#
#
# N.B Hardening command line parameters:
-# 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?)
+# page_poison=1 (if enabled)
#
# Mitigations of CPU vulnerabilities:
# Аrch-independent:
# l1tf=full,force
# mds=full,nosmt
# ARM64:
-# ? CONFIG_HARDEN_BRANCH_PREDICTOR
# kpti=on
# ssbd=force-on
#
-# N.B. Hardening sysctl's:
-# net.core.bpf_jit_harden
+# N.B. Hardening sysctls:
+# net.core.bpf_jit_harden=2
# kptr_restrict=2
+# vm.unprivileged_userfaultfd=0
+# kernel.perf_event_paranoid=3
+# 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
from collections import OrderedDict
import re
+import json
debug_mode = False # set it to True to print the unknown options from the config
json_mode = False # if True, print results in JSON format
def construct_checklist(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
+ 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(OR(OptCheck('STRICT_KERNEL_RWX', 'y', 'defconfig', 'self_protection'), \
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'))
+ checklist.append(OptCheck('RODATA_FULL_DEFAULT_ENABLED', 'y', 'defconfig', 'self_protection'))
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'))
checklist.append(OptCheck('CPU_SW_DOMAIN_PAN', 'y', 'defconfig', 'self_protection'))
if debug_mode or arch == 'ARM64' or arch == 'ARM':
checklist.append(OptCheck('REFCOUNT_FULL', 'y', 'defconfig', 'self_protection'))
+ checklist.append(OptCheck('HARDEN_BRANCH_PREDICTOR', 'y', 'defconfig', 'self_protection'))
checklist.append(OptCheck('BUG_ON_DATA_CORRUPTION', 'y', 'kspp', 'self_protection'))
checklist.append(OptCheck('DEBUG_WX', 'y', 'kspp', 'self_protection'))
checklist.append(OptCheck('SCHED_STACK_END_CHECK', 'y', 'kspp', 'self_protection'))
checklist.append(OptCheck('SLAB_FREELIST_HARDENED', 'y', 'kspp', 'self_protection'))
checklist.append(OptCheck('SLAB_FREELIST_RANDOM', 'y', 'kspp', 'self_protection'))
+ checklist.append(OptCheck('SHUFFLE_PAGE_ALLOCATOR', 'y', 'kspp', 'self_protection'))
checklist.append(OptCheck('FORTIFY_SOURCE', 'y', 'kspp', 'self_protection'))
checklist.append(OptCheck('GCC_PLUGINS', 'y', 'kspp', 'self_protection'))
randstruct_is_set = OptCheck('GCC_PLUGIN_RANDSTRUCT', 'y', 'kspp', 'self_protection')
checklist.append(randstruct_is_set)
- 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('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'))
- page_poisoning_is_set = OptCheck('PAGE_POISONING', 'y', 'kspp', 'self_protection')
- checklist.append(page_poisoning_is_set)
hardened_usercopy_is_set = OptCheck('HARDENED_USERCOPY', 'y', 'kspp', 'self_protection')
checklist.append(hardened_usercopy_is_set)
checklist.append(AND(OptCheck('HARDENED_USERCOPY_FALLBACK', 'is not set', 'kspp', 'self_protection'), \
checklist.append(OR(OptCheck('MODULE_SIG_FORCE', 'y', 'kspp', 'self_protection'), \
modules_not_set)) # refers to LOCK_DOWN_KERNEL
if debug_mode or arch == 'X86_64' or arch == 'X86_32':
- checklist.append(OptCheck('DEFAULT_MMAP_MIN_ADDR', '65536', 'kspp', 'self_protection'))
- checklist.append(OptCheck('REFCOUNT_FULL', 'y', 'kspp', 'self_protection'))
+ checklist.append(OptCheck('DEFAULT_MMAP_MIN_ADDR', '65536', 'kspp', 'self_protection'))
+ checklist.append(OptCheck('REFCOUNT_FULL', 'y', 'kspp', 'self_protection'))
if debug_mode or arch == 'X86_32':
- checklist.append(OptCheck('HIGHMEM64G', 'y', 'kspp', 'self_protection'))
- checklist.append(OptCheck('X86_PAE', 'y', 'kspp', 'self_protection'))
+ checklist.append(OptCheck('HIGHMEM64G', 'y', 'kspp', 'self_protection'))
+ 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'))
+ checklist.append(OptCheck('ARM64_SW_TTBR0_PAN', '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(OptCheck('LOCK_DOWN_KERNEL', 'y', 'clipos', 'self_protection')) # remember about LOCK_DOWN_MANDATORY
- 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)
+ 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(OR(OptCheck('INIT_ON_FREE_DEFAULT_ON', 'y', 'clipos', 'self_protection'), \
+ OptCheck('PAGE_POISONING', 'y', 'kspp', '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)
checklist.append(OptCheck('SLAB_MERGE_DEFAULT', 'is not set', 'clipos', 'self_protection')) # slab_nomerge
checklist.append(AND(OptCheck('GCC_PLUGIN_RANDSTRUCT_PERFORMANCE', 'is not set', 'clipos', 'self_protection'), \
randstruct_is_set))
if debug_mode or arch == 'X86_64' or arch == 'ARM64' or arch == 'X86_32':
- stackleak_is_set = OptCheck('GCC_PLUGIN_STACKLEAK', 'y', 'clipos', 'self_protection')
+ stackleak_is_set = OptCheck('GCC_PLUGIN_STACKLEAK', 'y', 'clipos', 'self_protection')
checklist.append(stackleak_is_set)
- checklist.append(AND(OptCheck('STACKLEAK_METRICS', 'is not set', 'clipos', 'self_protection'), \
+ checklist.append(AND(OptCheck('STACKLEAK_METRICS', 'is not set', 'clipos', 'self_protection'), \
stackleak_is_set))
- checklist.append(AND(OptCheck('STACKLEAK_RUNTIME_DISABLE','is not set', 'clipos', 'self_protection'), \
+ checklist.append(AND(OptCheck('STACKLEAK_RUNTIME_DISABLE', 'is not set', 'clipos', 'self_protection'), \
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'), \
+ checklist.append(OptCheck('RANDOM_TRUST_CPU', 'is not set', 'clipos', 'self_protection'))
+ checklist.append(AND(OptCheck('INTEL_IOMMU_SVM', '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'), \
+ checklist.append(AND(OptCheck('INTEL_IOMMU_DEFAULT_ON', 'y', 'clipos', 'self_protection'), \
iommu_support_is_set))
+ checklist.append(OptCheck('SLUB_DEBUG_ON', 'y', 'my', 'self_protection'))
+ checklist.append(OptCheck('RESET_ATTACK_MITIGATION', 'y', 'my', 'self_protection')) # needs userspace support (systemd)
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'), \
+ checklist.append(AND(OptCheck('AMD_IOMMU_V2', 'y', 'my', 'self_protection'), \
iommu_support_is_set))
- checklist.append(OptCheck('SLUB_DEBUG_ON', 'y', 'my', 'self_protection'))
- checklist.append(OptCheck('SECURITY_LOADPIN', 'y', 'my', 'self_protection')) # needs userspace support
- 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_32':
- checklist.append(OptCheck('PAGE_TABLE_ISOLATION', 'y', 'my', 'self_protection'))
+ checklist.append(OptCheck('PAGE_TABLE_ISOLATION', 'y', 'my', 'self_protection'))
if debug_mode or arch == 'ARM':
- checklist.append(OptCheck('STACKPROTECTOR_PER_TASK', 'y', 'my', 'self_protection'))
+ checklist.append(OptCheck('STACKPROTECTOR_PER_TASK', 'y', 'my', 'self_protection'))
if debug_mode or arch == 'X86_64' or arch == 'ARM64' or arch == 'X86_32':
- checklist.append(OptCheck('SECURITY', 'y', 'defconfig', 'security_policy')) # and choose your favourite LSM
+ checklist.append(OptCheck('SECURITY', 'y', 'defconfig', 'security_policy')) # and choose your favourite LSM
if debug_mode or arch == 'ARM':
- checklist.append(OptCheck('SECURITY', 'y', 'kspp', 'security_policy')) # and choose your favourite LSM
- checklist.append(OptCheck('SECURITY_YAMA', 'y', 'kspp', 'security_policy'))
+ checklist.append(OptCheck('SECURITY', 'y', 'kspp', 'security_policy')) # and choose your favourite LSM
+ checklist.append(OptCheck('SECURITY_WRITABLE_HOOKS', 'is not set', 'defconfig', 'security_policy'))
+ checklist.append(OptCheck('SECURITY_YAMA', 'y', 'kspp', 'security_policy'))
+ checklist.append(OptCheck('SECURITY_LOADPIN', 'y', 'my', 'security_policy')) # needs userspace support
+ checklist.append(OptCheck('SECURITY_LOCKDOWN_LSM', 'y', 'my', 'security_policy'))
+ checklist.append(OptCheck('SECURITY_LOCKDOWN_LSM_EARLY', 'y', 'my', 'security_policy'))
+ checklist.append(OptCheck('LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY', 'y', 'my', 'security_policy'))
+ checklist.append(OptCheck('SECURITY_SAFESETID', 'y', 'my', 'security_policy'))
checklist.append(OptCheck('SECCOMP', 'y', 'defconfig', 'cut_attack_surface'))
checklist.append(OptCheck('SECCOMP_FILTER', 'y', 'defconfig', 'cut_attack_surface'))
checklist.append(OR(OptCheck('IO_STRICT_DEVMEM', 'y', 'kspp', 'cut_attack_surface'), \
devmem_not_set)) # refers to LOCK_DOWN_KERNEL
if debug_mode or arch == 'ARM':
- checklist.append(OR(OptCheck('STRICT_DEVMEM', 'y', 'kspp', 'cut_attack_surface'), \
+ checklist.append(OR(OptCheck('STRICT_DEVMEM', 'y', 'kspp', 'cut_attack_surface'), \
devmem_not_set)) # refers to LOCK_DOWN_KERNEL
checklist.append(OptCheck('ACPI_CUSTOM_METHOD', 'is not set', 'kspp', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL
checklist.append(OptCheck('COMPAT_BRK', 'is not set', 'kspp', 'cut_attack_surface'))
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'))
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('BPF_JIT', 'is not set', 'my', 'cut_attack_surface'))
+ checklist.append(OptCheck('VIDEO_VIVID', 'is not set', 'my', 'cut_attack_surface'))
if debug_mode or arch == 'X86_32':
- checklist.append(OptCheck('MODIFY_LDT_SYSCALL', 'is not set', 'my', 'cut_attack_surface'))
+ checklist.append(OptCheck('MODIFY_LDT_SYSCALL', 'is not set', 'my', 'cut_attack_surface'))
if debug_mode or arch == 'ARM64':
- checklist.append(OptCheck('ARM64_PTR_AUTH', 'y', 'defconfig', 'userspace_protection'))
+ checklist.append(OptCheck('ARM64_PTR_AUTH', 'y', 'defconfig', 'userspace_hardening'))
if debug_mode or arch == 'X86_64' or arch == 'ARM64':
- checklist.append(OptCheck('ARCH_MMAP_RND_BITS', '32', 'clipos', 'userspace_protection'))
+ checklist.append(OptCheck('ARCH_MMAP_RND_BITS', '32', 'clipos', 'userspace_hardening'))
if debug_mode or arch == 'X86_32' or arch == 'ARM':
- checklist.append(OptCheck('ARCH_MMAP_RND_BITS', '16', 'my', 'userspace_protection'))
+ checklist.append(OptCheck('ARCH_MMAP_RND_BITS', '16', 'my', 'userspace_hardening'))
# checklist.append(OptCheck('LKDTM', 'm', 'my', 'feature_test'))
if with_results:
opt.append(o.result)
opts.append(opt)
- print(opts)
+ print(json.dumps(opts))
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='')
+ print('| {}'.format('check result'), end='')
sep_line_len += 30
print()
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('| {}'.format(opt.result), end='')
print()
print()
projects / kconfig-hardened-check.git / blobdiff