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280 Commits

Author SHA1 Message Date
Stéphane Lesimple
29c294edff feat(bsd): explain how to mitigate variant2 2018-04-10 22:51:45 +02:00
Stéphane Lesimple
59714011db refactor: IBRS_ALL & RDCL_NO are Intel-only 2018-04-10 22:51:45 +02:00
Stéphane Lesimple
51e8261a32 refactor: separate hw checks for Intel & AMD 2018-04-10 22:49:28 +02:00
Stéphane Lesimple
2a4bfad835 refactor: add is_amd and is_intel funcs 2018-04-10 22:49:28 +02:00
Stéphane Lesimple
7e52cea66e feat(spectre2): refined how status of this vuln is decided and more precise explanations on how to fix 2018-04-10 22:49:28 +02:00
Benjamin Bouvier
417d7aab91 Fix trailing whitespace and mixed indent styles; 2018-04-10 22:42:47 +02:00
Sylvestre Ledru
67bf761029 Fix some user facing typos with codespell -w -q3 . 2018-04-08 18:44:13 +02:00
Stéphane Lesimple
0eabd266ad refactor: decrease default verbosity for some tests 2018-04-05 22:20:16 +02:00
Stéphane Lesimple
b77fb0f226 fix: don't override ibrs/ibpb results with later tests 2018-04-05 22:04:20 +02:00
Stéphane Lesimple
89c2e0fb21 fix(amd): show cpuinfo and ucode details 2018-04-05 21:39:27 +02:00
Stéphane Lesimple
b88f32ed95 feat: print raw cpuid, and fetch ucode version under BSD 2018-04-05 00:07:12 +02:00
Stéphane Lesimple
7a4ebe8009 refactor: rewrite read_cpuid to get more common code parts between BSD and Linux 2018-04-05 00:06:24 +02:00
Stéphane Lesimple
0919f5c236 feat: add explanations of what to do when a vulnerability is not mitigated 2018-04-05 00:03:04 +02:00
Stéphane Lesimple
de02dad909 feat: rework Spectre V2 mitigations detection w/ latest vanilla & Red Hat 7 kernels 2018-04-05 00:01:54 +02:00
Stéphane Lesimple
07484d0ea7 add dump of variables at end of script in debug mode 2018-04-04 23:58:15 +02:00
Stéphane Lesimple
a8b557b9e2 fix(cpu): skip CPU checks if asked to (--no-hw) or if inspecting a kernel of another architecture 2018-04-03 19:36:28 +02:00
Stéphane Lesimple
619b2749d8 fix(sysfs): only check for sysfs for spectre2 when in live mode 2018-04-03 19:32:36 +02:00
Stéphane Lesimple
056ed00baa feat(arm): detect spectre variant 1 mitigation 2018-04-03 15:52:25 +02:00
Stéphane Lesimple
aef99d20f3 fix(pti): when PTI activation is unknown, don't say we're vulnerable 2018-04-03 12:45:17 +02:00
Stéphane Lesimple
e2d7ed2243 feat(arm): support for variant2 and meltdown mitigation detection 2018-04-01 17:50:18 +02:00
Stéphane Lesimple
eeaeff8ec3 set version to v0.36+ for master branch between releases 2018-04-01 17:45:01 +02:00
Stéphane Lesimple
f5269a362a feat(bsd): add retpoline detection for BSD 2018-04-01 17:42:29 +02:00
Stéphane Lesimple
f3883a37a0 fix(xen): adjust message for DomUs w/ sysfs 2018-03-31 13:44:04 +02:00
Stéphane Lesimple
b6fd69a022 release: v0.36 2018-03-27 23:08:38 +02:00
Stéphane Lesimple
7adb7661f3 enh: change colors and use red only to report vulnerability 2018-03-25 18:15:08 +02:00
Stéphane Lesimple
aa74315df4 feat: speed up kernel version detection 2018-03-25 13:42:19 +02:00
Stéphane Lesimple
0b8a09ec70 fix: mis adjustments for BSD compat 2018-03-25 13:26:00 +02:00
