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Add link to tabular comparison of CPU mitigations #292

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Jan 10, 2025
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Add link to tabular comparison of CPU mitigations #292

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642b4ee
Add link to tabular comparison of CPU mitigations
raja-grewal Dec 19, 2024
538b312
Add comment about microcode updates
raja-grewal Jan 9, 2025
cf435a8
README.md: Note importance of microcode updates
raja-grewal Jan 10, 2025
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4 changes: 3 additions & 1 deletion README.md
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Expand Up @@ -137,7 +137,9 @@ Networking:

Mitigations for known CPU vulnerabilities are enabled in their strictest form
and simultaneous multithreading (SMT) is disabled. See the
`/etc/default/grub.d/40_cpu_mitigations.cfg` configuration file.
`/etc/default/grub.d/40_cpu_mitigations.cfg` configuration file. Note, to achieve
complete protection for known CPU vulnerabilities, the latest security microcode
(BIOS/UEFI) updates must also be installed on the system.

Boot parameters relating to kernel hardening, DMA mitigations, and entropy
generation are outlined in the `/etc/default/grub.d/40_kernel_hardening.cfg`
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8 changes: 8 additions & 0 deletions etc/default/grub.d/40_cpu_mitigations.cfg
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Expand Up @@ -18,6 +18,14 @@
## https://www.intel.com/content/www/us/en/developer/topic-technology/software-security-guidance/advisory-guidance.html
## https://www.intel.com/content/www/us/en/developer/topic-technology/software-security-guidance/disclosure-documentation.html

## Tabular comparison between the utility and functionality of various mitigations.
## https://forums.whonix.org/t/kernel-hardening-security-misc/7296/587

## For complete protection, users must install the latest relevant security microcode update.
## BIOS/UEFI updates should only be obtained directly from OEMs and/or motherboard manufacturers.
## Note that incorrectly performing system BIOS/UEFI updates can potentially lead to serious functionality issues.
## The parameters below only provide (partial) protection at both the kernel and user space level.

## Enable a subset of known mitigations for some CPU vulnerabilities and disable SMT.
##
## KSPP=yes
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