Git-Mirrors/security-misc
1
0
Fork 0
mirror of https://github.com/Kicksecure/security-misc.git synced 2025-07-25 06:15:22 -04:00
Code Issues Projects Releases Packages Wiki Activity

Include KSPP compliance notices

Browse source
This commit is contained in:
Raja Grewal 2024-08-17 01:06:21 +10:00
parent e962153f84
commit 248e094b8e
No known key found for this signature in database
GPG key ID: 92CA473C156B64C4
5 changed files with 112 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

6
etc/default/grub.d/40_cpu_mitigations.cfg
View file

@ -13,6 +13,9 @@
## Enable a subset of known mitigations for CPU vulnerabilities and disable SMT.
##
## KSPP=yes
## KSPP sets the kernel parameters.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX mitigations=auto,nosmt"
## Disable SMT as it has been the cause of and amplified numerous CPU exploits.
@ -24,6 +27,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX mitigations=auto,nosmt"
## https://forums.whonix.org/t/should-all-kernel-patches-for-cpu-bugs-be-unconditionally-enabled-vs-performance-vs-applicability/7647/17
## https://github.com/anthraxx/linux-hardened/issues/37#issuecomment-619597365
##
## KSPP=yes
## KSPP sets the kernel parameter.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX nosmt=force"
## Enable mitigations for both Spectre Variant 2 (indirect branch speculation)

