 10:29:48 +01:00
[ -e " /boot/kernel-genkernel- $( uname -m) - $( uname -r) " ] && opt_kernel = " /boot/kernel-genkernel- $( uname -m) - $( uname -r) "
2018-01-16 18:19:33 +01:00
# NixOS:
2018-01-29 10:29:48 +01:00
[ -e "/run/booted-system/kernel" ] && opt_kernel = "/run/booted-system/kernel"
2018-02-10 02:01:23 +01:00
# systemd kernel-install:
[ -e "/etc/machine-id" ] && [ -e " /boot/ $( cat /etc/machine-id) / $( uname -r) /linux " ] && opt_kernel = " /boot/ $( cat /etc/machine-id) / $( uname -r) /linux "
2018-09-15 15:51:49 +02:00
# Clear Linux:
str_uname = $( uname -r)
2018-09-18 20:00:20 +02:00
clear_linux_kernel = " /lib/kernel/org.clearlinux. ${ str_uname ##*. } . ${ str_uname %.* } "
[ -e " $clear_linux_kernel " ] && opt_kernel = $clear_linux_kernel
2019-11-17 18:36:57 +01:00
# Custom Arch seems to have the kernel path in its cmdline in the form "\directory\kernelimage",
# with actual \'s instead of /'s:
custom_arch_kernel = $( echo " $kernel_cmdline " | grep -Eo "(^|\s)\\\\[\\\\a-zA-Z0-9_.-]+" | tr "\\\\" "/" | tr -d '[:space:]' )
if [ -n " $custom_arch_kernel " ] && [ -e " $custom_arch_kernel " ] ; then
opt_kernel = " $custom_arch_kernel "
fi
2020-02-06 19:54:27 +01:00
# FreeBSD:
[ -e "/boot/kernel/kernel" ] && opt_kernel = "/boot/kernel/kernel"
2018-01-10 15:46:29 +01:00
fi
2018-01-08 20:50:42 +01:00
# system.map
2019-11-17 14:29:32 +01:00
if [ -n " $opt_map " ] ; then
# specified by user on cmdline, with --live, don't override
:
elif [ -e " $procfs /kallsyms " ] ; then
2018-09-17 22:26:20 +02:00
opt_map = " $procfs /kallsyms "
2018-01-29 10:29:48 +01:00
elif [ -e " /lib/modules/ $( uname -r) /System.map " ] ; then
opt_map = " /lib/modules/ $( uname -r) /System.map "
elif [ -e " /boot/System.map- $( uname -r) " ] ; then
opt_map = " /boot/System.map- $( uname -r) "
2018-11-25 18:14:04 +01:00
elif [ -e " /lib/kernel/System.map- $( uname -r) " ] ; then
opt_map = " /lib/kernel/System.map- $( uname -r) "
2018-01-09 08:58:09 +01:00
fi
2018-01-08 20:50:42 +01:00
# config
2019-11-17 14:29:32 +01:00
if [ -n " $opt_config " ] ; then
# specified by user on cmdline, with --live, don't override
:
elif [ -e " $procfs /config.gz " ] ; then
2018-01-09 04:28:55 +01:00
dumped_config = " $( mktemp /tmp/config-XXXXXX) "
2018-09-17 22:26:20 +02:00
gunzip -c " $procfs /config.gz " > " $dumped_config "
2018-01-08 20:50:42 +01:00
# dumped_config will be deleted at the end of the script
2018-01-29 10:29:48 +01:00
opt_config = " $dumped_config "
elif [ -e " /lib/modules/ $( uname -r) /config " ] ; then
opt_config = " /lib/modules/ $( uname -r) /config "
elif [ -e " /boot/config- $( uname -r) " ] ; then
opt_config = " /boot/config- $( uname -r) "
2018-08-28 20:24:37 +02:00
elif [ -e " /etc/kernels/kernel-config- $( uname -m) - $( uname -r) " ] ; then
opt_config = " /etc/kernels/kernel-config- $( uname -m) - $( uname -r) "
2018-11-25 18:14:04 +01:00
elif [ -e " /lib/kernel/config- $( uname -r) " ] ; then
opt_config = " /lib/kernel/config- $( uname -r) "
2018-01-08 20:50:42 +01:00
fi
else
2018-01-09 13:37:26 +01:00
_info "Checking for vulnerabilities against specified kernel"
2018-02-02 11:10:36 +01:00
_info " CPU is \033[35m $cpu_friendly_name \033[0m "
2018-01-08 20:50:42 +01:00
fi
2018-01-13 13:59:17 +01:00
2018-01-08 20:50:42 +01:00
if [ -n " $opt_kernel " ] ; then
2018-04-01 17:29:12 +02:00
_verbose " Will use kernel image \033[35m $opt_kernel \033[0m "
2018-01-08 20:50:42 +01:00
else
2018-04-01 17:29:12 +02:00
_verbose "Will use no kernel image (accuracy might be reduced)"
2018-01-13 13:59:17 +01:00
bad_accuracy = 1
2018-01-08 20:50:42 +01:00
fi
2018-01-23 21:48:19 +01:00
2018-03-25 12:23:46 +02:00
if [ " $os " = Linux ] ; then
if [ -n " $opt_config " ] && ! grep -q '^CONFIG_' " $opt_config " ; then
# given file is invalid!
_warn "The kernel config file seems invalid, was expecting a plain-text file, ignoring it!"
opt_config = ''
fi
2018-01-23 21:48:19 +01:00
2022-03-20 12:05:33 +01:00
if [ -n " ${ dumped_config :- } " ] && [ -n " $opt_config " ] ; then
2018-09-17 22:26:20 +02:00
_verbose " Will use kconfig \033[35m $procfs /config.gz (decompressed)\033[0m "
2018-03-25 12:23:46 +02:00
elif [ -n " $opt_config " ] ; then
_verbose " Will use kconfig \033[35m $opt_config \033[0m "
else
_verbose "Will use no kconfig (accuracy might be reduced)"
bad_accuracy = 1
fi
2018-01-23 21:48:19 +01:00
2018-03-25 12:23:46 +02:00
if [ -n " $opt_map " ] ; then
_verbose " Will use System.map file \033[35m $opt_map \033[0m "
else
_verbose "Will use no System.map file (accuracy might be reduced)"
bad_accuracy = 1
fi
2018-01-13 13:59:17 +01:00
2022-03-20 12:05:33 +01:00
if [ " ${ bad_accuracy : =0 } " = 1 ] ; then
2018-11-25 18:37:03 +01:00
_warn "We're missing some kernel info (see -v), accuracy might be reduced"
2018-03-25 12:23:46 +02:00
fi
2018-01-08 20:50:42 +01:00
fi
if [ -e " $opt_kernel " ] ; then
2019-05-05 18:34:09 +02:00
if ! command -v " ${ opt_arch_prefix } readelf " >/dev/null 2>& 1; then
2018-01-16 10:33:01 +01:00
_debug "readelf not found"
2018-04-01 17:29:12 +02:00
kernel_err = " missing ' ${ opt_arch_prefix } readelf' tool, please install it, usually it's in the 'binutils' package "
2018-09-24 20:05:41 +02:00
elif [ " $opt_sysfs_only " = 1 ] || [ " $opt_hw_only " = 1 ] ; then
2018-04-01 17:29:12 +02:00
kernel_err = 'kernel image decompression skipped'
2018-01-08 20:50:42 +01:00
else
2018-04-01 17:29:12 +02:00
extract_kernel " $opt_kernel "
2018-01-08 20:50:42 +01:00
fi
else
2018-01-16 10:33:01 +01:00
_debug "no opt_kernel defined"
2018-04-01 17:29:12 +02:00
kernel_err = "couldn't find your kernel image in /boot, if you used netboot, this is normal"
2018-01-08 20:50:42 +01:00
fi
2018-04-01 17:29:12 +02:00
if [ -z " $kernel " ] || [ ! -r " $kernel " ] ; then
[ -z " $kernel_err " ] && kernel_err = " couldn't extract your kernel from $opt_kernel "
2018-02-02 11:13:54 +01:00
else
2018-03-25 13:42:06 +02:00
# vanilla kernels have with ^Linux version
# also try harder with some kernels (such as Red Hat) that don't have ^Linux version before their version string
# and check for FreeBSD
2018-04-01 17:29:12 +02:00
kernel_version = $( " ${ opt_arch_prefix } strings " " $kernel " 2>/dev/null | grep -E \
2018-03-25 13:42:06 +02:00
-e '^Linux version ' \
-e '^[[:alnum:]][^[:space:]]+ \([^[:space:]]+\) #[0-9]+ .+ (19|20)[0-9][0-9]$' \
-e '^FreeBSD [0-9]' | head -1)
2018-04-01 17:29:12 +02:00
if [ -z " $kernel_version " ] ; then
2018-03-17 16:02:11 +01:00
# try even harder with some kernels (such as ARM) that split the release (uname -r) and version (uname -v) in 2 adjacent strings
2018-04-01 17:29:12 +02:00
kernel_version = $( " ${ opt_arch_prefix } strings " " $kernel " 2>/dev/null | grep -E -B1 '^#[0-9]+ .+ (19|20)[0-9][0-9]$' | tr "\n" " " )
2018-03-17 16:02:11 +01:00
fi
2018-04-01 17:29:12 +02:00
if [ -n " $kernel_version " ] ; then
2018-02-02 11:13:54 +01:00
# in live mode, check if the img we found is the correct one
if [ " $opt_live " = 1 ] ; then
2018-04-01 17:29:12 +02:00
_verbose " Kernel image is \033[35m $kernel_version "
if ! echo " $kernel_version " | grep -qF " $( uname -r) " ; then
2019-09-19 12:06:04 +02:00
_warn " Possible discrepancy between your running kernel ' $( uname -r) ' and the image ' $kernel_version ' we found ( $opt_kernel ), results might be incorrect "
2018-02-02 11:13:54 +01:00
fi
2018-02-02 11:27:04 +01:00
else
2018-04-01 17:29:12 +02:00
_info " Kernel image is \033[35m $kernel_version "
2018-02-02 11:13:54 +01:00
fi
2018-03-10 14:56:10 +01:00
else
_verbose "Kernel image version is unknown"
2018-02-02 11:13:54 +01:00
fi
2018-01-08 11:31:19 +01:00
fi
2018-01-09 13:37:26 +01:00
_info
2018-01-08 12:14:12 +01:00
2018-01-10 12:24:16 +01:00
# end of header stuff
2018-01-07 16:16:11 +01:00
2018-01-10 12:24:16 +01:00
# now we define some util functions and the check_*() funcs, as
# the user can choose to execute only some of those
2018-01-11 12:23:16 +01:00
sys_interface_check( )
{
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file = " $1 "
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regex = " ${ 2 :- } "
mode = " ${ 3 :- } "
2019-05-23 14:27:50 +02:00
msg = ''
fullmsg = ''
2019-05-24 10:15:02 +02:00
if [ " $opt_live " = 1 ] && [ " $opt_no_sysfs " = 0 ] && [ -r " $file " ] ; then
:
else
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_SYSFS_ $( basename " $file " ) _RET=1 " )
return 1
fi
_mockvarname = " SMC_MOCK_SYSFS_ $( basename " $file " ) _RET "
2022-03-20 12:05:33 +01:00
# shellcheck disable=SC2086,SC1083
if [ -n " $( eval echo \$ { $_mockvarname :-} ) " ] ; then
2019-05-24 10:15:02 +02:00
_debug " sysfs: MOCKING enabled for $file func returns $( eval echo \$ $_mockvarname ) "
mocked = 1
return " $( eval echo \$ $_mockvarname ) "
fi
2018-09-17 21:44:22 +02:00
[ -n " $regex " ] || regex = '.*'
2019-05-23 14:26:40 +02:00
_mockvarname = " SMC_MOCK_SYSFS_ $( basename " $file " ) "
2022-03-20 12:05:33 +01:00
# shellcheck disable=SC2086,SC1083
if [ -n " $( eval echo \$ { $_mockvarname :-} ) " ] ; then
2019-05-23 14:26:40 +02:00
fullmsg = " $( eval echo \$ $_mockvarname ) "
msg = $( echo " $fullmsg " | grep -Eo " $regex " )
_debug " sysfs: MOCKING enabled for $file , will return $fullmsg "
mocked = 1
else
fullmsg = $( cat " $file " )
msg = $( grep -Eo " $regex " " $file " )
2019-05-24 10:15:02 +02:00
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_SYSFS_ $( basename " $file " ) =' $fullmsg ' " )
2019-05-23 14:26:40 +02:00
fi
2018-09-17 21:44:22 +02:00
if [ " $mode " = silent ] ; then
2019-05-23 14:27:50 +02:00
return 0
elif [ " $mode " = quiet ] ; then
_info " * Information from the /sys interface: $fullmsg "
2018-09-17 21:44:22 +02:00
return 0
fi
2018-01-21 18:02:11 +01:00
_info_nol "* Mitigated according to the /sys interface: "
2018-09-17 21:44:22 +02:00
if echo " $msg " | grep -qi '^not affected' ; then
2018-01-11 12:23:16 +01:00
# Not affected
status = OK
2019-05-15 00:21:08 +02:00
pstatus green YES " $fullmsg "
2019-11-24 19:25:56 +01:00
elif echo " $msg " | grep -qEi '^(kvm: )?mitigation' ; then
2018-01-11 12:23:16 +01:00
# Mitigation: PTI
status = OK
2019-05-15 00:21:08 +02:00
pstatus green YES " $fullmsg "
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elif echo " $msg " | grep -qi '^vulnerable' ; then
2018-01-11 12:23:16 +01:00
# Vulnerable
status = VULN
2019-05-15 00:21:08 +02:00
pstatus yellow NO " $fullmsg "
2018-01-11 12:23:16 +01:00
else
status = UNK
2019-05-15 00:21:08 +02:00
pstatus yellow UNKNOWN " $fullmsg "
2018-01-11 12:23:16 +01:00
fi
2018-09-17 21:44:22 +02:00
_debug " sys_interface_check: $file = $msg (re= $regex ) "
2018-01-11 12:23:16 +01:00
return 0
}
2019-05-24 10:15:02 +02:00
# write_msr
# param1 (mandatory): MSR, can be in hex or decimal.
# param2 (optional): CPU index, starting from 0. Default 0.
2022-03-20 11:04:57 +01:00
WRITE_MSR_RET_OK = 0
WRITE_MSR_RET_KO = 1
WRITE_MSR_RET_ERR = 2
WRITE_MSR_RET_LOCKDOWN = 3
2018-03-25 12:23:46 +02:00
write_msr( )
2018-03-17 17:17:15 +01:00
{
2022-03-20 11:04:57 +01:00
if [ " $opt_cpu " != all ] ; then
# we only have one core to write to, do it and return the result
write_msr_one_core $opt_cpu " $@ "
return $?
fi
# otherwise we must write on all cores
for _core in $( seq 0 $max_core_id ) ; do
write_msr_one_core " $_core " " $@ " ; ret = $?
if [ " $_core " = 0 ] ; then
# save the result of the first core, for comparison with the others
_first_core_ret = $ret
else
# compare first core with the other ones
if [ $_first_core_ret != $ret ] ; then
write_msr_msg = " result is not homogeneous between all cores, at least core 0 and $_core differ! "
return $WRITE_MSR_RET_ERR
fi
fi
done
# if we're here, all cores agree, return the result
return $ret
}
write_msr_one_core( )
{
_core = " $1 "
_msr_dec = $(( $2 ))
2019-05-24 10:15:02 +02:00
_msr = $( printf "0x%x" " $_msr_dec " )
2022-03-20 11:04:57 +01:00
write_msr_msg = 'unknown error'
2022-03-20 12:05:33 +01:00
: " ${ msr_locked_down : =0 } "
2019-05-24 10:15:02 +02:00
_mockvarname = " SMC_MOCK_WRMSR_ ${ _msr } _RET "
2022-03-20 12:05:33 +01:00
# shellcheck disable=SC2086,SC1083
if [ -n " $( eval echo \$ { $_mockvarname :-} ) " ] ; then
2019-05-24 10:15:02 +02:00
_debug " write_msr: MOCKING enabled for msr $_msr func returns $( eval echo \$ $_mockvarname ) "
mocked = 1
2022-03-20 11:04:57 +01:00
[ " $( eval echo \$ $_mockvarname ) " = $WRITE_MSR_RET_LOCKDOWN ] && msr_locked_down = 1
2019-05-24 10:15:02 +02:00
return " $( eval echo \$ $_mockvarname ) "
fi
2022-03-20 11:04:57 +01:00
if [ ! -e /dev/cpu/0/msr ] && [ ! -e /dev/cpuctl0 ] ; then
# try to load the module ourselves (and remember it so we can rmmod it afterwards)
load_msr
fi
if [ ! -e /dev/cpu/0/msr ] && [ ! -e /dev/cpuctl0 ] ; then
read_msr_msg = "is msr kernel module available?"
return $WRITE_MSR_RET_ERR
fi
2018-03-25 12:23:46 +02:00
if [ " $os " != Linux ] ; then
2022-03-20 11:04:57 +01:00
cpucontrol -m " $_msr =0 " " /dev/cpuctl $_core " >/dev/null 2>& 1; ret = $?
2018-03-25 12:23:46 +02:00
else
2018-08-08 16:52:31 +02:00
# for Linux
2018-03-25 12:23:46 +02:00
# convert to decimal
2022-03-20 11:04:57 +01:00
if [ ! -w /dev/cpu/" $_core " /msr ] ; then
write_msr_msg = " No write permission on /dev/cpu/ $_core /msr "
return $WRITE_MSR_RET_ERR
2018-08-08 16:52:31 +02:00
# if wrmsr is available, use it
2022-03-20 12:05:33 +01:00
elif command -v wrmsr >/dev/null 2>& 1 && [ " ${ SMC_NO_WRMSR :- } " != 1 ] ; then
2018-08-08 16:52:31 +02:00
_debug "write_msr: using wrmsr"
2019-05-24 10:15:02 +02:00
wrmsr $_msr_dec 0 2>/dev/null; ret = $?
2018-08-08 16:52:31 +02:00
# or if we have perl, use it, any 5.x version will work
2022-03-20 12:05:33 +01:00
elif command -v perl >/dev/null 2>& 1 && [ " ${ SMC_NO_PERL :- } " != 1 ] ; then
2018-08-08 16:52:31 +02:00
_debug "write_msr: using perl"
ret = 1
2022-03-20 11:04:57 +01:00
perl -e " open(M,'>','/dev/cpu/ $_core /msr') and seek(M, $_msr_dec ,0) and exit(syswrite(M,pack('H16',0))) " ; [ $? -eq 8 ] && ret = 0
2018-08-08 16:52:31 +02:00
# fallback to dd if it supports seek_bytes
2019-05-24 10:15:02 +02:00
elif dd if = /dev/null of = /dev/null bs = 8 count = 1 seek = " $_msr_dec " oflag = seek_bytes 2>/dev/null; then
2018-08-08 16:52:31 +02:00
_debug "write_msr: using dd"
2022-03-20 11:04:57 +01:00
dd if = /dev/zero of = /dev/cpu/" $_core " /msr bs = 8 count = 1 seek = " $_msr_dec " oflag = seek_bytes 2>/dev/null; ret = $?
2018-03-25 18:13:02 +02:00
else
2018-08-08 16:52:31 +02:00
_debug "write_msr: got no wrmsr, perl or recent enough dd!"
2022-03-20 11:04:57 +01:00
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_WRMSR_ ${ _msr } _RET= $WRITE_MSR_RET_ERR " )
write_msr_msg = "missing tool, install either msr-tools or perl"
return $WRITE_MSR_RET_ERR
2018-03-25 18:13:02 +02:00
fi
2019-12-06 23:03:36 +01:00
if [ " $ret " != 0 ] ; then
# * Fedora (and probably Red Hat) have a "kernel lock down" feature that prevents us to write to MSRs
2019-11-24 17:21:20 +01:00
# when this mode is enabled and EFI secure boot is enabled (see issue #303)
# https://src.fedoraproject.org/rpms/kernel/blob/master/f/efi-lockdown.patch
# when this happens, any write will fail and dmesg will have a msg printed "msr: Direct access to MSR"
2019-12-06 23:03:36 +01:00
# * A version of this patch also made it to vanilla in 5.4+, in that case the message is: 'raw MSR access is restricted'
# * we don't use dmesg_grep() because we don't care if dmesg is truncated here, as the message has just been printed
2019-11-24 17:21:20 +01:00
if dmesg | grep -qF "msr: Direct access to MSR" ; then
2019-12-06 23:03:36 +01:00
_debug "write_msr: locked down kernel detected (Red Hat / Fedora)"
2022-03-20 11:04:57 +01:00
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_WRMSR_ ${ _msr } _RET= $WRITE_MSR_RET_LOCKDOWN " )
2019-11-24 17:21:20 +01:00
msr_locked_down = 1
2022-03-20 11:04:57 +01:00
write_msr_msg = "your kernel is locked down (Fedora/Red Hat), please reboot without secure boot and retry"
return $WRITE_MSR_RET_LOCKDOWN
2019-12-06 23:03:36 +01:00
elif dmesg | grep -qF "raw MSR access is restricted" ; then
_debug "write_msr: locked down kernel detected (vanilla)"
2022-03-20 11:04:57 +01:00
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_WRMSR_ ${ _msr } _RET= $WRITE_MSR_RET_LOCKDOWN " )
2019-12-06 23:03:36 +01:00
msr_locked_down = 1
2022-03-20 11:04:57 +01:00
write_msr_msg = "your kernel is locked down, please reboot with lockdown=none in the kernel cmdline and retry"
return $WRITE_MSR_RET_LOCKDOWN
2019-11-24 17:21:20 +01:00
fi
fi
2018-03-25 12:23:46 +02:00
fi
2022-03-20 11:04:57 +01:00
2018-08-08 16:52:31 +02:00
# normalize ret
2022-03-20 11:04:57 +01:00
if [ " $ret " = 0 ] ; then
ret = $WRITE_MSR_RET_OK
else
ret = $WRITE_MSR_RET_KO
fi
_debug " write_msr: for cpu $_core on msr $_msr , ret= $ret "
2019-05-24 10:15:02 +02:00
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_WRMSR_ ${ _msr } _RET= $ret " )
2018-03-17 17:17:15 +01:00
return $ret
}
2019-05-24 10:15:02 +02:00
# read_msr
# param1 (mandatory): MSR, can be in hex or decimal.
# param2 (optional): CPU index, starting from 0. Default 0.
2022-03-19 18:39:10 +01:00
# returned data is available in $read_msr_value
2022-03-20 11:04:57 +01:00
READ_MSR_RET_OK = 0
READ_MSR_RET_KO = 1
READ_MSR_RET_ERR = 2
2018-03-17 17:17:15 +01:00
read_msr( )
{
2022-03-20 11:04:57 +01:00
if [ " $opt_cpu " != all ] ; then
# we only have one core to read, do it and return the result
read_msr_one_core $opt_cpu " $@ "
return $?
fi
# otherwise we must read all cores
for _core in $( seq 0 $max_core_id ) ; do
read_msr_one_core " $_core " " $@ " ; ret = $?
if [ " $_core " = 0 ] ; then
# save the result of the first core, for comparison with the others
_first_core_ret = $ret
_first_core_value = $read_msr_value
else
# compare first core with the other ones
if [ $_first_core_ret != $ret ] || [ " $_first_core_value " != " $read_msr_value " ] ; then
read_msr_msg = " result is not homogeneous between all cores, at least core 0 and $_core differ! "
return $READ_MSR_RET_ERR
fi
fi
done
# if we're here, all cores agree, return the result
return $ret
}
read_msr_one_core( )
{
_core = " $1 "
_msr_dec = $(( $2 ))
2019-05-24 10:15:02 +02:00
_msr = $( printf "0x%x" " $_msr_dec " )
2018-03-25 12:23:46 +02:00
read_msr_value = ''
2022-03-20 11:04:57 +01:00
read_msr_msg = 'unknown error'
2019-05-24 10:15:02 +02:00
_mockvarname = " SMC_MOCK_RDMSR_ ${ _msr } "
2022-03-20 12:05:33 +01:00
# shellcheck disable=SC2086,SC1083
if [ -n " $( eval echo \$ { $_mockvarname :-} ) " ] ; then
2019-05-23 14:26:40 +02:00
read_msr_value = " $( eval echo \$ $_mockvarname ) "
_debug " read_msr: MOCKING enabled for msr $_msr , returning $read_msr_value "
mocked = 1
2022-03-20 11:04:57 +01:00
return $READ_MSR_RET_OK
2019-05-24 10:15:02 +02:00
fi
_mockvarname = " SMC_MOCK_RDMSR_ ${ _msr } _RET "
2022-03-20 12:05:33 +01:00
# shellcheck disable=SC2086,SC1083
if [ -n " $( eval echo \$ { $_mockvarname :-} ) " ] && [ " $( eval echo \$ $_mockvarname ) " -ne 0 ] ; then
2019-05-24 10:15:02 +02:00
_debug " read_msr: MOCKING enabled for msr $_msr func returns $( eval echo \$ $_mockvarname ) "
mocked = 1
return " $( eval echo \$ $_mockvarname ) "
fi
2022-03-20 11:04:57 +01:00
if [ ! -e /dev/cpu/0/msr ] && [ ! -e /dev/cpuctl0 ] ; then
# try to load the module ourselves (and remember it so we can rmmod it afterwards)
load_msr
fi
if [ ! -e /dev/cpu/0/msr ] && [ ! -e /dev/cpuctl0 ] ; then
read_msr_msg = "is msr kernel module available?"
return $READ_MSR_RET_ERR
fi
2019-05-24 10:15:02 +02:00
if [ " $os " != Linux ] ; then
# for BSD
2022-03-20 11:04:57 +01:00
_msr = $( cpucontrol -m " $_msr " " /dev/cpuctl $_core " 2>/dev/null) ; ret = $?
2019-05-24 10:15:02 +02:00
if [ $ret -ne 0 ] ; then
2022-03-20 11:04:57 +01:00
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_RDMSR_ ${ _msr } _RET= $READ_MSR_RET_KO " )
return $READ_MSR_RET_KO
2019-05-24 10:15:02 +02:00
fi
2018-03-25 12:23:46 +02:00
# MSR 0x10: 0x000003e1 0xb106dded
_msr_h = $( echo " $_msr " | awk '{print $3}' ) ;
_msr_l = $( echo " $_msr " | awk '{print $4}' ) ;
2019-05-24 09:33:42 +02:00
read_msr_value = $(( _msr_h << 32 | _msr_l ))
2018-03-25 12:23:46 +02:00
else
2018-08-08 16:52:31 +02:00
# for Linux
2022-03-20 11:04:57 +01:00
if [ ! -r /dev/cpu/" $_core " /msr ] ; then
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_RDMSR_ ${ _msr } _RET= $READ_MSR_RET_ERR " )
read_msr_msg = " No read permission for /dev/cpu/ $_core /msr "
return $READ_MSR_RET_ERR
2018-08-08 16:52:31 +02:00
# if rdmsr is available, use it
2022-03-20 12:05:33 +01:00
elif command -v rdmsr >/dev/null 2>& 1 && [ " ${ SMC_NO_RDMSR :- } " != 1 ] ; then
2019-11-25 20:58:49 +01:00
_debug " read_msr: using rdmsr on $_msr "
2019-05-24 10:15:02 +02:00
read_msr_value = $( rdmsr -r $_msr_dec 2>/dev/null | od -t u8 -A n)
2018-08-08 16:52:31 +02:00
# or if we have perl, use it, any 5.x version will work
2022-03-20 12:05:33 +01:00
elif command -v perl >/dev/null 2>& 1 && [ " ${ SMC_NO_PERL :- } " != 1 ] ; then
2019-11-25 20:58:49 +01:00
_debug " read_msr: using perl on $_msr "
2022-03-20 11:04:57 +01:00
read_msr_value = $( perl -e " open(M,'<','/dev/cpu/ $_core /msr') and seek(M, $_msr_dec ,0) and read(M,\$_,8) and print " | od -t u8 -A n)
2018-08-08 16:52:31 +02:00
# fallback to dd if it supports skip_bytes
2019-05-24 10:15:02 +02:00
elif dd if = /dev/null of = /dev/null bs = 8 count = 1 skip = " $_msr_dec " iflag = skip_bytes 2>/dev/null; then
2019-11-25 20:58:49 +01:00
_debug " read_msr: using dd on $_msr "
2022-03-20 11:04:57 +01:00
read_msr_value = $( dd if = /dev/cpu/" $_core " /msr bs = 8 count = 1 skip = " $_msr_dec " iflag = skip_bytes 2>/dev/null | od -t u8 -A n)
2018-08-08 16:52:31 +02:00
else
_debug "read_msr: got no rdmsr, perl or recent enough dd!"
