peter/spectre-meltdown-checker
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442 Commits

Author SHA1 Message Date
Stéphane Lesimple
ab67a9221d feat: read/write msr now supports msr-tools or perl as dd fallback 2018-08-10 10:26:23 +02:00
0x9fff00
f4592bf3a8 Add Arch armv5/armv7 kernel image location (#227) 2018-08-09 22:13:30 +02:00
Stéphane Lesimple
be15e47671 chore: setting master to v0.38+ 2018-08-09 14:25:22 +02:00
Nathan Parsons
d3481d9524 Add support for the kernel being within a btrfs subvolume (#226) 
- /boot may be within a named root subvolume (eg. "/@/boot")
- /boot may be in its own subvolume (eg. "/@boot")
 2018-08-09 14:00:35 +02:00
Stéphane Lesimple
21af561148 bump to v0.38 2018-08-07 10:55:50 +02:00
Stéphane Lesimple
cb740397f3 feat(arm32): add spectrev1 mitigation detection 2018-08-07 10:42:03 +02:00
Stéphane Lesimple
84195689af change: default to --no-explain, use --explain to get detailed mitigation help 2018-08-04 16:31:41 +02:00
Stéphane Lesimple
b637681fa8 fix: debug output: msg inaccuracy for ARM checks 2018-08-04 16:19:54 +02:00
Stéphane Lesimple
9316c30577 fix: armv8: models < 0xd07 are not vulnerable 2018-08-04 16:19:54 +02:00
Lily Wilson
f9dd9d8cb9 add guess for archlinuxarm aarch64 kernel image on raspberry pi 3 (#222) 2018-08-01 00:15:52 +02:00
Stéphane Lesimple
0f0d103a89 fix: correctly init capabilities_ssb_no var in all cases 2018-07-26 10:18:14 +02:00
Stéphane Lesimple
b262c40541 fix: remove spurious character after an else statement 2018-07-25 21:55:50 +02:00
Stéphane Lesimple
cc2910fbbc fix: read_cpuid: don't use iflag=skip_bytes for compat with old dd versions 
This closes #215 #199 #193
 2018-07-23 09:12:30 +02:00
manish jaggi
30c4a1f6d2 arm64: cavium: Add CPU Implementer Cavium (#216) 
This patch adds 0x43 check for cavium implementor id in function
parse_cpu_details. Also adds that Cavium Soc is not vulnerable to variant 3/3a

Signed-off-by: Manish Jaggi <manish.jagg@cavium.com>
 2018-07-22 19:06:19 +02:00
Stéphane Lesimple
cf06636a3f fix: prometheus output: use printf for proper \n interpretation (#204) 2018-06-21 23:35:51 +02:00
Stéphane Lesimple
60077c8d12 fix(arm): rewrite vuln logic from latest arm statement for Cortex A8 to A76 2018-06-21 23:24:18 +02:00
Rob Gill
c181978d7c fix(arm): Updated arm cortex status (#209) 
* Cortex A8 Vulnerable

Arm Cortex A8 is vulnerable to variants 1 & 2  (https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability)

Part number is 0xc08 (https://developer.arm.com/docs/ddi0344/b/system-control-coprocessor/system-control-coprocessorregisters/c0-main-id-register)

False negative reported by @V10lator in #206

* ARM Cortex A12 Vulnerable to 1&2

https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability

* A76 vulnerable to variant 4

All arch 8 cortex A57-A76 are vulnerable to variant 4.

https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability

* Whitelist variant4 nonvuln Arms

* ARM Cortex Whitelist & Cumulative Blacklist

Applies all information about vulnerabilities of ARM Cortex processors (from https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability).

Whitelist & blacklist approach, using both vulnerable and non vulnerable status for each identified CPU, with vulnerabilities tracked cumulatively for multi CPU systems.
 2018-06-16 12:14:39 +02:00
Rob Gill
5962d20ba7 fix(variant4): whitelist from common.c::cpu_no_spec_store_bypass (#202) 
* variant4 from common.c::cpu_no_spec_store_bypass

Variant 4 - Add function to 'whitelist' the hand-full of CPUs unaffected by speculative store bypass. 

This would allow improved determination of variant 4 status ( #189 ) of immune CPUs while waiting for the 4.17/stable patches to be backported to distro kernels.

