# N.B Hardening command line parameters:
# slub_debug=FZP
# slab_nomerge
-# kernel.kptr_restrict=1
# page_alloc.shuffle=1
# iommu=force (does it help against DMA attacks?)
# page_poison=1 (if enabled)
# spec_store_bypass_disable=on
# l1tf=full,force
# mds=full,nosmt
+# tsx=off
# ARM64:
# kpti=on
# ssbd=force-on
#
# N.B. Hardening sysctls:
-# net.core.bpf_jit_harden=2
-# kptr_restrict=2
-# vm.unprivileged_userfaultfd=0
+# kernel.kptr_restrict=2
+# kernel.dmesg_restrict=1
# kernel.perf_event_paranoid=3
-# kernel.yama.ptrace_scope=1 (or even 3?)
+# kernel.kexec_load_disabled=1
+# kernel.yama.ptrace_scope=3
+# user.max_user_namespaces=0
# kernel.unprivileged_bpf_disabled=1
+# net.core.bpf_jit_harden=2
+#
+# vm.unprivileged_userfaultfd=0
+#
+# dev.tty.ldisc_autoload=0
+# fs.protected_symlinks=1
+# fs.protected_hardlinks=1
+# fs.protected_fifos=2
+# fs.protected_regular=2
# fs.suid_dumpable=0
-# fs.protected_symlinks = 1
-# fs.protected_hardlinks = 1
-# fs.protected_fifos = 2
-# fs.protected_regular = 2
+# kernel.modules_disabled=1
import sys
from argparse import ArgumentParser
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
+ devmem_not_set = OptCheck('DEVMEM', 'is not set', 'kspp', 'cut_attack_surface') # refers to LOCKDOWN
checklist.append(OptCheck('BUG', 'y', 'defconfig', 'self_protection'))
checklist.append(OR(OptCheck('STRICT_KERNEL_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('GCC_PLUGINS', 'y', 'defconfig', 'self_protection'))
- checklist.append(OR(OptCheck('REFCOUNT_FULL', 'y', 'defconfig', 'self_protection'), \
+ checklist.append(OR(OptCheck('REFCOUNT_FULL', 'y', 'defconfig', 'self_protection'), \
VerCheck((5, 5)))) # REFCOUNT_FULL is enabled by default since v5.5
+ iommu_support_is_set = OptCheck('IOMMU_SUPPORT', 'y', 'defconfig', 'self_protection') # is needed for mitigating DMA attacks
+ checklist.append(iommu_support_is_set)
if arch == 'X86_64' or arch == 'X86_32':
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(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 arch == 'X86_64':
checklist.append(OptCheck('PAGE_TABLE_ISOLATION', 'y', 'defconfig', 'self_protection'))
checklist.append(OptCheck('RANDOMIZE_BASE', 'y', 'defconfig', 'self_protection'))
checklist.append(OptCheck('THREAD_INFO_IN_TASK', 'y', 'defconfig', 'self_protection'))
if arch == 'ARM':
- checklist.append(OptCheck('VMSPLIT_3G', 'y', 'defconfig', 'self_protection'))
checklist.append(OptCheck('CPU_SW_DOMAIN_PAN', 'y', 'defconfig', 'self_protection'))
checklist.append(OptCheck('STACKPROTECTOR_PER_TASK', 'y', 'defconfig', 'self_protection'))
if arch == 'ARM64' or arch == 'ARM':
checklist.append(OR(OptCheck('MODULE_SIG_SHA512', 'y', 'kspp', 'self_protection'), \
modules_not_set))
checklist.append(OR(OptCheck('MODULE_SIG_FORCE', 'y', 'kspp', 'self_protection'), \
- modules_not_set)) # refers to LOCK_DOWN_KERNEL
+ modules_not_set)) # refers to LOCKDOWN
checklist.append(OR(OptCheck('INIT_STACK_ALL', 'y', 'kspp', 'self_protection'), \
OptCheck('GCC_PLUGIN_STRUCTLEAK_BYREF_ALL', 'y', 'kspp', 'self_protection')))
checklist.append(OptCheck('INIT_ON_ALLOC_DEFAULT_ON', 'y', 'kspp', 'self_protection'))
if arch == 'X86_64' or arch == 'X86_32':
checklist.append(OptCheck('DEFAULT_MMAP_MIN_ADDR', '65536', 'kspp', 'self_protection'))
if arch == 'X86_32':
+ checklist.append(OptCheck('PAGE_TABLE_ISOLATION', 'y', 'kspp', 'self_protection'))
checklist.append(OptCheck('HIGHMEM64G', 'y', 'kspp', 'self_protection'))
checklist.append(OptCheck('X86_PAE', 'y', 'kspp', 'self_protection'))
if arch == 'ARM64':
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))
- checklist.append(OptCheck('CONFIG_RANDOM_TRUST_BOOTLOADER', 'is not set', 'clipos', 'self_protection'))