2022-03-20 11:04:57 +01:00
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_RDMSR_ ${ _msr } _RET= $READ_MSR_RET_ERR " )
read_msr_msg = 'missing tool, install either msr-tools or perl'
return $READ_MSR_RET_ERR
2018-03-25 18:13:02 +02:00
fi
2018-04-05 00:06:24 +02:00
if [ -z " $read_msr_value " ] ; then
# MSR doesn't exist, don't check for $? because some versions of dd still return 0!
2022-03-20 11:04:57 +01:00
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_RDMSR_ ${ _msr } _RET= $READ_MSR_RET_KO " )
return $READ_MSR_RET_KO
2018-03-25 12:23:46 +02:00
fi
2022-03-20 11:04:57 +01:00
# remove sparse spaces od might give us
read_msr_value = $(( read_msr_value ))
2018-03-25 12:23:46 +02:00
fi
2019-09-21 18:50:08 +02:00
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_RDMSR_ ${ _msr } =' $read_msr_value ' " )
2019-05-24 10:15:02 +02:00
_debug " read_msr: MSR= $_msr value is $read_msr_value "
2022-03-20 11:04:57 +01:00
return $READ_MSR_RET_OK
2018-03-17 17:17:15 +01:00
}
2018-01-24 14:44:16 +01:00
check_cpu( )
{
_info "\033[1;34mHardware check\033[0m"
2018-03-25 13:26:00 +02:00
if ! uname -m | grep -qwE 'x86_64|i[3-6]86|amd64' ; then
2018-03-17 16:13:37 +01:00
return
fi
2018-01-24 14:44:16 +01:00
_info "* Hardware support (CPU microcode) for mitigation techniques"
_info " * Indirect Branch Restricted Speculation (IBRS)"
_info_nol " * SPEC_CTRL MSR is available: "
2022-03-20 11:04:57 +01:00
# the new MSR 'SPEC_CTRL' is at offset 0x48
read_msr 0x48; ret = $?
if [ $ret = $READ_MSR_RET_OK ] ; then
spec_ctrl_msr = 1
pstatus green YES
elif [ $ret = $READ_MSR_RET_KO ] ; then
spec_ctrl_msr = 0
pstatus yellow NO
2018-01-24 14:44:16 +01:00
else
2022-03-20 11:04:57 +01:00
spec_ctrl_msr = -1
pstatus yellow UNKNOWN " $read_msr_msg "
2018-01-24 14:44:16 +01:00
fi
_info_nol " * CPU indicates IBRS capability: "
2018-01-31 13:54:59 +01:00
# from kernel src: { X86_FEATURE_SPEC_CTRL, CPUID_EDX,26, 0x00000007, 0 },
2018-04-08 14:41:08 +02:00
# amd: https://developer.amd.com/wp-content/resources/Architecture_Guidelines_Update_Indirect_Branch_Control.pdf
# amd: 8000_0008 EBX[14]=1
2022-03-20 12:05:33 +01:00
cpuid_ibrs = ''
2018-04-08 14:41:08 +02:00
if is_intel; then
2022-03-19 18:39:10 +01:00
read_cpuid 0x7 0x0 $EDX 26 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2018-04-08 14:41:08 +02:00
pstatus green YES "SPEC_CTRL feature bit"
cpuid_spec_ctrl = 1
cpuid_ibrs = 'SPEC_CTRL'
fi
2019-01-20 19:32:36 +01:00
elif is_amd || is_hygon; then
2022-03-19 18:39:10 +01:00
read_cpuid 0x80000008 0x0 $EBX 14 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2018-04-08 14:41:08 +02:00
pstatus green YES "IBRS_SUPPORT feature bit"
cpuid_ibrs = 'IBRS_SUPPORT'
fi
2018-01-24 14:44:16 +01:00
else
2022-03-20 00:08:17 +01:00
ret = invalid
pstatus yellow NO "unknown CPU"
2018-04-08 14:41:08 +02:00
fi
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_KO ] ; then
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_ERR ] ; then
pstatus yellow UNKNOWN " $read_cpuid_msg "
2018-04-08 14:41:08 +02:00
cpuid_spec_ctrl = -1
2018-01-24 14:44:16 +01:00
fi
2019-01-20 19:32:36 +01:00
if is_amd || is_hygon; then
2018-04-08 14:41:08 +02:00
_info_nol " * CPU indicates preferring IBRS always-on: "
2019-01-20 19:32:36 +01:00
# amd or hygon
2022-03-19 18:39:10 +01:00
read_cpuid 0x80000008 0x0 $EBX 16 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2018-04-08 14:41:08 +02:00
pstatus green YES
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_KO ] ; then
2018-04-08 14:41:08 +02:00
pstatus yellow NO
2022-03-20 00:08:17 +01:00
else
pstatus yellow UNKNOWN " $read_cpuid_msg "
2018-04-08 14:41:08 +02:00
fi
_info_nol " * CPU indicates preferring IBRS over retpoline: "
2019-01-20 19:32:36 +01:00
# amd or hygon
2022-03-19 18:39:10 +01:00
read_cpuid 0x80000008 0x0 $EBX 18 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2018-04-08 14:41:08 +02:00
pstatus green YES
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_KO ] ; then
2018-04-08 14:41:08 +02:00
pstatus yellow NO
2022-03-20 00:08:17 +01:00
else
pstatus yellow UNKNOWN " $read_cpuid_msg "
2018-01-24 14:44:16 +01:00
fi
fi
# IBPB
_info " * Indirect Branch Prediction Barrier (IBPB)"
_info_nol " * PRED_CMD MSR is available: "
2022-03-20 11:04:57 +01:00
# the new MSR 'PRED_CTRL' is at offset 0x49, write-only
write_msr 0x49; ret = $?
if [ $ret = $WRITE_MSR_RET_OK ] ; then
pstatus green YES
elif [ $ret = $WRITE_MSR_RET_KO ] ; then
pstatus yellow NO
2018-01-24 14:44:16 +01:00
else
2022-03-20 11:04:57 +01:00
pstatus yellow UNKNOWN " $write_msr_msg "
2018-01-24 14:44:16 +01:00
fi
_info_nol " * CPU indicates IBPB capability: "
2018-01-31 13:54:59 +01:00
# CPUID EAX=0x80000008, ECX=0x00 return EBX[12] indicates support for just IBPB.
2018-04-08 14:41:08 +02:00
if [ " $cpuid_spec_ctrl " = 1 ] ; then
# spec_ctrl implies ibpb
cpuid_ibpb = 'SPEC_CTRL'
2018-01-31 13:54:59 +01:00
pstatus green YES "SPEC_CTRL feature bit"
2018-04-08 14:41:08 +02:00
elif is_intel; then
if [ " $cpuid_spec_ctrl " = -1 ] ; then
pstatus yellow UNKNOWN "is cpuid kernel module available?"
else
pstatus yellow NO
fi
2019-01-20 19:32:36 +01:00
elif is_amd || is_hygon; then
2022-03-19 18:39:10 +01:00
read_cpuid 0x80000008 0x0 $EBX 12 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2018-04-08 14:41:08 +02:00
cpuid_ibpb = 'IBPB_SUPPORT'
pstatus green YES "IBPB_SUPPORT feature bit"
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_KO ] ; then
2018-04-08 14:41:08 +02:00
pstatus yellow NO
else
2022-03-20 00:08:17 +01:00
pstatus yellow UNKNOWN " $read_cpuid_msg "
2018-04-08 14:41:08 +02:00
fi
2018-01-24 14:44:16 +01:00
fi
# STIBP
_info " * Single Thread Indirect Branch Predictors (STIBP)"
_info_nol " * SPEC_CTRL MSR is available: "
if [ " $spec_ctrl_msr " = 1 ] ; then
pstatus green YES
elif [ " $spec_ctrl_msr " = 0 ] ; then
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2018-01-24 14:44:16 +01:00
else
2018-03-25 18:13:02 +02:00
pstatus yellow UNKNOWN "is msr kernel module available?"
2018-01-24 14:44:16 +01:00
fi
_info_nol " * CPU indicates STIBP capability: "
2018-04-08 14:41:08 +02:00
# intel: A processor supports STIBP if it enumerates CPUID (EAX=7H,ECX=0):EDX[27] as 1
# amd: 8000_0008 EBX[15]=1
if is_intel; then
2022-03-19 18:39:10 +01:00
read_cpuid 0x7 0x0 $EDX 27 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2018-04-08 14:41:08 +02:00
pstatus green YES "Intel STIBP feature bit"
#cpuid_stibp='Intel STIBP'
fi
elif is_amd; then
2022-03-19 18:39:10 +01:00
read_cpuid 0x80000008 0x0 $EBX 15 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2018-04-08 14:41:08 +02:00
pstatus green YES "AMD STIBP feature bit"
#cpuid_stibp='AMD STIBP'
fi
2019-01-20 19:32:36 +01:00
elif is_hygon; then
2022-03-19 18:39:10 +01:00
read_cpuid 0x80000008 0x0 $EBX 15 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2019-01-20 19:32:36 +01:00
pstatus green YES "HYGON STIBP feature bit"
#cpuid_stibp='HYGON STIBP'
fi
2018-01-24 14:44:16 +01:00
else
2022-03-20 00:08:17 +01:00
ret = invalid
2018-04-08 14:41:08 +02:00
pstatus yellow UNKNOWN "unknown CPU"
fi
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_KO ] ; then
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_ERR ] ; then
pstatus yellow UNKNOWN " $read_cpuid_msg "
2018-04-08 14:41:08 +02:00
fi
2019-01-20 19:32:36 +01:00
if is_amd || is_hygon; then
2018-04-08 14:41:08 +02:00
_info_nol " * CPU indicates preferring STIBP always-on: "
2022-03-19 18:39:10 +01:00
read_cpuid 0x80000008 0x0 $EBX 17 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2018-04-08 14:41:08 +02:00
pstatus green YES
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_KO ] ; then
2018-04-08 14:41:08 +02:00
pstatus yellow NO
2022-03-20 00:08:17 +01:00
else
pstatus yellow UNKNOWN " $read_cpuid_msg "
2018-04-08 14:41:08 +02:00
fi
2018-01-24 14:44:16 +01:00
fi
2018-05-21 22:01:27 +02:00
# variant 4
2018-05-23 22:50:52 +02:00
if is_intel; then
_info " * Speculative Store Bypass Disable (SSBD)"
_info_nol " * CPU indicates SSBD capability: "
2022-03-19 18:39:10 +01:00
read_cpuid 0x7 0x0 $EDX 31 1 1; ret24 = $? ; ret25 = $ret24
2022-03-20 00:08:17 +01:00
if [ $ret24 = $READ_CPUID_RET_OK ] ; then
2018-05-23 22:50:52 +02:00
cpuid_ssbd = 'Intel SSBD'
fi
elif is_amd; then
_info " * Speculative Store Bypass Disable (SSBD)"
_info_nol " * CPU indicates SSBD capability: "
2022-03-19 18:39:10 +01:00
read_cpuid 0x80000008 0x0 $EBX 24 1 1; ret24 = $?
read_cpuid 0x80000008 0x0 $EBX 25 1 1; ret25 = $?
2022-03-20 00:08:17 +01:00
if [ $ret24 = $READ_CPUID_RET_OK ] ; then
2018-05-23 22:50:52 +02:00
cpuid_ssbd = 'AMD SSBD in SPEC_CTRL'
#cpuid_ssbd_spec_ctrl=1
2022-03-20 00:08:17 +01:00
elif [ $ret25 = $READ_CPUID_RET_OK ] ; then
2018-05-23 22:50:52 +02:00
cpuid_ssbd = 'AMD SSBD in VIRT_SPEC_CTRL'
#cpuid_ssbd_virt_spec_ctrl=1
2018-05-23 23:08:07 +02:00
elif [ " $cpu_family " -ge 21 ] && [ " $cpu_family " -le 23 ] ; then
cpuid_ssbd = 'AMD non-architectural MSR'
2018-05-23 22:50:52 +02:00
fi
2019-01-20 19:32:36 +01:00
elif is_hygon; then
_info " * Speculative Store Bypass Disable (SSBD)"
_info_nol " * CPU indicates SSBD capability: "
2022-03-19 18:39:10 +01:00
read_cpuid 0x80000008 0x0 $EBX 24 1 1; ret24 = $?
read_cpuid 0x80000008 0x0 $EBX 25 1 1; ret25 = $?
2019-11-18 19:48:52 +01:00
2022-03-20 00:08:17 +01:00
if [ $ret24 = $READ_CPUID_RET_OK ] ; then
2019-01-20 19:32:36 +01:00
cpuid_ssbd = 'HYGON SSBD in SPEC_CTRL'
#hygon cpuid_ssbd_spec_ctrl=1
2022-03-20 00:08:17 +01:00
elif [ $ret25 = $READ_CPUID_RET_OK ] ; then
2019-01-20 19:32:36 +01:00
cpuid_ssbd = 'HYGON SSBD in VIRT_SPEC_CTRL'
#hygon cpuid_ssbd_virt_spec_ctrl=1
elif [ " $cpu_family " -ge 24 ] ; then
cpuid_ssbd = 'HYGON non-architectural MSR'
fi
2018-05-23 22:50:52 +02:00
fi
2022-03-20 12:05:33 +01:00
if [ -n " ${ cpuid_ssbd : = } " ] ; then
2018-05-23 22:50:52 +02:00
pstatus green YES " $cpuid_ssbd "
2022-03-20 00:08:17 +01:00
elif [ " $ret24 " = $READ_CPUID_RET_ERR ] && [ " $ret25 " = $READ_CPUID_RET_ERR ] ; then
pstatus yellow UNKNOWN " $read_cpuid_msg "
2018-05-23 22:50:52 +02:00
else
pstatus yellow NO
fi
2022-03-20 12:05:33 +01:00
amd_ssb_no = 0
hygon_ssb_no = 0
2018-05-23 22:50:52 +02:00
if is_amd; then
# similar to SSB_NO for intel
2022-03-19 18:39:10 +01:00
read_cpuid 0x80000008 0x0 $EBX 26 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2018-05-23 22:50:52 +02:00
amd_ssb_no = 1
2022-03-20 12:05:33 +01:00
elif [ $ret = $READ_CPUID_RET_ERR ] ; then
amd_ssb_no = -1
2018-05-23 22:50:52 +02:00
fi
2019-01-20 19:32:36 +01:00
elif is_hygon; then
# indicate when speculative store bypass disable is no longer needed to prevent speculative loads bypassing older stores
2022-03-19 18:39:10 +01:00
read_cpuid 0x80000008 0x0 $EBX 26 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2019-01-20 19:32:36 +01:00
hygon_ssb_no = 1
2022-03-20 12:05:33 +01:00
elif [ $ret = $READ_CPUID_RET_ERR ] ; then
hygon_ssb_no = -1
2019-01-20 19:32:36 +01:00
fi
2018-08-16 19:05:09 +02:00
fi
_info " * L1 data cache invalidation"
_info_nol " * FLUSH_CMD MSR is available: "
2022-03-20 11:04:57 +01:00
# the new MSR 'FLUSH_CMD' is at offset 0x10b, write-only
write_msr 0x10b; ret = $?
if [ $ret = $WRITE_MSR_RET_OK ] ; then
pstatus green YES
cpu_flush_cmd = 1
elif [ $ret = $WRITE_MSR_RET_KO ] ; then
pstatus yellow NO
2022-03-20 12:05:33 +01:00
cpu_flush_cmd = 0
2018-08-16 19:05:09 +02:00
else
2022-03-20 11:04:57 +01:00
pstatus yellow UNKNOWN " $write_msr_msg "
2022-03-20 12:05:33 +01:00
cpu_flush_cmd = -1
2018-05-21 22:01:27 +02:00
fi
2022-03-20 11:04:57 +01:00
2018-09-19 09:05:23 +02:00
# CPUID of L1D
_info_nol " * CPU indicates L1D flush capability: "
2022-03-19 18:39:10 +01:00
read_cpuid 0x7 0x0 $EDX 28 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2018-09-19 09:05:23 +02:00
pstatus green YES "L1D flush feature bit"
2019-11-24 17:21:20 +01:00
cpuid_l1df = 1
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_KO ] ; then
2018-09-19 09:05:23 +02:00
pstatus yellow NO
2022-03-20 12:05:33 +01:00
cpuid_l1df = 0
2022-03-20 00:08:17 +01:00
else
pstatus yellow UNKNOWN " $read_cpuid_msg "
2022-03-20 12:05:33 +01:00
cpuid_l1df = -1
2018-09-19 09:05:23 +02:00
fi
2018-05-21 22:01:27 +02:00
2019-05-14 20:30:47 +02:00
if is_intel; then
2022-03-19 18:39:10 +01:00
_info " * Microarchitectural Data Sampling"
2019-05-15 00:21:08 +02:00
_info_nol " * VERW instruction is available: "
2022-03-19 18:39:10 +01:00
read_cpuid 0x7 0x0 $EDX 10 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2019-05-15 00:21:08 +02:00
cpuid_md_clear = 1
pstatus green YES "MD_CLEAR feature bit"
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_KO ] ; then
2019-05-15 00:21:08 +02:00
cpuid_md_clear = 0
2019-05-14 20:30:47 +02:00
pstatus yellow NO
2022-03-20 00:08:17 +01:00
else
cpuid_md_clear = -1
pstatus yellow UNKNOWN " $read_cpuid_msg "
2019-05-14 20:30:47 +02:00
fi
fi
2022-03-19 18:39:44 +01:00
if is_intel; then
_info " * Indirect Branch Predictor Controls"
_info_nol " * Indirect Predictor Disable feature is available: "
read_cpuid 0x7 0x2 $EDX 1 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2022-03-19 18:39:44 +01:00
cpuid_ipred_ctrl = 1
pstatus green YES "IPRED_CTRL feature bit"
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_KO ] ; then
2022-03-19 18:39:44 +01:00
cpuid_ipred_ctrl = 0
pstatus yellow NO
2022-03-20 00:08:17 +01:00
else
cpuid_ipred_ctrl = -1
pstatus yellow UNKNOWN " $read_cpuid_msg "
2022-03-19 18:39:44 +01:00
fi
_info_nol " * Bottomless RSB Disable feature is available: "
read_cpuid 0x7 0x2 $EDX 2 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2022-03-19 18:39:44 +01:00
cpuid_rrsba = 1
pstatus green YES "RRSBA_CTRL feature bit"
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_KO ] ; then
2022-03-19 18:39:44 +01:00
cpuid_rrsba = 0
pstatus yellow NO
2022-03-20 00:08:17 +01:00
else
cpuid_rrsba = -1
pstatus yellow UNKNOWN " $read_cpuid_msg "
2022-03-19 18:39:44 +01:00
fi
_info_nol " * BHB-Focused Indirect Predictor Disable feature is available: "
read_cpuid 0x7 0x2 $EDX 2 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2022-03-19 18:39:44 +01:00
cpuid_bhi = 1
pstatus green YES "BHI_CTRL feature bit"
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_KO ] ; then
2022-03-19 18:39:44 +01:00
cpuid_bhi = 0
pstatus yellow NO
2022-03-20 00:08:17 +01:00
else
cpuid_bhi = -1
pstatus yellow UNKNOWN " $read_cpuid_msg "
2022-03-19 18:39:44 +01:00
fi
fi
2018-04-08 15:08:21 +02:00
if is_intel; then
_info " * Enhanced IBRS (IBRS_ALL)"
_info_nol " * CPU indicates ARCH_CAPABILITIES MSR availability: "
cpuid_arch_capabilities = -1
# A processor supports the ARCH_CAPABILITIES MSR if it enumerates CPUID (EAX=7H,ECX=0):EDX[29] as 1
2022-03-19 18:39:10 +01:00
read_cpuid 0x7 0x0 $EDX 29 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2018-04-08 15:08:21 +02:00
pstatus green YES
cpuid_arch_capabilities = 1
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_KO ] ; then
2018-04-08 15:08:21 +02:00
pstatus yellow NO
cpuid_arch_capabilities = 0
2022-03-20 00:08:17 +01:00
else
pstatus yellow UNKNOWN " $read_cpuid_msg "
2018-04-08 15:08:21 +02:00
fi
2018-01-24 14:44:16 +01:00
2018-04-08 15:08:21 +02:00
_info_nol " * ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: "
2019-11-12 18:30:36 +01:00
capabilities_taa_no = -1
2019-05-14 19:21:20 +02:00
capabilities_mds_no = -1
2018-04-08 15:08:21 +02:00
capabilities_rdcl_no = -1
capabilities_ibrs_all = -1
2018-08-09 21:03:58 +02:00
capabilities_rsba = -1
2018-09-29 13:16:07 +02:00
capabilities_l1dflush_no = -1
capabilities_ssb_no = -1
2019-11-24 19:25:56 +01:00
capabilities_pschange_msc_no = -1
2019-11-25 20:58:49 +01:00
capabilities_tsx_ctrl_msr = -1
2018-04-08 15:08:21 +02:00
if [ " $cpuid_arch_capabilities " = -1 ] ; then
pstatus yellow UNKNOWN
elif [ " $cpuid_arch_capabilities " != 1 ] ; then
capabilities_rdcl_no = 0
2019-11-12 18:30:36 +01:00
capabilities_taa_no = 0
2019-05-14 19:21:20 +02:00
capabilities_mds_no = 0
2018-04-08 15:08:21 +02:00
capabilities_ibrs_all = 0
2018-08-09 21:03:58 +02:00
capabilities_rsba = 0
2018-09-29 13:16:07 +02:00
capabilities_l1dflush_no = 0
capabilities_ssb_no = 0
2019-11-24 19:25:56 +01:00
capabilities_pschange_msc_no = 0
2019-11-25 20:58:49 +01:00
capabilities_tsx_ctrl_msr = 0
2018-04-08 15:08:21 +02:00
pstatus yellow NO
else
# the new MSR 'ARCH_CAPABILITIES' is at offset 0x10a
2022-03-20 11:04:57 +01:00
read_msr 0x10a; ret = $?
2018-04-08 15:08:21 +02:00
capabilities_rdcl_no = 0
2019-11-12 18:30:36 +01:00
capabilities_taa_no = 0
2019-05-14 19:21:20 +02:00
capabilities_mds_no = 0
2018-04-08 15:08:21 +02:00
capabilities_ibrs_all = 0
2018-08-09 21:03:58 +02:00
capabilities_rsba = 0
2018-09-29 13:16:07 +02:00
capabilities_l1dflush_no = 0
capabilities_ssb_no = 0
2019-11-24 19:25:56 +01:00
capabilities_pschange_msc_no = 0
2019-11-25 20:58:49 +01:00
capabilities_tsx_ctrl_msr = 0
2022-03-20 11:04:57 +01:00
if [ $ret = $READ_MSR_RET_OK ] ; then
capabilities = $read_msr_value
2019-11-25 20:58:49 +01:00
# https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/arch/x86/include/asm/msr-index.h#n82
2018-08-09 10:02:44 +02:00
_debug " capabilities MSR is $capabilities (decimal) "
[ $(( capabilities >> 0 & 1 )) -eq 1 ] && capabilities_rdcl_no = 1
[ $(( capabilities >> 1 & 1 )) -eq 1 ] && capabilities_ibrs_all = 1
2018-08-09 21:03:58 +02:00
[ $(( capabilities >> 2 & 1 )) -eq 1 ] && capabilities_rsba = 1
2018-09-29 13:16:07 +02:00
[ $(( capabilities >> 3 & 1 )) -eq 1 ] && capabilities_l1dflush_no = 1
2018-08-09 10:02:44 +02:00
[ $(( capabilities >> 4 & 1 )) -eq 1 ] && capabilities_ssb_no = 1
2019-05-14 19:21:20 +02:00
[ $(( capabilities >> 5 & 1 )) -eq 1 ] && capabilities_mds_no = 1
2019-11-24 19:25:56 +01:00
[ $(( capabilities >> 6 & 1 )) -eq 1 ] && capabilities_pschange_msc_no = 1
2019-11-25 20:58:49 +01:00
[ $(( capabilities >> 7 & 1 )) -eq 1 ] && capabilities_tsx_ctrl_msr = 1
2019-11-12 18:30:36 +01:00
[ $(( capabilities >> 8 & 1 )) -eq 1 ] && capabilities_taa_no = 1
2019-11-24 19:25:56 +01:00
_debug " capabilities says rdcl_no= $capabilities_rdcl_no ibrs_all= $capabilities_ibrs_all rsba= $capabilities_rsba l1dflush_no= $capabilities_l1dflush_no ssb_no= $capabilities_ssb_no mds_no= $capabilities_mds_no taa_no= $capabilities_taa_no pschange_msc_no= $capabilities_pschange_msc_no "
2018-04-08 15:08:21 +02:00
if [ " $capabilities_ibrs_all " = 1 ] ; then
2022-03-20 11:04:57 +01:00
pstatus green YES
2018-04-08 15:08:21 +02:00
else
pstatus yellow NO
2018-03-17 17:17:15 +01:00
fi
2022-03-20 11:04:57 +01:00
elif [ $ret = $READ_MSR_RET_KO ] ; then
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2022-03-20 11:04:57 +01:00
else
pstatus yellow UNKNOWN " $read_msr_msg "
2018-01-24 14:44:16 +01:00
fi
2018-04-08 15:08:21 +02:00
fi
2019-05-23 14:25:13 +02:00
_info_nol " * CPU explicitly indicates not being vulnerable to Meltdown/L1TF (RDCL_NO): "
2018-04-08 15:08:21 +02:00
if [ " $capabilities_rdcl_no " = -1 ] ; then
pstatus yellow UNKNOWN
elif [ " $capabilities_rdcl_no " = 1 ] ; then
pstatus green YES
2018-01-24 14:44:16 +01:00
else
2018-03-25 18:13:02 +02:00
pstatus yellow NO
2018-01-24 14:44:16 +01:00
fi
2018-05-21 22:01:27 +02:00
2018-09-29 13:16:07 +02:00
_info_nol " * CPU explicitly indicates not being vulnerable to Variant 4 (SSB_NO): "
if [ " $capabilities_ssb_no " = -1 ] ; then
pstatus yellow UNKNOWN
2019-01-20 19:32:36 +01:00
elif [ " $capabilities_ssb_no " = 1 ] || [ " $amd_ssb_no " = 1 ] || [ " $hygon_ssb_no " = 1 ] ; then
2018-09-29 13:16:07 +02:00
pstatus green YES
else
pstatus yellow NO
fi
2018-01-24 14:44:16 +01:00
2018-09-29 13:16:07 +02:00
_info_nol " * CPU/Hypervisor indicates L1D flushing is not necessary on this system: "
if [ " $capabilities_l1dflush_no " = -1 ] ; then
pstatus yellow UNKNOWN
elif [ " $capabilities_l1dflush_no " = 1 ] ; then
pstatus green YES
else
pstatus yellow NO
fi
_info_nol " * Hypervisor indicates host CPU might be vulnerable to RSB underflow (RSBA): "
if [ " $capabilities_rsba " = -1 ] ; then
pstatus yellow UNKNOWN
elif [ " $capabilities_rsba " = 1 ] ; then
pstatus yellow YES
else
pstatus blue NO
fi
2019-05-14 19:21:20 +02:00
2019-05-23 14:25:13 +02:00
_info_nol " * CPU explicitly indicates not being vulnerable to Microarchitectural Data Sampling (MDS_NO): "
2019-05-14 19:21:20 +02:00
if [ " $capabilities_mds_no " = -1 ] ; then
pstatus yellow UNKNOWN
elif [ " $capabilities_mds_no " = 1 ] ; then
pstatus green YES
else
pstatus yellow NO
2019-05-15 20:45:28 +02:00
fi
2019-11-12 18:30:36 +01:00
2019-11-24 19:25:56 +01:00
_info_nol " * CPU explicitly indicates not being vulnerable to TSX Asynchronous Abort (TAA_NO): "
2019-11-12 18:30:36 +01:00
if [ " $capabilities_taa_no " = -1 ] ; then
pstatus yellow UNKNOWN
elif [ " $capabilities_taa_no " = 1 ] ; then
pstatus green YES
else
pstatus yellow NO
fi
2019-11-24 19:25:56 +01:00
_info_nol " * CPU explicitly indicates not being vulnerable to iTLB Multihit (PSCHANGE_MSC_NO): "
if [ " $capabilities_pschange_msc_no " = -1 ] ; then
pstatus yellow UNKNOWN
elif [ " $capabilities_pschange_msc_no " = 1 ] ; then
pstatus green YES
else
pstatus yellow NO
fi
2019-11-25 20:58:49 +01:00
_info_nol " * CPU explicitly indicates having MSR for TSX control (TSX_CTRL_MSR): "
if [ " $capabilities_tsx_ctrl_msr " = -1 ] ; then
pstatus yellow UNKNOWN
elif [ " $capabilities_tsx_ctrl_msr " = 1 ] ; then
pstatus green YES
else
pstatus yellow NO
fi
if [ " $capabilities_tsx_ctrl_msr " = 1 ] ; then
2022-03-20 11:04:57 +01:00
read_msr 0x122; ret = $?
if [ " $ret " = $READ_MSR_RET_OK ] ; then
2019-11-25 20:58:49 +01:00
tsx_ctrl_msr = $read_msr_value
tsx_ctrl_msr_rtm_disable = $(( tsx_ctrl_msr >> 0 & 1 ))
tsx_ctrl_msr_cpuid_clear = $(( tsx_ctrl_msr >> 1 & 1 ))
fi
_info_nol " * TSX_CTRL MSR indicates TSX RTM is disabled: "
if [ " $tsx_ctrl_msr_rtm_disable " = 1 ] ; then
pstatus blue YES
elif [ " $tsx_ctrl_msr_rtm_disable " = 0 ] ; then
pstatus blue NO
else
pstatus yellow UNKNOWN "couldn't read MSR"
fi
_info_nol " * TSX_CTRL MSR indicates TSX CPUID bit is cleared: "
if [ " $tsx_ctrl_msr_cpuid_clear " = 1 ] ; then
pstatus blue YES
elif [ " $tsx_ctrl_msr_cpuid_clear " = 0 ] ; then
pstatus blue NO
else
pstatus yellow UNKNOWN "couldn't read MSR"
fi
fi
fi
_info_nol " * CPU supports Transactional Synchronization Extensions (TSX): "
2022-03-20 00:08:17 +01:00
ret = $READ_CPUID_RET_KO
2019-11-25 20:58:49 +01:00
cpuid_rtm = 0
if is_intel; then
2022-03-19 18:39:10 +01:00
read_cpuid 0x7 0x0 $EBX 11 1 1; ret = $?
