X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=kconfig-hardened-check.py;h=834c40c5b9a440bfe084d35bfdbf669017e96926;hb=57b1cb15f4137c8a35b6030464006a14c7bf7e8a;hp=e784d073fdf32b658dda9b78ab33899a25296a55;hpb=b68eb59c9d222478af8f7b6aeb76801456f3d301;p=kconfig-hardened-check.git diff --git a/kconfig-hardened-check.py b/kconfig-hardened-check.py index e784d07..834c40c 100755 --- a/kconfig-hardened-check.py +++ b/kconfig-hardened-check.py @@ -15,204 +15,299 @@ # slab_nomerge # pti=on # kernel.kptr_restrict=1 +# lockdown=1 -import sys, getopt -from collections import namedtuple +import sys +from argparse import ArgumentParser +from collections import OrderedDict import re debug_mode = False # set it to True to print the unknown options from the config -error_count = 0 -opt_list = [] - -Opt = namedtuple('Opt', ['name', 'state', 'decision', 'reason']) - -def construct_opt_list(): - opt_list.append([Opt('BUG', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('PAGE_TABLE_ISOLATION', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('RETPOLINE', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('X86_64', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('STRICT_KERNEL_RWX', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('STRICT_MODULE_RWX', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('DEBUG_WX', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('RANDOMIZE_BASE', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('RANDOMIZE_MEMORY', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('CC_STACKPROTECTOR_STRONG','y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('VMAP_STACK', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('THREAD_INFO_IN_TASK', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('SCHED_STACK_END_CHECK', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('SLUB_DEBUG', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('SLAB_FREELIST_HARDENED', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('SLAB_FREELIST_RANDOM', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('HARDENED_USERCOPY', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('FORTIFY_SOURCE', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('STRICT_DEVMEM', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('SYN_COOKIES', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('SECCOMP', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('SECCOMP_FILTER', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('MODULE_SIG', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('MODULE_SIG_ALL', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('MODULE_SIG_SHA512', 'y', 'ubuntu18', 'self_protection'), '']) - opt_list.append([Opt('DEFAULT_MMAP_MIN_ADDR', '65536', 'ubuntu18', 'self_protection'), '']) - - opt_list.append([Opt('BUG_ON_DATA_CORRUPTION', 'y', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('PAGE_POISONING', 'y', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('GCC_PLUGINS', 'y', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('GCC_PLUGIN_RANDSTRUCT', 'y', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('GCC_PLUGIN_STRUCTLEAK', 'y', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('GCC_PLUGIN_STRUCTLEAK_BYREF_ALL', 'y', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('GCC_PLUGIN_LATENT_ENTROPY', 'y', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('IO_STRICT_DEVMEM', 'y', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('REFCOUNT_FULL', 'y', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('DEBUG_LIST', 'y', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('DEBUG_SG', 'y', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('DEBUG_CREDENTIALS', 'y', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('DEBUG_NOTIFIERS', 'y', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('MODULE_SIG_FORCE', 'y', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('HARDENED_USERCOPY_FALLBACK', 'is not set', 'kspp', 'self_protection'), '']) - opt_list.append([Opt('GCC_PLUGIN_STACKLEAK', 'y', 'my', 'self_protection'), '']) - opt_list.append([Opt('SLUB_DEBUG_ON', 'y', 'my', 'self_protection'), '']) - opt_list.append([Opt('SECURITY_DMESG_RESTRICT', 'y', 