Source of cpu list : https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/x86/kernel/cpu/common.c#n945)
Modeled after is_cpu_specex_free()

* amd families fix

amd families are reported by parse_cpu_details() in decimal

* remove duplicates

Only list processors which speculate and are immune to variant 4.
Avoids duplication with non-speculating CPUs listed in is_cpu_specex_free()
 2018-05-27 15:14:29 +02:00
Rob Gill
17a3488505 fix(help): add missing references to variants 3a & 4 (#201) 2018-05-24 16:35:57 +02:00
Stéphane Lesimple
e54e8b3e84 chore: remove warning in README, fix display indentation 2018-05-24 16:32:53 +02:00
Stéphane Lesimple
39c778e3ac fix(amd): AMD families 0x15-0x17 non-arch MSRs are a valid way to control SSB 2018-05-23 23:08:07 +02:00
Stéphane Lesimple
2cde6e4649 feat(ssbd): add detection of proper CPUID bits on AMD 2018-05-23 22:50:52 +02:00
Stéphane Lesimple
f4d51e7e53 fix(variant4): add another detection way for Red Hat kernel 2018-05-23 22:47:54 +02:00
Stéphane Lesimple
85d46b2799 feat(variant4): add more detailed explanations 2018-05-23 21:08:58 +02:00
Stéphane Lesimple
61e02abd0c feat(variant3a): detect up to date microcode 2018-05-23 21:08:08 +02:00
Stéphane Lesimple
114756fab7 fix(amd): not vulnerable to variant3a 2018-05-23 20:38:43 +02:00
Rob Gill
ea75969eb7 fix(help): Update variant options in usage message (#200) 2018-05-22 15:54:25 +02:00
Stéphane Lesimple
ca391cbfc9 fix(variant2): correctly detect IBRS/IBPB in SLES kernels 2018-05-22 12:06:46 +02:00
Stéphane Lesimple
68af5c5f92 feat(variant4): detect SSBD-aware kernel 2018-05-22 12:05:46 +02:00
Stéphane Lesimple
f75cc0bb6f feat(variant4): add sysfs mitigation hint and some explanation about the vuln 2018-05-22 09:39:11 +02:00
Stéphane Lesimple
f33d65ff71 feat(variant3a): add information about microcode-sufficient mitigation 2018-05-22 09:38:29 +02:00
Stéphane Lesimple
725eaa8bf5 feat(arm): adjust vulnerable ARM CPUs for variant3a and variant4 2018-05-22 09:19:29 +02:00
Stéphane Lesimple
c6ee0358d1 feat(variant4): report SSB_NO CPUs as not vulnerable 2018-05-22 09:18:30 +02:00
Stéphane Lesimple
22d0b203da fix(ssb_no): rename ssbd_no to ssb_no and fix shift 2018-05-22 00:38:31 +02:00
Stéphane Lesimple
3062a8416a fix(msg): add missing words 2018-05-22 00:10:08 +02:00
Stéphane Lesimple
6a4318addf feat(variant3a/4): initial support for 2 new CVEs 2018-05-22 00:06:56 +02:00
Stéphane Lesimple
c19986188f fix(variant2): adjust detection for SLES kernels 2018-05-19 09:53:12 +02:00
Rob Gill
7e4899bcb8 ibrs can't be enabled on no ibrs cpu (#195) 
* ibrs can't be enabled on no ibrs cpu