2019-11-25 20:58:49 +01:00
fi
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2019-11-25 20:58:49 +01:00
cpuid_rtm = 1
2019-12-02 19:07:10 +01:00
pstatus green YES "RTM feature bit"
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_KO ] ; then
2019-11-25 20:58:49 +01:00
pstatus yellow NO
2022-03-20 00:08:17 +01:00
else
cpuid_rtm = -1
pstatus yellow UNKNOWN " $read_cpuid_msg "
2018-08-09 21:03:58 +02:00
fi
2018-09-17 21:44:22 +02:00
_info_nol " * CPU supports Software Guard Extensions (SGX): "
2022-03-20 00:08:17 +01:00
ret = $READ_CPUID_RET_KO
2018-09-17 21:44:22 +02:00
cpuid_sgx = 0
if is_intel; then
2022-03-19 18:39:10 +01:00
read_cpuid 0x7 0x0 $EBX 2 1 1; ret = $?
2018-09-17 21:44:22 +02:00
fi
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2018-09-17 21:44:22 +02:00
pstatus blue YES
cpuid_sgx = 1
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_KO ] ; then
2018-09-17 21:44:22 +02:00
pstatus green NO
2022-03-20 00:08:17 +01:00
else
cpuid_sgx = -1
pstatus yellow UNKNOWN " $read_cpuid_msg "
2018-09-17 21:44:22 +02:00
fi
2020-04-16 12:59:28 +02:00
_info_nol " * CPU supports Special Register Buffer Data Sampling (SRBDS): "
# A processor supports SRBDS if it enumerates CPUID (EAX=7H,ECX=0):EDX[9] as 1
# That means the mitigation disabling SRBDS exists
2022-03-20 00:08:17 +01:00
ret = $READ_CPUID_RET_KO
2020-04-16 12:59:28 +02:00
cpuid_srbds = 0
srbds_on = 0
if is_intel; then
2022-03-19 18:39:10 +01:00
read_cpuid 0x7 0x0 $EDX 9 1 1; ret = $?
2020-04-16 12:59:28 +02:00
fi
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
2020-04-16 12:59:28 +02:00
pstatus blue YES
cpuid_srbds = 1
2022-03-20 11:04:57 +01:00
read_msr 0x123; ret = $?
if [ $ret = $READ_MSR_RET_OK ] ; then
if [ $read_msr_value = 0 ] ; then
2020-04-16 12:59:28 +02:00
#SRBDS mitigation control exists and is enabled via microcode
srbds_on = 1
else
#SRBDS mitigation control exists but is disabled via microcode
srbds_on = 0
fi
else
srbds_on = -1
fi
2022-03-20 00:08:17 +01:00
elif [ $ret = $READ_CPUID_RET_KO ] ; then
2020-04-16 12:59:28 +02:00
pstatus green NO
2022-03-20 00:08:17 +01:00
else
pstatus yellow UNKNOWN " $read_cpuid_msg "
cpuid_srbds = 0
2020-04-16 12:59:28 +02:00
fi
2018-01-26 12:58:07 +01:00
_info_nol " * CPU microcode is known to cause stability problems: "
if is_ucode_blacklisted; then
2018-01-31 16:21:32 +01:00
pstatus red YES " $ucode_found "
2018-01-26 12:58:07 +01:00
_warn
_warn "The microcode your CPU is running on is known to cause instability problems,"
_warn "such as intempestive reboots or random crashes."
_warn "You are advised to either revert to a previous microcode version (that might not have"
_warn "the mitigations for Spectre), or upgrade to a newer one if available."
_warn
else
2018-02-16 10:34:01 +01:00
pstatus blue NO " $ucode_found "
2018-01-26 12:58:07 +01:00
fi
2018-08-15 12:53:49 +02:00
_info_nol " * CPU microcode is the latest known available version: "
is_latest_known_ucode; ret = $?
if [ $ret -eq 0 ] ; then
pstatus green YES " $ucode_latest "
elif [ $ret -eq 1 ] ; then
pstatus red NO " $ucode_latest "
else
pstatus blue UNKNOWN " $ucode_latest "
fi
2018-03-17 16:13:37 +01:00
}
2018-01-26 12:58:07 +01:00
2018-03-17 16:13:37 +01:00
check_cpu_vulnerabilities( )
{
2018-05-21 22:01:27 +02:00
_info "* CPU vulnerability to the speculative execution attack variants"
2018-09-17 21:44:22 +02:00
for cve in $supported_cve_list ; do
2020-11-10 18:52:54 +01:00
_info_nol " * Affected by $cve ( $( cve2name " $cve " ) ): "
2018-09-17 21:44:22 +02:00
if is_cpu_vulnerable " $cve " ; then
2018-03-25 18:13:02 +02:00
pstatus yellow YES
2018-01-24 14:44:16 +01:00
else
pstatus green NO
fi
done
}
2018-02-13 21:25:14 +01:00
check_redhat_canonical_spectre( )
{
# if we were already called, don't do it again
2022-03-20 12:05:33 +01:00
[ -n " ${ redhat_canonical_spectre :- } " ] && return
2018-02-13 21:25:14 +01:00
2019-05-05 18:34:09 +02:00
if ! command -v " ${ opt_arch_prefix } strings " >/dev/null 2>& 1; then
2018-02-13 21:25:14 +01:00
redhat_canonical_spectre = -1
2018-04-01 17:29:12 +02:00
elif [ -n " $kernel_err " ] ; then
2018-03-10 16:02:44 +01:00
redhat_canonical_spectre = -2
2018-02-13 21:25:14 +01:00
else
# Red Hat / Ubuntu specific variant1 patch is difficult to detect,
2018-03-24 23:58:13 +01:00
# let's use the two same tricks than the official Red Hat detection script uses:
2018-04-01 17:29:12 +02:00
if " ${ opt_arch_prefix } strings " " $kernel " | grep -qw noibrs && " ${ opt_arch_prefix } strings " " $kernel " | grep -qw noibpb; then
2018-03-24 23:58:13 +01:00
# 1) detect their specific variant2 patch. If it's present, it means
# that the variant1 patch is also present (both were merged at the same time)
2018-02-13 21:25:14 +01:00
_debug "found redhat/canonical version of the variant2 patch (implies variant1)"
redhat_canonical_spectre = 1
2018-04-01 17:29:12 +02:00
elif " ${ opt_arch_prefix } strings " " $kernel " | grep -q 'x86/pti:' ; then
2018-03-24 23:58:13 +01:00
# 2) detect their specific variant3 patch. If it's present, but the variant2
# is not, it means that only variant1 is present in addition to variant3
_debug "found redhat/canonical version of the variant3 patch (implies variant1 but not variant2)"
redhat_canonical_spectre = 2
2018-02-13 21:25:14 +01:00
else
redhat_canonical_spectre = 0
fi
fi
}
2019-11-24 19:25:56 +01:00
check_has_vmm( )
{
_info_nol "* This system is a host running a hypervisor: "
has_vmm = $opt_vmm
if [ " $has_vmm " = -1 ] && [ " $opt_paranoid " = 1 ] ; then
# In paranoid mode, if --vmm was not specified on the command-line,
# we want to be secure before everything else, so assume we're running
# a hypervisor, as this requires more mitigations
has_vmm = 2
elif [ " $has_vmm " = -1 ] ; then
# Here, we want to know if we are hosting a hypervisor, and running some VMs on it.
# If we find no evidence that this is the case, assume we're not (to avoid scaring users),
# this can always be overridden with --vmm in any case.
has_vmm = 0
if command -v pgrep >/dev/null 2>& 1; then
# remove xenbus and xenwatch, also present inside domU
# remove libvirtd as it can also be used to manage containers and not VMs
2019-12-09 23:17:37 +01:00
# for each binary we want to grep, get the pids
for _binary in qemu kvm xenstored xenconsoled
do
2021-05-25 08:14:22 +02:00
for _pid in $( pgrep -x $_binary )
2019-12-09 23:17:37 +01:00
do
# resolve the exe symlink, if it doesn't resolve with -m,
# which doesn't even need the dest to exist, it means the symlink
# is null, which is the case for kernel threads: ignore those to
# avoid false positives (such as [kvm-irqfd-clean] under at least RHEL 7.6/7.7)
if ! [ " $( readlink -m " /proc/ $_pid /exe " ) " = " /proc/ $_pid /exe " ] ; then
_debug " has_vmm: found PID $_pid "
has_vmm = 1
fi
done
done
unset _binary _pid
2019-11-24 19:25:56 +01:00
else
# ignore SC2009 as `ps ax` is actually used as a fallback if `pgrep` isn't installed
# shellcheck disable=SC2009
2022-03-20 12:05:33 +01:00
if command -v ps >/devnull && ps ax | grep -vw grep | grep -q -e '\<qemu' -e '/qemu' -e '<\kvm' -e '/kvm' -e '/xenstored' -e '/xenconsoled' ; then
2019-11-24 19:25:56 +01:00
has_vmm = 1
fi
fi
fi
if [ " $has_vmm " = 0 ] ; then
if [ " $opt_vmm " != -1 ] ; then
pstatus green NO "forced from command line"
else
pstatus green NO
fi
else
if [ " $opt_vmm " != -1 ] ; then
pstatus blue YES "forced from command line"
elif [ " $has_vmm " = 2 ] ; then
pstatus blue YES "paranoid mode"
else
pstatus blue YES
fi
fi
}
2018-01-10 12:24:16 +01:00
###################
2018-09-17 21:44:22 +02:00
# SPECTRE 1 SECTION
# bounds check bypass aka 'Spectre Variant 1'
check_CVE_2017_5753( )
2018-01-10 12:24:16 +01:00
{
2018-09-17 21:44:22 +02:00
cve = 'CVE-2017-5753'
_info " \033[1;34m $cve aka ' $( cve2name " $cve " ) '\033[0m "
2018-03-25 12:23:46 +02:00
if [ " $os " = Linux ] ; then
2018-09-17 21:44:22 +02:00
check_CVE_2017_5753_linux
2018-03-25 12:23:46 +02:00
elif echo " $os " | grep -q BSD; then
2018-09-17 21:44:22 +02:00
check_CVE_2017_5753_bsd
2018-03-25 12:23:46 +02:00
else
_warn " Unsupported OS ( $os ) "
fi
}
2018-01-10 12:24:16 +01:00
2018-09-17 21:44:22 +02:00
check_CVE_2017_5753_linux( )
2018-03-25 12:23:46 +02:00
{
2018-01-11 12:23:16 +01:00
status = UNK
sys_interface_available = 0
msg = ''
if sys_interface_check "/sys/devices/system/cpu/vulnerabilities/spectre_v1" ; then
# this kernel has the /sys interface, trust it over everything
2018-01-30 12:13:39 +01:00
# v0.33+: don't. some kernels have backported the array_index_mask_nospec() workaround without
# modifying the vulnerabilities/spectre_v1 file. that's bad. we can't trust it when it says Vulnerable :(
# see "silent backport" detection at the bottom of this func
2018-01-11 12:23:16 +01:00
sys_interface_available = 1
2018-01-30 12:13:39 +01:00
fi
if [ " $opt_sysfs_only " != 1 ] ; then
2018-01-11 12:23:16 +01:00
# no /sys interface (or offline mode), fallback to our own ways
2018-08-01 21:30:13 +02:00
_info_nol "* Kernel has array_index_mask_nospec: "
2018-01-30 12:13:39 +01:00
# vanilla: look for the Linus' mask aka array_index_mask_nospec()
# that is inlined at least in raw_copy_from_user (__get_user_X symbols)
#mov PER_CPU_VAR(current_task), %_ASM_DX
#cmp TASK_addr_limit(%_ASM_DX),%_ASM_AX
#jae bad_get_user
# /* array_index_mask_nospec() are the 2 opcodes that follow */
#+sbb %_ASM_DX, %_ASM_DX
#+and %_ASM_DX, %_ASM_AX
#ASM_STAC
# x86 64bits: jae(0x0f 0x83 0x?? 0x?? 0x?? 0x??) sbb(0x48 0x19 0xd2) and(0x48 0x21 0xd0)
# x86 32bits: cmp(0x3b 0x82 0x?? 0x?? 0x00 0x00) jae(0x73 0x??) sbb(0x19 0xd2) and(0x21 0xd0)
2018-08-01 21:30:13 +02:00
#
# arm32
##ifdef CONFIG_THUMB2_KERNEL
##define CSDB ".inst.w 0xf3af8014"
##else
##define CSDB ".inst 0xe320f014" e320f014
##endif
#asm volatile(
# "cmp %1, %2\n" e1500003
#" sbc %0, %1, %1\n" e0c03000
#CSDB
#: "=r" (mask)
#: "r" (idx), "Ir" (sz)
#: "cc");
#
# http://git.arm.linux.org.uk/cgit/linux-arm.git/commit/?h=spectre&id=a78d156587931a2c3b354534aa772febf6c9e855
2022-03-20 12:05:33 +01:00
v1_mask_nospec = ''
2018-04-01 17:29:12 +02:00
if [ -n " $kernel_err " ] ; then
pstatus yellow UNKNOWN " couldn't check ( $kernel_err ) "
2019-05-05 18:34:09 +02:00
elif ! command -v perl >/dev/null 2>& 1; then
2018-01-30 12:13:39 +01:00
pstatus yellow UNKNOWN "missing 'perl' binary, please install it"
2018-01-07 16:25:50 +01:00
else
2018-04-01 17:29:12 +02:00
perl -ne '/\x0f\x83....\x48\x19\xd2\x48\x21\xd0/ and $found++; END { exit($found) }' " $kernel " ; ret = $?
2018-01-30 12:13:39 +01:00
if [ $ret -gt 0 ] ; then
2018-08-01 21:30:13 +02:00
pstatus green YES " $ret occurrence(s) found of x86 64 bits array_index_mask_nospec() "
v1_mask_nospec = "x86 64 bits array_index_mask_nospec"
2018-01-10 12:24:16 +01:00
else
2018-04-01 17:29:12 +02:00
perl -ne '/\x3b\x82..\x00\x00\x73.\x19\xd2\x21\xd0/ and $found++; END { exit($found) }' " $kernel " ; ret = $?
2018-01-30 12:13:39 +01:00
if [ $ret -gt 0 ] ; then
2018-08-01 21:30:13 +02:00
pstatus green YES " $ret occurrence(s) found of x86 32 bits array_index_mask_nospec() "
v1_mask_nospec = "x86 32 bits array_index_mask_nospec"
2018-01-30 12:13:39 +01:00
else
2019-11-24 22:45:38 +01:00
ret = $( " ${ opt_arch_prefix } objdump " $objdump_options " $kernel " | grep -w -e f3af8014 -e e320f014 -B2 | grep -B1 -w sbc | grep -w -c cmp)
2018-08-01 21:30:13 +02:00
if [ " $ret " -gt 0 ] ; then
pstatus green YES " $ret occurrence(s) found of arm 32 bits array_index_mask_nospec() "
v1_mask_nospec = "arm 32 bits array_index_mask_nospec"
else
pstatus yellow NO
fi
2018-01-30 12:13:39 +01:00
fi
fi
fi
2018-02-13 21:25:14 +01:00
_info_nol "* Kernel has the Red Hat/Ubuntu patch: "
check_redhat_canonical_spectre
if [ " $redhat_canonical_spectre " = -1 ] ; then
2018-03-17 13:17:10 +01:00
pstatus yellow UNKNOWN " missing ' ${ opt_arch_prefix } strings' tool, please install it, usually it's in the binutils package "
2018-03-10 16:02:44 +01:00
elif [ " $redhat_canonical_spectre " = -2 ] ; then
2018-04-01 17:29:12 +02:00
pstatus yellow UNKNOWN " couldn't check ( $kernel_err ) "
2018-02-13 21:25:14 +01:00
elif [ " $redhat_canonical_spectre " = 1 ] ; then
pstatus green YES
2018-03-24 23:58:13 +01:00
elif [ " $redhat_canonical_spectre " = 2 ] ; then
pstatus green YES "but without IBRS"
2018-02-13 21:25:14 +01:00
else
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2018-02-13 21:25:14 +01:00
fi
2018-08-01 21:30:13 +02:00
_info_nol "* Kernel has mask_nospec64 (arm64): "
2018-04-03 15:52:25 +02:00
#.macro mask_nospec64, idx, limit, tmp
#sub \tmp, \idx, \limit
#bic \tmp, \tmp, \idx
#and \idx, \idx, \tmp, asr #63
#csdb
#.endm
#$ aarch64-linux-gnu-objdump -d vmlinux | grep -w bic -A1 -B1 | grep -w sub -A2 | grep -w and -B2
#ffffff8008082e44: cb190353 sub x19, x26, x25
#ffffff8008082e48: 8a3a0273 bic x19, x19, x26
#ffffff8008082e4c: 8a93ff5a and x26, x26, x19, asr #63
#ffffff8008082e50: d503229f hint #0x14
2018-04-17 18:50:32 +02:00
# /!\ can also just be "csdb" instead of "hint #0x14" for native objdump
#
2018-04-03 15:52:25 +02:00
# if we have v1_mask_nospec or redhat_canonical_spectre>0, don't bother disassembling the kernel, the answer is no.
if [ -n " $v1_mask_nospec " ] || [ " $redhat_canonical_spectre " -gt 0 ] ; then
pstatus yellow NO
elif [ -n " $kernel_err " ] ; then
pstatus yellow UNKNOWN " couldn't check ( $kernel_err ) "
2019-05-05 18:34:09 +02:00
elif ! command -v perl >/dev/null 2>& 1; then
2018-04-03 15:52:25 +02:00
pstatus yellow UNKNOWN "missing 'perl' binary, please install it"
2019-05-05 18:34:09 +02:00
elif ! command -v " ${ opt_arch_prefix } objdump " >/dev/null 2>& 1; then
2018-04-03 15:52:25 +02:00
pstatus yellow UNKNOWN " missing ' ${ opt_arch_prefix } objdump' tool, please install it, usually it's in the binutils package "
else
2019-11-24 22:45:38 +01:00
" ${ opt_arch_prefix } objdump " $objdump_options " $kernel " | perl -ne 'push @r, $_; /\s(hint|csdb)\s/ && $r[0]=~/\ssub\s+(x\d+)/ && $r[1]=~/\sbic\s+$1,\s+$1,/ && $r[2]=~/\sand\s/ && exit(9); shift @r if @r>3' ; ret = $?
2018-04-03 15:52:25 +02:00
if [ " $ret " -eq 9 ] ; then
pstatus green YES "mask_nospec64 macro is present and used"
2018-08-01 21:30:13 +02:00
v1_mask_nospec = "arm64 mask_nospec64"
2018-04-03 15:52:25 +02:00
else
pstatus yellow NO
fi
fi
2019-11-23 18:01:36 +01:00
_info_nol "* Kernel has array_index_nospec (arm64): "
# in 4.19+ kernels, the mask_nospec64 asm64 macro is replaced by array_index_nospec, defined in nospec.h, and used in invoke_syscall()
# ffffff8008090a4c: 2a0203e2 mov w2, w2
# ffffff8008090a50: eb0200bf cmp x5, x2
# ffffff8008090a54: da1f03e2 ngc x2, xzr
# ffffff8008090a58: d503229f hint #0x14
# /!\ can also just be "csdb" instead of "hint #0x14" for native objdump
#
# if we have v1_mask_nospec or redhat_canonical_spectre>0, don't bother disassembling the kernel, the answer is no.
if [ -n " $v1_mask_nospec " ] || [ " $redhat_canonical_spectre " -gt 0 ] ; then
pstatus yellow NO
elif [ -n " $kernel_err " ] ; then
pstatus yellow UNKNOWN " couldn't check ( $kernel_err ) "
elif ! command -v perl >/dev/null 2>& 1; then
pstatus yellow UNKNOWN "missing 'perl' binary, please install it"
elif ! command -v " ${ opt_arch_prefix } objdump " >/dev/null 2>& 1; then
pstatus yellow UNKNOWN " missing ' ${ opt_arch_prefix } objdump' tool, please install it, usually it's in the binutils package "
else
" ${ opt_arch_prefix } objdump " -d " $kernel " | perl -ne 'push @r, $_; /\s(hint|csdb)\s/ && $r[0]=~/\smov\s+(w\d+),\s+(w\d+)/ && $r[1]=~/\scmp\s+(x\d+),\s+(x\d+)/ && $r[2]=~/\sngc\s+$2,/ && exit(9); shift @r if @r>3' ; ret = $?
if [ " $ret " -eq 9 ] ; then
pstatus green YES "array_index_nospec macro is present and used"
v1_mask_nospec = "arm64 array_index_nospec"
else
pstatus yellow NO
fi
fi
2019-05-05 18:34:09 +02:00
if [ " $opt_verbose " -ge 2 ] || { [ -z " $v1_mask_nospec " ] && [ " $redhat_canonical_spectre " != 1 ] && [ " $redhat_canonical_spectre " != 2 ] ; } ; then
2018-01-30 12:13:39 +01:00
# this is a slow heuristic and we don't need it if we already know the kernel is patched
# but still show it in verbose mode
2018-02-04 17:01:35 +01:00
_info_nol "* Checking count of LFENCE instructions following a jump in kernel... "
2018-04-01 17:29:12 +02:00
if [ -n " $kernel_err " ] ; then
pstatus yellow UNKNOWN " couldn't check ( $kernel_err ) "
2018-01-30 12:13:39 +01:00
else
2019-05-05 18:34:09 +02:00
if ! command -v " ${ opt_arch_prefix } objdump " >/dev/null 2>& 1; then
2018-03-17 13:17:10 +01:00
pstatus yellow UNKNOWN " missing ' ${ opt_arch_prefix } objdump' tool, please install it, usually it's in the binutils package "
2018-01-11 12:23:16 +01:00
else
2018-01-30 12:13:39 +01:00
# here we disassemble the kernel and count the number of occurrences of the LFENCE opcode
# in non-patched kernels, this has been empirically determined as being around 40-50
# in patched kernels, this is more around 70-80, sometimes way higher (100+)
# v0.13: 68 found in a 3.10.23-xxxx-std-ipv6-64 (with lots of modules compiled-in directly), which doesn't have the LFENCE patches,
# so let's push the threshold to 70.
2018-01-30 22:59:44 +01:00
# v0.33+: now only count lfence opcodes after a jump, way less error-prone
# non patched kernel have between 0 and 20 matches, patched ones have at least 40-45
2019-11-24 22:45:38 +01:00
nb_lfence = $( " ${ opt_arch_prefix } objdump " $objdump_options " $kernel " 2>/dev/null | grep -w -B1 lfence | grep -Ewc 'jmp|jne|je' )
2018-01-30 22:59:44 +01:00
if [ " $nb_lfence " -lt 30 ] ; then
2018-03-25 13:42:06 +02:00
pstatus yellow NO " only $nb_lfence jump-then-lfence instructions found, should be >= 30 (heuristic) "
2018-01-30 12:13:39 +01:00
else
v1_lfence = 1
2018-01-30 22:59:44 +01:00
pstatus green YES " $nb_lfence jump-then-lfence instructions found, which is >= 30 (heuristic) "
2018-01-30 12:13:39 +01:00
fi
2018-01-11 12:23:16 +01:00
fi
2018-01-10 12:24:16 +01:00
fi
2018-01-07 16:25:50 +01:00
fi
2018-01-30 12:13:39 +01:00
2018-01-21 18:02:11 +01:00
else
# we have no sysfs but were asked to use it only!
msg = "/sys vulnerability interface use forced, but it's not available!"
status = UNK
2018-01-07 16:16:11 +01:00
fi
2018-01-30 12:13:39 +01:00
# report status
2018-09-17 21:44:22 +02:00
if ! is_cpu_vulnerable " $cve " ; then
2018-01-11 12:23:16 +01:00
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2018-01-30 12:13:39 +01:00
elif [ -z " $msg " ] ; then
# if msg is empty, sysfs check didn't fill it, rely on our own test
2018-04-03 15:52:25 +02:00
if [ -n " $v1_mask_nospec " ] ; then
pvulnstatus $cve OK " Kernel source has been patched to mitigate the vulnerability ( $v1_mask_nospec ) "
2018-03-24 23:58:13 +01:00
elif [ " $redhat_canonical_spectre " = 1 ] || [ " $redhat_canonical_spectre " = 2 ] ; then
2018-02-13 21:25:14 +01:00
pvulnstatus $cve OK "Kernel source has been patched to mitigate the vulnerability (Red Hat/Ubuntu patch)"
2018-01-30 12:13:39 +01:00
elif [ " $v1_lfence " = 1 ] ; then
2018-01-30 22:59:44 +01:00
pvulnstatus $cve OK "Kernel source has PROBABLY been patched to mitigate the vulnerability (jump-then-lfence instructions heuristic)"
2019-05-05 18:34:09 +02:00
elif [ -n " $kernel_err " ] ; then
2018-01-30 12:13:39 +01:00
pvulnstatus $cve UNK "Couldn't find kernel image or tools missing to execute the checks"
2018-04-05 00:03:04 +02:00
explain "Re-run this script with root privileges, after installing the missing tools indicated above"
2018-01-30 12:13:39 +01:00
else
pvulnstatus $cve VULN "Kernel source needs to be patched to mitigate the vulnerability"
2018-04-05 00:03:04 +02:00
explain "Your kernel is too old to have the mitigation for Variant 1, you should upgrade to a newer kernel. If you're using a Linux distro and didn't compile the kernel yourself, you should upgrade your distro to get a newer kernel."
2018-01-30 12:13:39 +01:00
fi
else
2018-04-03 15:52:25 +02:00
if [ " $msg " = "Vulnerable" ] && [ -n " $v1_mask_nospec " ] ; then
2018-01-30 12:13:39 +01:00
pvulnstatus $cve OK "Kernel source has been patched to mitigate the vulnerability (silent backport of array_index_mask_nospec)"
else
2018-04-05 00:03:04 +02:00
if [ " $msg " = "Vulnerable" ] ; then
msg = "Kernel source needs to be patched to mitigate the vulnerability"
_explain = "Your kernel is too old to have the mitigation for Variant 1, you should upgrade to a newer kernel. If you're using a Linux distro and didn't compile the kernel yourself, you should upgrade your distro to get a newer kernel."
