import re
debug_mode = False # set it to True to print the unknown options from the config
+
+supported_archs = [ 'X86_64' ]
+
checklist = []
return False, self.result
-def construct_checklist():
+def detect_arch(fname):
+ with open(fname, 'r') as f:
+ arch_pattern = re.compile("CONFIG_[a-zA-Z0-9_]*=y")
+ arch = None
+ msg = None
+ print('[+] Trying to detect architecture in "{}"...'.format(fname))
+ for line in f.readlines():
+ if arch_pattern.match(line):
+ option, value = line[7:].split('=', 1)
+ if option in supported_archs:
+ if not arch:
+ arch = option
+ else:
+ return None, 'more than one supported architecture is detected'
+ if not arch:
+ return None, 'failed to detect architecture'
+ else:
+ return arch, 'OK'
+
+
+def construct_checklist(arch):
modules_not_set = OptCheck('MODULES', 'is not set', 'kspp', 'cut_attack_surface')
devmem_not_set = OptCheck('DEVMEM', 'is not set', 'kspp', 'cut_attack_surface') # refers to LOCK_DOWN_KERNEL
checklist.append(OptCheck('BUG', 'y', 'defconfig', 'self_protection'))
checklist.append(OptCheck('PAGE_TABLE_ISOLATION', 'y', 'defconfig', 'self_protection'))
checklist.append(OptCheck('RETPOLINE', 'y', 'defconfig', 'self_protection'))
- checklist.append(OptCheck('X86_64', 'y', 'defconfig', 'self_protection'))
checklist.append(OptCheck('X86_SMAP', 'y', 'defconfig', 'self_protection'))
checklist.append(OptCheck('X86_INTEL_UMIP', 'y', 'defconfig', 'self_protection'))
checklist.append(OR(OptCheck('STRICT_KERNEL_RWX', 'y', 'defconfig', 'self_protection'), \
checklist.append(OptCheck('VMAP_STACK', 'y', 'defconfig', 'self_protection'))
checklist.append(OptCheck('THREAD_INFO_IN_TASK', 'y', 'defconfig', 'self_protection'))
checklist.append(OptCheck('SLUB_DEBUG', 'y', 'defconfig', 'self_protection'))
- checklist.append(OptCheck('LOCK_DOWN_KERNEL', 'y', 'ubuntu18', 'self_protection')) # remember about LOCK_DOWN_MANDATORY
checklist.append(OR(OptCheck('STRICT_MODULE_RWX', 'y', 'defconfig', 'self_protection'), \
OptCheck('DEBUG_SET_MODULE_RONX', 'y', 'defconfig', 'self_protection'), \
modules_not_set)) # DEBUG_SET_MODULE_RONX was before v4.11
checklist.append(OptCheck('DEFAULT_MMAP_MIN_ADDR', '65536', 'kspp', 'self_protection'))
checklist.append(OptCheck('GCC_PLUGIN_STACKLEAK', 'y', 'my', 'self_protection'))
+ checklist.append(OptCheck('LOCK_DOWN_KERNEL', 'y', 'my', 'self_protection')) # remember about LOCK_DOWN_MANDATORY
checklist.append(OptCheck('SLUB_DEBUG_ON', 'y', 'my', 'self_protection'))
checklist.append(OptCheck('SECURITY_DMESG_RESTRICT', 'y', 'my', 'self_protection'))
checklist.append(OptCheck('STATIC_USERMODEHELPER', 'y', 'my', 'self_protection')) # breaks systemd?