Stéphane Lesimple
b42d8f2f27 fix(write_msr): use /dev/zero instead of manually echoing zeroes 2018-03-25 12:53:50 +02:00
Stéphane Lesimple
f191ec7884 feat: add --hw-only to only show CPU microcode/cpuid/msr details 2018-03-25 12:48:37 +02:00
Stéphane Lesimple
28da7a0103 misc: message clarifications 2018-03-25 12:48:03 +02:00
Stéphane Lesimple
ece25b98a1 feat: implement support for NetBSD/FreeBSD/DragonFlyBSD 2018-03-25 12:28:02 +02:00
Stéphane Lesimple
889172dbb1 feat: add special extract_vmlinux mode for old RHEL kernels 2018-03-25 11:55:44 +02:00
Stéphane Lesimple
37ce032888 fix: bypass MSR/CPUID checks for non-x86 CPUs 2018-03-25 11:55:44 +02:00
Stéphane Lesimple
701cf882ad feat: more robust validation of extracted kernel image 2018-03-25 11:55:44 +02:00
Stéphane Lesimple
6a94c3f158 feat(extract_vmlinux): look for ELF magic in decompressed blob and cut at found offset 2018-03-25 11:55:42 +02:00
Stéphane Lesimple
2d993812ab feat: add --prefix-arch for cross-arch kernel inspection 2018-03-25 11:55:10 +02:00
Stéphane Lesimple
4961f8327f fix(ucode): fix blacklist detection for some ucode versions 2018-03-19 12:09:39 +01:00
Alex
ecdc448531 Check MSR in each CPU/Thread (#136) 2018-03-17 17:17:15 +01:00
Stéphane Lesimple
12ea49fe0c fix(kvm): properly detect PVHVM mode (fixes #163) 2018-03-16 18:29:58 +01:00
Stéphane Lesimple
053f1613de fix(doc): use https:// URLs in the script comment header 2018-03-16 18:24:59 +01:00
Stéphane Lesimple
bda18d04a0 fix: pine64: re-add vmlinuz location and some error checks 2018-03-10 16:02:44 +01:00
Stéphane Lesimple
d5832dc1dc feat: add ELF magic detection on kernel image blob for some arm64 systems 2018-03-10 14:57:25 +01:00
Stéphane Lesimple
d2f46740e9 feat: enhance kernel image version detection for some old kernels 2018-03-10 14:57:25 +01:00
Sam Morris
2f6a6554a2 Produce output for consumption by prometheus-node-exporter 
A report of all vulnerable machines to be produced with a query such as:

    spexec_vuln_status{status!="OK"}
 2018-02-27 11:08:39 +01:00
Stéphane Lesimple
30842dd9c0 release: bump to v0.35 2018-02-16 10:35:49 +01:00
Stéphane Lesimple
b4ac5fcbe3 feat(variant2): better explanation when kernel supports IBRS but CPU does not 2018-02-16 10:34:01 +01:00
Stéphane Lesimple
55a6fd3911 feat(variant1): better detection for Red Hat/Ubuntu patch 2018-02-15 21:19:49 +01:00
Sylvestre Ledru
35c8a63de6 Remove the color in the title 2018-02-15 20:21:00 +01:00
Stéphane Lesimple
5f914e555e fix(xen): declare Xen's PTI patch as a valid mitigation for variant3 2018-02-14 14:24:55 +01:00
Stéphane Lesimple
66dce2c158 fix(ucode): update blacklisted ucodes list from latest Intel info 2018-02-14 14:14:16 +01:00
Calvin Walton
155cac2102 Teach checker how to find kernels installed by systemd kernel-install 2018-02-10 20:51:33 +01:00
Stéphane Lesimple
22cae605e1 fix(retpoline): remove the "retpoline enabled" test 
This test worked for some early versions of the retpoline
implementation in vanilla kernels, but the corresponding
flag has been removed from /proc/cpuinfo in latest kernels.