fi
2018-01-30 12:13:39 +01:00
pvulnstatus $cve " $status " " $msg "
2022-03-20 12:05:33 +01:00
[ -n " ${ _explain :- } " ] && explain " $_explain "
2018-04-05 00:03:04 +02:00
unset _explain
2018-01-30 12:13:39 +01:00
fi
2018-01-07 15:00:59 +01:00
fi
2018-01-10 12:24:16 +01:00
}
2018-01-07 15:00:59 +01:00
2018-09-17 21:44:22 +02:00
check_CVE_2017_5753_bsd( )
2018-03-25 12:23:46 +02:00
{
2018-09-17 21:44:22 +02:00
if ! is_cpu_vulnerable " $cve " ; then
2018-03-25 12:23:46 +02:00
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2018-03-25 12:23:46 +02:00
else
pvulnstatus $cve VULN "no mitigation for BSD yet"
fi
}
2018-01-10 12:24:16 +01:00
###################
2018-09-17 21:44:22 +02:00
# SPECTRE 2 SECTION
# branch target injection aka 'Spectre Variant 2'
check_CVE_2017_5715( )
2018-01-10 12:24:16 +01:00
{
2018-09-17 21:44:22 +02:00
cve = 'CVE-2017-5715'
_info " \033[1;34m $cve aka ' $( cve2name " $cve " ) '\033[0m "
2018-03-25 12:23:46 +02:00
if [ " $os " = Linux ] ; then
2018-09-17 21:44:22 +02:00
check_CVE_2017_5715_linux
2018-03-25 12:23:46 +02:00
elif echo " $os " | grep -q BSD; then
2018-09-17 21:44:22 +02:00
check_CVE_2017_5715_bsd
2018-03-25 12:23:46 +02:00
else
_warn " Unsupported OS ( $os ) "
fi
}
2018-01-11 12:23:16 +01:00
2018-09-17 21:44:22 +02:00
check_CVE_2017_5715_linux( )
2018-03-25 12:23:46 +02:00
{
2018-01-11 12:23:16 +01:00
status = UNK
sys_interface_available = 0
msg = ''
if sys_interface_check "/sys/devices/system/cpu/vulnerabilities/spectre_v2" ; then
# this kernel has the /sys interface, trust it over everything
sys_interface_available = 1
2018-01-21 18:02:11 +01:00
fi
if [ " $opt_sysfs_only " != 1 ] ; then
2018-04-05 00:00:07 +02:00
_info "* Mitigation 1"
2018-01-23 22:20:34 +01:00
ibrs_can_tell = 0
2018-04-05 00:00:07 +02:00
ibrs_supported = ''
ibrs_enabled = ''
ibpb_can_tell = 0
ibpb_supported = ''
ibpb_enabled = ''
2018-01-21 13:48:05 +01:00
2018-01-11 12:23:16 +01:00
if [ " $opt_live " = 1 ] ; then
2018-04-05 00:00:07 +02:00
# in live mode, we can check for the ibrs_enabled file in debugfs
# all versions of the patches have it (NOT the case of IBPB or KPTI)
2018-01-23 22:20:34 +01:00
ibrs_can_tell = 1
2018-01-11 12:23:16 +01:00
mount_debugfs
2018-01-21 13:48:05 +01:00
for dir in \
/sys/kernel/debug \
/sys/kernel/debug/x86 \
2018-09-17 22:26:20 +02:00
" $procfs /sys/kernel " ; do
2018-01-21 13:48:05 +01:00
if [ -e " $dir /ibrs_enabled " ] ; then
2018-01-11 12:23:16 +01:00
# if the file is there, we have IBRS compiled-in
# /sys/kernel/debug/ibrs_enabled: vanilla
2018-02-13 21:25:14 +01:00
# /sys/kernel/debug/x86/ibrs_enabled: Red Hat (see https://access.redhat.com/articles/3311301)
2018-01-11 12:23:16 +01:00
# /proc/sys/kernel/ibrs_enabled: OpenSUSE tumbleweed
2018-04-05 00:00:07 +02:00
specex_knob_dir = $dir
ibrs_supported = " $dir /ibrs_enabled exists "
2018-01-21 13:48:05 +01:00
ibrs_enabled = $( cat " $dir /ibrs_enabled " 2>/dev/null)
_debug " ibrs: found $dir /ibrs_enabled= $ibrs_enabled "
2018-04-05 00:00:07 +02:00
# if ibrs_enabled is there, ibpb_enabled will be in the same dir
2018-01-21 13:48:05 +01:00
if [ -e " $dir /ibpb_enabled " ] ; then
2018-04-05 00:00:07 +02:00
# if the file is there, we have IBPB compiled-in (see note above for IBRS)
ibpb_supported = " $dir /ibpb_enabled exists "
2018-01-21 13:48:05 +01:00
ibpb_enabled = $( cat " $dir /ibpb_enabled " 2>/dev/null)
_debug " ibpb: found $dir /ibpb_enabled= $ibpb_enabled "
else
2018-04-05 00:00:07 +02:00
_debug " ibpb: $dir /ibpb_enabled file doesn't exist "
2018-01-21 13:48:05 +01:00
fi
2018-01-11 12:23:16 +01:00
break
2018-01-12 10:53:19 +01:00
else
2018-01-21 13:48:05 +01:00
_debug " ibrs: $dir /ibrs_enabled file doesn't exist "
2018-01-11 12:23:16 +01:00
fi
done
2018-03-25 12:23:46 +02:00
# on some newer kernels, the spec_ctrl_ibrs flag in "$procfs/cpuinfo"
2018-01-14 16:36:51 +01:00
# is set when ibrs has been administratively enabled (usually from cmdline)
# which in that case means ibrs is supported *and* enabled for kernel & user
# as per the ibrs patch series v3
2018-04-05 00:00:07 +02:00
if [ -z " $ibrs_supported " ] ; then
2018-03-25 12:23:46 +02:00
if grep ^flags " $procfs /cpuinfo " | grep -qw spec_ctrl_ibrs; then
_debug " ibrs: found spec_ctrl_ibrs flag in $procfs /cpuinfo "
2018-04-05 00:00:07 +02:00
ibrs_supported = " spec_ctrl_ibrs flag in $procfs /cpuinfo "
2018-01-14 16:36:51 +01:00
# enabled=2 -> kernel & user
ibrs_enabled = 2
2018-01-21 13:48:05 +01:00
# XXX and what about ibpb ?
2018-01-14 16:36:51 +01:00
fi
fi
2019-05-23 14:27:50 +02:00
if [ -n " $fullmsg " ] ; then
2018-04-05 00:00:07 +02:00
# when IBPB is enabled on 4.15+, we can see it in sysfs
2019-05-23 14:27:50 +02:00
if echo " $fullmsg " | grep -q 'IBPB' ; then
2018-04-05 00:00:07 +02:00
_debug "ibpb: found enabled in sysfs"
2018-04-05 22:04:20 +02:00
[ -z " $ibpb_supported " ] && ibpb_supported = 'IBPB found enabled in sysfs'
[ -z " $ibpb_enabled " ] && ibpb_enabled = 1
2018-04-05 00:00:07 +02:00
fi
# when IBRS_FW is enabled on 4.15+, we can see it in sysfs
2019-05-23 14:27:50 +02:00
if echo " $fullmsg " | grep -q ', IBRS_FW' ; then
2018-04-05 00:00:07 +02:00
_debug "ibrs: found IBRS_FW in sysfs"
2018-04-05 22:04:20 +02:00
[ -z " $ibrs_supported " ] && ibrs_supported = 'found IBRS_FW in sysfs'
2018-04-05 00:00:07 +02:00
ibrs_fw_enabled = 1
fi
# when IBRS is enabled on 4.15+, we can see it in sysfs
2019-08-14 12:42:27 +02:00
# on a more recent kernel, classic "IBRS" is not even longer an option, because of the performance impact.
# only "Enhanced IBRS" is available (on CPUs with the IBRS_ALL flag)
2019-05-23 14:27:50 +02:00
if echo " $fullmsg " | grep -q -e '\<IBRS\>' -e 'Indirect Branch Restricted Speculation' ; then
2018-04-05 00:00:07 +02:00
_debug "ibrs: found IBRS in sysfs"
2018-04-05 22:04:20 +02:00
[ -z " $ibrs_supported " ] && ibrs_supported = 'found IBRS in sysfs'
[ -z " $ibrs_enabled " ] && ibrs_enabled = 3
2018-04-05 00:00:07 +02:00
fi
2019-08-14 12:42:27 +02:00
# checking for 'Enhanced IBRS' in sysfs, enabled on CPUs with IBRS_ALL
2019-07-30 01:56:54 +02:00
if echo " $fullmsg " | grep -q -e 'Enhanced IBRS' ; then
2019-08-14 12:42:27 +02:00
[ -z " $ibrs_supported " ] && ibrs_supported = 'found Enhanced IBRS in sysfs'
# 4 isn't actually a valid value of the now extinct "ibrs_enabled" flag file,
# that only went from 0 to 3, so we use 4 as "enhanced ibrs is enabled"
ibrs_enabled = 4
2019-07-30 01:56:54 +02:00
fi
2018-04-05 00:00:07 +02:00
fi
# in live mode, if ibrs or ibpb is supported and we didn't find these are enabled, then they are not
[ -n " $ibrs_supported " ] && [ -z " $ibrs_enabled " ] && ibrs_enabled = 0
[ -n " $ibpb_supported " ] && [ -z " $ibpb_enabled " ] && ibpb_enabled = 0
fi
if [ -z " $ibrs_supported " ] ; then
check_redhat_canonical_spectre
if [ " $redhat_canonical_spectre " = 1 ] ; then
ibrs_supported = "Red Hat/Ubuntu variant"
ibpb_supported = "Red Hat/Ubuntu variant"
fi
fi
if [ -z " $ibrs_supported " ] && [ -n " $kernel " ] ; then
2019-05-05 18:34:09 +02:00
if ! command -v " ${ opt_arch_prefix } strings " >/dev/null 2>& 1; then
2018-04-05 00:00:07 +02:00
:
else
ibrs_can_tell = 1
ibrs_supported = $( " ${ opt_arch_prefix } strings " " $kernel " | grep -Fw -e ', IBRS_FW' | head -1)
if [ -n " $ibrs_supported " ] ; then
_debug " ibrs: found ibrs evidence in kernel image ( $ibrs_supported ) "
ibrs_supported = " found ' $ibrs_supported ' in kernel image "
fi
fi
2018-01-11 12:23:16 +01:00
fi
2018-04-05 00:00:07 +02:00
if [ -z " $ibrs_supported " ] && [ -n " $opt_map " ] ; then
2018-01-23 22:20:34 +01:00
ibrs_can_tell = 1
2018-01-11 12:23:16 +01:00
if grep -q spec_ctrl " $opt_map " ; then
2018-04-05 00:00:07 +02:00
ibrs_supported = "found spec_ctrl in symbols file"
2018-01-12 10:53:19 +01:00
_debug " ibrs: found '*spec_ctrl*' symbol in $opt_map "
2018-01-10 17:40:33 +01:00
fi
2018-01-10 12:24:16 +01:00
fi
2018-04-05 00:00:07 +02:00
# recent (4.15) vanilla kernels have IBPB but not IBRS, and without the debugfs tunables of Red Hat
# we can detect it directly in the image
if [ -z " $ibpb_supported " ] && [ -n " $kernel " ] ; then
2019-05-05 18:34:09 +02:00
if ! command -v " ${ opt_arch_prefix } strings " >/dev/null 2>& 1; then
2018-04-05 00:00:07 +02:00
:
else
ibpb_can_tell = 1
ibpb_supported = $( " ${ opt_arch_prefix } strings " " $kernel " | grep -Fw -e 'ibpb' -e ', IBPB' | head -1)
if [ -n " $ibpb_supported " ] ; then
_debug " ibpb: found ibpb evidence in kernel image ( $ibpb_supported ) "
ibpb_supported = " found ' $ibpb_supported ' in kernel image "
fi
2018-02-13 21:25:14 +01:00
fi
fi
2019-08-14 12:42:27 +02:00
2018-04-05 00:00:07 +02:00
_info_nol " * Kernel is compiled with IBRS support: "
if [ -z " $ibrs_supported " ] ; then
2018-01-23 22:20:34 +01:00
if [ " $ibrs_can_tell " = 1 ] ; then
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2018-01-23 22:20:34 +01:00
else
2019-06-30 02:56:11 +02:00
# problem obtaining/inspecting kernel or strings not installed, but if the later is true,
# then readelf is not installed either (both in binutils) which makes the former true, so
# either way kernel_err should be set
pstatus yellow UNKNOWN " couldn't check ( $kernel_err ) "
2018-01-23 22:20:34 +01:00
fi
2018-04-05 00:00:07 +02:00
else
2018-04-05 22:20:16 +02:00
if [ " $opt_verbose " -ge 2 ] ; then
pstatus green YES " $ibrs_supported "
else
pstatus green YES
fi
2018-01-11 12:23:16 +01:00
fi
2018-01-07 15:00:59 +01:00
2019-08-14 12:42:27 +02:00
_info_nol " * IBRS enabled and active: "
2018-01-11 12:23:16 +01:00
if [ " $opt_live " = 1 ] ; then
2018-01-21 13:48:05 +01:00
if [ " $ibpb_enabled " = 2 ] ; then
# if ibpb=2, ibrs is forcefully=0
pstatus blue NO "IBPB used instead of IBRS in all kernel entrypoints"
else
# 0 means disabled
# 1 is enabled only for kernel space
# 2 is enabled for kernel and user space
2018-04-05 00:00:07 +02:00
# 3 is enabled
2019-08-14 12:42:27 +02:00
# 4 is enhanced ibrs enabled
2018-01-21 13:48:05 +01:00
case " $ibrs_enabled " in
2018-04-05 00:00:07 +02:00
0)
if [ " $ibrs_fw_enabled " = 1 ] ; then
2018-04-16 09:07:54 +02:00
pstatus blue YES "for firmware code only"
2018-01-29 10:29:48 +01:00
else
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2018-01-29 10:29:48 +01:00
fi
; ;
2018-04-05 22:04:20 +02:00
1) if [ " $ibrs_fw_enabled " = 1 ] ; then pstatus green YES "for kernel space and firmware code" ; else pstatus green YES "for kernel space" ; fi ; ;
2) if [ " $ibrs_fw_enabled " = 1 ] ; then pstatus green YES "for kernel, user space, and firmware code" ; else pstatus green YES "for both kernel and user space" ; fi ; ;
2018-04-05 00:00:07 +02:00
3) if [ " $ibrs_fw_enabled " = 1 ] ; then pstatus green YES "for kernel and firmware code" ; else pstatus green YES; fi ; ;
2019-08-14 12:42:27 +02:00
4) pstatus green YES "Enhanced flavor, performance impact will be greatly reduced" ; ;
2018-05-21 22:01:27 +02:00
*) if [ " $cpuid_ibrs " != 'SPEC_CTRL' ] && [ " $cpuid_ibrs " != 'IBRS_SUPPORT' ] && [ " $cpuid_spec_ctrl " != -1 ] ;
2018-05-17 15:39:48 +02:00
then pstatus yellow NO; _debug "ibrs: known cpu not supporting SPEC-CTRL or IBRS" ;
else
pstatus yellow UNKNOWN; fi ; ;
2018-01-21 13:48:05 +01:00
esac
fi
2018-01-11 12:23:16 +01:00
else
pstatus blue N/A "not testable in offline mode"
fi
2018-01-10 12:24:16 +01:00
2018-04-05 00:00:07 +02:00
_info_nol " * Kernel is compiled with IBPB support: "
if [ -z " $ibpb_supported " ] ; then
if [ " $ibpb_can_tell " = 1 ] ; then
pstatus yellow NO
2018-01-21 13:48:05 +01:00
else
2018-04-05 00:00:07 +02:00
# if we're in offline mode without System.map, we can't really know
pstatus yellow UNKNOWN "in offline mode, we need the kernel image to be able to tell"
2018-01-21 13:48:05 +01:00
fi
else
2018-04-05 22:20:16 +02:00
if [ " $opt_verbose " -ge 2 ] ; then
pstatus green YES " $ibpb_supported "
else
pstatus green YES
fi
2018-01-21 13:48:05 +01:00
fi
2018-04-05 00:00:07 +02:00
_info_nol " * IBPB enabled and active: "
2018-01-21 13:48:05 +01:00
if [ " $opt_live " = 1 ] ; then
case " $ibpb_enabled " in
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"" )
if [ " $ibrs_supported " = 1 ] ; then
pstatus yellow UNKNOWN
else
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2018-01-29 10:29:48 +01:00
fi
; ;
2018-01-29 11:06:15 +01:00
0)
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2018-01-29 11:06:15 +01:00
; ;
2018-01-21 13:48:05 +01:00
1) pstatus green YES; ;
2) pstatus green YES "IBPB used instead of IBRS in all kernel entrypoints" ; ;
2018-01-11 12:23:16 +01:00
*) pstatus yellow UNKNOWN; ;
esac
2018-01-10 12:24:16 +01:00
else
2018-01-11 12:23:16 +01:00
pstatus blue N/A "not testable in offline mode"
2018-01-10 12:24:16 +01:00
fi
2018-01-11 12:23:16 +01:00
_info "* Mitigation 2"
2018-04-03 15:52:25 +02:00
_info_nol " * Kernel has branch predictor hardening (arm): "
2022-03-20 12:05:33 +01:00
bp_harden_can_tell = 0
bp_harden = ''
2018-03-27 20:55:13 +02:00
if [ -r " $opt_config " ] ; then
bp_harden_can_tell = 1
bp_harden = $( grep -w 'CONFIG_HARDEN_BRANCH_PREDICTOR=y' " $opt_config " )
if [ -n " $bp_harden " ] ; then
pstatus green YES
_debug " bp_harden: found ' $bp_harden ' in $opt_config "
fi
fi
if [ -z " $bp_harden " ] && [ -n " $opt_map " ] ; then
bp_harden_can_tell = 1
bp_harden = $( grep -w bp_hardening_data " $opt_map " )
if [ -n " $bp_harden " ] ; then
pstatus green YES
_debug " bp_harden: found ' $bp_harden ' in $opt_map "
fi
fi
if [ -z " $bp_harden " ] ; then
if [ " $bp_harden_can_tell " = 1 ] ; then
pstatus yellow NO
else
pstatus yellow UNKNOWN
fi
fi
2018-01-22 11:00:54 +01:00
_info_nol " * Kernel compiled with retpoline option: "
2018-01-11 12:23:16 +01:00
# We check the RETPOLINE kernel options
2022-03-20 12:05:33 +01:00
retpoline = 0
2018-01-11 12:23:16 +01:00
if [ -r " $opt_config " ] ; then
if grep -q '^CONFIG_RETPOLINE=y' " $opt_config " ; then
pstatus green YES
retpoline = 1
2018-01-29 10:29:48 +01:00
# shellcheck disable=SC2046
_debug 'retpoline: found ' $( grep '^CONFIG_RETPOLINE' " $opt_config " ) " in $opt_config "
2018-01-11 12:23:16 +01:00
else
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2018-01-11 12:23:16 +01:00
fi
2018-01-10 12:24:16 +01:00
else
2018-01-11 12:23:16 +01:00
pstatus yellow UNKNOWN "couldn't read your kernel configuration"
2018-01-10 12:24:16 +01:00
fi
2018-01-11 12:23:16 +01:00
2018-04-09 20:56:20 +02:00
if [ " $retpoline " = 1 ] ; then
# Now check if the compiler used to compile the kernel knows how to insert retpolines in generated asm
# For gcc, this is -mindirect-branch=thunk-extern (detected by the kernel makefiles)
# See gcc commit https://github.com/hjl-tools/gcc/commit/23b517d4a67c02d3ef80b6109218f2aadad7bd79
# In latest retpoline LKML patches, the noretpoline_setup symbol exists only if CONFIG_RETPOLINE is set
# *AND* if the compiler is retpoline-compliant, so look for that symbol
#
# if there is "retpoline" in the file and NOT "minimal", then it's full retpoline
# (works for vanilla and Red Hat variants)
2022-03-17 19:14:32 +01:00
#
# since 5.15.28, this is now "Retpolines" as the implementation was switched to a generic one,
# so we look for both "retpoline" and "retpolines"
2019-05-23 14:27:50 +02:00
if [ " $opt_live " = 1 ] && [ -n " $fullmsg " ] ; then
2022-03-17 19:14:32 +01:00
if echo " $fullmsg " | grep -qwi -e retpoline -e retpolines; then
2019-05-23 14:27:50 +02:00
if echo " $fullmsg " | grep -qwi minimal; then
2018-04-09 20:56:20 +02:00
retpoline_compiler = 0
retpoline_compiler_reason = "kernel reports minimal retpoline compilation"
else
retpoline_compiler = 1
retpoline_compiler_reason = "kernel reports full retpoline compilation"
fi
2018-04-05 00:00:07 +02:00
fi
2018-04-09 20:56:20 +02:00
elif [ -n " $opt_map " ] ; then
# look for the symbol
if grep -qw noretpoline_setup " $opt_map " ; then
retpoline_compiler = 1
retpoline_compiler_reason = "noretpoline_setup symbol found in System.map"
2018-01-29 10:29:48 +01:00
fi
2018-04-09 20:56:20 +02:00
elif [ -n " $kernel " ] ; then
# look for the symbol
2019-05-05 18:34:09 +02:00
if command -v " ${ opt_arch_prefix } nm " >/dev/null 2>& 1; then
2018-04-09 20:56:20 +02:00
# the proper way: use nm and look for the symbol
if " ${ opt_arch_prefix } nm " " $kernel " 2>/dev/null | grep -qw 'noretpoline_setup' ; then
retpoline_compiler = 1
retpoline_compiler_reason = "noretpoline_setup found in kernel symbols"
fi
elif grep -q noretpoline_setup " $kernel " ; then
# if we don't have nm, nevermind, the symbol name is long enough to not have
# any false positive using good old grep directly on the binary
retpoline_compiler = 1
retpoline_compiler_reason = "noretpoline_setup found in kernel"
2018-01-29 10:29:48 +01:00
fi
2018-01-11 12:23:16 +01:00
fi
2018-04-09 20:56:20 +02:00
if [ -n " $retpoline_compiler " ] ; then
_info_nol " * Kernel compiled with a retpoline-aware compiler: "
if [ " $retpoline_compiler " = 1 ] ; then
if [ -n " $retpoline_compiler_reason " ] ; then
pstatus green YES " $retpoline_compiler_reason "
2018-01-29 10:29:48 +01:00
else
2018-04-09 20:56:20 +02:00
pstatus green YES
2018-01-29 10:29:48 +01:00
fi
else
2018-04-09 20:56:20 +02:00
if [ -n " $retpoline_compiler_reason " ] ; then
pstatus red NO " $retpoline_compiler_reason "
else
pstatus red NO
fi
2018-01-29 10:29:48 +01:00
fi
2018-01-10 12:24:16 +01:00
fi
2018-01-08 15:45:09 +01:00
fi
2018-04-05 00:00:07 +02:00
# only Red Hat has a tunable to disable it on runtime
2022-03-20 12:05:33 +01:00
retp_enabled = -1
2018-04-05 00:00:07 +02:00
if [ " $opt_live " = 1 ] ; then
if [ -e " $specex_knob_dir /retp_enabled " ] ; then
retp_enabled = $( cat " $specex_knob_dir /retp_enabled " 2>/dev/null)
_debug " retpoline: found $specex_knob_dir /retp_enabled= $retp_enabled "
_info_nol " * Retpoline is enabled: "
if [ " $retp_enabled " = 1 ] ; then
pstatus green YES
else
pstatus yellow NO
fi
fi
fi
2018-04-05 00:03:04 +02:00
# only for information, in verbose mode
if [ " $opt_verbose " -ge 2 ] ; then
_info_nol " * Local gcc is retpoline-aware: "
2019-05-05 18:34:09 +02:00
if command -v gcc >/dev/null 2>& 1; then
2018-04-05 00:03:04 +02:00
if [ -n " $( gcc -mindirect-branch= thunk-extern --version 2>& 1 >/dev/null) " ] ; then
2018-04-05 22:20:16 +02:00
pstatus blue NO
2018-04-05 00:03:04 +02:00
else
2018-04-05 22:20:16 +02:00
pstatus green YES
2018-04-05 00:03:04 +02:00
fi
else
pstatus blue NO "gcc is not installed"
fi
fi
2018-08-09 21:03:58 +02:00
if is_vulnerable_to_empty_rsb || [ " $opt_verbose " -ge 2 ] ; then
2018-04-15 20:55:01 +02:00
_info_nol " * Kernel supports RSB filling: "
2020-03-10 22:13:55 +01:00
rsb_filling = 0
if [ " $opt_live " = 1 ] && [ " $opt_no_sysfs " != 1 ] ; then
# if we're live and we aren't denied looking into /sys, let's do it
if echo " $msg " | grep -qw RSB; then
rsb_filling = 1
2018-04-15 20:55:01 +02:00
pstatus green YES
2020-03-10 22:13:55 +01:00
fi
fi
if [ " $rsb_filling " = 0 ] ; then
if [ -n " $kernel_err " ] ; then
pstatus yellow UNKNOWN " couldn't check ( $kernel_err ) "
2018-04-15 20:55:01 +02:00
else
2020-03-10 22:13:55 +01:00
if grep -qw -e 'Filling RSB on context switch' " $kernel " ; then
rsb_filling = 1
pstatus green YES
else
rsb_filling = 0
pstatus yellow NO
fi
2018-04-15 20:55:01 +02:00
fi
fi
fi
2018-01-21 18:02:11 +01:00
elif [ " $sys_interface_available " = 0 ] ; then
# we have no sysfs but were asked to use it only!
msg = "/sys vulnerability interface use forced, but it's not available!"
status = UNK
2018-01-08 15:45:09 +01:00
fi
2018-09-17 21:44:22 +02:00
if ! is_cpu_vulnerable " $cve " ; then
2018-01-11 12:23:16 +01:00
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2018-04-07 18:04:06 +02:00
else
2020-03-10 22:13:55 +01:00
if [ " $retpoline " = 1 ] && [ " $retpoline_compiler " = 1 ] && [ " $retp_enabled " != 0 ] && [ -n " $ibpb_enabled " ] && [ " $ibpb_enabled " -ge 1 ] && ( ! is_vulnerable_to_empty_rsb || [ " $rsb_filling " = 1 ] ) ; then
2018-04-07 18:04:06 +02:00
pvulnstatus $cve OK "Full retpoline + IBPB are mitigating the vulnerability"
2020-03-10 22:13:55 +01:00
elif [ " $retpoline " = 1 ] && [ " $retpoline_compiler " = 1 ] && [ " $retp_enabled " != 0 ] && [ " $opt_paranoid " = 0 ] && ( ! is_vulnerable_to_empty_rsb || [ " $rsb_filling " = 1 ] ) ; then
2018-04-15 23:05:30 +02:00
pvulnstatus $cve OK "Full retpoline is mitigating the vulnerability"
2018-04-16 09:13:04 +02:00
if [ -n " $cpuid_ibpb " ] ; then
_warn "You should enable IBPB to complete retpoline as a Variant 2 mitigation"
else
_warn "IBPB is considered as a good addition to retpoline for Variant 2 mitigation, but your CPU microcode doesn't support it"
fi
2018-04-11 22:24:03 +02:00
elif [ -n " $ibrs_enabled " ] && [ -n " $ibpb_enabled " ] && [ " $ibrs_enabled " -ge 1 ] && [ " $ibpb_enabled " -ge 1 ] ; then
2019-08-14 12:42:27 +02:00
if [ " $ibrs_enabled " = 4 ] ; then
pvulnstatus $cve OK "Enhanced IBRS + IBPB are mitigating the vulnerability"
2019-07-30 01:56:54 +02:00
else
pvulnstatus $cve OK "IBRS + IBPB are mitigating the vulnerability"
fi
2018-04-08 16:24:43 +02:00
elif [ " $ibpb_enabled " = 2 ] && ! is_cpu_smt_enabled; then
pvulnstatus $cve OK "Full IBPB is mitigating the vulnerability"
2018-03-27 20:55:13 +02:00
elif [ -n " $bp_harden " ] ; then
2018-04-07 18:04:06 +02:00
pvulnstatus $cve OK "Branch predictor hardening mitigates the vulnerability"
elif [ -z " $bp_harden " ] && [ " $cpu_vendor " = ARM ] ; then
pvulnstatus $cve VULN "Branch predictor hardening is needed to mitigate the vulnerability"
explain "Your kernel has not been compiled with the CONFIG_UNMAP_KERNEL_AT_EL0 option, recompile it with this option enabled."
elif [ " $opt_live " != 1 ] ; then
if [ " $retpoline " = 1 ] && [ -n " $ibpb_supported " ] ; then
pvulnstatus $cve OK "offline mode: kernel supports retpoline + IBPB to mitigate the vulnerability"
elif [ -n " $ibrs_supported " ] && [ -n " $ibpb_supported " ] ; then
pvulnstatus $cve OK "offline mode: kernel supports IBRS + IBPB to mitigate the vulnerability"
elif [ " $ibrs_can_tell " != 1 ] ; then
2018-01-21 18:02:11 +01:00
pvulnstatus $cve UNK "offline mode: not enough information"
2018-04-05 00:03:04 +02:00
explain "Re-run this script with root privileges, and give it the kernel image (--kernel), the kernel configuration (--config) and the System.map file (--map) corresponding to the kernel you would like to inspect."
2018-01-11 12:23:16 +01:00
fi
2018-01-10 12:24:16 +01:00
fi
2018-04-07 18:04:06 +02:00
# if we arrive here and didn't already call pvulnstatus, then it's VULN, let's explain why
if [ " $pvulnstatus_last_cve " != " $cve " ] ; then
# explain what's needed for this CPU
2018-08-09 21:03:58 +02:00
if is_vulnerable_to_empty_rsb; then
2018-08-18 12:05:17 +02:00
pvulnstatus $cve VULN "IBRS+IBPB or retpoline+IBPB+RSB filling, is needed to mitigate the vulnerability"
2018-04-16 09:27:28 +02:00
explain "To mitigate this vulnerability, you need either IBRS + IBPB, both requiring hardware support from your CPU microcode in addition to kernel support, or a kernel compiled with retpoline and IBPB, with retpoline requiring a retpoline-aware compiler (re-run this script with -v to know if your version of gcc is retpoline-aware) and IBPB requiring hardware support from your CPU microcode. You also need a recent-enough kernel that supports RSB filling if you plan to use retpoline. For Skylake+ CPUs, the IBRS + IBPB approach is generally preferred as it guarantees complete protection, and the performance impact is not as high as with older CPUs in comparison with retpoline. More information about how to enable the missing bits for those two possible mitigations on your system follow. You only need to take one of the two approaches."
2019-01-20 19:32:36 +01:00
elif is_zen_cpu || is_moksha_cpu; then
2018-04-07 18:04:06 +02:00
pvulnstatus $cve VULN "retpoline+IBPB is needed to mitigate the vulnerability"
explain "To mitigate this vulnerability, You need a kernel compiled with retpoline + IBPB support, with retpoline requiring a retpoline-aware compiler (re-run this script with -v to know if your version of gcc is retpoline-aware) and IBPB requiring hardware support from your CPU microcode."
2019-01-20 19:32:36 +01:00
elif is_intel || is_amd || is_hygon; then
2018-04-08 16:26:06 +02:00
pvulnstatus $cve VULN "IBRS+IBPB or retpoline+IBPB is needed to mitigate the vulnerability"
explain "To mitigate this vulnerability, you need either IBRS + IBPB, both requiring hardware support from your CPU microcode in addition to kernel support, or a kernel compiled with retpoline and IBPB, with retpoline requiring a retpoline-aware compiler (re-run this script with -v to know if your version of gcc is retpoline-aware) and IBPB requiring hardware support from your CPU microcode. The retpoline + IBPB approach is generally preferred as the performance impact is lower. More information about how to enable the missing bits for those two possible mitigations on your system follow. You only need to take one of the two approaches."
2018-04-05 00:03:04 +02:00
else
2018-04-07 18:04:06 +02:00
# in that case, we might want to trust sysfs if it's there
if [ -n " $msg " ] ; then
[ " $msg " = Vulnerable ] && msg = " no known mitigation exists for your CPU vendor ( $cpu_vendor ) "
pvulnstatus $cve $status " $msg "
else
pvulnstatus $cve VULN " no known mitigation exists for your CPU vendor ( $cpu_vendor ) "
fi
fi
fi
# if we are in live mode, we can check for a lot more stuff and explain further
2018-04-15 20:55:55 +02:00
if [ " $opt_live " = 1 ] && [ " $vulnstatus " != "OK" ] ; then
2018-12-10 19:33:07 +01:00
_explain_hypervisor = "An updated CPU microcode will have IBRS/IBPB capabilities indicated in the Hardware Check section above. If you're running under a hypervisor (KVM, Xen, VirtualBox, VMware, ...), the hypervisor needs to be up to date to be able to export the new host CPU flags to the guest. You can run this script on the host to check if the host CPU is IBRS/IBPB. If it is, and it doesn't show up in the guest, upgrade the hypervisor. You may need to reconfigure your VM to use a CPU model that has IBRS capability; in Libvirt, such CPUs are listed with an IBRS suffix."