If the cpu is identified, and does not support SPEC_CTRL or IBRS, then ibrs can't be enabled, even if supported by the kernel.
Instead of reporting IBRS enabled and active UNKNOWN, report IBRS enabled and active NO.
 2018-05-17 15:39:48 +02:00
rrobgill
5cc77741af Update spectre-meltdown-checker.sh 2018-05-05 13:00:44 +02:00
rrobgill
1c0f6d9580 cpuid and msr module check 
This adds a check before loading the cpuid and msr modules under linux, ensuring they are not unloaded in exit_cleanup() if they were initially present.
 2018-05-05 13:00:44 +02:00
Onno Zweers
4acd0f647a Suggestion to change VM to a CPU with IBRS capability 2018-04-20 20:35:12 +02:00
Stéphane Lesimple
fb52dbe7bf set master branch to v0.37+ 2018-04-20 20:34:42 +02:00
Stéphane Lesimple
edebe4dcd4 bump to v0.37 2018-04-18 23:51:45 +02:00
Stéphane Lesimple
83ea78f523 fix: arm: also detect variant 1 mitigation when using native objdump 2018-04-17 18:50:32 +02:00
Stéphane Lesimple
602b68d493 fix(spectrev2): explain that retpoline is possible for Skylake+ if there is RSB filling, even if IBRS is still better 2018-04-16 09:27:28 +02:00
Stéphane Lesimple
97bccaa0d7 feat: rephrase IBPB warning when only retpoline is enabled in non-paranoid mode 2018-04-16 09:13:25 +02:00
Stéphane Lesimple
68e619b0d3 feat: show RSB filling capability for non-Skylake in verbose mode 2018-04-16 09:08:25 +02:00
Stéphane Lesimple
a6f4475cee feat: make IBRS_FW blue instead of green 2018-04-16 09:07:54 +02:00
Stéphane Lesimple
223f5028df feat: add --paranoid to choose whether we require IBPB 2018-04-15 23:05:30 +02:00
Stéphane Lesimple
c0108b9690 fix(spectre2): don't explain how to fix when NOT VULNERABLE 2018-04-15 20:55:55 +02:00
Stéphane Lesimple
a3016134bd feat: make RSB filling support mandatory for Skylake+ CPUs 2018-04-15 20:55:31 +02:00
Stéphane Lesimple
59d85b39c9 feat: detect RSB filling capability in the kernel 2018-04-15 20:55:01 +02:00
Stéphane Lesimple
baaefb0c31 fix: remove shellcheck warnings 2018-04-11 22:24:03 +02:00
Igor Lubashev
d452aca03a fix: invalid bash syntax when ibpb_enabled or ibrs_enabled are empty 2018-04-11 10:29:42 +02:00
Stéphane Lesimple
10b8d94724 feat: detect latest Red Hat kernels' RO ibpb_enabled knob 2018-04-10 22:51:45 +02:00
Stéphane Lesimple
8606e60ef7 refactor: no longer display the retoline-aware compiler test when we can't tell for sure 2018-04-10 22:51:45 +02:00
Stéphane Lesimple
6a48251647 fix: regression in 51aeae25, when retpoline & ibpb are enabled 2018-04-10 22:51:45 +02:00
Stéphane Lesimple
f4bf5e95ec fix: typos 2018-04-10 22:51:45 +02:00
Stéphane Lesimple
60eac1ad43 feat: also do PTI performance check with (inv)pcid for BSD 2018-04-10 22:51:45 +02:00
Stéphane Lesimple
b3cc06a6ad fix regression introduced by 82c25dc 2018-04-10 22:51:45 +02:00
Stéphane Lesimple
5553576e31 feat(amd/zen): re-introduce IBRS for AMD except ZEN family 2018-04-10 22:51:45 +02:00
Stéphane Lesimple
e16ad802da feat(ibpb=2): add detection of SMT before concluding the system is not vulnerable 2018-04-10 22:51:45 +02:00
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
Stéphane Lesimple
263ef65fec bump to v0.32 2018-01-20 12:49:12 +01:00
Stéphane Lesimple
a1bd233c49 revert to a simpler check_vmlinux() 2018-01-20 12:26:26 +01:00
Stéphane Lesimple
de6590cd09 cache is_cpu_vulnerable result for performance 2018-01-20 12:24:23 +01:00
Stéphane Lesimple
56d4f82484 is_cpu_vulnerable: implement check for multi-arm systems 2018-01-20 12:24:23 +01:00
Stéphane Lesimple
7fa2d6347b check_vmlinux: when readelf doesn't work, try harder with another way 2018-01-20 12:23:55 +01:00
Stéphane Lesimple
3be5e90481 be smarter to find a usable echo command 2018-01-20 12:23:55 +01:00
Stéphane Lesimple
995620a682 add pine64 vmlinuz location 2018-01-20 12:23:19 +01:00
Stéphane Lesimple
193e0d8d08 arm: cosmetic fix for name and handle aarch64 2018-01-20 12:22:48 +01:00
Stéphane Lesimple