The full information is available in /sys instead, which
was already implemented in the script.
 2018-02-09 20:12:33 +01:00
Stéphane Lesimple
eb75e51975 fix(ucode): update list of blacklisted ucodes from 2018-02-08 Intel document 
Removed 2 ucodes and added 2 other ones
 2018-02-09 19:56:27 +01:00
積丹尼 Dan Jacobson
253e180807 Update spectre-meltdown-checker.sh 
Dots better than colon for indicating waiting.
 2018-02-06 19:02:56 +01:00
Stéphane Lesimple
5d6102a00e enh: show kernel version in offline mode 2018-02-02 11:27:04 +01:00
Stéphane Lesimple
a2dfca671e feat: detect disrepancy between found kernel image and running kernel 2018-02-02 11:13:54 +01:00
Stéphane Lesimple
36bd80d75f enh: speedup by not decompressing kernel on --sysfs-only 2018-02-02 11:13:31 +01:00
Stéphane Lesimple
1834dd6201 feat: add skylake era cpu detection routine 2018-02-02 11:12:10 +01:00
Stéphane Lesimple
3d765bc703 enh: lazy loading of cpu informations 2018-02-02 11:11:51 +01:00
Stéphane Lesimple
07afd95b63 feat: better cleanup routine on exit & interrupt 2018-02-02 11:09:36 +01:00
Stéphane Lesimple
b7a10126d1 fix: ARM CPU display name & detection 
Fix ARM CPU display name, and properly
detect known vulnerable ARM CPUs when
multiple different model cores are
present (mostly Android phones)
 2018-02-02 11:00:23 +01:00
Stéphane Lesimple
6346a0deaa fix: --no-color workaround for android's sed 2018-02-02 10:59:49 +01:00
Stéphane Lesimple
8106f91981 release: bump to v0.34 2018-01-31 16:28:54 +01:00
Stéphane Lesimple
b1fdf88f28 enh: display ucode info even when not blacklisted 2018-01-31 16:21:32 +01:00
Stéphane Lesimple
4d29607630 cleanup: shellcheck pass 2018-01-31 16:15:20 +01:00
Stéphane Lesimple
0267659adc cleanup: remove superseded atom detection code 
This is now handled properly by checking the CPU
vendor, family, model instead of looking for the
commercial name of the CPU in /proc/cpuinfo
 2018-01-31 16:15:20 +01:00
Stéphane Lesimple
247b176882 feat: detect known speculative-execution free CPUs 
Based on a kernel patch that has been merged to Linus' tree.
Some of the detections we did by grepping the model name
will probably no longer be needed.
 2018-01-31 16:15:20 +01:00
Stéphane Lesimple
bcae8824ec refacto: create a dedicated func to read cpuid bits 2018-01-31 16:15:20 +01:00
Stéphane Lesimple
71e7109c22 refacto: move cpu discovery bits to a dedicated function 2018-01-31 16:15:20 +01:00
Stéphane Lesimple
aa18b51e1c fix(variant1): smarter lfence check 
Instead of just counting the number of LFENCE
instructions, now we're only counting the those
that directly follow a jump instruction.
 2018-01-31 14:34:54 +01:00
Stéphane Lesimple
b738ac4bd7 fix: regression introduced by previous commit 
449: ./spectre-meltdown-checker.sh: 3: parameter not set
This happened only on blacklisted microcodes, fixed by
adding set +u before the return
 2018-01-31 12:13:50 +01:00
Stéphane Lesimple
799ce3eb30 update blacklisted ucode list from kernel source 2018-01-31 11:26:23 +01:00
Stéphane Lesimple
f1e18c136f doc(disclaimer): Spectre affects all software 
Add a paragraph in the disclaimer stating that this tool focuses
on the kernel side of things, and that for Spectre, any software
might be vulnerable.
