Comments (6)
Would love to see this, even if it's just a list of links and pointers to other resources :)
from kernel-hardening-checker.
@a13xp0p0v @o8opi Are you looking for something like this? https://www.kernelconfig.io/CONFIG_BUG
The general form is https://www.kernelconfig.io/**CONFIG_NAME**
from kernel-hardening-checker.
https://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project/Recommended_Settings
Especially this page, but actually the whole site, an initiative from Kernel security maintainer Kees Cook:
https://lore.kernel.org/kernel-hardening/CAGXu5jJ3FgxXK9WuOLRwnEq=y4dS+CTm+WQBxWe3sYZ7e9p6Gg@mail.gmail.com/
from kernel-hardening-checker.
@krishjainx, @jbmaillet, yes, I mean creating the documentation describing how the checked parameters influence Linux kernel security.
Another good example is CLIP OS documentation: https://docs.clip-os.org/clipos/kernel.html#configuration
I think of creating doc
directory with markdown files describing Kconfig options, kernel cmdline arguments, and sysctl parameters.
from kernel-hardening-checker.
@a13xp0p0v That sounds like a great idea! That's a lot of checked parameters, however, we should try to automate it so we can do it at scale. What do you think? There's reliable kernel documentation out there we could parse?
from kernel-hardening-checker.
@krishjainx , yes, some part of this work can be automated.
For self_protection
, security_policy
, and harden_userspace
parameters, the Kconfig descriptions and kernel documentation contain some security-relevant info.
Example: https://cateee.net/lkddb/web-lkddb/CFI_CLANG.html
But for cut_attack_surface
parameters, the kernel documentation doesn't say much about the security implications.
from kernel-hardening-checker.
Related Issues (20)
- CONFIG_COMPAT_VDSO has a completely different meaning for arm64 and recommending disabling it doesn't make sense there HOT 3
- CONFIG_ARCH_MMAP_RND_BITS check is wrong for arm64 HOT 3
- drop check for dependency-only CONFIG_GCC_PLUGINS due to Clang HOT 3
- add disabling CONFIG_AIO (legacy POSIX AIO) as a recommendation HOT 1
- add check for CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0x0 too HOT 4
- add check for UNWIND_PATCH_PAC_INTO_SCS, which reduces security compared to using both PAC + SCS HOT 4
- Minimal kernel version ? HOT 1
- New CONFIG_MODULE_SIG_SHA3_512 option in kernel 6.7 HOT 1
- Better json output HOT 4
- Add io_uring_disabled sysctl to disable/limit io_uring creation
- Reducing Kernel Symbols on File System by Disabling CONFIG_VMLINUX_MAP and CONFIG_DEBUG_KERNEL HOT 2
- Kernel Debug Metadata Access with CONFIG_DYNAMIC_DEBUG HOT 3
- Add ia32_emulation kernel cmdline parameter to disable 32-bit emulation support on 64-bit x86 CPUs HOT 1
- Suggestions for kernel-hardening-checker HOT 3
- Add kconfig option for Intel CET shadow stack
- Add check for CONFIG_MITIGATION_RFDS HOT 1
- Linux 6.9 Renames Many CPU Mitigation CONFIGs to CONFIG_MITIGATION_... HOT 1
- The separation between desktop and server. HOT 3
- skip CONFIG_SCHED_STACK_END_CHECK requirement when CONFIG_VMAP_STACK is set HOT 2
- skip CONFIG_DEBUG_NOTIFIERS requirement when CONFIG_CFI_CLANG is set with CONFIG_CFI_PERMISSIVE disabled HOT 4
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