X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=kernel_hardening_checker%2Fchecks.py;h=fda5d46986f4f229c3e839f49f2107751005e907;hb=48ff85596d7c1ed707a74844cfac72d736d0c71c;hp=f9aad35c30f28e2b93eb09e873c6951bc4899f6c;hpb=78f559541028faaa02884f0fd9cc955fbbf4ca47;p=kconfig-hardened-check.git diff --git a/kernel_hardening_checker/checks.py b/kernel_hardening_checker/checks.py old mode 100644 new mode 100755 index f9aad35..fda5d46 --- a/kernel_hardening_checker/checks.py +++ b/kernel_hardening_checker/checks.py @@ -91,6 +91,10 @@ def add_kconfig_checks(l: List[ChecklistObjType], arch: str) -> None: KconfigCheck('self_protection', 'defconfig', 'SPECULATION_MITIGATIONS', 'y'))] l += [OR(KconfigCheck('self_protection', 'defconfig', 'MITIGATION_RETPOLINE', 'y'), KconfigCheck('self_protection', 'defconfig', 'RETPOLINE', 'y'))] + l += [OR(KconfigCheck('self_protection', 'defconfig', 'MITIGATION_RFDS', 'y'), + cpu_sup_intel_not_set)] + l += [OR(KconfigCheck('self_protection', 'defconfig', 'MITIGATION_SPECTRE_BHI', 'y'), + cpu_sup_intel_not_set)] if arch in ('ARM64', 'ARM'): l += [KconfigCheck('self_protection', 'defconfig', 'HW_RANDOM_TPM', 'y')] l += [KconfigCheck('self_protection', 'defconfig', 'IOMMU_DEFAULT_DMA_STRICT', 'y')] @@ -131,6 +135,11 @@ def add_kconfig_checks(l: List[ChecklistObjType], arch: str) -> None: l += [KconfigCheck('self_protection', 'defconfig', 'DEBUG_ALIGN_RODATA', 'y')] # 'self_protection', 'kspp' + l += [KconfigCheck('self_protection', 'kspp', 'LIST_HARDENED', 'y')] + l += [KconfigCheck('self_protection', 'kspp', 'RANDOM_KMALLOC_CACHES', 'y')] + l += [KconfigCheck('self_protection', 'kspp', 'SLAB_MERGE_DEFAULT', 'is not set')] + l += [KconfigCheck('self_protection', 'kspp', 'PAGE_TABLE_CHECK', 'y')] + l += [KconfigCheck('self_protection', 'kspp', 'PAGE_TABLE_CHECK_ENFORCED', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'BUG_ON_DATA_CORRUPTION', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'SLAB_FREELIST_HARDENED', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'SLAB_FREELIST_RANDOM', 'y')] @@ -157,7 +166,7 @@ def add_kconfig_checks(l: List[ChecklistObjType], arch: str) -> None: vmap_stack_is_set)] kfence_is_set = KconfigCheck('self_protection', 'kspp', 'KFENCE', 'y') l += [kfence_is_set] - l += [AND(KconfigCheck('self_protection', 'a13xp0p0v', 'KFENCE_SAMPLE_INTERVAL', 'is not off'), + l += [AND(KconfigCheck('self_protection', 'kspp', 'KFENCE_SAMPLE_INTERVAL', 'is not off'), kfence_is_set)] randstruct_is_set = OR(KconfigCheck('self_protection', 'kspp', 'RANDSTRUCT_FULL', 'y'), KconfigCheck('self_protection', 'kspp', 'GCC_PLUGIN_RANDSTRUCT', 'y')) @@ -247,6 +256,7 @@ def add_kconfig_checks(l: List[ChecklistObjType], arch: str) -> None: if arch == 'ARM64': l += [KconfigCheck('self_protection', 'kspp', 'ARM64_SW_TTBR0_PAN', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'SHADOW_CALL_STACK', 'y')] + l += [KconfigCheck('self_protection', 'kspp', 'UNWIND_PATCH_PAC_INTO_SCS', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'KASAN_HW_TAGS', 'y')] # see also: kasan=on, kasan.stacktrace=off, kasan.fault=panic if arch == 'X86_32': l += [KconfigCheck('self_protection', 'kspp', 'HIGHMEM64G', 'y')] @@ -256,13 +266,6 @@ def add_kconfig_checks(l: List[ChecklistObjType], arch: str) -> None: l += [AND(KconfigCheck('self_protection', 'kspp', 'INTEL_IOMMU', 'y'), iommu_support_is_set)] - # 'self_protection', 'clipos' - l += [KconfigCheck('self_protection', 'clipos', 'SLAB_MERGE_DEFAULT', 'is not set')] - - # 'self_protection', 'a13xp0p0v' - l += [KconfigCheck('self_protection', 'a13xp0p0v', 'LIST_HARDENED', 'y')] - l += [KconfigCheck('self_protection', 'a13xp0p0v', 