# slab_nomerge
# pti=on
# kernel.kptr_restrict=1
+# lockdown=1
import sys
from argparse import ArgumentParser
else:
self.result = 'FAIL: "' + self.state + '"'
+ if self.result.startswith('OK'):
+ return True, self.result
+ else:
+ return False, self.result
+
def __repr__(self):
return '{} = {}'.format(self.name, self.state)
-def construct_opt_checks():
- checklist.append(OptCheck('BUG', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('PAGE_TABLE_ISOLATION', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('RETPOLINE', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('X86_64', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('STRICT_KERNEL_RWX', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('STRICT_MODULE_RWX', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('DEBUG_WX', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('RANDOMIZE_BASE', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('RANDOMIZE_MEMORY', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('CC_STACKPROTECTOR', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('CC_STACKPROTECTOR_STRONG','y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('VMAP_STACK', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('THREAD_INFO_IN_TASK', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('SCHED_STACK_END_CHECK', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('SLUB_DEBUG', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('SLAB_FREELIST_HARDENED', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('SLAB_FREELIST_RANDOM', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('HARDENED_USERCOPY', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('FORTIFY_SOURCE', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('MODULE_SIG', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('MODULE_SIG_ALL', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('MODULE_SIG_SHA512', 'y', 'ubuntu18', 'self_protection'))
- checklist.append(OptCheck('SYN_COOKIES', 'y', 'ubuntu18', 'self_protection')) # another reason?
- checklist.append(OptCheck('DEFAULT_MMAP_MIN_ADDR', '65536', 'ubuntu18', 'self_protection'))
+class OR:
+ def __init__(self, *opts):
+ self.opts = opts
+ self.result = None
+
+ # self.opts[0] is the option which this OR-check is about.
+ # Use case: OR(<X_is_hardened>, <X_is_disabled>)
+
+ @property
+ def name(self):
+ return self.opts[0].name
+
+ @property
+ def expected(self):
+ return self.opts[0].expected
+
+ @property
+ def state(self):
+ return self.opts[0].state
+
+ @property
+ def decision(self):
+ return self.opts[0].decision
+
+ @property
+ def reason(self):
+ return self.opts[0].reason
+
+ def check(self):
+ for i, opt in enumerate(self.opts):
+ result, msg = opt.check()
+ if result:
+ if i == 0:
+ self.result = opt.result
+ else:
+ self.result = 'CONFIG_{}: {} ("{}")'.format(opt.name, opt.result, opt.expected)
+ return True, self.result
+ self.result = self.opts[0].result
+ return False, self.result
+
+
+def construct_checklist():
+ modules_not_set = OptCheck('MODULES', 'is not set', 'kspp', 'cut_attack_surface')
+ devmem_not_set = OptCheck('DEVMEM', 'is not set', 'kspp', 'cut_attack_surface')
+
+ checklist.append(OptCheck('BUG', 'y', 'ubuntu18', 'self_protection'))
+ checklist.append(OptCheck('PAGE_TABLE_ISOLATION', 'y', 'ubuntu18', 'self_protection'))
+ checklist.append(OptCheck('RETPOLINE', 'y', 'ubuntu18', 'self_protection'))
+ checklist.append(OptCheck('X86_64', 'y', 'ubuntu18', 'self_protection'))
+ checklist.append(OR(OptCheck('STRICT_KERNEL_RWX', 'y', 'ubuntu18', 'self_protection'), \
+ OptCheck('DEBUG_RODATA', 'y', 'before_v4.11', 'self_protection')))
+ checklist.append(OptCheck('DEBUG_WX', 'y', 'ubuntu18', 'self_protection'))
+ checklist.append(OptCheck('RANDOMIZE_BASE', 'y', 'ubuntu18', 'self_protection'))
+ checklist.append(OptCheck('RANDOMIZE_MEMORY', 'y', 'ubuntu18', 'self_protection'))
+ checklist.append(OR(OptCheck('STACKPROTECTOR_STRONG', 'y', 'ubuntu18', 'self_protection'), \
+ OptCheck('CC_STACKPROTECTOR_STRONG', 'y', 'ubuntu18', 'self_protection')))
+ checklist.append(OptCheck('VMAP_STACK', 'y', 'ubuntu18', 'self_protection'))
+ checklist.append(OptCheck('THREAD_INFO_IN_TASK', 'y', 'ubuntu18', 'self_protection'))
+ checklist.append(OptCheck('SCHED_STACK_END_CHECK', 'y', 'ubuntu18', 'self_protection'))
+ checklist.append(OptCheck('SLUB_DEBUG', 'y', 'ubuntu18', 'self_protection'))
+ checklist.append(OptCheck('SLAB_FREELIST_HARDENED', 'y', 'ubuntu18', 'self_protection'))
+ checklist.append(OptCheck('SLAB_FREELIST_RANDOM', 'y', 'ubuntu18', 'self_protection'))
+ checklist.append(OptCheck('HARDENED_USERCOPY', 'y', 'ubuntu18', 'self_protection'))
+ checklist.append(OptCheck('FORTIFY_SOURCE', 'y', 'ubuntu18', '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', 'ubuntu18', 'self_protection'), \
+ OptCheck('DEBUG_SET_MODULE_RONX', 'y', 'before_v4.11', 'self_protection'), \
+ modules_not_set))
+ checklist.append(OR(OptCheck('MODULE_SIG', 'y', 'ubuntu18', 'self_protection'), \
+ modules_not_set))
+ checklist.append(OR(OptCheck('MODULE_SIG_ALL', 'y', 'ubuntu18', 'self_protection'), \
+ modules_not_set))
+ checklist.append(OR(OptCheck('MODULE_SIG_SHA512', 'y', 'ubuntu18', 'self_protection'), \
+ modules_not_set))
+ checklist.append(OptCheck('SYN_COOKIES', 'y', 'ubuntu18', 'self_protection')) # another reason?
