Add the MAGIC_SYSRQ_DEFAULT_ENABLE check

[kconfig-hardened-check.git] / kernel_hardening_checker / checks.py

diff --git a/kernel_hardening_checker/checks.py b/kernel_hardening_checker/checks.py
old mode 100644 (file)
new mode 100755 (executable)
index 07364d7..fda5d46
--- a/kernel_hardening_checker/checks.py
+++ b/kernel_hardening_checker/checks.py
@@ -135,6 +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')]
@@ -161,7 +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'))
@@ -251,6 +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')]
@@ -260,13 +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')]
@@ -278,12 +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')]
@@ -315,6 +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'),
@@ -388,7 +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')]
@@ -397,6 +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
@@ -415,7 +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)]
@@ -430,7 +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: