X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=kconfig-hardened-check.py;h=975c87446ff764b0059a1bb02c0445cc591b2866;hb=refs%2Ftags%2Fv0.5.3;hp=97cb91357c688f8d374f4835adce693739aee564;hpb=46ad86dcb6422a032f5389464cf2322628c627b7;p=kconfig-hardened-check.git diff --git a/kconfig-hardened-check.py b/kconfig-hardened-check.py index 97cb913..975c874 100755 --- a/kconfig-hardened-check.py +++ b/kconfig-hardened-check.py @@ -14,9 +14,10 @@ # page_poison=1 # slub_debug=FZP # slab_nomerge -# pti=on # kernel.kptr_restrict=1 -# lockdown=1 +# lockdown=1 (is it changed?) +# page_alloc.shuffle=1 +# iommu=force (does it help against DMA attacks?) # # Mitigations of CPU vulnerabilities: # Аrch-independent: @@ -36,8 +37,13 @@ # kptr_restrict=2 # vm.unprivileged_userfaultfd=0 # kernel.perf_event_paranoid=3 -# kernel.yama.ptrace_scope=1 +# kernel.yama.ptrace_scope=1 (or even 3?) # kernel.unprivileged_bpf_disabled=1 +# fs.suid_dumpable=0 +# fs.protected_symlinks = 1 +# fs.protected_hardlinks = 1 +# fs.protected_fifos = 2 +# fs.protected_regular = 2 import sys from argparse import ArgumentParser @@ -180,15 +186,22 @@ def construct_checklist(checklist, arch): 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 - if debug_mode or arch == 'X86_64': - checklist.append(OptCheck('PAGE_TABLE_ISOLATION', 'y', 'defconfig', 'self_protection')) - checklist.append(OptCheck('RANDOMIZE_MEMORY', 'y', 'defconfig', 'self_protection')) if debug_mode or arch == 'X86_64' or arch == 'X86_32': - checklist.append(OptCheck('RANDOMIZE_BASE', 'y', 'defconfig', 'self_protection')) + checklist.append(OptCheck('MICROCODE', 'y', 'defconfig', 'self_protection')) # is needed for mitigating CPU bugs checklist.append(OptCheck('RETPOLINE', '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('X86_UMIP', 'y', 'defconfig', 'self_protection'), \ + OptCheck('X86_INTEL_UMIP', 'y', 'defconfig', 'self_protection'))) + iommu_support_is_set = OptCheck('IOMMU_SUPPORT', 'y', 'defconfig', 'self_protection') # is needed for mitigating DMA attacks + checklist.append(iommu_support_is_set) checklist.append(OptCheck('SYN_COOKIES', 'y', 'defconfig', 'self_protection')) # another reason? + if debug_mode or arch == 'X86_64': + checklist.append(OptCheck('PAGE_TABLE_ISOLATION', 'y', 'defconfig', 'self_protection')) + checklist.append(OptCheck('RANDOMIZE_MEMORY', 'y', 'defconfig', 'self_protection')) + checklist.append(AND(OptCheck('INTEL_IOMMU', 'y', 'defconfig', 'self_protection'), \ + iommu_support_is_set)) + checklist.append(AND(OptCheck('AMD_IOMMU', 'y', 'defconfig', 'self_protection'), \ + iommu_support_is_set)) if debug_mode or arch == 'ARM64': checklist.append(OptCheck('UNMAP_KERNEL_AT_EL0', 'y', 'defconfig', 'self_protection')) checklist.append(OptCheck('HARDEN_EL2_VECTORS', 'y', 'defconfig', 'self_protection')) @@ -196,6 +209,7 @@ def construct_checklist(checklist, arch): if debug_mode or arch == 'X86_64' or arch == 'ARM64': checklist.append(OptCheck('VMAP_STACK', 'y', 'defconfig', 'self_protection')) if debug_mode or arch == 'X86_64' or arch == 'ARM64' or arch == 'X86_32': + checklist.append(OptCheck('RANDOMIZE_BASE', 'y', 'defconfig', 'self_protection')) checklist.append(OptCheck('THREAD_INFO_IN_TASK', 'y', 'defconfig', 'self_protection')) if debug_mode or arch == 'ARM': checklist.append(OptCheck('VMSPLIT_3G', 'y', 'defconfig', 'self_protection')) @@ -241,11 +255,14 @@ def construct_checklist(checklist, arch): checklist.append(OptCheck('X86_PAE', 'y', 'kspp', 'self_protection')) if debug_mode or arch == 'ARM64': checklist.append(OptCheck('ARM64_SW_TTBR0_PAN', 'y', 'kspp', 'self_protection')) - checklist.append(OptCheck('RANDOMIZE_BASE', 'y', 'kspp', 'self_protection')) if debug_mode or arch == 'ARM64' or arch == 'ARM': checklist.append(OptCheck('SYN_COOKIES', 'y', 'kspp', 'self_protection')) # another reason? checklist.append(OptCheck('DEFAULT_MMAP_MIN_ADDR', '32768', 'kspp', 'self_protection')) + checklist.append(OR(OptCheck('INIT_STACK_ALL', 'y', 'clipos', 'self_protection'), \ + OptCheck('GCC_PLUGIN_STRUCTLEAK_BYREF_ALL', 