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Check the kernel.kexec_load_disabled sysctl
[kconfig-hardened-check.git]
/
kconfig_hardened_check
/
checks.py
diff --git
a/kconfig_hardened_check/checks.py
b/kconfig_hardened_check/checks.py
index e30746c9fc0c3af0f4a60ef75a8f8d73b486e7d1..bffc68c774e88ed255768ec9f7e28fb70267be8f 100644
(file)
--- a/
kconfig_hardened_check/checks.py
+++ b/
kconfig_hardened_check/checks.py
@@
-577,8
+577,6
@@
def normalize_cmdline_options(option, value):
def add_sysctl_checks(l, arch):
# TODO: draft of security hardening sysctls:
# kernel.kptr_restrict=2 (or 1?)
def add_sysctl_checks(l, arch):
# TODO: draft of security hardening sysctls:
# kernel.kptr_restrict=2 (or 1?)
-# kernel.perf_event_paranoid=2 (or 3 with a custom patch, see https://lwn.net/Articles/696216/)
-# kernel.kexec_load_disabled=1
# kernel.yama.ptrace_scope=3
# user.max_user_namespaces=0 (for Debian, also see kernel.unprivileged_userns_clone)
# what about bpf_jit_enable?
# kernel.yama.ptrace_scope=3
# user.max_user_namespaces=0 (for Debian, also see kernel.unprivileged_userns_clone)
# what about bpf_jit_enable?
@@
-610,3
+608,5
@@
def add_sysctl_checks(l, arch):
l += [SysctlCheck('self_protection', 'kspp', 'net.core.bpf_jit_harden', '2')]
l += [SysctlCheck('cut_attack_surface', 'kspp', 'kernel.dmesg_restrict', '1')]
l += [SysctlCheck('self_protection', 'kspp', 'net.core.bpf_jit_harden', '2')]
l += [SysctlCheck('cut_attack_surface', 'kspp', 'kernel.dmesg_restrict', '1')]
+ l += [SysctlCheck('cut_attack_surface', 'kspp', 'kernel.perf_event_paranoid', '3')] # with a custom patch, see https://lwn.net/Articles/696216/
+ l += [SysctlCheck('cut_attack_surface', 'kspp', 'kernel.kexec_load_disabled', '1')]