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authorSimon Vasseur <simon.vasseur@corp.ovh.com>2018-01-10 14:55:58 +0100
committerSimon Vasseur <simon.vasseur@corp.ovh.com>2018-01-10 14:55:58 +0100
commitb8d28e7f61d6c1ae62a86e0f051a57c0c8dbbdf8 (patch)
treee3ff1ffa525bae4c8bb532162949cf7f3107b0ec
parentd6e4aa43f037e0f412bcc01cbbc89d16cf765bbb (diff)
downloadspectre-meltdown-checker-b8d28e7f61d6c1ae62a86e0f051a57c0c8dbbdf8.tar.lz
spectre-meltdown-checker-b8d28e7f61d6c1ae62a86e0f051a57c0c8dbbdf8.tar.xz
spectre-meltdown-checker-b8d28e7f61d6c1ae62a86e0f051a57c0c8dbbdf8.zip
added some style
-rw-r--r--README.md70
1 files changed, 4 insertions, 66 deletions
diff --git a/README.md b/README.md
index 2089d4f..b77b6f4 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,10 @@ You can also specify a kernel image on the command line, if you'd like to inspec
The script will do its best to detect mitigations, including backported non-vanilla patches, regardless of the advertised kernel version number.
+## Example of script output
+
+![checker](https://framapic.org/FjroIZximyoM/EO5msoSMKb6L.png)
+
## Quick summary of the CVEs
**CVE-2017-5753** bounds check bypass (Spectre Variant 1)
@@ -28,69 +32,3 @@ The script will do its best to detect mitigations, including backported non-vani
- Impact: Kernel
- Mitigation: updated kernel (with PTI/KPTI patches), updating the kernel is enough
- Performance impact of the mitigation: low to medium
-
-## Example of script output
-
-### Ubuntu LTS (before official patches)
-
-```
-$ sudo ./spectre-and-meltdown.sh
-Spectre and Meltdown mitigation detection tool v0.16
-
-Checking for vulnerabilities against live running kernel Linux 4.4.0-104-generic #127-Ubuntu SMP Mon Dec 11 12:16:42 UTC 2017 x86_64
-Will use vmlinux image /boot/vmlinuz-4.4.0-104-generic
-Will use kconfig /boot/config-4.4.0-104-generic
-Will use System.map file /boot/System.map-4.4.0-104-generic
-
-CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
-* Kernel compiled with LFENCE opcode inserted at the proper places: NO (only 38 opcodes found, should be >= 70)
-> STATUS: VULNERABLE
-
-CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
-* Mitigation 1
-* Hardware (CPU microcode) support for mitigation: NO
-* Kernel support for IBRS: NO
-* IBRS enabled for Kernel space: NO
-* IBRS enabled for User space: NO
-* Mitigation 2
-* Kernel compiled with retpoline option: NO
-* Kernel compiled with a retpoline-aware compiler: NO
-> STATUS: VULNERABLE (IBRS hardware + kernel support OR kernel with retpoline are needed to mitigate the vulnerability)
-
-CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
-* Kernel supports Page Table Isolation (PTI): NO
-* PTI enabled and active: NO
-> STATUS: VULNERABLE (PTI is needed to mitigate the vulnerability)
-```
-
-### First patched kernel of RHEL6
-
-```
-$ sudo ./spectre-meltdown-checker.sh --kernel /tmp/vmlinuz-2.6.32-696.18.7.el6.x86_64 --config /tmp/config-2.6.32-696.18.7.el6.x86_64 --map /tmp/System.map-2.6.32-696.18.7.el6.x86_64
-Spectre and Meltdown mitigation detection tool v0.16
-
-Checking for vulnerabilities against specified kernel
-Will use vmlinux image /tmp/vmlinuz-2.6.32-696.18.7.el6.x86_64
-Will use kconfig /tmp/config-2.6.32-696.18.7.el6.x86_64
-Will use System.map file /tmp/System.map-2.6.32-696.18.7.el6.x86_64
-
-CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
-* Kernel compiled with LFENCE opcode inserted at the proper places: YES (84 opcodes found, which is >= 70)
-> STATUS: NOT VULNERABLE
-
-CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
-* Mitigation 1
-* Hardware (CPU microcode) support for mitigation: NO
-* Kernel support for IBRS: YES
-* IBRS enabled for Kernel space: N/A (not testable in offline mode)
-* IBRS enabled for User space: N/A (not testable in offline mode)
-* Mitigation 2
-* Kernel compiled with retpoline option: NO
-* Kernel compiled with a retpoline-aware compiler: NO
-> STATUS: NOT VULNERABLE (offline mode: IBRS will mitigate the vulnerability if enabled at runtime)
-
-CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
-* Kernel supports Page Table Isolation (PTI): YES
-* PTI enabled and active: N/A (can't verify if PTI is enabled in offline mode)
-> STATUS: NOT VULNERABLE (offline mode: PTI will mitigate the vulnerability if enabled at runtime)
-```