X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=kernel_hardening_checker%2Fchecks.py;h=b5ed92505e41f955597a5c90fc3cac5bd7dec6bd;hb=98ccb216ebc61a231207830f0b6b37c8133d0d48;hp=e172e96796b90a2cdbbd27f1efcf190a86b21d07;hpb=154f1be2e8b8f6c04476288be59a787f1fda3f5e;p=kconfig-hardened-check.git diff --git a/kernel_hardening_checker/checks.py b/kernel_hardening_checker/checks.py index e172e96..b5ed925 100644 --- a/kernel_hardening_checker/checks.py +++ b/kernel_hardening_checker/checks.py @@ -9,7 +9,7 @@ This module contains knowledge for checks. """ # pylint: disable=missing-function-docstring,line-too-long,invalid-name -# pylint: disable=too-many-branches,too-many-statements +# pylint: disable=too-many-branches,too-many-statements,too-many-locals from .engine import KconfigCheck, CmdlineCheck, SysctlCheck, VersionCheck, OR, AND @@ -57,8 +57,9 @@ def add_kconfig_checks(l, arch): KconfigCheck('self_protection', 'kspp', 'GCC_PLUGIN_STRUCTLEAK_BYREF_ALL', 'y'))] if arch in ('X86_64', 'ARM64', 'X86_32'): l += [KconfigCheck('self_protection', 'defconfig', 'RANDOMIZE_BASE', 'y')] + vmap_stack_is_set = KconfigCheck('self_protection', 'defconfig', 'VMAP_STACK', 'y') if arch in ('X86_64', 'ARM64', 'ARM'): - l += [KconfigCheck('self_protection', 'defconfig', 'VMAP_STACK', 'y')] + l += [vmap_stack_is_set] if arch in ('X86_64', 'X86_32'): l += [KconfigCheck('self_protection', 'defconfig', 'SPECULATION_MITIGATIONS', 'y')] l += [KconfigCheck('self_protection', 'defconfig', 'DEBUG_WX', 'y')] @@ -118,7 +119,6 @@ def add_kconfig_checks(l, arch): # 'self_protection', 'kspp' l += [KconfigCheck('self_protection', 'kspp', 'BUG_ON_DATA_CORRUPTION', 'y')] - l += [KconfigCheck('self_protection', 'kspp', 'SCHED_STACK_END_CHECK', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'SLAB_FREELIST_HARDENED', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'SLAB_FREELIST_RANDOM', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'SHUFFLE_PAGE_ALLOCATOR', 'y')] @@ -127,10 +127,19 @@ def add_kconfig_checks(l, arch): l += [KconfigCheck('self_protection', 'kspp', 'DEBUG_VIRTUAL', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'DEBUG_SG', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'DEBUG_CREDENTIALS', 'y')] - l += [KconfigCheck('self_protection', 'kspp', 'DEBUG_NOTIFIERS', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'INIT_ON_ALLOC_DEFAULT_ON', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'STATIC_USERMODEHELPER', 'y')] # needs userspace support l += [KconfigCheck('self_protection', 'kspp', 'SCHED_CORE', 'y')] + l += [KconfigCheck('self_protection', 'kspp', 'SECURITY_LOCKDOWN_LSM', 'y')] + l += [KconfigCheck('self_protection', 'kspp', 'SECURITY_LOCKDOWN_LSM_EARLY', 'y')] + l += [KconfigCheck('self_protection', 'kspp', 'LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY', 'y')] + cfi_clang_is_set = KconfigCheck('self_protection', 'kspp', 'CFI_CLANG', 'y') + cfi_clang_permissive_not_set = KconfigCheck('self_protection', 'kspp', 'CFI_PERMISSIVE', 'is not