72ef94ab3d ARM: display a friendly name instead of empty string 2018-01-20 12:22:48 +01:00
Harald Hoyer
ccc0453df7 search in /lib/modules/$(uname -r) for vmlinuz, config, System.map 
On Fedora machines /lib/modules/$(uname -r) has all the files.
 2018-01-20 11:19:34 +01:00
Stéphane Lesimple
14ca49a042 Atom N270: implement another variation 2018-01-19 18:47:38 +01:00
Stéphane Lesimple
db357b8e25 CoreOS: remove ephemeral install of a non-used package 2018-01-18 10:17:25 +01:00
Stéphane Lesimple
42a57dd980 add kern.log as another backend of dmesg output 2018-01-17 17:17:39 +01:00
Stéphane Lesimple
5ab95f3656 fix(atom): don't use a pcre regex, only an extended one 2018-01-17 12:01:13 +01:00
Stéphane Lesimple
5b6e39916d fix(atom): properly detect Nxxx Atom series 2018-01-17 11:07:47 +01:00
Willy Sudiarto Raharjo
556951d5f0 Add Support for Slackware. 
Signed-off-by: Willy Sudiarto Raharjo <willysr@gmail.com>
 2018-01-16 11:55:03 +01:00
Stéphane Lesimple
7a88aec95f
Implement CoreOS compatibility mode (#84) 
* Add special CoreOS compatibility mode
* CoreOS: refuse --coreos if we're not under CoreOS
* CoreOS: warn if launched without --coreos option
* is_coreos: make stderr silent
* CoreOS: tiny adjustments
 2018-01-16 10:33:01 +01:00
Stéphane Lesimple
bd18323d79 bump to v0.31 to reflect changes 2018-01-14 22:34:09 +01:00
Stéphane Lesimple
b89d67dd15 meltdown: detecting Xen PV, reporting as not vulnerable 2018-01-14 22:31:21 +01:00
Stéphane Lesimple
704e54019a is_cpu_vulnerable: add check for old Atoms 2018-01-14 21:32:56 +01:00
Stéphane Lesimple
d96093171a verbose: add PCID check for performance impact of PTI 2018-01-14 17:18:34 +01:00
Stéphane Lesimple
dcc4488340
Merge pull request #80 from speed47/cpuid_spec_ctrl 
v0.30, cpuid spec ctrl and other enhancements
 2018-01-14 16:48:02 +01:00
Stéphane Lesimple
32e3fe6c07 bump to v0.30 to reflect changes 2018-01-14 16:45:59 +01:00
Stéphane Lesimple
71213c11b3 ibrs: check for spec_ctrl_ibrs in cpuinfo 2018-01-14 16:36:51 +01:00
Andreas Rammhold
2964c4ab44
add support for NixOS kernel 
this removes the need to specify the kernel version manually on NixOS
 2018-01-14 16:18:29 +01:00
Stéphane Lesimple
749f432d32 also check for spec_ctrl flag in cpuinfo 2018-01-14 15:47:51 +01:00
Stéphane Lesimple
a422b53d7c also check for cpuinfo flag 2018-01-14 15:47:51 +01:00
Stéphane Lesimple
c483a2cf60 check spec_ctrl support using cpuid 2018-01-14 15:47:51 +01:00
Stéphane Lesimple
dead0054a4 fix: proper detail msg in vuln status 2018-01-14 15:47:22 +01:00
Stéphane Lesimple
e5e4851d72 proper return codes regardless of the batch mode 2018-01-14 14:24:31 +01:00
Stéphane Lesimple
7f92717a2c add info about accuracy when missing kernel files 2018-01-13 13:59:17 +01:00
Stéphane Lesimple
b47d505689 AMD now vuln to variant2 (as per their stmt) 2018-01-13 13:35:31 +01:00
Corey Hickey
4a2d051285 minor is_cpu_vulnerable() changes (#71) 
* correct is_cpu_vulnerable() comment

As far as I can tell, the function and usage are correct for the comment
to be inverted.

Add a clarifying note as to why the value choice makes sense.

* exit on invalid varient

If this happens, it's a bug in the script. None of the calling code
checks for status 255, so don't let a scripting bug cause a false
negative.

* no need to set vulnerable CPUs

According to comment above this code:
'by default, everything is vulnerable, we work in a "whitelist" logic here.'
 2018-01-13 13:16:37 +01:00
Sylvestre Ledru
f3551b9734 Only show the name of the script, not the full path (#72) 2018-01-13 13:14:19 +01:00
Sylvestre Ledru
45b98e125f fix some typos (#73) 2018-01-13 13:13:40 +01:00
Stéphane Lesimple
dce917bfbb add --version, bump to v0.28 2018-01-12 19:10:44 +01:00
Stéphane Lesimple
8f18f53aba add cpu model in output 2018-01-12 19:08:12 +01:00
M. Willis Monroe
8bd093173d Fixed a few spelling errors (#60) 2018-01-12 11:46:36 +01:00