'my', 'self_protection'), '']) - opt_list.append([Opt('STATIC_USERMODEHELPER', 'y', 'my', 'self_protection'), '']) # breaks systemd? - - opt_list.append([Opt('SECURITY', 'y', 'ubuntu18', 'security_policy'), '']) - opt_list.append([Opt('SECURITY_YAMA', 'y', 'ubuntu18', 'security_policy'), '']) - opt_list.append([Opt('SECURITY_SELINUX_DISABLE', 'is not set', 'ubuntu18', 'security_policy'), '']) - - opt_list.append([Opt('ACPI_CUSTOM_METHOD', 'is not set', 'ubuntu18', 'cut_attack_surface'), '']) - opt_list.append([Opt('COMPAT_BRK', 'is not set', 'ubuntu18', 'cut_attack_surface'), '']) - opt_list.append([Opt('DEVKMEM', 'is not set', 'ubuntu18', 'cut_attack_surface'), '']) - opt_list.append([Opt('COMPAT_VDSO', 'is not set', 'ubuntu18', 'cut_attack_surface'), '']) - - opt_list.append([Opt('LEGACY_VSYSCALL_NONE', 'y', 'kspp', 'cut_attack_surface'), '']) # 'vsyscall=none' - opt_list.append([Opt('BINFMT_MISC', 'is not set', 'kspp', 'cut_attack_surface'), '']) - opt_list.append([Opt('INET_DIAG', 'is not set', 'kspp', 'cut_attack_surface'), '']) - opt_list.append([Opt('KEXEC', 'is not set', 'kspp', 'cut_attack_surface'), '']) - opt_list.append([Opt('PROC_KCORE', 'is not set', 'kspp', 'cut_attack_surface'), '']) - opt_list.append([Opt('LEGACY_PTYS', 'is not set', 'kspp', 'cut_attack_surface'), '']) - opt_list.append([Opt('IA32_EMULATION', 'is not set', 'kspp', 'cut_attack_surface'), '']) - opt_list.append([Opt('X86_X32', 'is not set', 'kspp', 'cut_attack_surface'), '']) - opt_list.append([Opt('MODIFY_LDT_SYSCALL', 'is not set', 'kspp', 'cut_attack_surface'), '']) - opt_list.append([Opt('KEXEC_FILE', 'is not set', 'my', 'cut_attack_surface'), '']) - opt_list.append([Opt('LIVEPATCH', 'is not set', 'my', 'cut_attack_surface'), '']) - opt_list.append([Opt('USER_NS', 'is not set', 'my', 'cut_attack_surface'), '']) # user.max_user_namespaces=0 - opt_list.append([Opt('IP_DCCP', 'is not set', 'my', 'cut_attack_surface'), '']) - opt_list.append([Opt('IP_SCTP', 'is not set', 'my', 'cut_attack_surface'), '']) - opt_list.append([Opt('FTRACE', 'is not set', 'my', 'cut_attack_surface'), '']) - opt_list.append([Opt('KPROBES', 'is not set', 'my', 'cut_attack_surface'), '']) - opt_list.append([Opt('PROFILING', 'is not set', 'my', 'cut_attack_surface'), '']) - opt_list.append([Opt('UPROBES', 'is not set', 'my', 'cut_attack_surface'), '']) - opt_list.append([Opt('BPF_JIT', 'is not set', 'my', 'cut_attack_surface'), '']) - opt_list.append([Opt('BPF_SYSCALL', 'is not set', 'my', 'cut_attack_surface'), '']) - - opt_list.append([Opt('LKDTM', 'm', 'my', 'feature_test'), '']) - - -def print_opt_list(): +checklist = [] + + +class OptCheck: + def __init__(self, name, expected, decision, reason): + self.name = name + self.expected = expected + self.decision = decision + self.reason = reason + self.state = None + self.result = None + + def check(self): + if self.expected == self.state: + self.result = 'OK' + elif self.state is None: + if self.expected == 'is not set': + self.result = 'OK: not found' + else: + self.result = 'FAIL: not found' + 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) + + +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(, ) + + @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('GCC_PLUGINS', 'y', 'kspp', 'self_protection')) + checklist.append(OptCheck('GCC_PLUGIN_RANDSTRUCT', 'y', 'kspp', 'self_protection')) + checklist.append(OptCheck('GCC_PLUGIN_STRUCTLEAK', 'y', 'kspp', 'self_protection')) + checklist.append(OptCheck('GCC_PLUGIN_STRUCTLEAK_BYREF_ALL', 'y', 'kspp', 'self_protection')) + checklist.append(OptCheck('GCC_PLUGIN_LATENT_ENTROPY', 'y', 'kspp', 'self_protection')) + checklist.append(OptCheck('REFCOUNT_FULL', 'y', 'kspp', 'self_protection')) + checklist.append(OptCheck('DEBUG_LIST', 'y', 'kspp', 'self_protection')) + checklist.append(OptCheck('DEBUG_SG', 'y', 'kspp', 'self_protection')) + checklist.append(OptCheck('DEBUG_CREDENTIALS', 'y', 'kspp', 'self_protection')) + checklist.append(OptCheck('DEBUG_NOTIFIERS', 'y', 'kspp', 'self_protection')) + checklist.append(OptCheck('MODULE_SIG_FORCE', 'y', 'kspp', 'self_protection')) + checklist.append(OptCheck('HARDENED_USERCOPY_FALLBACK', 'is not set', 'kspp', 