+ checklist.append(OptCheck('RANDOM_TRUST_BOOTLOADER', 'is not set', 'clipos', 'self_protection'))
checklist.append(OptCheck('RANDOM_TRUST_CPU', 'is not set', 'clipos', 'self_protection'))
if arch == 'X86_64' or arch == 'X86_32':
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))
+ if arch == 'X86_32':
+ checklist.append(AND(OptCheck('INTEL_IOMMU', '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 arch == 'X86_64':
checklist.append(AND(OptCheck('AMD_IOMMU_V2', 'y', 'my', 'self_protection'), \
iommu_support_is_set))
- if arch == 'X86_32':
- checklist.append(OptCheck('PAGE_TABLE_ISOLATION', 'y', 'my', 'self_protection'))
if arch == 'X86_64' or arch == 'ARM64' or arch == 'X86_32':
checklist.append(OptCheck('SECURITY', 'y', 'defconfig', 'security_policy')) # and choose your favourite LSM
if 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(OR(OptCheck('SECURITY_WRITABLE_HOOKS', 'is not set', 'my', 'security_policy'), \
+ OptCheck('SECURITY_SELINUX_DISABLE', 'is not set', 'kspp', 'security_policy')))
checklist.append(OptCheck('SECURITY_LOCKDOWN_LSM', 'y', 'clipos', 'security_policy'))
checklist.append(OptCheck('SECURITY_LOCKDOWN_LSM_EARLY', 'y', 'clipos', 'security_policy'))
checklist.append(OptCheck('LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY', 'y', 'clipos', 'security_policy'))
checklist.append(AND(OptCheck('SECURITY_LOADPIN_ENFORCE', 'y', 'my', 'security_policy'), \
loadpin_is_set))
checklist.append(OptCheck('SECURITY_SAFESETID', 'y', 'my', 'security_policy'))
- checklist.append(OptCheck('SECURITY_WRITABLE_HOOKS', 'is not set', 'my', 'security_policy'))
checklist.append(OptCheck('SECCOMP', 'y', 'defconfig', 'cut_attack_surface'))
checklist.append(OptCheck('SECCOMP_FILTER', 'y', 'defconfig', 'cut_attack_surface'))
if arch == 'X86_64' or arch == 'ARM64' or arch == 'X86_32':
checklist.append(OR(OptCheck('STRICT_DEVMEM', 'y', 'defconfig', 'cut_attack_surface'), \
- devmem_not_set)) # refers to LOCK_DOWN_KERNEL
+ devmem_not_set)) # refers to LOCKDOWN
checklist.append(modules_not_set)
checklist.append(devmem_not_set)
checklist.append(OR(OptCheck('IO_STRICT_DEVMEM', 'y', 'kspp', 'cut_attack_surface'), \
- devmem_not_set)) # refers to LOCK_DOWN_KERNEL
+ devmem_not_set)) # refers to LOCKDOWN
if arch == 'ARM':
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
+ devmem_not_set)) # refers to LOCKDOWN
if arch == 'X86_64':
checklist.append(OptCheck('LEGACY_VSYSCALL_NONE', 'y', 'kspp', 'cut_attack_surface')) # 'vsyscall=none'
+ checklist.append(OptCheck('ACPI_CUSTOM_METHOD', 'is not set', 'kspp', 'cut_attack_surface')) # refers to LOCKDOWN
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('DEVKMEM', 'is not set', 'kspp', 'cut_attack_surface')) # refers to LOCKDOWN
checklist.append(OptCheck('COMPAT_VDSO', 'is not set', 'kspp', 'cut_attack_surface'))
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('PROC_KCORE', 'is not set', 'kspp', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL
+ checklist.append(OptCheck('KEXEC', 'is not set', 'kspp', 'cut_attack_surface')) # refers to LOCKDOWN
+ checklist.append(OptCheck('PROC_KCORE', 'is not set', 'kspp', 'cut_attack_surface')) # refers to LOCKDOWN
checklist.append(OptCheck('LEGACY_PTYS', '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('HIBERNATION', 'is not set', 'kspp', 'cut_attack_surface')) # refers to LOCKDOWN
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('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('KPROBES', 'is not set', 'grsecurity', 'cut_attack_surface')) # refers to LOCKDOWN
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('GENERIC_TRACER', 'is not set', 'grsecurity', 'cut_attack_surface')) # refers to LOCKDOWN