2018-04-07 18:04:06 +02:00
# IBPB (amd & intel)
2019-05-05 18:34:09 +02:00
if { [ -z " $ibpb_enabled " ] || [ " $ibpb_enabled " = 0 ] ; } && { is_intel || is_amd || is_hygon; } ; then
2018-04-08 14:41:08 +02:00
if [ -z " $cpuid_ibpb " ] ; then
2018-04-08 15:38:58 +02:00
explain " The microcode of your CPU needs to be upgraded to be able to use IBPB. This is usually done at boot time by your kernel (the upgrade is not persistent across reboots which is why it's done at each boot). If you're using a distro, make sure you are up to date, as microcode updates are usually shipped alongside with the distro kernel. Availability of a microcode update for you CPU model depends on your CPU vendor. You can usually find out online if a microcode update is available for your CPU by searching for your CPUID (indicated in the Hardware Check section). $_explain_hypervisor "
2018-04-07 18:04:06 +02:00
fi
if [ -z " $ibpb_supported " ] ; then
explain "Your kernel doesn't have IBPB support, so you need to either upgrade your kernel (if you're using a distro) or recompiling a more recent kernel."
fi
2018-04-08 14:41:08 +02:00
if [ -n " $cpuid_ibpb " ] && [ -n " $ibpb_supported " ] ; then
2018-04-07 18:04:06 +02:00
if [ -e " $specex_knob_dir /ibpb_enabled " ] ; then
2018-04-10 22:09:38 +02:00
# newer (April 2018) Red Hat kernels have ibpb_enabled as ro, and automatically enables it with retpoline
if [ ! -w " $specex_knob_dir /ibpb_enabled " ] && [ -e " $specex_knob_dir /retp_enabled " ] ; then
explain " Both your CPU and your kernel have IBPB support, but it is currently disabled. You kernel should enable IBPB automatically if you enable retpoline. You may enable it with \`echo 1 > $specex_knob_dir /retp_enabled\`. "
else
explain " Both your CPU and your kernel have IBPB support, but it is currently disabled. You may enable it with \`echo 1 > $specex_knob_dir /ibpb_enabled\`. "
fi
2018-04-07 18:04:06 +02:00
else
explain "Both your CPU and your kernel have IBPB support, but it is currently disabled. You may enable it. Check in your distro's documentation on how to do this."
fi
fi
2018-04-08 16:24:43 +02:00
elif [ " $ibpb_enabled " = 2 ] && is_cpu_smt_enabled; then
explain "You have ibpb_enabled set to 2, but it only offers sufficient protection when simultaneous multi-threading (aka SMT or HyperThreading) is disabled. You should reboot your system with the kernel parameter \`nosmt\`."
2018-04-07 18:04:06 +02:00
fi
# /IBPB
2018-04-08 16:26:06 +02:00
# IBRS (amd & intel)
2019-05-05 18:34:09 +02:00
if { [ -z " $ibrs_enabled " ] || [ " $ibrs_enabled " = 0 ] ; } && { is_intel || is_amd || is_hygon; } ; then
2018-04-08 16:27:57 +02:00
if [ -z " $cpuid_ibrs " ] ; then
2018-04-08 15:38:58 +02:00
explain " The microcode of your CPU needs to be upgraded to be able to use IBRS. This is usually done at boot time by your kernel (the upgrade is not persistent across reboots which is why it's done at each boot). If you're using a distro, make sure you are up to date, as microcode updates are usually shipped alongside with the distro kernel. Availability of a microcode update for you CPU model depends on your CPU vendor. You can usually find out online if a microcode update is available for your CPU by searching for your CPUID (indicated in the Hardware Check section). $_explain_hypervisor "
2018-04-07 18:04:06 +02:00
fi
if [ -z " $ibrs_supported " ] ; then
explain "Your kernel doesn't have IBRS support, so you need to either upgrade your kernel (if you're using a distro) or recompiling a more recent kernel."
fi
2018-04-08 14:41:08 +02:00
if [ -n " $cpuid_ibrs " ] && [ -n " $ibrs_supported " ] ; then
2018-04-07 18:04:06 +02:00
if [ -e " $specex_knob_dir /ibrs_enabled " ] ; then
explain " Both your CPU and your kernel have IBRS support, but it is currently disabled. You may enable it with \`echo 1 > $specex_knob_dir /ibrs_enabled\`. "
else
explain "Both your CPU and your kernel have IBRS support, but it is currently disabled. You may enable it. Check in your distro's documentation on how to do this."
fi
fi
fi
# /IBRS
unset _explain_hypervisor
2019-01-20 19:32:36 +01:00
# RETPOLINE (amd & intel &hygon )
if is_amd || is_intel || is_hygon; then
2018-04-07 18:04:06 +02:00
if [ " $retpoline " = 0 ] ; then
2022-03-20 12:05:33 +01:00
explain "Your kernel is not compiled with retpoline support, so you need to either upgrade your kernel (if you're using a distro) or recompile your kernel with the CONFIG_RETPOLINE option enabled. You also need to compile your kernel with a retpoline-aware compiler (re-run this script with -v to know if your version of gcc is retpoline-aware)."
2018-04-09 20:56:20 +02:00
elif [ " $retpoline " = 1 ] && [ " $retpoline_compiler " = 0 ] ; then
2018-04-07 18:04:06 +02:00
explain "Your kernel is compiled with retpoline, but without a retpoline-aware compiler (re-run this script with -v to know if your version of gcc is retpoline-aware)."
elif [ " $retpoline " = 1 ] && [ " $retpoline_compiler " = 1 ] && [ " $retp_enabled " = 0 ] ; then
explain " Your kernel has retpoline support and has been compiled with a retpoline-aware compiler, but retpoline is disabled. You should enable it with \`echo 1 > $specex_knob_dir /retp_enabled\`. "
fi
2018-04-05 00:03:04 +02:00
fi
2018-04-07 18:04:06 +02:00
# /RETPOLINE
2018-04-05 00:03:04 +02:00
fi
2018-01-08 20:50:42 +01:00
fi
2018-04-07 18:04:06 +02:00
# sysfs msgs:
#1 "Vulnerable"
#2 "Vulnerable: Minimal generic ASM retpoline"
#2 "Vulnerable: Minimal AMD ASM retpoline"
# "Mitigation: Full generic retpoline"
# "Mitigation: Full AMD retpoline"
# $MITIGATION + ", IBPB"
# $MITIGATION + ", IBRS_FW"
#5 $MITIGATION + " - vulnerable module loaded"
# Red Hat only:
#2 "Vulnerable: Minimal ASM retpoline",
#3 "Vulnerable: Retpoline without IBPB",
#4 "Vulnerable: Retpoline on Skylake+",
#5 "Vulnerable: Retpoline with unsafe module(s)",
# "Mitigation: Full retpoline",
# "Mitigation: Full retpoline and IBRS (user space)",
# "Mitigation: IBRS (kernel)",
# "Mitigation: IBRS (kernel and user space)",
# "Mitigation: IBP disabled",
2018-01-10 12:24:16 +01:00
}
2018-01-07 15:00:59 +01:00
2018-09-17 21:44:22 +02:00
check_CVE_2017_5715_bsd( )
2018-03-25 12:23:46 +02:00
{
2018-04-01 17:29:12 +02:00
_info "* Mitigation 1"
_info_nol " * Kernel supports IBRS: "
2018-03-25 12:23:46 +02:00
ibrs_disabled = $( sysctl -n hw.ibrs_disable 2>/dev/null)
if [ -z " $ibrs_disabled " ] ; then
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2018-03-25 12:23:46 +02:00
else
pstatus green YES
fi
2018-04-01 17:29:12 +02:00
_info_nol " * IBRS enabled and active: "
2018-03-25 12:23:46 +02:00
ibrs_active = $( sysctl -n hw.ibrs_active 2>/dev/null)
if [ " $ibrs_active " = 1 ] ; then
pstatus green YES
else
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2018-03-25 12:23:46 +02:00
fi
2018-04-01 17:29:12 +02:00
_info "* Mitigation 2"
_info_nol " * Kernel compiled with RETPOLINE: "
2022-03-20 12:05:33 +01:00
retpoline = 0
2018-04-01 17:29:12 +02:00
if [ -n " $kernel_err " ] ; then
pstatus yellow UNKNOWN " couldn't check ( $kernel_err ) "
else
2019-05-05 18:34:09 +02:00
if ! command -v " ${ opt_arch_prefix } readelf " >/dev/null 2>& 1; then
2018-04-01 17:29:12 +02:00
pstatus yellow UNKNOWN " missing ' ${ opt_arch_prefix } readelf' tool, please install it, usually it's in the binutils package "
else
nb_thunks = $( " ${ opt_arch_prefix } readelf " -s " $kernel " | grep -c -e __llvm_retpoline_ -e __llvm_external_retpoline_ -e __x86_indirect_thunk_)
if [ " $nb_thunks " -gt 0 ] ; then
retpoline = 1
pstatus green YES " found $nb_thunks thunk(s) "
else
pstatus yellow NO
fi
fi
fi
2018-09-17 21:44:22 +02:00
if ! is_cpu_vulnerable " $cve " ; then
2018-03-25 12:23:46 +02:00
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2018-04-01 17:29:12 +02:00
elif [ " $retpoline " = 1 ] ; then
pvulnstatus $cve OK "Retpoline mitigates the vulnerability"
2018-03-25 12:23:46 +02:00
elif [ " $ibrs_active " = 1 ] ; then
pvulnstatus $cve OK "IBRS mitigates the vulnerability"
elif [ " $ibrs_disabled " = 0 ] ; then
pvulnstatus $cve VULN "IBRS is supported by your kernel but your CPU microcode lacks support"
2018-04-08 20:07:43 +02:00
explain "The microcode of your CPU needs to be upgraded to be able to use IBRS. Availability of a microcode update for you CPU model depends on your CPU vendor. You can usually find out online if a microcode update is available for your CPU by searching for your CPUID (indicated in the Hardware Check section). To do a microcode update, you can search the ports for the \`cpupdate\` tool. Microcode updates done this way are not reboot-proof, so be sure to do it every time the system boots up."
2018-03-25 12:23:46 +02:00
elif [ " $ibrs_disabled " = 1 ] ; then
pvulnstatus $cve VULN "IBRS is supported but administratively disabled on your system"
2018-04-08 15:38:58 +02:00
explain "To enable IBRS, use \`sysctl hw.ibrs_disable=0\`"
2018-03-25 12:23:46 +02:00
else
pvulnstatus $cve VULN "IBRS is needed to mitigate the vulnerability but your kernel is missing support"
2018-04-08 15:38:58 +02:00
explain "You need to either upgrade your kernel or recompile yourself a more recent version having IBRS support"
2018-03-25 12:23:46 +02:00
fi
}
2018-09-17 21:44:22 +02:00
##################
# MELTDOWN SECTION
2018-04-08 17:59:02 +02:00
# no security impact but give a hint to the user in verbose mode
# about PCID/INVPCID cpuid features that must be present to avoid
# too big a performance impact with PTI
# refs:
# https://marc.info/?t=151532047900001&r=1&w=2
# https://groups.google.com/forum/m/#!topic/mechanical-sympathy/L9mHTbeQLNU
pti_performance_check( )
{
_info_nol " * Reduced performance impact of PTI: "
if [ -e " $procfs /cpuinfo " ] && grep ^flags " $procfs /cpuinfo " | grep -qw pcid; then
cpu_pcid = 1
else
2022-03-19 18:39:10 +01:00
read_cpuid 0x1 0x0 $ECX 17 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
cpu_pcid = 1
fi
2018-04-08 17:59:02 +02:00
fi
if [ -e " $procfs /cpuinfo " ] && grep ^flags " $procfs /cpuinfo " | grep -qw invpcid; then
cpu_invpcid = 1
else
2022-03-19 18:39:10 +01:00
read_cpuid 0x7 0x0 $EBX 10 1 1; ret = $?
2022-03-20 00:08:17 +01:00
if [ $ret = $READ_CPUID_RET_OK ] ; then
cpu_invpcid = 1
fi
2018-04-08 17:59:02 +02:00
fi
if [ " $cpu_invpcid " = 1 ] ; then
pstatus green YES 'CPU supports INVPCID, performance impact of PTI will be greatly reduced'
elif [ " $cpu_pcid " = 1 ] ; then
2018-04-08 20:07:43 +02:00
pstatus green YES 'CPU supports PCID, performance impact of PTI will be reduced'
2018-04-08 17:59:02 +02:00
else
2018-04-08 20:07:43 +02:00
pstatus blue NO 'PCID/INVPCID not supported, performance impact of PTI will be significant'
2018-04-08 17:59:02 +02:00
fi
}
2018-09-17 21:44:22 +02:00
# rogue data cache load aka 'Meltdown' aka 'Variant 3'
check_CVE_2017_5754( )
2018-01-10 12:24:16 +01:00
{
2018-09-17 21:44:22 +02:00
cve = 'CVE-2017-5754'
_info " \033[1;34m $cve aka ' $( cve2name " $cve " ) '\033[0m "
2018-03-25 12:23:46 +02:00
if [ " $os " = Linux ] ; then
2018-09-17 21:44:22 +02:00
check_CVE_2017_5754_linux
2018-03-25 12:23:46 +02:00
elif echo " $os " | grep -q BSD; then
2018-09-17 21:44:22 +02:00
check_CVE_2017_5754_bsd
2018-03-25 12:23:46 +02:00
else
_warn " Unsupported OS ( $os ) "
fi
}
2018-01-11 12:23:16 +01:00
2018-09-17 21:44:22 +02:00
check_CVE_2017_5754_linux( )
2018-03-25 12:23:46 +02:00
{
2018-01-11 12:23:16 +01:00
status = UNK
sys_interface_available = 0
msg = ''
if sys_interface_check "/sys/devices/system/cpu/vulnerabilities/meltdown" ; then
# this kernel has the /sys interface, trust it over everything
sys_interface_available = 1
2018-01-22 10:56:24 +01:00
fi
if [ " $opt_sysfs_only " != 1 ] ; then
2018-01-11 12:23:16 +01:00
_info_nol "* Kernel supports Page Table Isolation (PTI): "
2018-03-27 20:55:13 +02:00
kpti_support = ''
2018-01-11 12:23:16 +01:00
kpti_can_tell = 0
if [ -n " $opt_config " ] ; then
kpti_can_tell = 1
2018-03-27 20:55:13 +02:00
kpti_support = $( grep -w -e CONFIG_PAGE_TABLE_ISOLATION = y -e CONFIG_KAISER = y -e CONFIG_UNMAP_KERNEL_AT_EL0 = y " $opt_config " )
if [ -n " $kpti_support " ] ; then
_debug " kpti_support: found option ' $kpti_support ' in $opt_config "
2018-01-11 12:23:16 +01:00
fi
2018-01-08 15:34:53 +01:00
fi
2018-03-27 20:55:13 +02:00
if [ -z " $kpti_support " ] && [ -n " $opt_map " ] ; then
2018-01-11 12:23:16 +01:00
# it's not an elif: some backports don't have the PTI config but still include the patch
# so we try to find an exported symbol that is part of the PTI patch in System.map
2018-03-27 20:55:13 +02:00
# parse_kpti: arm
2018-01-11 12:23:16 +01:00
kpti_can_tell = 1
2018-03-27 20:55:13 +02:00
kpti_support = $( grep -w -e kpti_force_enabled -e parse_kpti " $opt_map " )
if [ -n " $kpti_support " ] ; then
_debug " kpti_support: found ' $kpti_support ' in $opt_map "
2018-01-10 12:24:16 +01:00
fi
fi
2018-03-27 20:55:13 +02:00
if [ -z " $kpti_support " ] && [ -n " $kernel " ] ; then
2018-04-01 17:29:12 +02:00
# same as above but in case we don't have System.map and only kernel, look for the
2018-01-11 12:23:16 +01:00
# nopti option that is part of the patch (kernel command line option)
2018-03-27 20:55:13 +02:00
# 'kpti=': arm
2018-01-11 12:23:16 +01:00
kpti_can_tell = 1
2019-05-05 18:34:09 +02:00
if ! command -v " ${ opt_arch_prefix } strings " >/dev/null 2>& 1; then
2018-03-17 13:17:10 +01:00
pstatus yellow UNKNOWN " missing ' ${ opt_arch_prefix } strings' tool, please install it, usually it's in the binutils package "
2018-01-11 12:23:16 +01:00
else
2018-03-27 20:55:13 +02:00
kpti_support = $( " ${ opt_arch_prefix } strings " " $kernel " | grep -w -e nopti -e kpti = )
if [ -n " $kpti_support " ] ; then
_debug " kpti_support: found ' $kpti_support ' in $kernel "
2018-01-11 12:23:16 +01:00
fi
fi
fi
2018-01-10 12:24:16 +01:00
2018-03-27 20:55:13 +02:00
if [ -n " $kpti_support " ] ; then
2018-04-05 22:20:16 +02:00
if [ " $opt_verbose " -ge 2 ] ; then
pstatus green YES " found ' $kpti_support ' "
else
pstatus green YES
fi
2018-01-11 12:23:16 +01:00
elif [ " $kpti_can_tell " = 1 ] ; then
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2018-01-10 12:24:16 +01:00
else
2018-01-11 12:23:16 +01:00
pstatus yellow UNKNOWN "couldn't read your kernel configuration nor System.map file"
2018-01-10 12:24:16 +01:00
fi
2018-01-11 12:23:16 +01:00
mount_debugfs
2018-04-05 00:00:07 +02:00
_info_nol " * PTI enabled and active: "
2018-01-11 12:23:16 +01:00
if [ " $opt_live " = 1 ] ; then
2018-01-11 15:35:57 +01:00
dmesg_grep = "Kernel/User page tables isolation: enabled"
dmesg_grep = " $dmesg_grep |Kernel page table isolation enabled "
dmesg_grep = " $dmesg_grep |x86/pti: Unmapping kernel while in userspace "
2018-08-29 14:40:52 +02:00
# aarch64
dmesg_grep = " $dmesg_grep |CPU features: detected( feature)?: Kernel page table isolation \(KPTI\) "
2018-03-25 12:23:46 +02:00
if grep ^flags " $procfs /cpuinfo " | grep -qw pti; then
2018-01-11 12:23:16 +01:00
# vanilla PTI patch sets the 'pti' flag in cpuinfo
2018-03-25 12:23:46 +02:00
_debug " kpti_enabled: found 'pti' flag in $procfs /cpuinfo "
2018-01-11 12:23:16 +01:00
kpti_enabled = 1
2018-03-25 12:23:46 +02:00
elif grep ^flags " $procfs /cpuinfo " | grep -qw kaiser; then
2018-01-11 12:23:16 +01:00
# kernel line 4.9 sets the 'kaiser' flag in cpuinfo
2018-03-25 12:23:46 +02:00
_debug " kpti_enabled: found 'kaiser' flag in $procfs /cpuinfo "
2018-01-11 12:23:16 +01:00
kpti_enabled = 1
elif [ -e /sys/kernel/debug/x86/pti_enabled ] ; then
2018-02-13 21:25:14 +01:00
# Red Hat Backport creates a dedicated file, see https://access.redhat.com/articles/3311301
2018-01-11 12:23:16 +01:00
kpti_enabled = $( cat /sys/kernel/debug/x86/pti_enabled 2>/dev/null)
2018-01-12 10:53:19 +01:00
_debug " kpti_enabled: file /sys/kernel/debug/x86/pti_enabled exists and says: $kpti_enabled "
2019-05-07 20:35:52 +02:00
elif is_xen_dom0; then
pti_xen_pv_domU = $( xl dmesg | grep 'XPTI' | grep 'DomU enabled' | head -1)
[ -n " $pti_xen_pv_domU " ] && kpti_enabled = 1
2018-01-21 15:17:10 +01:00
fi
if [ -z " $kpti_enabled " ] ; then
dmesg_grep " $dmesg_grep " ; ret = $?
if [ $ret -eq 0 ] ; then
_debug " kpti_enabled: found hint in dmesg: $dmesg_grepped "
kpti_enabled = 1
elif [ $ret -eq 2 ] ; then
_debug "kpti_enabled: dmesg truncated"
kpti_enabled = -1
fi
fi
if [ -z " $kpti_enabled " ] ; then
2018-01-12 10:53:19 +01:00
_debug "kpti_enabled: couldn't find any hint that PTI is enabled"
2018-01-11 12:23:16 +01:00
kpti_enabled = 0
fi
if [ " $kpti_enabled " = 1 ] ; then
pstatus green YES
2018-01-21 15:17:10 +01:00
elif [ " $kpti_enabled " = -1 ] ; then
pstatus yellow UNKNOWN "dmesg truncated, please reboot and relaunch this script"
2018-01-11 12:23:16 +01:00
else
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2018-01-11 12:23:16 +01:00
fi
2018-01-10 12:24:16 +01:00
else
2018-04-05 00:00:07 +02:00
pstatus blue N/A "not testable in offline mode"
2018-01-10 12:24:16 +01:00
fi
2018-01-14 17:18:34 +01:00
2018-04-08 17:59:02 +02:00
pti_performance_check
2018-01-21 18:02:11 +01:00
elif [ " $sys_interface_available " = 0 ] ; then
# we have no sysfs but were asked to use it only!
msg = "/sys vulnerability interface use forced, but it's not available!"
status = UNK
2018-01-08 20:50:42 +01:00
fi
2018-01-10 12:24:16 +01:00
2018-01-24 17:14:04 +01:00
# Test if the current host is a Xen PV Dom0 / DomU
2022-03-20 12:05:33 +01:00
xen_pv_domo = 0
xen_pv_domu = 0
2019-05-07 20:35:52 +02:00
is_xen_dom0 && xen_pv_domo = 1
is_xen_domU && xen_pv_domu = 1
2018-01-24 17:14:04 +01:00
if [ " $opt_live " = 1 ] ; then
# checking whether we're running under Xen PV 64 bits. If yes, we are affected by variant3
# (unless we are a Dom0)
_info_nol "* Running as a Xen PV DomU: "
if [ " $xen_pv_domu " = 1 ] ; then
2018-03-25 18:13:02 +02:00
pstatus yellow YES
2018-01-24 17:14:04 +01:00
else
2018-03-25 12:27:40 +02:00
pstatus blue NO
2018-01-24 17:14:04 +01:00
fi
fi
2018-09-17 21:44:22 +02:00
if ! is_cpu_vulnerable " $cve " ; then
2018-01-11 12:23:16 +01:00
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2018-01-11 12:23:16 +01:00
elif [ -z " $msg " ] ; then
# if msg is empty, sysfs check didn't fill it, rely on our own test
if [ " $opt_live " = 1 ] ; then
if [ " $kpti_enabled " = 1 ] ; then
pvulnstatus $cve OK "PTI mitigates the vulnerability"
2018-01-24 17:14:04 +01:00
elif [ " $xen_pv_domo " = 1 ] ; then
pvulnstatus $cve OK "Xen Dom0s are safe and do not require PTI"
elif [ " $xen_pv_domu " = 1 ] ; then
2018-02-14 14:24:55 +01:00
pvulnstatus $cve VULN "Xen PV DomUs are vulnerable and need to be run in HVM, PVHVM, PVH mode, or the Xen hypervisor must have the Xen's own PTI patch"
2018-04-05 00:03:04 +02:00
explain "Go to https://blog.xenproject.org/2018/01/22/xen-project-spectre-meltdown-faq-jan-22-update/ for more information"
2018-04-03 12:45:17 +02:00
elif [ " $kpti_enabled " = -1 ] ; then
pvulnstatus $cve UNK "couldn't find any clue of PTI activation due to a truncated dmesg, please reboot and relaunch this script"
2018-01-11 12:23:16 +01:00
else
pvulnstatus $cve VULN "PTI is needed to mitigate the vulnerability"
2018-04-05 00:03:04 +02:00
if [ -n " $kpti_support " ] ; then
if [ -e "/sys/kernel/debug/x86/pti_enabled" ] ; then
explain "Your kernel supports PTI but it's disabled, you can enable it with \`echo 1 > /sys/kernel/debug/x86/pti_enabled\`"
2019-11-17 18:36:08 +01:00
elif echo " $kernel_cmdline " | grep -q -w -e nopti -e pti = off; then
2018-04-05 00:03:04 +02:00
explain "Your kernel supports PTI but it has been disabled on command-line, remove the nopti or pti=off option from your bootloader configuration"
else
explain "Your kernel supports PTI but it has been disabled, check \`dmesg\` right after boot to find clues why the system disabled it"
fi
else
explain "If you're using a distro kernel, upgrade your distro to get the latest kernel available. Otherwise, recompile the kernel with the CONFIG_PAGE_TABLE_ISOLATION option (named CONFIG_KAISER for some kernels), or the CONFIG_UNMAP_KERNEL_AT_EL0 option (for ARM64)"
fi
2018-01-11 12:23:16 +01:00
fi
2018-01-10 12:24:16 +01:00
else
2018-03-27 20:55:13 +02:00
if [ -n " $kpti_support " ] ; then
2018-01-11 12:23:16 +01:00
pvulnstatus $cve OK "offline mode: PTI will mitigate the vulnerability if enabled at runtime"
2018-01-23 22:20:34 +01:00
elif [ " $kpti_can_tell " = 1 ] ; then
2018-01-11 12:23:16 +01:00
pvulnstatus $cve VULN "PTI is needed to mitigate the vulnerability"
2018-04-05 00:03:04 +02:00
explain "If you're using a distro kernel, upgrade your distro to get the latest kernel available. Otherwise, recompile the kernel with the CONFIG_PAGE_TABLE_ISOLATION option (named CONFIG_KAISER for some kernels), or the CONFIG_UNMAP_KERNEL_AT_EL0 option (for ARM64)"
2018-01-23 22:20:34 +01:00
else
pvulnstatus $cve UNK "offline mode: not enough information"
2018-04-05 00:03:04 +02:00
explain "Re-run this script with root privileges, and give it the kernel image (--kernel), the kernel configuration (--config) and the System.map file (--map) corresponding to the kernel you would like to inspect."
2018-01-11 12:23:16 +01:00
fi
2018-01-10 12:24:16 +01:00
fi
2018-01-08 20:50:42 +01:00
else
2018-01-24 17:14:04 +01:00
if [ " $xen_pv_domo " = 1 ] ; then
msg = "Xen Dom0s are safe and do not require PTI"
status = "OK"
elif [ " $xen_pv_domu " = 1 ] ; then
2018-03-31 13:44:04 +02:00
msg = "Xen PV DomUs are vulnerable and need to be run in HVM, PVHVM, PVH mode, or the Xen hypervisor must have the Xen's own PTI patch"
2018-01-24 17:14:04 +01:00
status = "VULN"
2018-04-05 00:03:04 +02:00
_explain = "Go to https://blog.xenproject.org/2018/01/22/xen-project-spectre-meltdown-faq-jan-22-update/ for more information"
2018-01-24 17:14:04 +01:00
elif [ " $msg " = "Vulnerable" ] ; then
msg = "PTI is needed to mitigate the vulnerability"
2018-04-05 00:03:04 +02:00
_explain = "If you're using a distro kernel, upgrade your distro to get the latest kernel available. Otherwise, recompile the kernel with the CONFIG_PAGE_TABLE_ISOLATION option (named CONFIG_KAISER for some kernels), or the CONFIG_UNMAP_KERNEL_AT_EL0 option (for ARM64)"
2018-01-24 17:14:04 +01:00
fi
2018-01-11 12:23:16 +01:00
pvulnstatus $cve " $status " " $msg "
2022-03-20 12:05:33 +01:00
[ -z " ${ _explain :- } " ] && [ " $msg " = "Vulnerable" ] && _explain = "If you're using a distro kernel, upgrade your distro to get the latest kernel available. Otherwise, recompile the kernel with the CONFIG_PAGE_TABLE_ISOLATION option (named CONFIG_KAISER for some kernels), or the CONFIG_UNMAP_KERNEL_AT_EL0 option (for ARM64)"
[ -n " ${ _explain :- } " ] && explain " $_explain "
2018-04-05 00:03:04 +02:00
unset _explain
2018-01-08 20:50:42 +01:00
fi
2018-01-24 17:14:04 +01:00
# Warn the user about XSA-254 recommended mitigations
if [ " $xen_pv_domo " = 1 ] ; then
2018-01-26 14:16:34 +01:00
_warn
_warn "This host is a Xen Dom0. Please make sure that you are running your DomUs"
_warn "in HVM, PVHVM or PVH mode to prevent any guest-to-host / host-to-guest attacks."
_warn
_warn "See https://blog.xenproject.org/2018/01/22/xen-project-spectre-meltdown-faq-jan-22-update/ and XSA-254 for details."
fi
2018-01-10 12:24:16 +01:00
}
2018-01-07 15:00:59 +01:00
2018-09-17 21:44:22 +02:00
check_CVE_2017_5754_bsd( )
2018-03-25 12:23:46 +02:00
{
_info_nol "* Kernel supports Page Table Isolation (PTI): "
kpti_enabled = $( sysctl -n vm.pmap.pti 2>/dev/null)
if [ -z " $kpti_enabled " ] ; then
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2018-03-25 12:23:46 +02:00
else
pstatus green YES
fi
2018-04-05 00:00:07 +02:00
_info_nol " * PTI enabled and active: "
2018-03-25 12:23:46 +02:00
if [ " $kpti_enabled " = 1 ] ; then
pstatus green YES
else
2018-03-25 13:42:06 +02:00
pstatus yellow NO
2018-03-25 12:23:46 +02:00
fi
2018-04-08 17:59:02 +02:00
pti_performance_check
2018-09-17 21:44:22 +02:00
if ! is_cpu_vulnerable " $cve " ; then
2018-03-25 12:23:46 +02:00
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2018-03-25 12:23:46 +02:00
elif [ " $kpti_enabled " = 1 ] ; then
pvulnstatus $cve OK "PTI mitigates the vulnerability"
elif [ -n " $kpti_enabled " ] ; then
pvulnstatus $cve VULN "PTI is supported but disabled on your system"
else
pvulnstatus $cve VULN "PTI is needed to mitigate the vulnerability"
fi
}
2018-09-17 21:44:22 +02:00
####################
# VARIANT 3A SECTION
# rogue system register read aka 'Variant 3a'
check_CVE_2018_3640( )
2018-05-21 22:01:27 +02:00
{
2018-09-17 21:44:22 +02:00
cve = 'CVE-2018-3640'
_info " \033[1;34m $cve aka ' $( cve2name " $cve " ) '\033[0m "
2018-05-21 22:01:27 +02:00
2018-05-22 09:38:29 +02:00
status = UNK
sys_interface_available = 0
msg = ''
2018-05-24 16:32:53 +02:00
_info_nol "* CPU microcode mitigates the vulnerability: "
2018-05-23 22:50:52 +02:00
if [ -n " $cpuid_ssbd " ] ; then
2018-05-23 21:08:08 +02:00
# microcodes that ship with SSBD are known to also fix variant3a
# there is no specific cpuid bit as far as we know
pstatus green YES
else
pstatus yellow NO
fi
2018-05-22 09:38:29 +02:00
2018-09-17 21:44:22 +02:00
if ! is_cpu_vulnerable " $cve " ; then
2018-05-21 22:01:27 +02:00
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2018-05-23 22:50:52 +02:00
elif [ -n " $cpuid_ssbd " ] ; then
2018-05-23 21:08:08 +02:00
pvulnstatus $cve OK "your CPU microcode mitigates the vulnerability"
2018-05-21 22:01:27 +02:00
else
2018-05-23 21:08:08 +02:00
pvulnstatus $cve VULN "an up-to-date CPU microcode is needed to mitigate this vulnerability"
explain "The microcode of your CPU needs to be upgraded to mitigate this vulnerability. This is usually done at boot time by your kernel (the upgrade is not persistent across reboots which is why it's done at each boot). If you're using a distro, make sure you are up to date, as microcode updates are usually shipped alongside with the distro kernel. Availability of a microcode update for you CPU model depends on your CPU vendor. You can usually find out online if a microcode update is available for your CPU by searching for your CPUID (indicated in the Hardware Check section). The microcode update is enough, there is no additional OS, kernel or software change needed."