'self_protection')) + + checklist.append(OptCheck('GCC_PLUGIN_STACKLEAK', 'y', 'my', 'self_protection')) + 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('PAGE_POISONING_NO_SANITY', 'is not set', 'my', 'self_protection')) + checklist.append(OptCheck('PAGE_POISONING_ZERO', 'is not set', 'my', 'self_protection')) + + checklist.append(OptCheck('SECURITY', 'y', 'ubuntu18', 'security_policy')) + checklist.append(OptCheck('SECURITY_YAMA', 'y', 'ubuntu18', 'security_policy')) + checklist.append(OptCheck('SECURITY_SELINUX_DISABLE', 'is not set', 'ubuntu18', 'security_policy')) + + checklist.append(OptCheck('SECCOMP', 'y', 'ubuntu18', 'cut_attack_surface')) + checklist.append(OptCheck('SECCOMP_FILTER', '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('COMPAT_VDSO', 'is not set', 'ubuntu18', '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(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('KEXEC', 'is not set', 'kspp', 'cut_attack_surface')) + checklist.append(OptCheck('PROC_KCORE', 'is not set', 'kspp', 'cut_attack_surface')) + checklist.append(OptCheck('LEGACY_PTYS', 'is not set', 'kspp', 'cut_attack_surface')) + checklist.append(OptCheck('IA32_EMULATION', 'is not set', 'kspp', 'cut_attack_surface')) + checklist.append(OptCheck('X86_X32', 'is not set', 'kspp', 'cut_attack_surface')) + checklist.append(OptCheck('MODIFY_LDT_SYSCALL', 'is not set', 'kspp', 'cut_attack_surface')) + checklist.append(OptCheck('HIBERNATION', 'is not set', 'kspp', 'cut_attack_surface')) + + checklist.append(OptCheck('KPROBES', 'is not set', 'grsecurity', 'cut_attack_surface')) + 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('PROC_VMCORE', 'is not set', 'grsecurity', 'cut_attack_surface')) + checklist.append(OptCheck('PROC_PAGE_MONITOR', 'is not set', 'grsecurity', 'cut_attack_surface')) + checklist.append(OptCheck('USELIB', 'is not set', 'grsecurity', 'cut_attack_surface')) + checklist.append(OptCheck('CHECKPOINT_RESTORE', 'is not set', 'grsecurity', 'cut_attack_surface')) + checklist.append(OptCheck('USERFAULTFD', 'is not set', 'grsecurity', 'cut_attack_surface')) + checklist.append(OptCheck('HWPOISON_INJECT', 'is not set', 'grsecurity', 'cut_attack_surface')) + checklist.append(OptCheck('MEM_SOFT_DIRTY', 'is not set', 'grsecurity', 'cut_attack_surface')) + checklist.append(OptCheck('DEVPORT', 'is not set', 'grsecurity', 'cut_attack_surface')) + checklist.append(OptCheck('DEBUG_FS', 'is not set', 'grsecurity', 'cut_attack_surface')) + checklist.append(OptCheck('NOTIFIER_ERROR_INJECTION','is not set', 'grsecurity', 'cut_attack_surface')) + + checklist.append(OptCheck('KEXEC_FILE', 'is not set', 'my', 'cut_attack_surface')) + checklist.append(OptCheck('LIVEPATCH', 'is not set', 'my', 'cut_attack_surface')) + checklist.append(OptCheck('USER_NS', 'is not set', 'my', 'cut_attack_surface')) # user.max_user_namespaces=0 + checklist.append(OptCheck('IP_DCCP', 'is not set', 'my', 'cut_attack_surface')) + checklist.append(OptCheck('IP_SCTP', 'is not set', 'my', 'cut_attack_surface')) + checklist.append(OptCheck('FTRACE', 'is not set', 'my', 'cut_attack_surface')) + checklist.append(OptCheck('PROFILING', 'is not set', 'my', 'cut_attack_surface')) + checklist.append(OptCheck('BPF_JIT', 'is not set', 'my', 'cut_attack_surface')) + checklist.append(OptCheck('BPF_SYSCALL', 'is not set', 'my', 'cut_attack_surface')) + + checklist.append(OptCheck('ARCH_MMAP_RND_BITS', '32', 'my', 'userspace_protection')) + +# checklist.append(OptCheck('LKDTM', 'm', 'my', 'feature_test')) + + +def print_checklist(): print('[+] Printing kernel hardening preferences...') - print(' {:<39}|{:^13}|{:^10}|{:^20}'.format('option name', 'desired val', 'decision', 'reason')) - print(' ======================================================================================') - for o in opt_list: - print(' CONFIG_{:<32}|{:^13}|{:^10}|{:^20}'.format(o[0].name, o[0].state, o[0].decision, o[0].reason)) + 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() def print_check_results(): - global error_count - - print(' {:<39}|{:^13}|{:^10}|{:^20}||{:^20}'.format('option name', 'desired val', 'decision', 'reason', 'check result')) - print(' ===========================================================================================================') - for