'y', 'kspp', 'self_protection'))) + checklist.append(OptCheck('INIT_ON_ALLOC_DEFAULT_ON', 'y', 'clipos', 'self_protection')) + checklist.append(OptCheck('INIT_ON_FREE_DEFAULT_ON', 'y', 'clipos', 'self_protection')) checklist.append(OptCheck('SECURITY_DMESG_RESTRICT', 'y', 'clipos', 'self_protection')) checklist.append(OptCheck('DEBUG_VIRTUAL', 'y', 'clipos', 'self_protection')) checklist.append(OptCheck('STATIC_USERMODEHELPER', 'y', 'clipos', 'self_protection')) # needs userspace support (systemd) @@ -261,29 +278,18 @@ def construct_checklist(checklist, arch): stackleak_is_set)) if debug_mode or arch == 'X86_64' or arch == 'X86_32': checklist.append(OptCheck('RANDOM_TRUST_CPU', 'is not set', 'clipos', 'self_protection')) - checklist.append(OptCheck('MICROCODE', 'y', 'clipos', 'self_protection')) # is needed for mitigating CPU bugs - iommu_support_is_set = OptCheck('IOMMU_SUPPORT', 'y', 'clipos', 'self_protection') # is needed for mitigating DMA attacks - checklist.append(iommu_support_is_set) - checklist.append(AND(OptCheck('INTEL_IOMMU', 'y', 'clipos', 'self_protection'), \ - iommu_support_is_set)) checklist.append(AND(OptCheck('INTEL_IOMMU_SVM', 'y', 'clipos', 'self_protection'), \ iommu_support_is_set)) checklist.append(AND(OptCheck('INTEL_IOMMU_DEFAULT_ON', 'y', 'clipos', 'self_protection'), \ iommu_support_is_set)) - checklist.append(OR(OptCheck('INIT_STACK_ALL', 'y', 'my', 'self_protection'), \ - OptCheck('GCC_PLUGIN_STRUCTLEAK_BYREF_ALL', 'y', 'kspp', 'self_protection'))) checklist.append(OptCheck('SLUB_DEBUG_ON', 'y', 'my', 'self_protection')) - checklist.append(OptCheck('INIT_ON_ALLOC_DEFAULT_ON', 'y', 'my', 'self_protection')) - checklist.append(OptCheck('INIT_ON_FREE_DEFAULT_ON', 'y', 'my', 'self_protection')) checklist.append(OptCheck('RESET_ATTACK_MITIGATION', 'y', 'my', 'self_protection')) # needs userspace support (systemd) checklist.append(AND(OptCheck('PAGE_POISONING_NO_SANITY', 'is not set', 'my', 'self_protection'), \ page_poisoning_is_set)) checklist.append(AND(OptCheck('PAGE_POISONING_ZERO', 'is not set', 'my', 'self_protection'), \ page_poisoning_is_set)) if debug_mode or arch == 'X86_64': - checklist.append(AND(OptCheck('AMD_IOMMU', 'y', 'my', 'self_protection'), \ - iommu_support_is_set)) checklist.append(AND(OptCheck('AMD_IOMMU_V2', 'y', 'my', 'self_protection'), \ iommu_support_is_set)) if debug_mode or arch == 'X86_32': @@ -358,7 +364,7 @@ def construct_checklist(checklist, arch): checklist.append(OptCheck('MMIOTRACE_TEST', 'is not set', 'lockdown', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL checklist.append(OptCheck('KSM', 'is not set', 'clipos', 'cut_attack_surface')) # to prevent FLUSH+RELOAD attack - checklist.append(OptCheck('IKCONFIG', 'is not set', 'clipos', 'cut_attack_surface')) +# checklist.append(OptCheck('IKCONFIG', 'is not set', 'clipos', 'cut_attack_surface')) # no, this info is needed for this check :) checklist.append(OptCheck('KALLSYMS', 'is not set', 'clipos', 'cut_attack_surface')) checklist.append(OptCheck('X86_VSYSCALL_EMULATION', 'is not set', 'clipos', 'cut_attack_surface')) checklist.append(OptCheck('MAGIC_SYSRQ', 'is not set', 'clipos', 'cut_attack_surface')) @@ -397,8 +403,8 @@ def print_checklist(checklist, with_results): return # header - print('{:^40}|{:^13}|{:^10}|{:^20}'.format('option name', 'desired val', 'decision', 'reason'), end='') - sep_line_len = 86 + print('{:^45}|{:^13}|{:^10}|{:^20}'.format('option name', 'desired val', 'decision', 'reason'), end='') + sep_line_len = 91 if with_results: print('||{:^28}'.format('check result'), end='') sep_line_len += 30 @@ -407,7 +413,7 @@ def print_checklist(checklist, with_results): print('=' * sep_line_len) for opt in checklist: - print('CONFIG_{:<33}|{:^13}|{:^10}|{:^20}'.format(opt.name, opt.expected, opt.decision, opt.reason), end='') + print('CONFIG_{:<38}|{:^13}|{:^10}|{:^20}'.format(opt.name, opt.expected, opt.decision, opt.reason), end='') if with_results: print('||{:^28}'.format(opt.result), end='') print()