48
etc/default/grub.d/40_kernel_hardening.cfg
View file

@ -27,6 +27,9 @@ kver="$(dpkg-query --show --showformat='${Version}' "$kpkg")" 2>/dev/null || tru
## https://www.openwall.com/lists/kernel-hardening/2017/06/19/33
## https://www.openwall.com/lists/kernel-hardening/2017/06/20/10
##
## KSPP=yes
## KSPP sets the kernel parameter and does not set CONFIG_SLAB_MERGE_DEFAULT.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX slab_nomerge"
## Enable sanity checks and red zoning of slabs via debugging options to detect corruption.
@ -39,6 +42,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX slab_nomerge"
## https://gitlab.tails.boum.org/tails/tails/-/issues/19613
## https://github.com/Kicksecure/security-misc/issues/253
##
## KSPP=yes
## KSPP sets the kernel parameters and CONFIG_SLUB_DEBUG.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX slab_debug=FZ"
## Zero memory at allocation time and free time.
@ -47,6 +53,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX slab_debug=FZ"
##
## https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6471384af2a6530696fc0203bafe4de41a23c9ef
##
## KSPP=yes
## KSPP sets the kernel parameters, CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y, and CONFIG_INIT_ON_FREE_DEFAULT_ON=y.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX init_on_alloc=1"
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX init_on_free=1"
@ -58,6 +67,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX init_on_free=1"
## https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e900a918b0984ec8f2eb150b8477a47b75d17692
## https://en.wikipedia.org/wiki/Return-oriented_programming#Attacks
##
## KSPP=yes
## KSPP sets the kernel parameter and CONFIG_SHUFFLE_PAGE_ALLOCATOR=y.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX page_alloc.shuffle=1"
## Enable kernel page table isolation to harden against kernel ASLR (KASLR) bypasses.
@ -65,6 +77,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX page_alloc.shuffle=1"
##
## https://en.wikipedia.org/wiki/Kernel_page-table_isolation
##
## KSPP=yes
## KSPP sets the kernel parameter and CONFIG_MITIGATION_PAGE_TABLE_ISOLATION=y.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX pti=on"
## Enable randomization of the kernel stack offset on syscall entries.
@ -74,6 +89,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX pti=on"
## https://lkml.org/lkml/2019/3/18/246
## https://a13xp0p0v.github.io/2020/02/15/CVE-2019-18683.html
##
## KSPP=yes
## KSPP sets the kernel parameter and CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT=y.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX randomize_kstack_offset=on"
## Disable vsyscalls to reduce attack surface as they have been replaced by vDSO.
@ -82,6 +100,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX randomize_kstack_offset=on"
## https://lwn.net/Articles/446528/
## https://en.wikipedia.org/wiki/VDSO
##
## KSPP=yes
## KSPP sets the kernel parameter, CONFIG_LEGACY_VSYSCALL_NONE=y and does not set CONFIG_X86_VSYSCALL_EMULATION.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX vsyscall=none"
## Restrict access to debugfs by not registering the file system.
@ -98,6 +119,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX debugfs=off"
##
## https://forums.whonix.org/t/set-oops-panic-kernel-parameter-or-kernel-panic-on-oops-1-sysctl-for-better-security/7713
##
## KSPP=yes
## KSPP sets CONFIG_PANIC_ON_OOPS=y and CONFIG_PANIC_TIMEOUT=-1.
##
## See /usr/libexec/security-misc/panic-on-oops for implementation.
##
#GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX oops=panic"
@ -135,6 +159,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX debugfs=off"
## https://blogs.oracle.com/linux/post/linux-slub-allocator-internals-and-debugging-4
## https://lwn.net/Articles/835542/
##
## KSPP=yes
## KSPP sets the kernel parameter, CONFIG_KFENCE=y, and CONFIG_KFENCE_SAMPLE_INTERVAL=100.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX kfence.sample_interval=100"
## Disable 32-bit Virtual Dynamic Shared Object (vDSO) mappings.
@ -143,6 +170,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX kfence.sample_interval=100"
## https://lore.kernel.org/lkml/20080409082927.BD59E26F992@magilla.localdomain/T/
## https://lists.openwall.net/linux-kernel/2014/03/11/3
##
## KSPP=yes
## KSPP sets the kernel parameter and does not set CONFIG_COMPAT_VDSO.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX vdso32=0"
## Switch (back) to using kCFI as the default Control Flow Integrity (CFI) implementation.
@ -165,6 +195,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX vdso32=0"
## https://lpc.events/event/16/contributions/1315/attachments/1067/2169/cfi.pdf
## https://forums.whonix.org/t/kernel-hardening-security-misc/7296/561
##
## KSPP=yes
## KSPP sets the kernel parameter.
##
## TODO: Debian 13 Trixie
## Applicable when using Linux kernel >= 6.2 (retained here for future-proofing and completeness).
##
@ -175,6 +208,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX vdso32=0"
##
## https://lore.kernel.org/all/20230623111409.3047467-7-nik.borisov@suse.com/
##
## KSPP=yes
## KSPP does not set CONFIG_COMPAT, CONFIG_IA32_EMULATION, CONFIG_X86_X32, CONFIG_X86_X32_ABI, and CONFIG_MODIFY_LDT_SYSCALL.
##
## TODO: Debian 13 Trixie
## Applicable when using Linux kernel >= 6.7 (retained here for future-proofing and completeness).
##
@ -186,6 +222,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX vdso32=0"
## Enable CPU manufacturer-specific IOMMU drivers to mitigate some DMA attacks.
##
## KSPP=yes
## KSPP sets CONFIG_INTEL_IOMMU=y, CONFIG_INTEL_IOMMU_DEFAULT_ON=y, CONFIG_INTEL_IOMMU_SVM=y, CONFIG_AMD_IOMMU=y, and CONFIG_AMD_IOMMU_V2=y.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX amd_iommu=force_isolation"
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX intel_iommu=on"
@ -197,6 +236,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX intel_iommu=on"
## https://en.wikipedia.org/wiki/DMA_attack
## https://lenovopress.lenovo.com/lp1467.pdf
##
## KSPP=yes
## KSPP sets the kernel parameters, CONFIG_IOMMU_SUPPORT=y, CONFIG_IOMMU_DEFAULT_DMA_STRICT=y, and does not set CONFIG_IOMMU_DEFAULT_PASSTHROUGH.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX iommu=force"
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX iommu.passthrough=0"
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX iommu.strict=1"
@ -210,6 +252,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX iommu.strict=1"
## https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4444f8541dad16fefd9b8807ad1451e806ef1d94
## https://mjg59.dreamwidth.org/54433.html
##
## KSPP=yes
## KSPP sets CONFIG_EFI_DISABLE_PCI_DMA=y.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX efi=disable_early_pci_dma"
## 3. Entropy:
@ -234,6 +279,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX efi=disable_early_pci_dma"
## https://github.com/NixOS/nixpkgs/pull/165355
## https://lkml.org/lkml/2022/6/5/271
##
## KSPP=yes
## KSPP sets CONFIG_RANDOM_TRUST_BOOTLOADER=y and CONFIG_RANDOM_TRUST_CPU=y.
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX random.trust_bootloader=off"
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX random.trust_cpu=off"

8
etc/default/grub.d/40_signed_modules.cfg
View file

@ -9,6 +9,9 @@
## https://forums.whonix.org/t/enforce-kernel-module-software-signature-verification-module-signing-disallow-kernel-module-loading-by-default/7880/61
## https://github.com/dell/dkms/issues/359
##
## KSPP=yes
## KSPP sets CONFIG_MODULE_SIG=y, CONFIG_MODULE_SIG_FORCE=y, and CONFIG_MODULE_SIG_ALL=y.
##
## Not enabled by default yet due to several issues.
##
#GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX module.sig_enforce=1"
@ -18,7 +21,10 @@
##
## https://forums.whonix.org/t/enforce-kernel-module-software-signature-verification-module-signing-disallow-kernel-module-loading-by-default/7880
##
## ## Not enabled by default yet due to several issues.
## KSPP=yes
## KSPP sets CONFIG_SECURITY_LOCKDOWN_LSM=y, CONFIG_SECURITY_LOCKDOWN_LSM_EARLY=y, and CONFIG_LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY=y.
##
## Not enabled by default yet due to several issues.
##
#if dpkg --compare-versions "${kver}" ge "5.4"; then
# GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX lockdown=confidentiality"