'RANDOM_KMALLOC_CACHES', 'y')] - # 'security_policy' if arch in ('X86_64', 'ARM64', 'X86_32'): l += [KconfigCheck('security_policy', 'defconfig', 'SECURITY', 'y')] @@ -274,12 +277,14 @@ def add_kconfig_checks(l: List[ChecklistObjType], arch: str) -> None: l += [KconfigCheck('security_policy', 'kspp', 'SECURITY_SELINUX_BOOTPARAM', 'is not set')] l += [KconfigCheck('security_policy', 'kspp', 'SECURITY_SELINUX_DEVELOP', 'is not set')] l += [KconfigCheck('security_policy', 'kspp', 'SECURITY_WRITABLE_HOOKS', 'is not set')] # refers to SECURITY_SELINUX_DISABLE - l += [KconfigCheck('security_policy', 'a13xp0p0v', 'SECURITY_SELINUX_DEBUG', 'is not set')] + l += [KconfigCheck('security_policy', 'kspp', 'SECURITY_SELINUX_DEBUG', 'is not set')] l += [OR(KconfigCheck('security_policy', 'a13xp0p0v', 'SECURITY_SELINUX', 'y'), KconfigCheck('security_policy', 'a13xp0p0v', 'SECURITY_APPARMOR', 'y'), KconfigCheck('security_policy', 'a13xp0p0v', 'SECURITY_SMACK', 'y'), KconfigCheck('security_policy', 'a13xp0p0v', 'SECURITY_TOMOYO', 'y'))] # one of major LSMs implementing MAC + # N.B. We don't use 'if arch' for the 'cut_attack_surface' checks that require 'is not set'. + # It makes the maintainance easier. These kernel options should be disabled anyway. # 'cut_attack_surface', 'defconfig' l += [KconfigCheck('cut_attack_surface', 'defconfig', 'SECCOMP', 'y')] l += [KconfigCheck('cut_attack_surface', 'defconfig', 'SECCOMP_FILTER', 'y')] @@ -311,6 +316,7 @@ def add_kconfig_checks(l: List[ChecklistObjType], arch: str) -> None: l += [KconfigCheck('cut_attack_surface', 'kspp', 'OABI_COMPAT', 'is not set')] l += [KconfigCheck('cut_attack_surface', 'kspp', 'X86_MSR', 'is not set')] # refers to LOCKDOWN l += [KconfigCheck('cut_attack_surface', 'kspp', 'LEGACY_TIOCSTI', 'is not set')] + l += [KconfigCheck('cut_attack_surface', 'kspp', 'MODULE_FORCE_LOAD', 'is not set')] l += [modules_not_set] l += [devmem_not_set] l += [OR(KconfigCheck('cut_attack_surface', 'kspp', 'IO_STRICT_DEVMEM', 'y'), @@ -384,7 +390,6 @@ def add_kconfig_checks(l: List[ChecklistObjType], arch: str) -> None: 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 l += [KconfigCheck('cut_attack_surface', 'clipos', 'KALLSYMS', 'is not set')] - l += [KconfigCheck('cut_attack_surface', 'clipos', 'MAGIC_SYSRQ', 'is not set')] l += [KconfigCheck('cut_attack_surface', 'clipos', 'KEXEC_FILE', 'is not set')] # refers to LOCKDOWN (permissive) l += [KconfigCheck('cut_attack_surface', 'clipos', 'USER_NS', 'is not set')] # user.max_user_namespaces=0 l += [KconfigCheck('cut_attack_surface', 'clipos', 'X86_CPUID', 'is not set')] @@ -393,6 +398,8 @@ def add_kconfig_checks(l: List[ChecklistObjType], arch: str) -> None: l += [KconfigCheck('cut_attack_surface', 'clipos', 'EFI_CUSTOM_SSDT_OVERLAYS', 'is not set')] l += [KconfigCheck('cut_attack_surface', 'clipos', 'AIO', 'is not set')] # l += [KconfigCheck('cut_attack_surface', 'clipos', 'IKCONFIG', 'is not set')] # no, IKCONFIG is needed for this check :) + l += [OR(KconfigCheck('cut_attack_surface', 'clipos', 'MAGIC_SYSRQ', 'is not set'), + KconfigCheck('cut_attack_surface', 'a13xp0p0v', 'MAGIC_SYSRQ_DEFAULT_ENABLE', '0x0'))] # 'cut_attack_surface', 'lockdown' l += [KconfigCheck('cut_attack_surface', 'lockdown', 'EFI_TEST', 'is not set')] # refers to LOCKDOWN @@ -411,7 +418,6 @@ def add_kconfig_checks(l: List[ChecklistObjType], arch: str) -> None: l += [KconfigCheck('cut_attack_surface', 'a13xp0p0v', 'KGDB', 'is not set')] l += [KconfigCheck('cut_attack_surface', 'a13xp0p0v', 'CORESIGHT', 'is not set')] l += [KconfigCheck('cut_attack_surface', 'a13xp0p0v', 'XFS_SUPPORT_V4', 'is not set')] - l += [KconfigCheck('cut_attack_surface', 