2018-05-21 22:01:27 +02:00
fi
}
2018-09-17 21:44:22 +02:00
###################
# VARIANT 4 SECTION
# speculative store bypass aka 'Variant 4'
check_CVE_2018_3639( )
2018-05-21 22:01:27 +02:00
{
2018-09-17 21:44:22 +02:00
cve = 'CVE-2018-3639'
_info " \033[1;34m $cve aka ' $( cve2name " $cve " ) '\033[0m "
2018-09-18 22:00:32 +02:00
if [ " $os " = Linux ] ; then
check_CVE_2018_3639_linux
elif echo " $os " | grep -q BSD; then
check_CVE_2018_3639_bsd
else
_warn " Unsupported OS ( $os ) "
fi
}
2018-05-21 22:01:27 +02:00
2018-09-18 22:00:32 +02:00
check_CVE_2018_3639_linux( )
{
2018-05-22 09:39:11 +02:00
status = UNK
sys_interface_available = 0
msg = ''
if sys_interface_check "/sys/devices/system/cpu/vulnerabilities/spec_store_bypass" ; then
# this kernel has the /sys interface, trust it over everything
sys_interface_available = 1
fi
if [ " $opt_sysfs_only " != 1 ] ; then
2019-04-20 20:27:45 +02:00
_info_nol "* Kernel supports disabling speculative store bypass (SSB): "
2018-05-22 12:05:46 +02:00
if [ " $opt_live " = 1 ] ; then
2018-09-17 22:26:20 +02:00
if grep -Eq 'Speculation.?Store.?Bypass:' " $procfs /self/status " 2>/dev/null; then
kernel_ssb = " found in $procfs /self/status "
_debug " found Speculation.Store.Bypass: in $procfs /self/status "
2018-05-22 12:05:46 +02:00
fi
fi
2020-06-06 18:27:29 +02:00
# arm64 kernels can have cpu_show_spec_store_bypass with ARM64_SSBD, so exclude them
if [ -z " $kernel_ssb " ] && [ -n " $kernel " ] && ! grep -q 'arm64_sys_' " $kernel " ; then
2018-05-22 12:05:46 +02:00
kernel_ssb = $( " ${ opt_arch_prefix } strings " " $kernel " | grep spec_store_bypass | head -n1) ;
2020-06-06 18:27:29 +02:00
[ -n " $kernel_ssb " ] && kernel_ssb = " found $kernel_ssb in kernel "
fi
# arm64 kernels can have cpu_show_spec_store_bypass with ARM64_SSBD, so exclude them
if [ -z " $kernel_ssb " ] && [ -n " $opt_map " ] && ! grep -q 'arm64_sys_' " $opt_map " ; then
kernel_ssb = $( grep spec_store_bypass " $opt_map " | awk '{print $3}' | head -n1)
[ -n " $kernel_ssb " ] && kernel_ssb = " found $kernel_ssb in System.map "
2018-05-22 12:05:46 +02:00
fi
2020-06-06 18:27:29 +02:00
# arm64 only:
2018-05-22 12:05:46 +02:00
if [ -z " $kernel_ssb " ] && [ -n " $opt_map " ] ; then
2020-06-06 18:27:29 +02:00
kernel_ssb = $( grep -w cpu_enable_ssbs " $opt_map " | awk '{print $3}' | head -n1)
[ -n " $kernel_ssb " ] && kernel_ssb = " found $kernel_ssb in System.map "
fi
if [ -z " $kernel_ssb " ] && [ -n " $opt_config " ] ; then
kernel_ssb = $( grep -w 'CONFIG_ARM64_SSBD=y' " $opt_config " )
[ -n " $kernel_ssb " ] && kernel_ssb = "CONFIG_ARM64_SSBD enabled in kconfig"
fi
if [ -z " $kernel_ssb " ] && [ -n " $kernel " ] ; then
# this string only appears in kernel if CONFIG_ARM64_SSBD is set
kernel_ssb = $( grep -w "Speculative Store Bypassing Safe (SSBS)" " $kernel " )
[ -n " $kernel_ssb " ] && kernel_ssb = "found 'Speculative Store Bypassing Safe (SSBS)' in kernel"
2018-05-22 12:05:46 +02:00
fi
2020-06-06 18:27:29 +02:00
# /arm64 only
2018-05-22 12:05:46 +02:00
if [ -n " $kernel_ssb " ] ; then
pstatus green YES " $kernel_ssb "
else
pstatus yellow NO
fi
2019-04-20 20:27:45 +02:00
kernel_ssbd_enabled = -1
if [ " $opt_live " = 1 ] ; then
# https://elixir.bootlin.com/linux/v5.0/source/fs/proc/array.c#L340
_info_nol "* SSB mitigation is enabled and active: "
if grep -Eq 'Speculation.?Store.?Bypass:[[:space:]]+thread' " $procfs /self/status " 2>/dev/null; then
kernel_ssbd_enabled = 1
pstatus green YES "per-thread through prctl"
elif grep -Eq 'Speculation.?Store.?Bypass:[[:space:]]+globally mitigated' " $procfs /self/status " 2>/dev/null; then
kernel_ssbd_enabled = 2
pstatus green YES "global"
elif grep -Eq 'Speculation.?Store.?Bypass:[[:space:]]+vulnerable' " $procfs /self/status " 2>/dev/null; then
kernel_ssbd_enabled = 0
pstatus yellow NO
elif grep -Eq 'Speculation.?Store.?Bypass:[[:space:]]+not vulnerable' " $procfs /self/status " 2>/dev/null; then
kernel_ssbd_enabled = -2
pstatus blue NO "not vulnerable"
2020-06-06 17:39:07 +02:00
elif grep -Eq 'Speculation.?Store.?Bypass:[[:space:]]+unknown' " $procfs /self/status " 2>/dev/null; then
kernel_ssbd_enabled = 0
pstatus blue NO
else
pstatus blue UNKNOWN " unknown value: $( grep -E 'Speculation.?Store.?Bypass:' " $procfs /self/status " 2>/dev/null | cut -d: -f2-) "
2019-04-20 20:27:45 +02:00
fi
if [ " $kernel_ssbd_enabled " = 1 ] ; then
_info_nol "* SSB mitigation currently active for selected processes: "
2019-11-23 13:51:00 +01:00
# silence grep's stderr here to avoid ENOENT errors from processes that have exited since the shell's expansion of the *
2019-11-24 16:47:53 +01:00
mitigated_processes = $( find /proc -mindepth 2 -maxdepth 2 -type f -name status -print0 2>/dev/null \
| xargs -r0 grep -El 'Speculation.?Store.?Bypass:[[:space:]]+thread (force )?mitigated' 2>/dev/null \
| sed s/status/exe/ | xargs -r -n1 readlink -f 2>/dev/null | xargs -r -n1 basename | sort -u | tr "\n" " " | sed 's/ $//' )
2019-04-20 20:27:45 +02:00
if [ -n " $mitigated_processes " ] ; then
pstatus green YES " $mitigated_processes "
else
pstatus yellow NO "no process found using SSB mitigation through prctl"
fi
fi
fi
2018-05-22 09:39:11 +02:00
elif [ " $sys_interface_available " = 0 ] ; then
# we have no sysfs but were asked to use it only!
msg = "/sys vulnerability interface use forced, but it's not available!"
status = UNK
fi
2018-09-17 21:44:22 +02:00
if ! is_cpu_vulnerable " $cve " ; then
2018-05-21 22:01:27 +02:00
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2018-05-22 12:05:46 +02:00
elif [ -z " $msg " ] || [ " $msg " = "Vulnerable" ] ; then
2018-05-22 09:39:11 +02:00
# if msg is empty, sysfs check didn't fill it, rely on our own test
2018-05-23 22:50:52 +02:00
if [ -n " $cpuid_ssbd " ] ; then
2018-05-22 12:05:46 +02:00
if [ -n " $kernel_ssb " ] ; then
2019-04-20 20:27:45 +02:00
if [ " $opt_live " = 1 ] ; then
if [ " $kernel_ssbd_enabled " -gt 0 ] ; then
pvulnstatus $cve OK "your CPU and kernel both support SSBD and mitigation is enabled"
else
pvulnstatus $cve VULN "your CPU and kernel both support SSBD but the mitigation is not active"
fi
else
pvulnstatus $cve OK "your system provides the necessary tools for software mitigation"
fi
2018-05-22 12:05:46 +02:00
else
pvulnstatus $cve VULN "your kernel needs to be updated"
2018-05-23 21:08:58 +02:00
explain "You have a recent-enough CPU microcode but your kernel is too old to use the new features exported by your CPU's microcode. If you're using a distro kernel, upgrade your distro to get the latest kernel available. Otherwise, recompile the kernel from recent-enough sources."
2018-05-22 12:05:46 +02:00
fi
else
if [ -n " $kernel_ssb " ] ; then
pvulnstatus $cve VULN "Your CPU doesn't support SSBD"
2018-05-23 21:08:58 +02:00
explain "Your kernel is recent enough to use the CPU microcode features for mitigation, but your CPU microcode doesn't actually provide the necessary features for the kernel to use. The microcode of your CPU hence needs to be upgraded. This is usually done at boot time by your kernel (the upgrade is not persistent across reboots which is why it's done at each boot). If you're using a distro, make sure you are up to date, as microcode updates are usually shipped alongside with the distro kernel. Availability of a microcode update for you CPU model depends on your CPU vendor. You can usually find out online if a microcode update is available for your CPU by searching for your CPUID (indicated in the Hardware Check section)."
2018-05-22 12:05:46 +02:00
else
pvulnstatus $cve VULN "Neither your CPU nor your kernel support SSBD"
2018-05-23 21:08:58 +02:00
explain "Both your CPU microcode and your kernel are lacking support for mitigation. If you're using a distro kernel, upgrade your distro to get the latest kernel available. Otherwise, recompile the kernel from recent-enough sources. The microcode of your CPU also needs to be upgraded. This is usually done at boot time by your kernel (the upgrade is not persistent across reboots which is why it's done at each boot). If you're using a distro, make sure you are up to date, as microcode updates are usually shipped alongside with the distro kernel. Availability of a microcode update for you CPU model depends on your CPU vendor. You can usually find out online if a microcode update is available for your CPU by searching for your CPUID (indicated in the Hardware Check section)."
2018-05-22 12:05:46 +02:00
fi
fi
2018-05-21 22:01:27 +02:00
else
2018-05-22 09:39:11 +02:00
pvulnstatus $cve " $status " " $msg "
2018-05-21 22:01:27 +02:00
fi
}
2018-09-18 22:00:32 +02:00
check_CVE_2018_3639_bsd( )
{
_info_nol "* Kernel supports speculation store bypass: "
if sysctl hw.spec_store_bypass_disable >/dev/null 2>& 1; then
kernel_ssb = 1
pstatus green YES
else
kernel_ssb = 0
pstatus yellow NO
fi
_info_nol "* Speculation store bypass is administratively enabled: "
ssb_enabled = $( sysctl -n hw.spec_store_bypass_disable 2>/dev/null)
_debug " hw.spec_store_bypass_disable= $ssb_enabled "
case " $ssb_enabled " in
0) pstatus yellow NO "disabled" ; ;
1) pstatus green YES "enabled" ; ;
2) pstatus green YES "auto mode" ; ;
*) pstatus yellow NO "unavailable" ; ;
esac
_info_nol "* Speculation store bypass is currently active: "
ssb_active = $( sysctl -n hw.spec_store_bypass_disable_active 2>/dev/null)
_debug " hw.spec_store_bypass_disable_active= $ssb_active "
case " $ssb_active " in
1) pstatus green YES; ;
*) pstatus yellow NO; ;
esac
if ! is_cpu_vulnerable " $cve " ; then
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2018-09-18 22:00:32 +02:00
else
if [ " $ssb_active " = 1 ] ; then
pvulnstatus $cve OK "SSBD mitigates the vulnerability"
elif [ -n " $cpuid_ssbd " ] ; then
if [ " $kernel_ssb " = 1 ] ; then
2019-11-25 20:58:49 +01:00
pvulnstatus $cve VULN "you need to enable SSBD through sysctl to mitigate the vulnerability"
explain "To enable SSBD right now, you can run \`sysctl hw.spec_store_bypass_disable=2'. To make this change persistent across reboots, you can add 'sysctl hw.spec_store_bypass_disable=2' to /etc/sysctl.conf."
2018-09-18 22:00:32 +02:00
else
pvulnstatus $cve VULN "your kernel needs to be updated"
fi
else
if [ " $kernel_ssb " = 1 ] ; then
pvulnstatus $cve VULN "Your CPU doesn't support SSBD"
else
pvulnstatus $cve VULN "Neither your CPU nor your kernel support SSBD"
fi
fi
fi
}
2018-09-17 21:44:22 +02:00
###########################
# L1TF / FORESHADOW SECTION
# L1 terminal fault (SGX) aka 'Foreshadow'
check_CVE_2018_3615( )
2018-08-15 11:59:23 +02:00
{
2018-09-17 21:44:22 +02:00
cve = 'CVE-2018-3615'
_info " \033[1;34m $cve aka ' $( cve2name " $cve " ) '\033[0m "
_info_nol "* CPU microcode mitigates the vulnerability: "
2019-11-24 19:25:56 +01:00
if { [ " $cpu_flush_cmd " = 1 ] || { [ " $msr_locked_down " = 1 ] && [ " $cpuid_l1df " = 1 ] ; } ; } && [ " $cpuid_sgx " = 1 ] ; then
2018-09-17 21:44:22 +02:00
# no easy way to detect a fixed SGX but we know that
# microcodes that have the FLUSH_CMD MSR also have the
2019-11-24 17:21:20 +01:00
# fixed SGX (for CPUs that support it), because Intel
# delivered fixed microcodes for both issues at the same time
#
# if the system we're running on is locked down (no way to write MSRs),
# make the assumption that if the L1D flush CPUID bit is set, probably
# that FLUSH_CMD MSR is here too
2018-09-17 21:44:22 +02:00
pstatus green YES
elif [ " $cpuid_sgx " = 1 ] ; then
pstatus red NO
else
pstatus blue N/A
fi
if ! is_cpu_vulnerable " $cve " ; then
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2019-11-24 19:25:56 +01:00
elif [ " $cpu_flush_cmd " = 1 ] || { [ " $msr_locked_down " = 1 ] && [ " $cpuid_l1df " = 1 ] ; } ; then
2018-09-17 22:28:04 +02:00
pvulnstatus $cve OK "your CPU microcode mitigates the vulnerability"
2018-09-17 21:44:22 +02:00
else
2018-09-17 22:28:04 +02:00
pvulnstatus $cve VULN "your CPU supports SGX and the microcode is not up to date"
2018-09-17 21:44:22 +02:00
fi
}
# L1 terminal fault (OS) aka 'Foreshadow-NG (OS)'
check_CVE_2018_3620( )
{
cve = 'CVE-2018-3620'
_info " \033[1;34m $cve aka ' $( cve2name " $cve " ) '\033[0m "
2018-09-18 22:06:01 +02:00
if [ " $os " = Linux ] ; then
check_CVE_2018_3620_linux
elif echo " $os " | grep -q BSD; then
check_CVE_2018_3620_bsd
else
_warn " Unsupported OS ( $os ) "
fi
}
2018-08-15 11:59:23 +02:00
2018-09-18 22:06:01 +02:00
check_CVE_2018_3620_linux( )
{
2018-08-15 11:59:23 +02:00
status = UNK
sys_interface_available = 0
msg = ''
2019-05-23 14:27:50 +02:00
if sys_interface_check "/sys/devices/system/cpu/vulnerabilities/l1tf" ; then
2018-08-15 11:59:23 +02:00
# this kernel has the /sys interface, trust it over everything
sys_interface_available = 1
fi
if [ " $opt_sysfs_only " != 1 ] ; then
2018-09-17 21:44:22 +02:00
_info_nol "* Kernel supports PTE inversion: "
2019-05-05 18:34:09 +02:00
if ! command -v " ${ opt_arch_prefix } strings " >/dev/null 2>& 1; then
2019-11-23 14:01:56 +01:00
pstatus yellow UNKNOWN "missing 'strings' tool, please install it"
pteinv_supported = -1
elif [ -n " $kernel_err " ] ; then
pstatus yellow UNKNOWN " $kernel_err "
2018-09-17 21:44:22 +02:00
pteinv_supported = -1
else
if " ${ opt_arch_prefix } strings " " $kernel " | grep -Fq 'PTE Inversion' ; then
pstatus green YES "found in kernel image"
_debug "pteinv: found pte inversion evidence in kernel image"
pteinv_supported = 1
else
pstatus yellow NO
pteinv_supported = 0
fi
fi
_info_nol "* PTE inversion enabled and active: "
if [ " $opt_live " = 1 ] ; then
2019-05-23 14:27:50 +02:00
if [ -n " $fullmsg " ] ; then
if echo " $fullmsg " | grep -q 'Mitigation: PTE Inversion' ; then
2018-09-17 21:44:22 +02:00
pstatus green YES
pteinv_active = 1
else
pstatus yellow NO
pteinv_active = 0
fi
else
pstatus yellow UNKNOWN "sysfs interface not available"
pteinv_active = -1
fi
else
pstatus blue N/A "not testable in offline mode"
fi
2018-08-15 11:59:23 +02:00
elif [ " $sys_interface_available " = 0 ] ; then
# we have no sysfs but were asked to use it only!
msg = "/sys vulnerability interface use forced, but it's not available!"
status = UNK
fi
2018-09-17 21:44:22 +02:00
if ! is_cpu_vulnerable " $cve " ; then
2018-08-15 11:59:23 +02:00
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2018-08-15 11:59:23 +02:00
elif [ -z " $msg " ] ; then
2018-09-17 21:44:22 +02:00
# if msg is empty, sysfs check didn't fill it, rely on our own test
if [ " $pteinv_supported " = 1 ] ; then
if [ " $pteinv_active " = 1 ] || [ " $opt_live " != 1 ] ; then
2019-09-19 12:06:04 +02:00
pvulnstatus $cve OK "PTE inversion mitigates the vulnerability"
2018-09-17 21:44:22 +02:00
else
pvulnstatus $cve VULN "Your kernel supports PTE inversion but it doesn't seem to be enabled"
fi
else
pvulnstatus $cve VULN "Your kernel doesn't support PTE inversion, update it"
fi
2018-08-15 11:59:23 +02:00
else
pvulnstatus $cve " $status " " $msg "
fi
}
2018-09-18 22:06:01 +02:00
check_CVE_2018_3620_bsd( )
{
2018-09-22 12:26:48 +02:00
_info_nol "* Kernel reserved the memory page at physical address 0x0: "
2019-04-19 19:47:04 +02:00
if ! kldstat -q -m vmm; then
kldload vmm 2>/dev/null && kldload_vmm = 1
_debug " attempted to load module vmm, kldload_vmm= $kldload_vmm "
else
_debug "vmm module already loaded"
fi
2018-09-22 12:26:48 +02:00
if sysctl hw.vmm.vmx.l1d_flush >/dev/null 2>& 1; then
# https://security.FreeBSD.org/patches/SA-18:09/l1tf-11.2.patch
# this is very difficult to detect that the kernel reserved the 0 page, but this fix
# is part of the exact same patch than the other L1TF CVE, so we detect it
# and deem it as OK if the other patch is there
pstatus green YES
bsd_zero_reserved = 1
else
pstatus yellow NO
bsd_zero_reserved = 0
fi
2018-09-18 22:06:01 +02:00
if ! is_cpu_vulnerable " $cve " ; then
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2018-09-18 22:06:01 +02:00
else
2018-09-22 12:26:48 +02:00
if [ " $bsd_zero_reserved " = 1 ] ; then
pvulnstatus $cve OK "kernel mitigates the vulnerability"
else
pvulnstatus $cve VULN "your kernel needs to be updated"
fi
2018-09-18 22:06:01 +02:00
fi
}
2018-09-17 21:44:22 +02:00
# L1TF VMM
check_CVE_2018_3646( )
{
cve = 'CVE-2018-3646'
_info " \033[1;34m $cve aka ' $( cve2name " $cve " ) '\033[0m "
2018-09-18 22:06:01 +02:00
if [ " $os " = Linux ] ; then
check_CVE_2018_3646_linux
elif echo " $os " | grep -q BSD; then
check_CVE_2018_3646_bsd
else
_warn " Unsupported OS ( $os ) "
fi
}
2018-09-17 21:44:22 +02:00
2018-09-18 22:06:01 +02:00
check_CVE_2018_3646_linux( )
{
2018-09-17 21:44:22 +02:00
status = UNK
sys_interface_available = 0
msg = ''
2019-05-23 14:27:50 +02:00
if sys_interface_check "/sys/devices/system/cpu/vulnerabilities/l1tf" '.*' quiet; then
2018-09-17 21:44:22 +02:00
# this kernel has the /sys interface, trust it over everything
sys_interface_available = 1
fi
2019-05-15 00:21:08 +02:00
l1d_mode = -1
2018-09-17 21:44:22 +02:00
if [ " $opt_sysfs_only " != 1 ] ; then
2019-11-24 19:25:56 +01:00
check_has_vmm
2018-09-17 21:44:22 +02:00
_info "* Mitigation 1 (KVM)"
_info_nol " * EPT is disabled: "
2022-03-20 12:05:33 +01:00
ept_disabled = -1
2018-09-17 21:44:22 +02:00
if [ " $opt_live " = 1 ] ; then
if ! [ -r /sys/module/kvm_intel/parameters/ept ] ; then
pstatus blue N/A "the kvm_intel module is not loaded"
elif [ " $( cat /sys/module/kvm_intel/parameters/ept) " = N ] ; then
pstatus green YES
ept_disabled = 1
else
pstatus yellow NO
fi
else
pstatus blue N/A "not testable in offline mode"
fi
_info "* Mitigation 2"
_info_nol " * L1D flush is supported by kernel: "
2018-09-17 22:26:20 +02:00
if [ " $opt_live " = 1 ] && grep -qw flush_l1d " $procfs /cpuinfo " ; then
l1d_kernel = " found flush_l1d in $procfs /cpuinfo "
2018-09-17 21:44:22 +02:00
fi
if [ -z " $l1d_kernel " ] ; then
2019-05-05 18:34:09 +02:00
if ! command -v " ${ opt_arch_prefix } strings " >/dev/null 2>& 1; then
2018-09-17 21:44:22 +02:00
l1d_kernel_err = " missing ' ${ opt_arch_prefix } strings' tool, please install it, usually it's in the binutils package "
elif [ -n " $kernel_err " ] ; then
l1d_kernel_err = " $kernel_err "
elif " ${ opt_arch_prefix } strings " " $kernel " | grep -qw flush_l1d; then
l1d_kernel = 'found flush_l1d in kernel image'
fi
fi
if [ -n " $l1d_kernel " ] ; then
pstatus green YES " $l1d_kernel "
elif [ -n " $l1d_kernel_err " ] ; then
pstatus yellow UNKNOWN " $l1d_kernel_err "
else
pstatus yellow NO
fi
_info_nol " * L1D flush enabled: "
if [ " $opt_live " = 1 ] ; then
2019-05-23 14:27:50 +02:00
if [ -n " $fullmsg " ] ; then
2018-09-29 13:00:42 +02:00
# vanilla: VMX: $l1dstatus, SMT $smtstatus
# Red Hat: VMX: SMT $smtstatus, L1D $l1dstatus
# $l1dstatus is one of (auto|vulnerable|conditional cache flushes|cache flushes|EPT disabled|flush not necessary)
# $smtstatus is one of (vulnerable|disabled)
2019-05-23 14:27:50 +02:00
# can also just be "Not affected"
if echo " $fullmsg " | grep -Eq -e 'Not affected' -e '(VMX:|L1D) (EPT disabled|vulnerable|flush not necessary)' ; then
2018-09-17 21:44:22 +02:00
l1d_mode = 0
pstatus yellow NO
2019-05-23 14:27:50 +02:00
elif echo " $fullmsg " | grep -Eq '(VMX:|L1D) conditional cache flushes' ; then
2018-09-17 21:44:22 +02:00
l1d_mode = 1
pstatus green YES "conditional flushes"
2019-05-23 14:27:50 +02:00
elif echo " $fullmsg " | grep -Eq '(VMX:|L1D) cache flushes' ; then
2018-09-17 21:44:22 +02:00
l1d_mode = 2
pstatus green YES "unconditional flushes"
else
2019-05-07 20:35:52 +02:00
if is_xen_dom0; then
l1d_xen_hardware = $( xl dmesg | grep 'Hardware features:' | grep 'L1D_FLUSH' | head -1)
l1d_xen_hypervisor = $( xl dmesg | grep 'Xen settings:' | grep 'L1D_FLUSH' | head -1)
l1d_xen_pv_domU = $( xl dmesg | grep 'PV L1TF shadowing:' | grep 'DomU enabled' | head -1)
if [ -n " $l1d_xen_hardware " ] && [ -n " $l1d_xen_hypervisor " ] && [ -n " $l1d_xen_pv_domU " ] ; then
l1d_mode = 5
pstatus green YES "for XEN guests"
elif [ -n " $l1d_xen_hardware " ] && [ -n " $l1d_xen_hypervisor " ] ; then
l1d_mode = 4
pstatus yellow YES "for XEN guests (HVM only)"
elif [ -n " $l1d_xen_pv_domU " ] ; then
l1d_mode = 3
pstatus yellow YES "for XEN guests (PV only)"
else
l1d_mode = 0
pstatus yellow NO "for XEN guests"
fi
else
l1d_mode = -1
pstatus yellow UNKNOWN "unrecognized mode"
fi
2018-09-17 21:44:22 +02:00
fi
else
2018-12-10 19:33:07 +01:00
l1d_mode = -1
2018-09-17 21:44:22 +02:00
pstatus yellow UNKNOWN "can't find or read /sys/devices/system/cpu/vulnerabilities/l1tf"
fi
else
2018-12-10 19:33:07 +01:00
l1d_mode = -1
2018-09-17 21:44:22 +02:00
pstatus blue N/A "not testable in offline mode"
fi
_info_nol " * Hardware-backed L1D flush supported: "
if [ " $opt_live " = 1 ] ; then
2019-05-07 20:35:52 +02:00
if grep -qw flush_l1d " $procfs /cpuinfo " || [ -n " $l1d_xen_hardware " ] ; then
2018-09-17 21:44:22 +02:00
pstatus green YES "performance impact of the mitigation will be greatly reduced"
else
pstatus blue NO "flush will be done in software, this is slower"
fi
else
pstatus blue N/A "not testable in offline mode"
fi
_info_nol " * Hyper-Threading (SMT) is enabled: "
is_cpu_smt_enabled; smt_enabled = $?
if [ " $smt_enabled " = 0 ] ; then
pstatus yellow YES
elif [ " $smt_enabled " = 1 ] ; then
pstatus green NO
else
pstatus yellow UNKNOWN
fi
elif [ " $sys_interface_available " = 0 ] ; then
# we have no sysfs but were asked to use it only!
msg = "/sys vulnerability interface use forced, but it's not available!"
status = UNK
2018-12-10 19:33:07 +01:00
l1d_mode = -1
2018-09-17 21:44:22 +02:00
fi
if ! is_cpu_vulnerable " $cve " ; then
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2019-05-23 14:27:50 +02:00
elif [ " $fullmsg " = "Not affected" ] ; then
# just in case a very recent kernel knows better than we do
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your kernel reported your CPU model as not affected"
2018-09-17 21:44:22 +02:00
elif [ " $has_vmm " = 0 ] ; then
2018-12-10 19:33:07 +01:00
pvulnstatus $cve OK "this system is not running a hypervisor"
2018-09-17 21:44:22 +02:00
else
if [ " $ept_disabled " = 1 ] ; then
pvulnstatus $cve OK "EPT is disabled which mitigates the vulnerability"
elif [ " $opt_paranoid " = 0 ] ; then
if [ " $l1d_mode " -ge 1 ] ; then
pvulnstatus $cve OK "L1D flushing is enabled and mitigates the vulnerability"
else
2019-05-15 00:21:08 +02:00
pvulnstatus $cve VULN "disable EPT or enable L1D flushing to mitigate the vulnerability"
2018-09-17 21:44:22 +02:00
fi
else
if [ " $l1d_mode " -ge 2 ] ; then
if [ " $smt_enabled " = 1 ] ; then
pvulnstatus $cve OK "L1D unconditional flushing and Hyper-Threading disabled are mitigating the vulnerability"
else
pvulnstatus $cve VULN "Hyper-Threading must be disabled to fully mitigate the vulnerability"
fi
else
if [ " $smt_enabled " = 1 ] ; then
pvulnstatus $cve VULN "L1D unconditional flushing should be enabled to fully mitigate the vulnerability"
else
pvulnstatus $cve VULN "enable L1D unconditional flushing and disable Hyper-Threading to fully mitigate the vulnerability"
fi
fi
fi
2019-05-07 20:35:52 +02:00
if [ $l1d_mode -gt 3 ] ; then
_warn
_warn "This host is a Xen Dom0. Please make sure that you are running your DomUs"
_warn "with a kernel which contains CVE-2018-3646 mitigations."