 2018-01-30 14:37:52 +01:00
Stéphane Lesimple
e05ec5c85f feat(variant1): detect vanilla mitigation 
Implement detection of mitigation for Variant 1 that is
being pushed on vanilla kernel.
Current name of the patch:
"spectre variant1 mitigations for tip/x86/pti" (v6)
Also detect some distros that already backported this
patch without modifying the vulnerabilities sysfs hierarchy.
This detection is more reliable than the LFENCE one, trust
it and skip the LFENCE heuristic if a match is found.
 2018-01-30 12:55:34 +01:00
Stéphane Lesimple
6e544d6055 fix(cpu): Pentium Exxxx are vulnerable to Meltdown 2018-01-29 11:18:15 +01:00
Stéphane Lesimple
90a65965ff adjust: show how to enable IBRS/IBPB in -v only 2018-01-29 11:06:15 +01:00
Stéphane Lesimple
9b53635eda refacto: fix shellcheck warnings for better compat 
Now `shellcheck -s sh` no longer shows any warnings.
This should improve compatibility with exotic shells
as long as they're POSIX compliant.
 2018-01-29 10:34:08 +01:00
Joseph Mulloy
7404929661 Fix printing of microcode to use cpuinfo values 
The values used should be the ones that come from cpuinfo instead of
the test values. The following line will print the last tuple tested
instead of the actual values of the CPU.

Line 689: _debug "is_ucode_blacklisted: no ($model/$stepping/$ucode)"
 2018-01-26 18:23:18 +01:00
Stéphane Lesimple
0798bd4c5b fix: report arch_capabilities as NO when no MSR 
When the arch_capabilities MSR is not there, it means
that all the features it might advertise can be considered
as NO instead of UNKNOWN
 2018-01-26 14:55:01 +01:00
Stéphane Lesimple
42094c4f8b release: v0.33 2018-01-26 14:20:29 +01:00
Stéphane Lesimple
03d2dfe008 feat: add blacklisted Intel ucode detection 
Some Intel microcodes are known to cause instabilities
such as random reboots. Intel advises to revert to a
previous version if a newer one that fixes those issues
is not available. Detect such known bad microcodes.
 2018-01-26 14:19:54 +01:00
Stéphane Lesimple
9f00ffa5af fix: fallback to UNKNOWN when we get -EACCES 
For detection of IBRS_ALL and RDCL_NO, fallback to
UNKNOWN when we were unable to read the CPUID or MSR.
 2018-01-26 14:16:34 +01:00
Matthieu Cerda
7f0d80b305 xen: detect if the host is a Xen Dom0 or PV DomU (fixes #83) 2018-01-25 11:04:30 +01:00
Stéphane Lesimple
d1c1f0f0f0 fix(batch): fix regression introduced by acf12a6 
In batch mode, $echo_cmd was not initialized early
enough, and caused this error:
./spectre-meltdown-checker.sh: 899: ./spectre-meltdown-checker.sh: -ne: not found
Fix it by initing echo_cmd unconditionally at the start
 2018-01-24 17:57:19 +01:00
Stéphane Lesimple
acf12a6d2d feat(cpu) add STIBP, RDCL_NO, IBRS_ALL checks 
Move all the CPU checks to their own section,
for clarity. We now check for IBRS, IBPB, STIBP,
RDCL_NO and IBRS_ALL. We also show whether the
system CPU is vulnerable to the three variants,
regardless of the fact that mitigations are in
place or not, which is determined in each vuln-
specific section.