'a13xp0p0v', 'MODULE_FORCE_LOAD', 'is not set')] l += [KconfigCheck('cut_attack_surface', 'a13xp0p0v', 'BLK_DEV_WRITE_MOUNTED', 'is not set')] l += [OR(KconfigCheck('cut_attack_surface', 'a13xp0p0v', 'TRIM_UNUSED_KSYMS', 'y'), modules_not_set)] @@ -426,7 +432,7 @@ def add_kconfig_checks(l: List[ChecklistObjType], arch: str) -> None: l += [KconfigCheck('harden_userspace', 'clipos', 'COREDUMP', 'is not set')] l += [KconfigCheck('harden_userspace', 'a13xp0p0v', 'ARCH_MMAP_RND_BITS', 'MAX')] # 'MAX' value is refined using ARCH_MMAP_RND_BITS_MAX if arch == 'X86_64': - l += [KconfigCheck('harden_userspace', 'a13xp0p0v', 'X86_USER_SHADOW_STACK', 'y')] + l += [KconfigCheck('harden_userspace', 'kspp', 'X86_USER_SHADOW_STACK', 'y')] def add_cmdline_checks(l: List[ChecklistObjType], arch: str) -> None: @@ -471,6 +477,10 @@ def add_cmdline_checks(l: List[ChecklistObjType], arch: str) -> None: l += [OR(CmdlineCheck('self_protection', 'defconfig', 'spectre_v2_user', 'is not off'), AND(CmdlineCheck('self_protection', 'kspp', 'mitigations', 'auto,nosmt'), CmdlineCheck('self_protection', 'defconfig', 'spectre_v2_user', 'is not set')))] + l += [OR(CmdlineCheck('self_protection', 'defconfig', 'spectre_bhi', 'is not off'), + AND(KconfigCheck('self_protection', 'defconfig', 'MITIGATION_SPECTRE_BHI', 'y'), + CmdlineCheck('self_protection', 'kspp', 'mitigations', 'auto,nosmt'), + CmdlineCheck('self_protection', 'defconfig', 'spectre_bhi', 'is not set')))] l += [OR(CmdlineCheck('self_protection', 'defconfig', 'spec_store_bypass_disable', 'is not off'), AND(CmdlineCheck('self_protection', 'kspp', 'mitigations', 'auto,nosmt'), CmdlineCheck('self_protection', 'defconfig', 'spec_store_bypass_disable', 'is not set')))] @@ -498,6 +508,10 @@ def add_cmdline_checks(l: List[ChecklistObjType], arch: str) -> None: l += [OR(CmdlineCheck('self_protection', 'defconfig', 'gather_data_sampling', 'is not off'), AND(CmdlineCheck('self_protection', 'kspp', 'mitigations', 'auto,nosmt'), CmdlineCheck('self_protection', 'defconfig', 'gather_data_sampling', 'is not set')))] + l += [OR(CmdlineCheck('self_protection', 'defconfig', 'reg_file_data_sampling', 'is not off'), + AND(KconfigCheck('self_protection', 'defconfig', 'MITIGATION_RFDS', 'y'), + CmdlineCheck('self_protection', 'kspp', 'mitigations', 'auto,nosmt'), + CmdlineCheck('self_protection', 'defconfig', 'reg_file_data_sampling', 'is not set')))] if arch == 'ARM64': l += [OR(CmdlineCheck('self_protection', 'defconfig', 'kpti', 'is not off'), AND(CmdlineCheck('self_protection', 'kspp', 'mitigations', 'auto,nosmt'), @@ -617,6 +631,7 @@ no_kstrtobool_options = [ 'pti', # See pti_check_boottime_disable() in arch/x86/mm/pti.c 'spectre_v2', # See spectre_v2_parse_cmdline() in arch/x86/kernel/cpu/bugs.c 'spectre_v2_user', # See spectre_v2_parse_user_cmdline() in arch/x86/kernel/cpu/bugs.c + 'spectre_bhi', # See spectre_bhi_parse_cmdline() in arch/x86/kernel/cpu/bugs.c 'spec_store_bypass_disable', # See ssb_parse_cmdline() in arch/x86/kernel/cpu/bugs.c 'l1tf', # See l1tf_cmdline() in arch/x86/kernel/cpu/bugs.c 'mds', # See mds_cmdline() in arch/x86/kernel/cpu/bugs.c @@ -628,6 +643,7 @@ no_kstrtobool_options = [ 'ssbd', # See parse_spectre_v4_param() in arch/arm64/kernel/proton-pack.c 'spec_rstack_overflow', # See srso_parse_cmdline() in arch/x86/kernel/cpu/bugs.c 'gather_data_sampling', # See gds_parse_cmdline() in arch/x86/kernel/cpu/bugs.c + 'reg_file_data_sampling', # See rfds_parse_cmdline() in arch/x86/kernel/cpu/bugs.c 'slub_debug', # See setup_slub_debug() in mm/slub.c 'iommu', # See iommu_setup() in arch/x86/kernel/pci-dma.c 'vsyscall', # See vsyscall_setup() in arch/x86/entry/vsyscall/vsyscall_64.c