checklist.append(OptCheck('COMPAT_BRK', 'is not set', 'kspp', 'cut_attack_surface'))
checklist.append(OptCheck('DEVKMEM', 'is not set', 'kspp', 'cut_attack_surface'))
checklist.append(OptCheck('COMPAT_VDSO', 'is not set', 'kspp', 'cut_attack_surface'))
- checklist.append(OptCheck('X86_PTDUMP', 'is not set', 'ubuntu18', 'cut_attack_surface'))
- checklist.append(OptCheck('ZSMALLOC_STAT', 'is not set', 'ubuntu18', 'cut_attack_surface'))
- checklist.append(OptCheck('PAGE_OWNER', 'is not set', 'ubuntu18', 'cut_attack_surface'))
- checklist.append(OptCheck('DEBUG_KMEMLEAK', 'is not set', 'ubuntu18', 'cut_attack_surface'))
- checklist.append(OptCheck('BINFMT_AOUT', 'is not set', 'ubuntu18', 'cut_attack_surface'))
- checklist.append(OptCheck('MMIOTRACE_TEST', 'is not set', 'ubuntu18', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL
checklist.append(OptCheck('BINFMT_MISC', 'is not set', 'kspp', 'cut_attack_surface'))
checklist.append(OptCheck('INET_DIAG', 'is not set', 'kspp', 'cut_attack_surface'))
checklist.append(OptCheck('KEXEC', 'is not set', 'kspp', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL
checklist.append(OptCheck('MODIFY_LDT_SYSCALL', 'is not set', 'kspp', 'cut_attack_surface'))
checklist.append(OptCheck('HIBERNATION', 'is not set', 'kspp', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL
+ checklist.append(OptCheck('X86_PTDUMP', 'is not set', 'grsecurity', 'cut_attack_surface'))
+ checklist.append(OptCheck('ZSMALLOC_STAT', 'is not set', 'grsecurity', 'cut_attack_surface'))
+ checklist.append(OptCheck('PAGE_OWNER', 'is not set', 'grsecurity', 'cut_attack_surface'))
+ checklist.append(OptCheck('DEBUG_KMEMLEAK', 'is not set', 'grsecurity', 'cut_attack_surface'))
+ checklist.append(OptCheck('BINFMT_AOUT', 'is not set', 'grsecurity', 'cut_attack_surface'))
checklist.append(OptCheck('KPROBES', 'is not set', 'grsecurity', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL
checklist.append(OptCheck('UPROBES', 'is not set', 'grsecurity', 'cut_attack_surface'))
checklist.append(OptCheck('GENERIC_TRACER', 'is not set', 'grsecurity', 'cut_attack_surface'))
checklist.append(OptCheck('ACPI_APEI_EINJ', 'is not set', 'lockdown', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL
checklist.append(OptCheck('PROFILING', 'is not set', 'lockdown', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL
checklist.append(OptCheck('BPF_SYSCALL', 'is not set', 'lockdown', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL
+ checklist.append(OptCheck('MMIOTRACE_TEST', 'is not set', 'lockdown', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL
checklist.append(OptCheck('MMIOTRACE', 'is not set', 'my', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL (permissive)
checklist.append(OptCheck('KEXEC_FILE', 'is not set', 'my', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL (permissive)
# checklist.append(OptCheck('LKDTM', 'm', 'my', 'feature_test'))
-def print_checklist():
- print('[+] Printing kernel hardening preferences...')
+def print_checklist(arch):
+ print('[+] Printing kernel hardening preferences for {}...'.format(arch))
print(' {:<39}|{:^13}|{:^10}|{:^20}'.format(
'option name', 'desired val', 'decision', 'reason'))
print(' ' + '=' * 86)
if __name__ == '__main__':
parser = ArgumentParser(description='Checks the hardening options in the Linux kernel config')
- parser.add_argument('-p', '--print', action='store_true', help='print hardening preferences')
- parser.add_argument('-c', '--config', help='check the config_file against these preferences')
- parser.add_argument('--debug', action='store_true', help='enable internal debug mode')
+ parser.add_argument('-p', '--print', choices=supported_archs,
+ help='print hardening preferences for selected architecture')
+ parser.add_argument('-c', '--config',
+ help='check the config_file against these preferences')
+ parser.add_argument('--debug', action='store_true',
+ help='enable internal debug mode')
args = parser.parse_args()
- construct_checklist()
-
- if args.print:
- print_checklist()
- sys.exit(0)
-
if args.debug:
debug_mode = True
if args.config:
+ arch, msg = detect_arch(args.config)
+ if not arch:
+ sys.exit('[!] ERROR: {}'.format(msg))
+ else:
+ print('[+] Detected architecture: {}'.format(arch))
+
+ construct_checklist(arch)
check_config_file(args.config)
error_count = len(list(filter(lambda opt: opt.result.startswith('FAIL'), checklist)))
if error_count == 0:
else:
sys.exit('[-] config check is NOT PASSED: {} errors'.format(error_count))
+ if args.print:
+ arch = args.print
+ construct_checklist(arch)
+ print_checklist(arch)
+ sys.exit(0)
+
parser.print_help()
projects / kconfig-hardened-check.git / blobdiff