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('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')) # refers to LOCK_DOWN_KERNEL
- checklist.append(OptCheck('DEBUG_FS', 'is not set', 'grsecurity', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL
+ checklist.append(OptCheck('DEVPORT', 'is not set', 'grsecurity', 'cut_attack_surface')) # refers to LOCKDOWN
+ checklist.append(OptCheck('DEBUG_FS', 'is not set', 'grsecurity', 'cut_attack_surface')) # refers to LOCKDOWN
checklist.append(OptCheck('NOTIFIER_ERROR_INJECTION','is not set', 'grsecurity', 'cut_attack_surface'))
- checklist.append(OptCheck('ACPI_TABLE_UPGRADE', 'is not set', 'lockdown', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL
- 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('ACPI_TABLE_UPGRADE', 'is not set', 'lockdown', 'cut_attack_surface')) # refers to LOCKDOWN
+ checklist.append(OptCheck('X86_IOPL_IOPERM', 'is not set', 'lockdown', 'cut_attack_surface')) # refers to LOCKDOWN
+ checklist.append(OptCheck('EFI_TEST', 'is not set', 'lockdown', 'cut_attack_surface')) # refers to LOCKDOWN
+ checklist.append(OptCheck('BPF_SYSCALL', 'is not set', 'lockdown', 'cut_attack_surface')) # refers to LOCKDOWN
+ checklist.append(OptCheck('MMIOTRACE_TEST', 'is not set', 'lockdown', 'cut_attack_surface')) # refers to LOCKDOWN
+ if arch == 'X86_64' or arch == 'X86_32':
+ checklist.append(OptCheck('X86_INTEL_TSX_MODE_OFF', 'y', 'clipos', 'cut_attack_surface')) # tsx=off
checklist.append(OptCheck('STAGING', 'is not set', 'clipos', 'cut_attack_surface'))
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')) # 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('KEXEC_FILE', 'is not set', 'clipos', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL (permissive)
+ checklist.append(OptCheck('KEXEC_FILE', 'is not set', 'clipos', 'cut_attack_surface')) # refers to LOCKDOWN (permissive)
checklist.append(OptCheck('USER_NS', 'is not set', 'clipos', 'cut_attack_surface')) # user.max_user_namespaces=0
+ checklist.append(OptCheck('X86_MSR', 'is not set', 'clipos', 'cut_attack_surface')) # refers to LOCKDOWN
+ checklist.append(OptCheck('X86_CPUID', 'is not set', 'clipos', 'cut_attack_surface'))
checklist.append(AND(OptCheck('LDISC_AUTOLOAD', 'is not set', 'clipos', 'cut_attack_surface'), \
VerCheck((5, 1)))) # LDISC_AUTOLOAD can be disabled since v5.1
- checklist.append(OptCheck('MMIOTRACE', 'is not set', 'my', 'cut_attack_surface')) # refers to LOCK_DOWN_KERNEL (permissive)
+ checklist.append(OptCheck('AIO', 'is not set', 'grapheneos', 'cut_attack_surface'))
+
+ checklist.append(OptCheck('MMIOTRACE', 'is not set', 'my', 'cut_attack_surface')) # refers to LOCKDOWN (permissive)
checklist.append(OptCheck('LIVEPATCH', 'is not set', 'my', 'cut_attack_surface'))
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('FTRACE', 'is not set', 'my', 'cut_attack_surface')) # refers to LOCKDOWN
checklist.append(OptCheck('BPF_JIT', 'is not set', 'my', 'cut_attack_surface'))
checklist.append(OptCheck('VIDEO_VIVID', 'is not set', 'my', 'cut_attack_surface'))
checklist.append(OptCheck('INTEGRITY', 'y', 'defconfig', 'userspace_hardening'))
if arch == 'ARM64':
checklist.append(OptCheck('ARM64_PTR_AUTH', 'y', 'defconfig', 'userspace_hardening'))
+ if arch == 'ARM' or arch == 'X86_32':
+ checklist.append(OptCheck('VMSPLIT_3G', 'y', 'defconfig', 'userspace_hardening'))
if arch == 'X86_64' or arch == 'ARM64':
checklist.append(OptCheck('ARCH_MMAP_RND_BITS', '32', 'clipos', 'userspace_hardening'))
if arch == 'X86_32' or arch == 'ARM':
projects / kconfig-hardened-check.git / blobdiff