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Add Google's kernelctf attack surface reduction #137

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Add Google's kernelctf attack surface reduction #137

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2 changes: 2 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@ The security hardening recommendations are based on:
- Last public [grsecurity][3] patch (options which they disable)
- [SECURITY_LOCKDOWN_LSM][5] patchset
- [Direct feedback from the Linux kernel maintainers][23]
- Googles [kernelctf][25]

I also created the [__Linux Kernel Defence Map__][4], which is a graphical representation of the
relationships between security hardening features and the corresponding vulnerability classes
Expand Down Expand Up @@ -506,3 +507,4 @@ try to install `gcc-7-plugin-dev` package, it should help.
[22]: https://github.com/a13xp0p0v/kernel-hardening-checker/issues/56
[23]: https://github.com/a13xp0p0v/kernel-hardening-checker/issues?q=label%3Akernel_maintainer_feedback
[24]: https://github.com/a13xp0p0v/kernel-hardening-checker#motivation
[25]: https://google.github.io/security-research/kernelctf/rules.html
5 changes: 4 additions & 1 deletion kernel_hardening_checker/checks.py
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Expand Up @@ -367,7 +367,6 @@ def add_kconfig_checks(l: List[ChecklistObjType], arch: str) -> None:
l += [KconfigCheck('cut_attack_surface', 'grsec', 'DVB_C8SECTPFE', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'grsec', 'MTD_SLRAM', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'grsec', 'MTD_PHRAM', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'grsec', 'IO_URING', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'grsec', 'KCMP', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'grsec', 'RSEQ', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'grsec', 'LATENCYTOP', 'is not set')]
Expand All @@ -386,6 +385,10 @@ def add_kconfig_checks(l: List[ChecklistObjType], arch: str) -> None:
l += [KconfigCheck('cut_attack_surface', 'maintainer', 'NOUVEAU_LEGACY_CTX_SUPPORT', 'is not set')]
# recommended by Dave Airlie in kernel commit b30a43ac7132cdda

# 'cut_attack_surface', 'kernelctf'
l += [KconfigCheck('cut_attack_surface', 'kernelctf', 'IO_URING', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'kernelctf', 'NF_TABLES', 'is not set')]

# 'cut_attack_surface', 'clipos'
l += [KconfigCheck('cut_attack_surface', 'clipos', 'STAGING', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'clipos', 'KSM', 'is not set')] # to prevent FLUSH+RELOAD attack
Expand Down