set') + l += [OR(KconfigCheck('self_protection', 'kspp', 'DEBUG_NOTIFIERS', 'y'), + AND(cfi_clang_is_set, + cfi_clang_permissive_not_set))] + l += [OR(KconfigCheck('self_protection', 'kspp', 'SCHED_STACK_END_CHECK', 'y'), + vmap_stack_is_set)] kfence_is_set = KconfigCheck('self_protection', 'kspp', 'KFENCE', 'y') l += [kfence_is_set] l += [AND(KconfigCheck('self_protection', 'my', 'KFENCE_SAMPLE_INTERVAL', 'is not off'), @@ -154,6 +163,7 @@ def add_kconfig_checks(l, arch): l += [OR(KconfigCheck('self_protection', 'kspp', 'MODULE_SIG_ALL', 'y'), modules_not_set)] l += [OR(KconfigCheck('self_protection', 'kspp', 'MODULE_SIG_SHA512', 'y'), + KconfigCheck('self_protection', 'my', 'MODULE_SIG_SHA3_512', 'y'), modules_not_set)] l += [OR(KconfigCheck('self_protection', 'kspp', 'MODULE_SIG_FORCE', 'y'), modules_not_set)] # refers to LOCKDOWN @@ -194,9 +204,8 @@ def add_kconfig_checks(l, arch): gcc_plugins_support_is_set)] l += [KconfigCheck('self_protection', 'kspp', 'RANDOMIZE_KSTACK_OFFSET_DEFAULT', 'y')] if arch in ('X86_64', 'ARM64'): - cfi_clang_is_set = KconfigCheck('self_protection', 'kspp', 'CFI_CLANG', 'y') l += [cfi_clang_is_set] - l += [AND(KconfigCheck('self_protection', 'kspp', 'CFI_PERMISSIVE', 'is not set'), + l += [AND(cfi_clang_permissive_not_set, cfi_clang_is_set)] if arch in ('X86_64', 'X86_32'): l += [KconfigCheck('self_protection', 'kspp', 'HW_RANDOM_TPM', 'y')] @@ -244,9 +253,6 @@ def add_kconfig_checks(l, arch): l += [KconfigCheck('security_policy', 'kspp', 'SECURITY_SELINUX_DISABLE', 'is not set')] 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_LOCKDOWN_LSM', 'y')] - l += [KconfigCheck('security_policy', 'kspp', 'SECURITY_LOCKDOWN_LSM_EARLY', 'y')] - l += [KconfigCheck('security_policy', 'kspp', 'LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY', 'y')] l += [KconfigCheck('security_policy', 'kspp', 'SECURITY_WRITABLE_HOOKS', 'is not set')] # refers to SECURITY_SELINUX_DISABLE l += [KconfigCheck('security_policy', 'my', 'SECURITY_SELINUX_DEBUG', 'is not set')] l += [OR(KconfigCheck('security_policy', 'my', 'SECURITY_SELINUX', 'y'), @@ -564,6 +570,11 @@ def add_cmdline_checks(l, arch): # 'cut_attack_surface', 'my' l += [CmdlineCheck('cut_attack_surface', 'my', 'sysrq_always_enabled', 'is not set')] + if arch == 'X86_64': + l += [OR(CmdlineCheck('cut_attack_surface', 'my', 'ia32_emulation', '0'), + KconfigCheck('cut_attack_surface', 'kspp', 'IA32_EMULATION', 'is not set'), + AND(KconfigCheck('cut_attack_surface', 'my', 'IA32_EMULATION_DEFAULT_DISABLED', 'y'), + CmdlineCheck('cut_attack_surface', 'my', 'ia32_emulation', 'is not set')))] # 'harden_userspace' l += [CmdlineCheck('harden_userspace', 'defconfig', 'norandmaps', 'is not set')] @@ -622,7 +633,7 @@ def normalize_cmdline_options(option, value): # kernel.warn_limit (think about a proper value) # net.ipv4.tcp_syncookies=1 (?) -def add_sysctl_checks(l, arch): +def add_sysctl_checks(l, _arch): # This function may be called with arch=None # Calling the SysctlCheck class constructor: