X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=kconfig_hardened_check%2F__init__.py;h=8daa93461f5a39d93f94261b5156a2e54df3c72c;hb=9d342aac6484b2bc4eedc538e6875c8e2fe93699;hp=79a93dcad4eded434798440313924bbc845bebe9;hpb=ee10c9a4b3466a307e4c9324cb6136803fc21551;p=kconfig-hardened-check.git diff --git a/kconfig_hardened_check/__init__.py b/kconfig_hardened_check/__init__.py index 79a93dc..8daa934 100644 --- a/kconfig_hardened_check/__init__.py +++ b/kconfig_hardened_check/__init__.py @@ -58,11 +58,9 @@ # what about bpf_jit_enable? # kernel.unprivileged_bpf_disabled=1 # net.core.bpf_jit_harden=2 -# # vm.unprivileged_userfaultfd=0 # (at first, it disabled unprivileged userfaultfd, # and since v5.11 it enables unprivileged userfaultfd for user-mode only) -# # dev.tty.ldisc_autoload=0 # fs.protected_symlinks=1 # fs.protected_hardlinks=1 @@ -70,6 +68,7 @@ # fs.protected_regular=2 # fs.suid_dumpable=0 # kernel.modules_disabled=1 +# kernel.randomize_va_space = 2 # pylint: disable=missing-module-docstring,missing-class-docstring,missing-function-docstring @@ -97,6 +96,10 @@ class OptCheck: self.state = None self.result = None + @property + def type(self): + return None + def check(self): # handle the option presence check if self.expected is None: @@ -235,11 +238,18 @@ class OR(ComplexOptCheck): for i, opt in enumerate(self.opts): opt.check() if opt.result.startswith('OK'): - if opt.result == 'OK' and i != 0: - # Simple OK is not enough for additional checks, add more info: - self.result = 'OK: {} "{}"'.format(opt.name, opt.expected) - else: - self.result = opt.result + self.result = opt.result + # Add more info for additional checks: + if i != 0: + if opt.result == 'OK': + self.result = 'OK: {} "{}"'.format(opt.name, opt.expected) + elif opt.result == 'OK: not found': + self.result = 'OK: {} not found'.format(opt.name) + elif opt.result == 'OK: is present': + self.result = 'OK: {} is present'.format(opt.name) + # VersionCheck provides enough info + elif not opt.result.startswith('OK: version'): + sys.exit('[!] ERROR: unexpected OK description "{}"'.format(opt.result)) return self.result = self.opts[0].result @@ -265,8 +275,10 @@ class AND(ComplexOptCheck): elif opt.result == 'FAIL: not present': self.result = 'FAIL: {} not present'.format(opt.name) else: - # This FAIL message is self-explaining. + # VersionCheck provides enough info self.result = opt.result + if not opt.result.startswith('FAIL: version'): + sys.exit('[!] ERROR: unexpected FAIL description "{}"'.format(opt.result)) return sys.exit('[!] ERROR: invalid AND check') @@ -317,6 +329,8 @@ def add_kconfig_checks(l, arch): l += [KconfigCheck('self_protection', 'defconfig', 'BUG', 'y')] l += [KconfigCheck('self_protection', 'defconfig', 'SLUB_DEBUG', 'y')] l += [KconfigCheck('self_protection', 'defconfig', 'GCC_PLUGINS', 'y')] + l += [OR(KconfigCheck('self_protection', 'defconfig', 'STACKPROTECTOR', 'y'), + KconfigCheck('self_protection', 'defconfig', 'CC_STACKPROTECTOR', 'y'))] l += [OR(KconfigCheck('self_protection', 'defconfig', 'STACKPROTECTOR_STRONG', 'y'), KconfigCheck('self_protection', 'defconfig', 'CC_STACKPROTECTOR_STRONG', 'y'))] l += [OR(KconfigCheck('self_protection', 'defconfig', 'STRICT_KERNEL_RWX', 'y'), @@ -363,6 +377,7 @@ def add_kconfig_checks(l, arch): VersionCheck((5, 10)))] # HARDEN_BRANCH_PREDICTOR is enabled by default since v5.10 l += [KconfigCheck('self_protection', 'defconfig', 'MITIGATE_SPECTRE_BRANCH_HISTORY', 'y')] l += [KconfigCheck('self_protection', 'defconfig', 'ARM64_MTE', 'y')] + l += [KconfigCheck('self_protection', 'defconfig', 'RANDOMIZE_MODULE_REGION_FULL', 'y')] if arch == 'ARM': l += [KconfigCheck('self_protection', 'defconfig', 'CPU_SW_DOMAIN_PAN', 'y')] l += [KconfigCheck('self_protection', 'defconfig', 'HARDEN_BRANCH_PREDICTOR', 'y')] @@ -386,6 +401,7 @@ def add_kconfig_checks(l, arch): l += [KconfigCheck('self_protection', 'kspp', 'KFENCE', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'WERROR', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'IOMMU_DEFAULT_DMA_STRICT', 'y')] + l += [KconfigCheck('self_protection', 'kspp', 'ZERO_CALL_USED_REGS', 'y')] randstruct_is_set = KconfigCheck('self_protection', 'kspp', 'GCC_PLUGIN_RANDSTRUCT', 'y') l += [randstruct_is_set] hardened_usercopy_is_set = KconfigCheck('self_protection', 'kspp', 'HARDENED_USERCOPY', 'y') @@ -415,8 +431,8 @@ def add_kconfig_checks(l, arch): stackleak_is_set = KconfigCheck('self_protection', 'kspp', 'GCC_PLUGIN_STACKLEAK', 'y') l += [stackleak_is_set] l += [KconfigCheck('self_protection', 'kspp', 'RANDOMIZE_KSTACK_OFFSET_DEFAULT', 'y')] - l += [KconfigCheck('self_protection', 'kspp', 'SCHED_CORE', 'y')] if arch in ('X86_64', 'X86_32'): + l += [KconfigCheck('self_protection', 'kspp', 'SCHED_CORE', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'DEFAULT_MMAP_MIN_ADDR', '65536')] if arch in ('ARM64', 'ARM'): l += [KconfigCheck('self_protection', 'kspp', 'DEFAULT_MMAP_MIN_ADDR', '32768')] @@ -483,11 +499,11 @@ def add_kconfig_checks(l, arch): if arch == 'ARM': l += [KconfigCheck('security_policy', 'kspp', 'SECURITY', 'y')] # and choose your favourite LSM l += [KconfigCheck('security_policy', 'kspp', 'SECURITY_YAMA', 'y')] - l += [OR(KconfigCheck('security_policy', 'my', 'SECURITY_WRITABLE_HOOKS', 'is not set'), - KconfigCheck('security_policy', 'kspp', 'SECURITY_SELINUX_DISABLE', 'is not set'))] + l += [KconfigCheck('security_policy', 'kspp', 'SECURITY_SELINUX_DISABLE', 'is not set')] l += [KconfigCheck('security_policy', 'clipos', 'SECURITY_LOCKDOWN_LSM', 'y')] l += [KconfigCheck('security_policy', 'clipos', 'SECURITY_LOCKDOWN_LSM_EARLY', 'y')] l += [KconfigCheck('security_policy', 'clipos', 'LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY', 'y')] + l += [KconfigCheck('security_policy', 'my', 'SECURITY_WRITABLE_HOOKS', 'is not set')] # refers to SECURITY_SELINUX_DISABLE l += [KconfigCheck('security_policy', 'my', 'SECURITY_SAFESETID', 'y')] loadpin_is_set = KconfigCheck('security_policy', 'my', 'SECURITY_LOADPIN', 'y') l += [loadpin_is_set] # needs userspace support @@ -518,6 +534,7 @@ def add_kconfig_checks(l, arch): l += [KconfigCheck('cut_attack_surface', 'kspp', 'X86_X32', 'is not set')] l += [KconfigCheck('cut_attack_surface', 'kspp', 'MODIFY_LDT_SYSCALL', 'is not set')] 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 += [modules_not_set] l += [devmem_not_set] l += [OR(KconfigCheck('cut_attack_surface', 'kspp', 'IO_STRICT_DEVMEM', 'y'), @@ -574,6 +591,7 @@ def add_kconfig_checks(l, arch): l += [KconfigCheck('cut_attack_surface', 'maintainer', 'FB', 'is not set')] # recommended by Daniel Vetter in /issues/38 l += [KconfigCheck('cut_attack_surface', 'maintainer', 'VT', 'is not set')] # recommended by Daniel Vetter in /issues/38 l += [KconfigCheck('cut_attack_surface', 'maintainer', 'BLK_DEV_FD', 'is not set')] # recommended by Denis Efremov in /pull/54 + l += [KconfigCheck('cut_attack_surface', 'maintainer', 'BLK_DEV_FD_RAWCMD', 'is not set')] # recommended by Denis Efremov in /pull/62 # 'cut_attack_surface', 'grapheneos' l += [KconfigCheck('cut_attack_surface', 'grapheneos', 'AIO', 'is not set')] @@ -587,7 +605,6 @@ def add_kconfig_checks(l, arch): 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_MSR', 'is not set')] # refers to LOCKDOWN l += [KconfigCheck('cut_attack_surface', 'clipos', 'X86_CPUID', 'is not set')] l += [KconfigCheck('cut_attack_surface', 'clipos', 'X86_IOPL_IOPERM', 'is not set')] # refers to LOCKDOWN l += [KconfigCheck('cut_attack_surface', 'clipos', 'ACPI_TABLE_UPGRADE', 'is not set')] # refers to LOCKDOWN @@ -613,14 +630,13 @@ def add_kconfig_checks(l, arch): l += [KconfigCheck('cut_attack_surface', 'my', 'FTRACE', 'is not set')] # refers to LOCKDOWN l += [KconfigCheck('cut_attack_surface', 'my', 'VIDEO_VIVID', 'is not set')] l += [KconfigCheck('cut_attack_surface', 'my', 'INPUT_EVBUG', 'is not set')] # Can be used as a keylogger + l += [KconfigCheck('cut_attack_surface', 'my', 'KGDB', 'is not set')] # 'harden_userspace' if arch in ('X86_64', 'ARM64', 'X86_32'): l += [KconfigCheck('harden_userspace', 'defconfig', 'INTEGRITY', 'y')] if arch == 'ARM': l += [KconfigCheck('harden_userspace', 'my', 'INTEGRITY', 'y')] - if arch == 'ARM64': - l += [KconfigCheck('harden_userspace', 'defconfig', 'ARM64_MTE', 'y')] if arch in ('ARM', 'X86_32'): l += [KconfigCheck('harden_userspace', 'defconfig', 'VMSPLIT_3G', 'y')] if arch in ('X86_64', 'ARM64'): @@ -705,6 +721,8 @@ def print_checklist(mode, checklist, with_results): def populate_simple_opt_with_data(opt, data, data_type): if opt.type == 'complex': sys.exit('[!] ERROR: unexpected ComplexOptCheck {}: {}'.format(opt.name, vars(opt))) + if opt.type not in TYPES_OF_CHECKS: + sys.exit('[!] ERROR: invalid opt type "{}" for {}'.format(opt.type, opt.name)) if data_type not in TYPES_OF_CHECKS: sys.exit('[!] ERROR: invalid data type "{}"'.format(data_type)) @@ -715,6 +733,8 @@ def populate_simple_opt_with_data(opt, data, data_type): opt.state = data.get(opt.name, None) elif data_type == 'version': opt.ver = data + else: + sys.exit('[!] ERROR: unexpected data type "{}"'.format(data_type)) def populate_opt_with_data(opt, data, data_type):