+ checklist.append(OptCheck('DEFAULT_MMAP_MIN_ADDR', '65536', 'ubuntu18', 'self_protection'))
checklist.append(OptCheck('BUG_ON_DATA_CORRUPTION', 'y', 'kspp', 'self_protection'))
checklist.append(OptCheck('PAGE_POISONING', 'y', 'kspp', 'self_protection'))
checklist.append(OptCheck('SECCOMP', 'y', 'ubuntu18', 'cut_attack_surface'))
checklist.append(OptCheck('SECCOMP_FILTER', 'y', 'ubuntu18', 'cut_attack_surface'))
- checklist.append(OptCheck('STRICT_DEVMEM', 'y', 'ubuntu18', 'cut_attack_surface'))
+ checklist.append(OR(OptCheck('STRICT_DEVMEM', 'y', 'ubuntu18', 'cut_attack_surface'), \
+ devmem_not_set))
checklist.append(OptCheck('ACPI_CUSTOM_METHOD', 'is not set', 'ubuntu18', 'cut_attack_surface'))
checklist.append(OptCheck('COMPAT_BRK', 'is not set', 'ubuntu18', 'cut_attack_surface'))
checklist.append(OptCheck('DEVKMEM', '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('IO_STRICT_DEVMEM', 'y', 'kspp', 'cut_attack_surface'))
+ checklist.append(OR(OptCheck('IO_STRICT_DEVMEM', 'y', 'kspp', 'cut_attack_surface'), \
+ devmem_not_set))
checklist.append(OptCheck('LEGACY_VSYSCALL_NONE', 'y', 'kspp', 'cut_attack_surface')) # 'vsyscall=none'
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('ARCH_MMAP_RND_BITS', '32', 'my', 'userspace_protection'))
- checklist.append(OptCheck('LKDTM', 'm', 'my', 'feature_test'))
+# checklist.append(OptCheck('LKDTM', 'm', 'my', 'feature_test'))
-def print_opt_checks():
+def print_checklist():
print('[+] Printing kernel hardening preferences...')
- print(' {:<39}|{:^13}|{:^10}|{:^20}'.format('option name', 'desired val', 'decision', 'reason'))
- print(' ======================================================================================')
+ print(' {:<39}|{:^13}|{:^10}|{:^20}'.format(
+ 'option name', 'desired val', 'decision', 'reason'))
+ print(' ' + '=' * 86)
for opt in checklist:
- print(' CONFIG_{:<32}|{:^13}|{:^10}|{:^20}'.format(opt.name, opt.expected, opt.decision, opt.reason))
+ print(' CONFIG_{:<32}|{:^13}|{:^10}|{:^20}'.format(
+ opt.name, opt.expected, opt.decision, opt.reason))
print()
def print_check_results():
- print(' {:<39}|{:^13}|{:^10}|{:^20}||{:^20}'.format('option name', 'desired val', 'decision', 'reason', 'check result'))
- print(' ===========================================================================================================')
+ print(' {:<39}|{:^13}|{:^10}|{:^20}||{:^28}'.format(
+ 'option name', 'desired val', 'decision', 'reason', 'check result'))
+ print(' ' + '=' * 115)
for opt in checklist:
- print(' CONFIG_{:<32}|{:^13}|{:^10}|{:^20}||{:^20}'.format(opt.name, opt.expected, opt.decision, opt.reason, opt.result))
+ print(' CONFIG_{:<32}|{:^13}|{:^10}|{:^20}||{:^28}'.format(
+ opt.name, opt.expected, opt.decision, opt.reason, opt.result))
print()
def get_option_state(options, name):
- return options[name] if name in options else None
+ return options.get(name, None)
def perform_checks(parsed_options):
for opt in checklist:
- opt.state = get_option_state(parsed_options, opt.name)
+ if hasattr(opt, 'opts'):
+ for o in opt.opts:
+ o.state = get_option_state(parsed_options, o.name)
+ else:
+ opt.state = get_option_state(parsed_options, opt.name)
opt.check()
parser.add_argument('--debug', action='store_true', help='enable internal debug mode')
args = parser.parse_args()
- construct_opt_checks()
+ construct_checklist()
if args.print:
- print_opt_checks()
+ print_checklist()
sys.exit(0)
if args.debug:
projects / kconfig-hardened-check.git / blobdiff