 2018-01-24 14:44:16 +01:00
Stéphane Lesimple
b45e40bec8 feat(stibp): add STIBP cpuid feature check 2018-01-24 12:19:02 +01:00
Stéphane Lesimple
3c1d452c99 fix(cpuid): fix off-by-one SPEC_CTRL bit check 2018-01-24 12:18:56 +01:00
Stéphane Lesimple
53b9eda040 fix: don't make IBPB mandatory when it's not there 
On some kernels there could be IBRS support but not
IBPB support, in that case, don't report VULN just
because IBPB is not enabled when IBRS is
 2018-01-24 09:04:25 +01:00
Stéphane Lesimple
3b0ec998b1 fix(cosmetic): tiny msg fixes 2018-01-24 09:04:25 +01:00
Stéphane Lesimple
d55bafde19 fix(cpu): trust is_cpu_vulnerable even w/ debugfs 
For variant3 under AMD, the debugfs vulnerabilities hierarchy
flags the system as Vulnerable, which is wrong. Trust our own
is_cpu_vulnerable() func in that case
 2018-01-24 09:04:25 +01:00
Stéphane Lesimple
147462c0ab fix(variant3): do our checks even if sysfs is here 2018-01-24 09:04:25 +01:00
Stéphane Lesimple
ddc7197b86 fix(retpoline): retpoline-compiler detection 
When kernel is not compiled with retpoline option, doesn't
have the sysfs vulnerability hierarchy and our heuristic to
detect a retpoline-aware compiler didn't match, change result
for retpoline-aware compiler detection from UNKNOWN to NO.
When CONFIG_RETPOLINE is not set, a retpoline-aware compiler
won't produce different asm than a standard one anyway.
 2018-01-24 09:04:25 +01:00
Stéphane Lesimple
e7aa3b9d16 feat(retpoline): check if retpoline is enabled 
Before we would just check if retpoline was compiled
in, now we also check that it's enabled at runtime
(only in live mode)
 2018-01-24 09:04:25 +01:00
Stéphane Lesimple
ff5c92fa6f feat(sysfs): print details even with sysfs 
Before, when the /sys kernel vulnerability interface
was available, we would bypass all our tests and just
print the output of the vulnerability interface. Now,
we still rely on it when available, but we run our
checks anyway, except for variant 1 where the current
method of mitigation detection doesn't add much value
to the bare /sys check
 2018-01-24 09:04:25 +01:00
Stéphane Lesimple
443d9a2ae9 feat(ibpb): now also check for IBPB on variant 2 
In addition to IBRS (and microcode support), IBPB
must be used to mitigate variant 2, if retpoline
support is not available. The vulnerability status
of a system will be defined as "non vulnerable"
if IBRS and IBPB are both enabled, or if IBPB
is enabled with a value of 2 for RedHat kernels,
see https://access.redhat.com/articles/3311301
 2018-01-24 09:04:25 +01:00
Stéphane Lesimple
3e454f1817 fix(offline): report unknown when too few info 
In offline mode, in the worst case where an invalid
config file is given, and we have no vmlinux image
nor System.map, the script was reporting Variant 2
and Variant 3 as vulnerable in the global status.
Replace this by a proper pair of UNKNOWNs
 2018-01-23 22:20:34 +01:00
Stéphane Lesimple
c8a25c5d97 feat: detect invalid kconfig files 2018-01-23 21:48:19 +01:00
Stéphane Lesimple
40381349ab fix(dmesg): detect when dmesg is truncated 
To avoid false negatives when looking for a message
in dmesg, we were previously also grepping in known
on-disk archives of dmesg (dmesg.log, kern.log).
This in turn caused false positives because we have no
guarantee that we're grepping the dmesg of the current
running kernel. Hence we now only look in the live
`dmesg`, detect if it has been truncated, and report
it to the user.
 2018-01-21 16:26:08 +01:00
Stéphane Lesimple
0aa5857a76 fix(cpu): Pentium Exxxx series are not vulnerable 
Pentium E series are not in the vulnerable list from
Intel, and Spectre2 PoC reportedly doesn't work on
an E5200
 2018-01-21 16:13:17 +01:00
Stéphane Lesimple
b3b7f634e6 fix(display): use text-mode compatible colors 
in text-mode 80-cols TERM=linux terminals, colors
were not displaying properly, one had to use
--no-color to be able to read some parts of the
text.
 2018-01-21 12:32:22 +01:00