_warn
_warn "See https://www.suse.com/support/kb/doc/?id=7023078 and XSA-273 for details."
fi
2018-09-17 21:44:22 +02:00
fi
}
2018-09-18 22:06:01 +02:00
check_CVE_2018_3646_bsd( )
{
2018-09-22 12:26:48 +02:00
_info_nol "* Kernel supports L1D flushing: "
if sysctl hw.vmm.vmx.l1d_flush >/dev/null 2>& 1; then
pstatus green YES
kernel_l1d_supported = 1
else
pstatus yellow NO
kernel_l1d_supported = 0
fi
_info_nol "* L1D flushing is enabled: "
kernel_l1d_enabled = $( sysctl -n hw.vmm.vmx.l1d_flush 2>/dev/null)
case " $kernel_l1d_enabled " in
0) pstatus yellow NO; ;
1) pstatus green YES; ;
"" ) pstatus yellow NO; ;
*) pstatus yellow UNKNOWN; ;
esac
2018-09-18 22:06:01 +02:00
if ! is_cpu_vulnerable " $cve " ; then
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2018-09-18 22:06:01 +02:00
else
2018-09-22 12:26:48 +02:00
if [ " $kernel_l1d_enabled " = 1 ] ; then
pvulnstatus $cve OK "L1D flushing mitigates the vulnerability"
elif [ " $kernel_l1d_supported " = 1 ] ; then
pvulnstatus $cve VULN "L1D flushing is supported by your kernel but is disabled"
else
pvulnstatus $cve VULN "your kernel needs to be updated"
fi
2018-09-18 22:06:01 +02:00
fi
}
2019-05-14 19:21:20 +02:00
###################
# MSBDS SECTION
# Microarchitectural Store Buffer Data Sampling
check_CVE_2018_12126( )
{
2019-05-15 00:21:08 +02:00
cve = 'CVE-2018-12126'
check_mds $cve
2019-05-14 19:21:20 +02:00
}
###################
# MFBDS SECTION
# Microarchitectural Fill Buffer Data Sampling
check_CVE_2018_12130( )
2019-05-15 00:21:08 +02:00
{
cve = 'CVE-2018-12130'
check_mds $cve
2019-05-14 19:21:20 +02:00
}
###################
# MLPDS SECTION
# Microarchitectural Load Port Data Sampling
check_CVE_2018_12127( )
2019-05-15 00:21:08 +02:00
{
cve = 'CVE-2018-12127'
check_mds $cve
2019-05-14 19:21:20 +02:00
}
###################
# MDSUM SECTION
# Microarchitectural Data Sampling Uncacheable Memory
check_CVE_2019_11091( )
2019-05-15 00:21:08 +02:00
{
cve = 'CVE-2019-11091'
check_mds $cve
2019-05-14 19:21:20 +02:00
}
# Microarchitectural Data Sampling
check_mds( )
{
cve = $1
_info " \033[1;34m $cve aka ' $( cve2name " $cve " ) '\033[0m "
2019-05-15 20:45:28 +02:00
if [ " $os " = Linux ] ; then
check_mds_linux " $cve "
elif echo " $os " | grep -q BSD; then
check_mds_bsd " $cve "
else
_warn " Unsupported OS ( $os ) "
fi
}
check_mds_bsd( )
{
_info_nol "* Kernel supports using MD_CLEAR mitigation: "
if [ " $opt_live " = 1 ] ; then
if sysctl hw.mds_disable >/dev/null 2>& 1; then
pstatus green YES
kernel_md_clear = 1
else
pstatus yellow NO
kernel_md_clear = 0
fi
else
2020-02-06 19:54:27 +01:00
if grep -Fq hw.mds_disable $opt_kernel ; then
pstatus green YES
kernel_md_clear = 1
2019-05-15 20:45:28 +02:00
else
2020-02-06 19:54:27 +01:00
kernel_md_clear = 0
pstatus yellow NO
2019-05-15 20:45:28 +02:00
fi
fi
_info_nol "* CPU Hyper-Threading (SMT) is disabled: "
if sysctl machdep.hyperthreading_allowed >/dev/null 2>& 1; then
kernel_smt_allowed = $( sysctl -n machdep.hyperthreading_allowed 2>/dev/null)
if [ " $kernel_smt_allowed " = 1 ] ; then
pstatus yellow NO
else
pstatus green YES
fi
else
pstatus yellow UNKNOWN "sysctl machdep.hyperthreading_allowed doesn't exist"
fi
_info_nol "* Kernel mitigation is enabled: "
if [ " $kernel_md_clear " = 1 ] ; then
kernel_mds_enabled = $( sysctl -n hw.mds_disable 2>/dev/null)
else
kernel_mds_enabled = 0
fi
case " $kernel_mds_enabled " in
0) pstatus yellow NO; ;
1) pstatus green YES "with microcode support" ; ;
2) pstatus green YES "software-only support (SLOW)" ; ;
3) pstatus green YES; ;
*) pstatus yellow UNKNOWN " unknown value $kernel_mds_enabled "
esac
_info_nol "* Kernel mitigation is active: "
if [ " $kernel_md_clear " = 1 ] ; then
kernel_mds_state = $( sysctl -n hw.mds_disable_state 2>/dev/null)
else
kernel_mds_state = inactive
fi
# https://github.com/freebsd/freebsd/blob/master/sys/x86/x86/cpu_machdep.c#L953
case " $kernel_mds_state " in
inactive) pstatus yellow NO; ;
VERW) pstatus green YES "with microcode support" ; ;
software*) pstatus green YES "software-only support (SLOW)" ; ;
*) pstatus yellow UNKNOWN
esac
2019-05-14 19:21:20 +02:00
2019-05-15 20:45:28 +02:00
if ! is_cpu_vulnerable " $cve " ; then
2022-03-20 13:16:27 +01:00
pvulnstatus " $cve " OK "your CPU vendor reported your CPU model as not affected"
2019-05-15 20:45:28 +02:00
else
if [ " $cpuid_md_clear " = 1 ] ; then
if [ " $kernel_md_clear " = 1 ] ; then
if [ " $opt_live " = 1 ] ; then
# mitigation must also be enabled
if [ " $kernel_mds_enabled " -ge 1 ] ; then
if [ " $opt_paranoid " != 1 ] || [ " $kernel_smt_allowed " = 0 ] ; then
pvulnstatus " $cve " OK "Your microcode and kernel are both up to date for this mitigation, and mitigation is enabled"
else
2020-04-03 10:19:25 +02:00
pvulnstatus " $cve " VULN "Your microcode and kernel are both up to date for this mitigation, but you must disable SMT (Hyper-Threading) for a complete mitigation"
2019-05-15 20:45:28 +02:00
fi
else
pvulnstatus " $cve " VULN "Your microcode and kernel are both up to date for this mitigation, but the mitigation is not active"
2019-11-25 20:58:49 +01:00
explain "To enable mitigation, run \`sysctl hw.mds_disable=1'. To make this change persistent across reboots, you can add 'hw.mds_disable=1' to /etc/sysctl.conf."
2019-05-15 20:45:28 +02:00
fi
else
pvulnstatus " $cve " OK "Your microcode and kernel are both up to date for this mitigation"
fi
else
pvulnstatus " $cve " VULN "Your microcode supports mitigation, but your kernel doesn't, upgrade it to mitigate the vulnerability"
fi
else
if [ " $kernel_md_clear " = 1 ] ; then
pvulnstatus " $cve " VULN "Your kernel supports mitigation, but your CPU microcode also needs to be updated to mitigate the vulnerability"
else
pvulnstatus " $cve " VULN "Neither your kernel or your microcode support mitigation, upgrade both to mitigate the vulnerability"
fi
fi
fi
}
check_mds_linux( )
{
2019-05-15 00:21:08 +02:00
status = UNK
sys_interface_available = 0
msg = ''
if sys_interface_check "/sys/devices/system/cpu/vulnerabilities/mds" '^[^;]+' ; then
2019-05-14 19:21:20 +02:00
sys_interface_available = 1
fi
2019-09-22 04:02:22 +02:00
2019-05-15 00:21:08 +02:00
if [ " $opt_sysfs_only " != 1 ] ; then
_info_nol "* Kernel supports using MD_CLEAR mitigation: "
kernel_md_clear = ''
kernel_md_clear_can_tell = 1
2022-03-20 11:04:57 +01:00
if [ " $opt_live " = 1 ] && grep ^flags " $procfs /cpuinfo " | grep -qw md_clear; then
2019-05-15 00:21:08 +02:00
kernel_md_clear = " md_clear found in $procfs /cpuinfo "
pstatus green YES " $kernel_md_clear "
fi
if [ -z " $kernel_md_clear " ] ; then
if ! command -v " ${ opt_arch_prefix } strings " >/dev/null 2>& 1; then
kernel_md_clear_can_tell = 0
elif [ -n " $kernel_err " ] ; then
kernel_md_clear_can_tell = 0
elif " ${ opt_arch_prefix } strings " " $kernel " | grep -q 'Clear CPU buffers' ; then
_debug "md_clear: found 'Clear CPU buffers' string in kernel image"
kernel_md_clear = 'found md_clear implementation evidence in kernel image'
pstatus green YES " $kernel_md_clear "
fi
fi
if [ -z " $kernel_md_clear " ] ; then
if [ " $kernel_md_clear_can_tell " = 1 ] ; then
pstatus yellow NO
2019-05-14 19:21:20 +02:00
else
2019-05-15 00:21:08 +02:00
pstatus yellow UNKNOWN
2019-05-14 19:21:20 +02:00
fi
fi
2019-05-15 00:21:08 +02:00
if [ " $opt_live " = 1 ] && [ " $sys_interface_available " = 1 ] ; then
_info_nol "* Kernel mitigation is enabled and active: "
2019-05-23 14:27:50 +02:00
if echo " $fullmsg " | grep -qi ^mitigation; then
2019-05-15 00:21:08 +02:00
mds_mitigated = 1
pstatus green YES
else
mds_mitigated = 0
pstatus yellow NO
fi
_info_nol "* SMT is either mitigated or disabled: "
2019-05-23 14:27:50 +02:00
if echo " $fullmsg " | grep -Eq 'SMT (disabled|mitigated)' ; then
2019-05-15 00:21:08 +02:00
mds_smt_mitigated = 1
pstatus green YES
else
mds_smt_mitigated = 0
pstatus yellow NO
fi
2019-05-14 19:21:20 +02:00
fi
2019-05-15 00:21:08 +02:00
elif [ " $sys_interface_available " = 0 ] ; then
# we have no sysfs but were asked to use it only!
msg = "/sys vulnerability interface use forced, but it's not available!"
status = UNK
2019-05-14 19:21:20 +02:00
fi
2019-05-15 00:21:08 +02:00
if ! is_cpu_vulnerable " $cve " ; then
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus " $cve " OK "your CPU vendor reported your CPU model as not affected"
2019-09-22 04:02:22 +02:00
else
if [ " $opt_sysfs_only " != 1 ] ; then
# compute mystatus and mymsg from our own logic
if [ " $cpuid_md_clear " = 1 ] ; then
if [ -n " $kernel_md_clear " ] ; then
if [ " $opt_live " = 1 ] ; then
# mitigation must also be enabled
if [ " $mds_mitigated " = 1 ] ; then
if [ " $opt_paranoid " != 1 ] || [ " $mds_smt_mitigated " = 1 ] ; then
mystatus = OK
mymsg = "Your microcode and kernel are both up to date for this mitigation, and mitigation is enabled"
else
mystatus = VULN
2020-04-03 10:19:25 +02:00
mymsg = "Your microcode and kernel are both up to date for this mitigation, but you must disable SMT (Hyper-Threading) for a complete mitigation"
2019-09-22 04:02:22 +02:00
fi
2019-05-15 00:21:08 +02:00
else
2019-09-22 04:02:22 +02:00
mystatus = VULN
mymsg = "Your microcode and kernel are both up to date for this mitigation, but the mitigation is not active"
2019-05-15 00:21:08 +02:00
fi
else
2019-09-22 04:02:22 +02:00
mystatus = OK
mymsg = "Your microcode and kernel are both up to date for this mitigation"
2019-05-15 00:21:08 +02:00
fi
else
2019-09-22 04:02:22 +02:00
mystatus = VULN
mymsg = "Your microcode supports mitigation, but your kernel doesn't, upgrade it to mitigate the vulnerability"
2019-05-15 00:21:08 +02:00
fi
else
2019-09-22 04:02:22 +02:00
if [ -n " $kernel_md_clear " ] ; then
mystatus = VULN
mymsg = "Your kernel supports mitigation, but your CPU microcode also needs to be updated to mitigate the vulnerability"
else
mystatus = VULN
mymsg = "Neither your kernel or your microcode support mitigation, upgrade both to mitigate the vulnerability"
fi
2019-05-15 00:21:08 +02:00
fi
else
2019-09-22 04:02:22 +02:00
# sysfs only: return the status/msg we got
2019-05-15 00:21:08 +02:00
pvulnstatus " $cve " " $status " " $fullmsg "
2019-09-22 04:02:22 +02:00
return
fi
# if we didn't get a msg+status from sysfs, use ours
if [ -z " $msg " ] ; then
pvulnstatus " $cve " " $mystatus " " $mymsg "
elif [ " $opt_paranoid " = 1 ] ; then
# if paranoid mode is enabled, we now that we won't agree on status, so take ours
pvulnstatus " $cve " " $mystatus " " $mymsg "
elif [ " $status " = " $mystatus " ] ; then
# if we agree on status, we'll print the common status and our message (more detailed than the sysfs one)
pvulnstatus " $cve " " $status " " $mymsg "
else
# if we don't agree on status, maybe our logic is flawed due to a new kernel/mitigation? use the one from sysfs
pvulnstatus " $cve " " $status " " $msg "
2019-05-15 00:21:08 +02:00
fi
2019-05-14 19:21:20 +02:00
fi
}
2019-11-12 18:30:36 +01:00
###################
# TAA SECTION
# Transactional Synchronization Extension (TSX) Asynchronous Abort
check_CVE_2019_11135( )
{
cve = 'CVE-2019-11135'
2019-11-13 01:07:10 +01:00
_info " \033[1;34m $cve aka ' $( cve2name " $cve " ) '\033[0m "
if [ " $os " = Linux ] ; then
check_CVE_2019_11135_linux
#elif echo "$os" | grep -q BSD; then
# check_CVE_2019_11135_bsd
else
_warn " Unsupported OS ( $os ) "
fi
2019-11-12 18:30:36 +01:00
}
2019-11-13 01:07:10 +01:00
check_CVE_2019_11135_linux( )
2019-11-12 18:30:36 +01:00
{
2019-11-13 01:07:10 +01:00
status = UNK
2019-11-12 18:30:36 +01:00
sys_interface_available = 0
2019-11-13 01:07:10 +01:00
msg = ''
if sys_interface_check "/sys/devices/system/cpu/vulnerabilities/tsx_async_abort" ; then
2019-11-12 18:30:36 +01:00
# this kernel has the /sys interface, trust it over everything
sys_interface_available = 1
fi
2019-11-13 01:07:10 +01:00
if [ " $opt_sysfs_only " != 1 ] ; then
_info_nol "* TAA mitigation is supported by kernel: "
kernel_taa = ''
if [ -n " $kernel_err " ] ; then
kernel_taa_err = " $kernel_err "
elif grep -q 'tsx_async_abort' " $kernel " ; then
kernel_taa = "found tsx_async_abort in kernel image"
fi
if [ -n " $kernel_taa " ] ; then
pstatus green YES " $kernel_taa "
elif [ -n " $kernel_taa_err " ] ; then
pstatus yellow UNKNOWN " $kernel_taa_err "
else
pstatus yellow NO
fi
2019-11-12 18:30:36 +01:00
2019-11-13 01:07:10 +01:00
_info_nol "* TAA mitigation enabled and active: "
if [ " $opt_live " = 1 ] ; then
if [ -n " $fullmsg " ] ; then
if echo " $fullmsg " | grep -qE '^Mitigation' ; then
pstatus green YES " $fullmsg "
else
pstatus yellow NO
fi
2019-11-12 18:30:36 +01:00
else
2019-11-13 01:07:10 +01:00
pstatus yellow NO "tsx_async_abort not found in sysfs hierarchy"
2019-11-12 18:30:36 +01:00
fi
else
2019-11-13 01:07:10 +01:00
pstatus blue N/A "not testable in offline mode"
2019-11-12 18:30:36 +01:00
fi
2019-11-13 01:07:10 +01:00
elif [ " $sys_interface_available " = 0 ] ; then
# we have no sysfs but were asked to use it only!
msg = "/sys vulnerability interface use forced, but it's not available!"
status = UNK
2019-11-12 18:30:36 +01:00
fi
2019-11-13 01:07:10 +01:00
if ! is_cpu_vulnerable " $cve " ; then
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus " $cve " OK "your CPU vendor reported your CPU model as not affected"
2019-11-13 01:07:10 +01:00
elif [ -z " $msg " ] ; then
# if msg is empty, sysfs check didn't fill it, rely on our own test
if [ " $opt_live " = 1 ] ; then
# if we're in live mode and $msg is empty, sysfs file is not there so kernel is too old
pvulnstatus $cve VULN "Your kernel doesn't support TAA mitigation, update it"
else
if [ -n " $kernel_taa " ] ; then
pvulnstatus $cve OK "Your kernel supports TAA mitigation"
else
pvulnstatus $cve VULN "Your kernel doesn't support TAA mitigation, update it"
fi
fi
2019-11-12 18:30:36 +01:00
else
2019-11-13 01:07:10 +01:00
if [ " $opt_paranoid " = 1 ] ; then
# in paranoid mode, TSX or SMT enabled are not OK, even if TAA is mitigated
if ! echo " $fullmsg " | grep -qF 'TSX disabled' ; then
pvulnstatus $cve VULN "TSX must be disabled for full mitigation"
elif echo " $fullmsg " | grep -qF 'SMT vulnerable' ; then
pvulnstatus $cve VULN "SMT (HyperThreading) must be disabled for full mitigation"
else
pvulnstatus $cve " $status " " $msg "
fi
else
pvulnstatus $cve " $status " " $msg "
fi
2019-11-12 18:30:36 +01:00
fi
}
2019-11-24 19:25:56 +01:00
#######################
# iTLB Multihit section
check_CVE_2018_12207( )
{
cve = 'CVE-2018-12207'
_info " \033[1;34m $cve aka ' $( cve2name " $cve " ) '\033[0m "
if [ " $os " = Linux ] ; then
check_CVE_2018_12207_linux
2022-03-20 13:05:48 +01:00
elif echo " $os " | grep -q BSD; then
check_CVE_2018_12207_bsd
2019-11-24 19:25:56 +01:00
else
_warn " Unsupported OS ( $os ) "
fi
}
check_CVE_2018_12207_linux( )
{
status = UNK
sys_interface_available = 0
msg = ''
if sys_interface_check "/sys/devices/system/cpu/vulnerabilities/itlb_multihit" ; then
# this kernel has the /sys interface, trust it over everything
sys_interface_available = 1
fi
if [ " $opt_sysfs_only " != 1 ] ; then
check_has_vmm
_info_nol "* iTLB Multihit mitigation is supported by kernel: "
kernel_itlbmh = ''
if [ -n " $kernel_err " ] ; then
kernel_itlbmh_err = " $kernel_err "
# commit 5219505fcbb640e273a0d51c19c38de0100ec5a9
elif grep -q 'itlb_multihit' " $kernel " ; then
kernel_itlbmh = "found itlb_multihit in kernel image"
fi
if [ -n " $kernel_itlbmh " ] ; then
pstatus green YES " $kernel_itlbmh "
elif [ -n " $kernel_itlbmh_err " ] ; then
pstatus yellow UNKNOWN " $kernel_itlbmh_err "
else
pstatus yellow NO
fi
_info_nol "* iTLB Multihit mitigation enabled and active: "
if [ " $opt_live " = 1 ] ; then
if [ -n " $fullmsg " ] ; then
if echo " $fullmsg " | grep -qF 'Mitigation' ; then
pstatus green YES " $fullmsg "
else
pstatus yellow NO
fi
else
pstatus yellow NO "itlb_multihit not found in sysfs hierarchy"
fi
else
pstatus blue N/A "not testable in offline mode"
fi
elif [ " $sys_interface_available " = 0 ] ; then
# we have no sysfs but were asked to use it only!
msg = "/sys vulnerability interface use forced, but it's not available!"
status = UNK
fi
if ! is_cpu_vulnerable " $cve " ; then
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus " $cve " OK "your CPU vendor reported your CPU model as not affected"
2019-11-24 19:25:56 +01:00
elif [ " $has_vmm " = 0 ] ; then
pvulnstatus " $cve " OK "this system is not running a hypervisor"
elif [ -z " $msg " ] ; then
# if msg is empty, sysfs check didn't fill it, rely on our own test
if [ " $opt_live " = 1 ] ; then
# if we're in live mode and $msg is empty, sysfs file is not there so kernel is too old
pvulnstatus $cve VULN "Your kernel doesn't support iTLB Multihit mitigation, update it"
else
if [ -n " $kernel_itlbmh " ] ; then
pvulnstatus $cve OK "Your kernel supports iTLB Multihit mitigation"
else
pvulnstatus $cve VULN "Your kernel doesn't support iTLB Multihit mitigation, update it"
fi
fi
else
pvulnstatus $cve " $status " " $msg "
fi
}
2022-03-20 13:05:48 +01:00
check_CVE_2018_12207_bsd( )
{
_info_nol "* Kernel supports disabling superpages for executable mappings under EPT: "
kernel_2m_x_ept = $( sysctl -n vm.pmap.allow_2m_x_ept 2>/dev/null)
if [ -z " $kernel_2m_x_ept " ] ; then
pstatus yellow NO
else
pstatus green YES
fi
_info_nol "* Superpages are disabled for executable mappings under EPT: "
if [ " $kernel_2m_x_ept " = 0 ] ; then
pstatus green YES
else
pstatus yellow NO
fi
if ! is_cpu_vulnerable " $cve " ; then
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus $cve OK "your CPU vendor reported your CPU model as not affected"
2022-03-20 13:05:48 +01:00
elif [ -z " $kernel_2m_x_ept " ] ; then
pvulnstatus $cve VULN "Your kernel doesn't support mitigating this CVE, you should update it"
elif [ " $kernel_2m_x_ept " != 0 ] ; then
pvulnstatus $cve VULN "Your kernel supports mitigating this CVE, but the mitigation is disabled"
explain "To enable the mitigation, use \`sysctl vm.pmap.allow_2m_x_ept=0\`"
else
pvulnstatus $cve OK "Your kernel has support for mitigation and the mitigation is enabled"
fi
}
2020-04-16 12:59:28 +02:00
###################
# SRBDS SECTION
# Special Register Buffer Data Sampling (SRBDS)
check_CVE_2020_0543( )
{
cve = 'CVE-2020-0543'
_info " \033[1;34m $cve aka ' $( cve2name " $cve " ) '\033[0m "
if [ " $os " = Linux ] ; then
check_CVE_2020_0543_linux
else
_warn " Unsupported OS ( $os ) "
fi
}
check_CVE_2020_0543_linux( )
{
2020-06-09 22:43:36 +02:00
status = UNK
sys_interface_available = 0
msg = ''
if sys_interface_check "/sys/devices/system/cpu/vulnerabilities/srbds" ; then
# this kernel has the /sys interface, trust it over everything
sys_interface_available = 1
fi
if [ " $opt_sysfs_only " != 1 ] ; then
_info_nol "* SRBDS mitigation control is supported by the kernel: "
kernel_srbds = ''
if [ -n " $kernel_err " ] ; then
kernel_srbds_err = " $kernel_err "
elif grep -q 'Dependent on hypervisor' " $kernel " ; then
kernel_srbds = "found SRBDS implementation evidence in kernel image. Your kernel is up to date for SRBDS mitigation"
fi
if [ -n " $kernel_srbds " ] ; then
pstatus green YES " $kernel_srbds "
elif [ -n " $kernel_srbds_err " ] ; then
pstatus yellow UNKNOWN " $kernel_srbds_err "
else
pstatus yellow NO
fi
_info_nol "* SRBDS mitigation control is enabled and active: "
if [ " $opt_live " = 1 ] ; then
if [ -n " $fullmsg " ] ; then
if echo " $fullmsg " | grep -qE '^Mitigation' ; then
pstatus green YES " $fullmsg "
else
pstatus yellow NO
fi
else
pstatus yellow NO "SRBDS not found in sysfs hierarchy"
fi
else
pstatus blue N/A "not testable in offline mode"
fi
elif [ " $sys_interface_available " = 0 ] ; then
# we have no sysfs but were asked to use it only!
msg = "/sys vulnerability interface use forced, but it's not available!"
status = UNK
fi
if ! is_cpu_vulnerable " $cve " ; then
# override status & msg in case CPU is not vulnerable after all
2022-03-20 13:16:27 +01:00
pvulnstatus " $cve " OK "your CPU vendor reported your CPU model as not affected"
2020-06-09 22:43:36 +02:00
else
if [ " $opt_sysfs_only " != 1 ] ; then
if [ " $cpuid_srbds " = 1 ] ; then
# SRBDS mitigation control exists
if [ " $srbds_on " = 1 ] ; then
# SRBDS mitigation control is enabled
if [ -z " $msg " ] ; then
# if msg is empty, sysfs check didn't fill it, rely on our own test
if [ " $opt_live " = 1 ] ; then
# if we're in live mode and $msg is empty, sysfs file is not there so kernel is too old
pvulnstatus " $cve " OK "Your microcode is up to date for SRBDS mitigation control. The kernel needs to be updated"
fi
else
if [ -n " $kernel_srbds " ] ; then
pvulnstatus " $cve " OK "Your microcode and kernel are both up to date for SRBDS mitigation control. Mitigation is enabled"
else
pvulnstatus " $cve " OK "Your microcode is up to date for SRBDS mitigation control. The kernel needs to be updated"
fi
fi
elif [ " $srbds_on " = 0 ] ; then
# SRBDS mitigation control is disabled
if [ -z " $msg " ] ; then
if [ " $opt_live " = 1 ] ; then
# if we're in live mode and $msg is empty, sysfs file is not there so kernel is too old
pvulnstatus " $cve " VULN "Your microcode is up to date for SRBDS mitigation control. The kernel needs to be updated. Mitigation is disabled"
fi
else
if [ -n " $kernel_srbds " ] ; then
pvulnstatus " $cve " VULN "Your microcode and kernel are both up to date for SRBDS mitigation control. Mitigation is disabled"
else
pvulnstatus " $cve " VULN "Your microcode is up to date for SRBDS mitigation control. The kernel needs to be updated. Mitigation is disabled"
fi
fi
else
# rdmsr: CPU 0 cannot read MSR 0x00000123
pvulnstatus " $cve " UNK "Not able to enumerate MSR for SRBDS mitigation control"
fi
else
# [ $cpuid_srbds != 1 ]
pvulnstatus " $cve " VULN "Your CPU microcode may need to be updated to mitigate the vulnerability"
fi
else
# sysfs only: return the status/msg we got
pvulnstatus " $cve " " $status " " $fullmsg "
return
fi
fi
2020-04-16 12:59:28 +02:00
}
2019-11-24 19:25:56 +01:00
#######################
# END OF VULNS SECTIONS
2018-04-03 19:34:24 +02:00
if [ " $opt_no_hw " = 0 ] && [ -z " $opt_arch_prefix " ] ; then
check_cpu
check_cpu_vulnerabilities
_info
fi
2018-03-17 16:13:37 +01:00
2018-01-10 12:24:16 +01:00
# now run the checks the user asked for
2018-09-17 21:44:22 +02:00
for cve in $supported_cve_list
do
if [ " $opt_cve_all " = 1 ] || echo " $opt_cve_list " | grep -qw " $cve " ; then
check_" $( echo " $cve " | tr - _) "
_info
fi
done
2018-09-19 09:04:52 +02:00
if [ -n " $final_summary " ] ; then
_info " > \033[46m\033[30mSUMMARY:\033[0m $final_summary "
_info ""
fi
2018-01-07 15:00:59 +01:00
2018-11-25 18:37:03 +01:00
if [ " $bad_accuracy " = 1 ] ; then
_warn "We're missing some kernel info (see -v), accuracy might be reduced"
fi
2019-05-24 10:15:02 +02:00
_vars = $( set | grep -Ev '^[A-Z_[:space:]]' | grep -v -F 'mockme=' | sort | tr "\n" '|' )
2018-04-04 23:58:15 +02:00
_debug " variables at end of script: $_vars "
2019-05-24 10:15:02 +02:00
if [ -n " $mockme " ] && [ " $opt_mock " = 1 ] ; then
if command -v "gzip" >/dev/null 2>& 1; then
# not a useless use of cat: gzipping cpuinfo directly doesn't work well
# shellcheck disable=SC2002
if command -v "base64" >/dev/null 2>& 1; then
mock_cpuinfo = " $( cat /proc/cpuinfo | gzip -c | base64 -w0) "
elif command -v "uuencode" >/dev/null 2>& 1; then
mock_cpuinfo = " $( cat /proc/cpuinfo | gzip -c | uuencode -m - | grep -Fv 'begin-base64' | grep -Fxv -- '====' | tr -d "\n" ) "
fi
fi
if [ -n " $mock_cpuinfo " ] ; then
mockme = $( printf "%b\n%b" " $mockme " " SMC_MOCK_CPUINFO=' $mock_cpuinfo ' " )
unset mock_cpuinfo
fi
_info ""
# shellcheck disable=SC2046
_warn "To mock this CPU, set those vars: " $( echo " $mockme " | sort -u)
fi
2018-08-04 16:31:41 +02:00
if [ " $opt_explain " = 0 ] ; then
_info "Need more detailed information about mitigation options? Use --explain"
fi
2018-01-09 18:54:35 +01:00
_info "A false sense of security is worse than no security at all, see --disclaimer"
2018-01-09 18:52:21 +01:00
2019-05-23 14:26:40 +02:00
if [ " $mocked " = 1 ] ; then
_info ""
_warn "One or several values have been mocked. This should only be done when debugging/testing this script."