o in opt_list: - if o[1] == '': - error_count += 1 - o[1] = 'FAIL: not found' - print(' CONFIG_{:<32}|{:^13}|{:^10}|{:^20}||{:^20}'.format(o[0].name, o[0].state, o[0].decision, o[0].reason, o[1])) + 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}||{:^28}'.format( + opt.name, opt.expected, opt.decision, opt.reason, opt.result)) print() -def check_state(option): - global error_count - found = False - - for o in opt_list: - if option[0] == o[0].name: - found = True - - if o[1] != '': - sys.exit('[!] BUG: CONFIG_{} was found more than once'.format(o[0].name)) - - if option[1] == o[0].state: - o[1] = 'OK' - else: - o[1] = 'FAIL: "' + option[1] + '"' - error_count += 1 - - if not found and debug_mode: - print("DEBUG: dunno about option {} ".format(option)) - - -def check_on(line): - if line[:7] != 'CONFIG_': - sys.exit('[!] BUG: bad enabled config option "{}"'.format(line)) +def get_option_state(options, name): + return options.get(name, None) - line_parts = line[7:].split('=') - check_state(line_parts) +def perform_checks(parsed_options): + for opt in checklist: + 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() -def check_off(line): - if line[:9] != '# CONFIG_': - sys.exit('[!] BUG: bad disabled config option "{}"'.format(line)) - line_parts = line[9:].split(' ', 1) +def check_config_file(fname): + with open(fname, 'r') as f: + parsed_options = OrderedDict() + opt_is_on = re.compile("CONFIG_[a-zA-Z0-9_]*=[a-zA-Z0-9_\"]*") + opt_is_off = re.compile("# CONFIG_[a-zA-Z0-9_]* is not set") - if line_parts[1] != 'is not set': - sys.exit('[!] BUG: bad disabled config option "{}"'.format(line)) + print('[+] Checking "{}" against hardening preferences...'.format(fname)) + for line in f.readlines(): + line = line.strip() + option = None + value = None - check_state(line_parts) + if opt_is_on.match(line): + option, value = line[7:].split('=', 1) + elif opt_is_off.match(line): + option, value = line[9:].split(' ', 1) + if value != 'is not set': + sys.exit('[!] ERROR: bad disabled config option "{}"'.format(line)) + if option in parsed_options: + sys.exit('[!] ERROR: config option "{}" exists multiple times'.format(line)) -def check_config_file(fname): - f = open(fname, 'r') + if option is not None: + parsed_options[option] = value - print('[+] Checking "{}" against hardening preferences...'.format(fname)) - for line in f: - opt_is_on = re.compile("CONFIG_[a-zA-Z0-9_]*=[a-zA-Z0-9_\"]*") - opt_is_off = re.compile("# CONFIG_[a-zA-Z0-9_]* is not set") - if opt_is_on.match(line): - check_on(line[:-1]) # drop newline - if opt_is_off.match(line): - check_off(line[:-1]) # ditto + perform_checks(parsed_options) - print_check_results() - f.close() + if debug_mode: + known_options = [opt.name for opt in checklist] + for option, value in parsed_options.items(): + if option not in known_options: + print("DEBUG: dunno about option {} ({})".format(option, value)) + print_check_results() -def usage(name): - print('Usage: {} [-p | -c ] '.format(name)) - print(' -p, --print\n\tprint hardening preferences') - print(' -c , --config=\n\tcheck the config_file against these preferences') - sys.exit(1) +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') + args = parser.parse_args() -def main(argv): - try: - opts, args = getopt.getopt(argv[1:], 'pc:', ['print', 'config=']) - except getopt.GetoptError: - usage(argv[0]) + construct_checklist() - if not opts: - usage(argv[0]) + if args.print: + print_checklist() + sys.exit(0) - construct_opt_list() + if args.debug: + debug_mode = True - for opt, arg in opts: - if opt in ('-p', '--print'): - print_opt_list() - sys.exit() - elif opt in ('-c', '--config'): - check_config_file(arg) - if error_count == 0: - print('[+] config check is PASSED') - else: - sys.exit('[-] config check is NOT PASSED: {} errors'.format(error_count)) + if args.config: + check_config_file(args.config) + error_count = len(list(filter(lambda opt: opt.result.startswith('FAIL'), checklist))) + if error_count == 0: + print('[+] config check is PASSED') + sys.exit(0) + else: + sys.exit('[-] config check is NOT PASSED: {} errors'.format(error_count)) -main(sys.argv) + parser.print_help()