_warn "The results do NOT reflect the actual status of the system we're running on."
fi
2018-01-29 10:29:48 +01:00
if [ " $opt_batch " = 1 ] && [ " $opt_batch_format " = "nrpe" ] ; then
2018-12-10 19:33:07 +01:00
if [ -n " $nrpe_vuln " ] ; then
2018-01-10 12:18:45 +01:00
echo " Vulnerable: $nrpe_vuln "
else
echo "OK"
fi
fi
2018-01-11 09:04:13 +01:00
2018-09-15 15:45:10 +02:00
if [ " $opt_batch " = 1 ] && [ " $opt_batch_format " = "short" ] ; then
_echo 0 " ${ short_output % } "
fi
2018-01-29 10:29:48 +01:00
if [ " $opt_batch " = 1 ] && [ " $opt_batch_format " = "json" ] ; then
_echo 0 " ${ json_output %? } ] "
2018-01-11 09:04:13 +01:00
fi
2018-01-13 20:33:12 +01:00
2018-02-25 16:51:42 +01:00
if [ " $opt_batch " = 1 ] && [ " $opt_batch_format " = "prometheus" ] ; then
echo "# TYPE specex_vuln_status untyped"
echo "# HELP specex_vuln_status Exposure of system to speculative execution vulnerabilities"
2018-06-21 23:35:51 +02:00
printf "%b\n" " $prometheus_output "
2018-02-25 16:51:42 +01:00
fi
2018-01-13 20:33:12 +01:00
# exit with the proper exit code
[ " $global_critical " = 1 ] && exit 2 # critical
[ " $global_unknown " = 1 ] && exit 3 # unknown
exit 0 # ok
2018-09-23 17:29:14 +02:00
# We're using MCE.db from the excellent platomav's MCExtractor project
2019-11-23 13:39:51 +01:00
# The builtin version follows, but the user can download an up-to-date copy (to be stored in his $HOME) by using --update-fwdb
# To update the builtin version itself (by *modifying* this very file), use --update-builtin-fwdb
2019-01-20 19:52:46 +01:00
2022-03-20 11:04:57 +01:00
# %%% MCEDB v221+i20220208
2018-09-23 17:29:14 +02:00
# I,0x00000611,0x00000B27,19961218
# I,0x00000612,0x000000C6,19961210
# I,0x00000616,0x000000C6,19961210
# I,0x00000617,0x000000C6,19961210
# I,0x00000619,0x000000D2,19980218
# I,0x00000630,0x00000013,19960827
# I,0x00000632,0x00000020,19960903
# I,0x00000633,0x00000036,19980923
# I,0x00000634,0x00000037,19980923
2019-11-23 13:33:55 +01:00
# I,0x00000650,0x00000045,19990525
# I,0x00000651,0x00000042,19990525
2018-09-23 17:29:14 +02:00
# I,0x00000652,0x0000002D,19990518
# I,0x00000653,0x00000010,19990628
# I,0x00000660,0x0000000A,19990505
# I,0x00000665,0x00000003,19990505
2019-11-23 13:33:55 +01:00
# I,0x0000066A,0x0000000D,19990505
2018-09-23 17:29:14 +02:00
# I,0x0000066D,0x00000007,19990505
# I,0x00000670,0x00000007,19980602
2019-11-23 13:33:55 +01:00
# I,0x00000671,0x00000014,19980811
# I,0x00000672,0x00000038,19990922
# I,0x00000673,0x0000002E,19990910
# I,0x00000680,0x00000017,19990610
2018-09-23 17:29:14 +02:00
# I,0x00000681,0x00000014,19991209
2019-11-23 13:33:55 +01:00
# I,0x00000683,0x00000014,20010206
# I,0x00000686,0x00000008,20000505
# I,0x0000068A,0x00000005,20001207
2018-09-23 17:29:14 +02:00
# I,0x00000690,0x00000004,20000206
# I,0x00000691,0x00000001,20020527
# I,0x00000692,0x00000001,20020620
# I,0x00000694,0x00000002,20020926
2019-11-23 13:33:55 +01:00
# I,0x00000695,0x00000047,20041109
2018-09-23 17:29:14 +02:00
# I,0x00000696,0x00000001,20000707
# I,0x000006A0,0x00000003,20000110
# I,0x000006A1,0x00000001,20000306
# I,0x000006A4,0x00000001,20000616
# I,0x000006B0,0x0000001A,20010129
# I,0x000006B1,0x0000001D,20010220
# I,0x000006B4,0x00000002,20020111
# I,0x000006D0,0x00000006,20030522
# I,0x000006D1,0x00000009,20030709
# I,0x000006D2,0x00000010,20030814
# I,0x000006D6,0x00000018,20041017
# I,0x000006D8,0x00000021,20060831
# I,0x000006E0,0x00000008,20050215
# I,0x000006E1,0x0000000C,20050413
# I,0x000006E4,0x00000026,20050816
# I,0x000006E8,0x0000003C,20060208
# I,0x000006EC,0x0000005B,20070208
# I,0x000006F0,0x00000005,20050818
# I,0x000006F1,0x00000012,20051129
# I,0x000006F2,0x0000005D,20101002
# I,0x000006F4,0x00000028,20060417
# I,0x000006F5,0x00000039,20060727
# I,0x000006F6,0x000000D2,20101001
2019-11-23 13:33:55 +01:00
# I,0x000006F7,0x0000006B,20101002
2018-09-23 17:29:14 +02:00
# I,0x000006F9,0x00000084,20061012
# I,0x000006FA,0x00000095,20101002
# I,0x000006FB,0x000000C1,20111004
# I,0x000006FD,0x000000A4,20101002
# I,0x00000F00,0xFFFF0001,20000130
# I,0x00000F01,0xFFFF0007,20000404
# I,0x00000F02,0xFFFF000B,20000518
# I,0x00000F03,0xFFFF0001,20000518
# I,0x00000F04,0xFFFF0010,20000803
2019-11-23 13:33:55 +01:00
# I,0x00000F05,0x0000000C,20000824
2018-09-23 17:29:14 +02:00
# I,0x00000F06,0x00000004,20000911
# I,0x00000F07,0x00000012,20020716
# I,0x00000F08,0x00000008,20001101
# I,0x00000F09,0x00000008,20010104
# I,0x00000F0A,0x00000015,20020821
# I,0x00000F11,0x0000000A,20030729
2019-11-23 13:33:55 +01:00
# I,0x00000F12,0x0000002F,20030502
2018-09-23 17:29:14 +02:00
# I,0x00000F13,0x00000005,20030508
# I,0x00000F20,0x00000001,20010423
2019-11-23 13:33:55 +01:00
# I,0x00000F21,0x00000003,20010529
2018-09-23 17:29:14 +02:00
# I,0x00000F22,0x00000005,20030729
# I,0x00000F23,0x0000000D,20010817
# I,0x00000F24,0x00000021,20030610
# I,0x00000F25,0x0000002C,20040826
# I,0x00000F26,0x00000010,20040805
2019-11-23 13:33:55 +01:00
# I,0x00000F27,0x00000039,20030604
# I,0x00000F29,0x0000002F,20040811
2018-09-23 17:29:14 +02:00
# I,0x00000F30,0x00000013,20030815
# I,0x00000F31,0x0000000B,20031021
# I,0x00000F32,0x0000000A,20040511
# I,0x00000F33,0x0000000C,20050421
# I,0x00000F34,0x00000017,20050421
# I,0x00000F36,0x00000007,20040309
# I,0x00000F37,0x00000003,20031218
# I,0x00000F40,0x00000006,20040318
# I,0x00000F41,0x00000017,20050422
# I,0x00000F42,0x00000003,20050421
# I,0x00000F43,0x00000005,20050421
# I,0x00000F44,0x00000006,20050421
# I,0x00000F46,0x00000004,20050411
# I,0x00000F47,0x00000003,20050421
# I,0x00000F48,0x0000000E,20080115
# I,0x00000F49,0x00000003,20050421
# I,0x00000F4A,0x00000004,20051214
# I,0x00000F60,0x00000005,20050124
# I,0x00000F61,0x00000008,20050610
# I,0x00000F62,0x0000000F,20051215
# I,0x00000F63,0x00000005,20051010
# I,0x00000F64,0x00000004,20051223
# I,0x00000F65,0x0000000B,20070510
# I,0x00000F66,0x0000001B,20060310
# I,0x00000F68,0x00000009,20060714
# I,0x00001632,0x00000002,19980610
# I,0x00010650,0x00000002,20060513
# I,0x00010660,0x00000004,20060612
2019-11-23 13:33:55 +01:00
# I,0x00010661,0x00000045,20101004
2018-09-23 17:29:14 +02:00
# I,0x00010670,0x00000005,20070209
# I,0x00010671,0x00000106,20070329
# I,0x00010674,0x84050100,20070726
# I,0x00010676,0x00000612,20150802
# I,0x00010677,0x0000070D,20150802
# I,0x0001067A,0x00000A0E,20150729
# I,0x000106A0,0xFFFF001A,20071128
# I,0x000106A1,0xFFFF000B,20080220
# I,0x000106A2,0xFFFF0019,20080714
# I,0x000106A4,0x00000013,20150630
# I,0x000106A5,0x0000001D,20180511
# I,0x000106C0,0x00000007,20070824
# I,0x000106C1,0x00000109,20071203
2019-11-23 13:33:55 +01:00
# I,0x000106C2,0x00000219,20090410
2018-09-23 17:29:14 +02:00
# I,0x000106C9,0x00000007,20090213
# I,0x000106CA,0x00000107,20090825
# I,0x000106D0,0x00000005,20071204
# I,0x000106D1,0x0000002A,20150803
# I,0x000106E0,0xFFFF0022,20090116
# I,0x000106E1,0xFFFF000D,20090206
2022-03-17 19:36:44 +01:00
# I,0x000106E2,0xFFFF0011,20090924
2018-09-23 17:29:14 +02:00
# I,0x000106E3,0xFFFF0011,20090512
# I,0x000106E4,0x00000003,20130701
# I,0x000106E5,0x0000000A,20180508
# I,0x000106F0,0xFFFF0009,20090210
# I,0x000106F1,0xFFFF0007,20090210
# I,0x00020650,0xFFFF0008,20090218
# I,0x00020651,0xFFFF0018,20090818
# I,0x00020652,0x00000011,20180508
# I,0x00020654,0xFFFF0007,20091124
# I,0x00020655,0x00000007,20180423
# I,0x00020661,0x00000105,20110718
# I,0x000206A0,0x00000029,20091102
# I,0x000206A1,0x00000007,20091223
# I,0x000206A2,0x00000027,20100502
# I,0x000206A3,0x00000009,20100609
# I,0x000206A4,0x00000022,20100414
# I,0x000206A5,0x00000007,20100722
# I,0x000206A6,0x90030028,20100924
2019-05-14 20:31:27 +02:00
# I,0x000206A7,0x0000002F,20190217
2018-09-23 17:29:14 +02:00
# I,0x000206C0,0xFFFF001C,20091214
# I,0x000206C1,0x00000006,20091222
# I,0x000206C2,0x0000001F,20180508
# I,0x000206D0,0x80000006,20100816
# I,0x000206D1,0x80000106,20101201
2022-03-20 11:04:57 +01:00
# I,0x000206D2,0xAF506958,20110714
# I,0x000206D3,0xAF50696A,20110816
# I,0x000206D5,0xAF5069E5,20120118
2020-05-31 12:55:59 +02:00
# I,0x000206D6,0x00000621,20200304
# I,0x000206D7,0x0000071A,20200324
2018-09-23 17:29:14 +02:00
# I,0x000206E0,0xE3493401,20090108
# I,0x000206E1,0xE3493402,20090224
# I,0x000206E2,0xFFFF0004,20081001
# I,0x000206E3,0xE4486547,20090701
# I,0x000206E4,0xFFFF0008,20090619
# I,0x000206E5,0xFFFF0018,20091215
# I,0x000206E6,0x0000000D,20180515
2022-03-17 19:36:44 +01:00
# I,0x000206F0,0x00000005,20100729
2018-09-23 17:29:14 +02:00
# I,0x000206F1,0x00000008,20101013
# I,0x000206F2,0x0000003B,20180516
# I,0x00030650,0x00000009,20120118
# I,0x00030651,0x00000110,20131014
# I,0x00030660,0x00000003,20101103
# I,0x00030661,0x0000010F,20150721
# I,0x00030669,0x0000010D,20130515
# I,0x00030671,0x00000117,20130410
# I,0x00030672,0x0000022E,20140401
2020-02-01 18:57:59 +01:00
# I,0x00030673,0x83290100,20190916
2019-05-24 22:49:45 +02:00
# I,0x00030678,0x00000838,20190422
2020-05-31 12:55:59 +02:00
# I,0x00030679,0x0000090D,20190710
2018-09-23 17:29:14 +02:00
# I,0x000306A0,0x00000007,20110407
# I,0x000306A2,0x0000000C,20110725
# I,0x000306A4,0x00000007,20110908
# I,0x000306A5,0x00000009,20111110
# I,0x000306A6,0x00000004,20111114
# I,0x000306A8,0x00000010,20120220
2019-05-07 20:29:59 +02:00
# I,0x000306A9,0x00000021,20190213
2018-09-23 17:29:14 +02:00
# I,0x000306C0,0xFFFF0013,20111110
# I,0x000306C1,0xFFFF0014,20120725
# I,0x000306C2,0xFFFF0006,20121017
2020-03-10 22:17:22 +01:00
# I,0x000306C3,0x00000028,20191112
2018-09-23 17:29:14 +02:00
# I,0x000306D1,0xFFFF0009,20131015
# I,0x000306D2,0xFFFF0009,20131219
# I,0x000306D3,0xE3121338,20140825
2020-03-10 22:17:22 +01:00
# I,0x000306D4,0x0000002F,20191112
2022-03-20 11:04:57 +01:00
# I,0x000306E0,0xE920080F,20121113
# I,0x000306E2,0xE9220827,20130523
2018-09-23 17:29:14 +02:00
# I,0x000306E3,0x00000308,20130321
2019-05-07 20:29:59 +02:00
# I,0x000306E4,0x0000042E,20190314
2018-09-23 17:29:14 +02:00
# I,0x000306E6,0x00000600,20130619
2019-05-07 20:29:59 +02:00
# I,0x000306E7,0x00000715,20190314
2018-09-23 17:29:14 +02:00
# I,0x000306F0,0xFFFF0017,20130730
2022-03-20 11:04:57 +01:00
# I,0x000306F1,0xD141D629,20140416
2022-03-17 19:36:44 +01:00
# I,0x000306F2,0x00000049,20210811
2018-09-23 17:29:14 +02:00
# I,0x000306F3,0x0000000D,20160211
2022-03-17 19:36:44 +01:00
# I,0x000306F4,0x0000001A,20210524
2018-09-23 17:29:14 +02:00
# I,0x00040650,0xFFFF000B,20121206
2020-03-10 22:17:22 +01:00
# I,0x00040651,0x00000026,20191112
2018-09-23 17:29:14 +02:00
# I,0x00040660,0xFFFF0011,20121012
2020-03-10 22:17:22 +01:00
# I,0x00040661,0x0000001C,20191112
2018-09-23 17:29:14 +02:00
# I,0x00040670,0xFFFF0006,20140304
2020-03-10 22:17:22 +01:00
# I,0x00040671,0x00000022,20191112
2018-09-23 17:29:14 +02:00
# I,0x000406A0,0x80124001,20130521
# I,0x000406A8,0x0000081F,20140812
# I,0x000406A9,0x0000081F,20140812
# I,0x000406C1,0x0000010B,20140814
# I,0x000406C2,0x00000221,20150218
2019-05-24 22:49:45 +02:00
# I,0x000406C3,0x00000368,20190423
# I,0x000406C4,0x00000411,20190423
2018-09-23 17:29:14 +02:00
# I,0x000406D0,0x0000000E,20130612
2019-11-23 13:33:55 +01:00
# I,0x000406D8,0x0000012D,20190916
2018-09-23 17:29:14 +02:00
# I,0x000406E1,0x00000020,20141111
# I,0x000406E2,0x0000002C,20150521
2022-03-17 19:36:44 +01:00
# I,0x000406E3,0x000000EC,20210428
2018-09-23 17:29:14 +02:00
# I,0x000406E8,0x00000026,20160414
# I,0x000406F0,0x00000014,20150702
2022-03-17 19:36:44 +01:00
# I,0x000406F1,0x0B000040,20210519
2018-09-23 17:29:14 +02:00
# I,0x00050650,0x8000002B,20160208
# I,0x00050651,0x8000002B,20160208
# I,0x00050652,0x80000037,20170502
2022-03-17 19:36:44 +01:00
# I,0x00050653,0x0100015C,20210526
# I,0x00050654,0x02006C0A,20210616
2019-11-12 21:19:03 +01:00
# I,0x00050655,0x03000012,20190412
2022-03-17 19:36:44 +01:00
# I,0x00050656,0x0400320A,20210813
# I,0x00050657,0x0500320A,20210813
# I,0x0005065A,0x86002302,20210416
# I,0x0005065B,0x07002402,20210604
2018-09-23 17:29:14 +02:00
# I,0x00050661,0xF1000008,20150130
2019-11-12 21:19:03 +01:00
# I,0x00050662,0x0000001C,20190617
2022-03-17 19:36:44 +01:00
# I,0x00050663,0x0700001C,20210612
# I,0x00050664,0x0F00001A,20210612
# I,0x00050665,0x0E000014,20210918
2018-09-23 17:29:14 +02:00
# I,0x00050670,0xFFFF0030,20151113
# I,0x00050671,0x000001B6,20180108
# I,0x000506A0,0x00000038,20150112
# I,0x000506C2,0x00000014,20180511
# I,0x000506C8,0x90011010,20160323
2022-03-17 19:36:44 +01:00
# I,0x000506C9,0x00000046,20210510
# I,0x000506CA,0x00000022,20210622
2018-09-23 17:29:14 +02:00
# I,0x000506D1,0x00000102,20150605
# I,0x000506E0,0x00000018,20141119
# I,0x000506E1,0x0000002A,20150602
# I,0x000506E2,0x0000002E,20150815
2022-03-17 19:36:44 +01:00
# I,0x000506E3,0x000000EC,20210429
2018-09-23 17:29:14 +02:00
# I,0x000506E8,0x00000034,20160710
2019-01-20 19:52:46 +01:00
# I,0x000506F0,0x00000010,20160607
2022-03-17 19:36:44 +01:00
# I,0x000506F1,0x00000036,20210510
2018-09-23 17:29:14 +02:00
# I,0x00060660,0x0000000C,20160821
# I,0x00060661,0x0000000E,20170128
# I,0x00060662,0x00000022,20171129
# I,0x00060663,0x0000002A,20180417
2020-05-31 12:55:59 +02:00
# I,0x000606A0,0x80000031,20200308
2021-05-24 12:49:25 +02:00
# I,0x000606A4,0x0B000280,20200817
# I,0x000606A5,0x0C0002F0,20210308
2022-03-17 19:36:44 +01:00
# I,0x000606A6,0x0D000332,20211217
2020-09-14 21:45:09 +02:00
# I,0x000606E0,0x0000000B,20161104
2019-11-12 21:19:03 +01:00
# I,0x000606E1,0x00000108,20190423
2018-09-23 17:29:14 +02:00
# I,0x000706A0,0x00000026,20170712
2022-03-17 19:36:44 +01:00
# I,0x000706A1,0x00000038,20210510
# I,0x000706A8,0x0000001C,20210510
2019-11-12 21:19:03 +01:00
# I,0x000706E0,0x0000002C,20180614
# I,0x000706E1,0x00000042,20190420
# I,0x000706E2,0x00000042,20190420
2020-09-14 21:45:09 +02:00
# I,0x000706E3,0x81000008,20181002
# I,0x000706E4,0x00000046,20190905
2022-03-17 19:36:44 +01:00
# I,0x000706E5,0x000000A8,20210526
2018-09-23 17:29:14 +02:00
# I,0x00080650,0x00000018,20180108
2022-03-17 19:36:44 +01:00
# I,0x00080664,0x0B00000F,20210217
# I,0x00080665,0x0B00000F,20210217
2020-09-14 21:45:09 +02:00
# I,0x000806A0,0x00000010,20190507
2022-03-17 19:36:44 +01:00
# I,0x000806A1,0x0000002D,20210902
2020-10-05 20:01:31 +02:00
# I,0x000806C0,0x00000068,20200402
2022-03-17 19:36:44 +01:00
# I,0x000806C1,0x0000009C,20211026
# I,0x000806C2,0x00000022,20210716
2021-05-24 12:49:25 +02:00
# I,0x000806D0,0x00000050,20201217
2022-03-17 19:36:44 +01:00
# I,0x000806D1,0x0000003C,20210716
# I,0x000806E9,0x000000EC,20210428
# I,0x000806EA,0x000000EC,20210428
# I,0x000806EB,0x000000EC,20210428
# I,0x000806EC,0x000000EC,20210428
# I,0x00090660,0x00000009,20200617
# I,0x00090661,0x00000015,20210921
2021-05-24 12:49:25 +02:00
# I,0x00090670,0x00000019,20201111
2022-03-17 19:36:44 +01:00
# I,0x00090671,0x0000001C,20210614
# I,0x00090672,0x0000001A,20220103
# I,0x00090674,0x00000219,20210425
# I,0x00090675,0x0000001A,20220103
# I,0x000906A0,0x0000001C,20210614
# I,0x000906A1,0x0000011F,20211104
# I,0x000906A2,0x00000315,20220102
2022-03-20 11:04:57 +01:00
# I,0x000906A3,0x00000419,20220220
# I,0x000906A4,0x00000419,20220220
2022-03-17 19:36:44 +01:00
# I,0x000906C0,0x2400001F,20210809
# I,0x000906E9,0x000000EC,20210429
# I,0x000906EA,0x000000EC,20210428
# I,0x000906EB,0x000000EC,20210428
# I,0x000906EC,0x000000EC,20210428
# I,0x000906ED,0x000000EC,20210428
2020-02-01 18:57:59 +01:00
# I,0x000A0650,0x000000BE,20191010
# I,0x000A0651,0x000000C2,20191113
2022-03-17 19:36:44 +01:00
# I,0x000A0652,0x000000EC,20210428
# I,0x000A0653,0x000000EC,20210428
2020-03-10 22:17:22 +01:00
# I,0x000A0654,0x000000C6,20200123
2022-03-17 19:36:44 +01:00
# I,0x000A0655,0x000000EE,20210428
# I,0x000A0660,0x000000EA,20210428
# I,0x000A0661,0x000000EC,20210429
2021-05-24 12:49:25 +02:00
# I,0x000A0670,0x0000002C,20201124
2022-03-17 19:36:44 +01:00
# I,0x000A0671,0x00000050,20210829
2020-09-14 21:45:09 +02:00
# I,0x000A0680,0x80000002,20200121
2022-03-17 19:36:44 +01:00
# I,0x000B0670,0x00000009,20211115
2018-09-23 17:29:14 +02:00
# A,0x00000F00,0x02000008,20070614
# A,0x00000F01,0x0000001C,20021031
# A,0x00000F10,0x00000003,20020325
# A,0x00000F11,0x0000001F,20030220
# A,0x00000F48,0x00000046,20040719
# A,0x00000F4A,0x00000047,20040719
# A,0x00000F50,0x00000024,20021212
# A,0x00000F51,0x00000025,20030115
# A,0x00010F50,0x00000041,20040225
# A,0x00020F10,0x0000004D,20050428
# A,0x00040F01,0xC0012102,20050916
# A,0x00040F0A,0x00000068,20060920
# A,0x00040F13,0x0000007A,20080508
# A,0x00040F14,0x00000062,20060127
# A,0x00040F1B,0x0000006D,20060920
# A,0x00040F33,0x0000007B,20080514
# A,0x00060F80,0x00000083,20060929
# A,0x000C0F1B,0x0000006E,20060921
# A,0x000F0F00,0x00000005,20020627
# A,0x000F0F01,0x00000015,20020627
# A,0x00100F00,0x01000020,20070326
# A,0x00100F20,0x010000CA,20100331
# A,0x00100F22,0x010000C9,20100331
# A,0x00100F40,0x01000085,20080501
# A,0x00100F41,0x010000DB,20111024
# A,0x00100F42,0x01000092,20081021
# A,0x00100F43,0x010000C8,20100311
# A,0x00100F62,0x010000C7,20100311
# A,0x00100F80,0x010000DA,20111024
# A,0x00100F81,0x010000D9,20111012
# A,0x00100FA0,0x010000DC,20111024
# A,0x00120F00,0x03000002,20100324
# A,0x00200F30,0x02000018,20070921
# A,0x00200F31,0x02000057,20080502
# A,0x00200F32,0x02000034,20080307
# A,0x00300F01,0x0300000E,20101004
# A,0x00300F10,0x03000027,20111309
# A,0x00500F00,0x0500000B,20100601
# A,0x00500F01,0x0500001A,20100908
# A,0x00500F10,0x05000029,20130121
# A,0x00500F20,0x05000119,20130118
# A,0x00580F00,0x0500000B,20100601
# A,0x00580F01,0x0500001A,20100908
# A,0x00580F10,0x05000028,20101124
2022-03-17 19:36:44 +01:00
# A,0x00580F20,0x05000103,20110526
2018-09-23 17:29:14 +02:00
# A,0x00600F00,0x06000017,20101029
# A,0x00600F01,0x0600011F,20110227
# A,0x00600F10,0x06000425,20110408
# A,0x00600F11,0x0600050D,20110627
# A,0x00600F12,0x0600063E,20180207
# A,0x00600F20,0x06000852,20180206
# A,0x00610F00,0x0600100E,20111102
# A,0x00610F01,0x0600111F,20180305
# A,0x00630F00,0x0600301C,20130817
# A,0x00630F01,0x06003109,20180227
# A,0x00660F00,0x06006012,20141014
# A,0x00660F01,0x0600611A,20180126
# A,0x00670F00,0x06006705,20180220
# A,0x00680F00,0x06000017,20101029
# A,0x00680F01,0x0600011F,20110227
# A,0x00680F10,0x06000410,20110314
2021-05-24 12:49:25 +02:00
# A,0x00690F00,0x06001009,20110613
2018-09-23 17:29:14 +02:00
# A,0x00700F00,0x0700002A,20121218
# A,0x00700F01,0x07000110,20180209
# A,0x00730F00,0x07030009,20131206
# A,0x00730F01,0x07030106,20180209
# A,0x00800F00,0x0800002A,20161006
# A,0x00800F10,0x0800100C,20170131
2019-05-14 20:31:27 +02:00
# A,0x00800F11,0x08001138,20190204
2022-03-17 19:36:44 +01:00
# A,0x00800F12,0x0800126E,20211111
2019-11-12 21:19:03 +01:00
# A,0x00800F82,0x0800820D,20190416
2018-09-23 17:29:14 +02:00
# A,0x00810F00,0x08100004,20161120
2019-11-12 21:19:03 +01:00
# A,0x00810F10,0x08101016,20190430
2020-05-31 12:55:59 +02:00
# A,0x00810F11,0x08101103,20190417
2018-09-23 17:29:14 +02:00
# A,0x00810F80,0x08108002,20180605
2019-11-12 21:19:03 +01:00
# A,0x00810F81,0x08108109,20190417
2018-09-23 17:29:14 +02:00
# A,0x00820F00,0x08200002,20180214
2019-11-12 21:19:03 +01:00
# A,0x00820F01,0x08200103,20190417
# A,0x00830F00,0x08300027,20190401
2022-03-17 19:36:44 +01:00
# A,0x00830F10,0x08301052,20211111
2020-09-14 21:45:09 +02:00
# A,0x00850F00,0x08500004,20180212
2020-05-31 12:55:59 +02:00
# A,0x00860F00,0x0860000E,20200127
2020-09-14 21:45:09 +02:00
# A,0x00860F01,0x08600106,20200619
2021-05-24 12:49:25 +02:00
# A,0x00860F81,0x08608103,20200702
2019-05-07 20:29:59 +02:00
# A,0x00870F00,0x08700004,20181206
2020-05-31 12:55:59 +02:00
# A,0x00870F10,0x08701021,20200125
2020-09-14 21:45:09 +02:00
# A,0x00A00F00,0x0A000033,20200413
2022-03-17 19:36:44 +01:00
# A,0x00A00F10,0x0A001053,20211217
# A,0x00A00F11,0x0A00115D,20211119
# A,0x00A00F12,0x0A001227,20211215
# A,0x00A00F80,0x0A008003,20211015
# A,0x00A00F82,0x0A008204,20211015
2020-09-14 21:45:09 +02:00
# A,0x00A20F00,0x0A200025,20200121
2022-03-17 19:36:44 +01:00
# A,0x00A20F10,0x0A201016,20210408
# A,0x00A20F12,0x0A201205,20210719
2021-05-24 12:49:25 +02:00
# A,0x00A50F00,0x0A50000C,20201208