From 75d090b4452a12cd59dae167eb1ab52acd2d4d8e Mon Sep 17 00:00:00 2001 From: Alexander Popov Date: Tue, 17 Oct 2023 19:07:00 +0300 Subject: [PATCH] Add the 'fs.protected_symlinks' check --- kernel_hardening_checker/checks.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel_hardening_checker/checks.py b/kernel_hardening_checker/checks.py index b501049..cb50908 100644 --- a/kernel_hardening_checker/checks.py +++ b/kernel_hardening_checker/checks.py @@ -580,7 +580,6 @@ def normalize_cmdline_options(option, value): # TODO: draft of security hardening sysctls: # what about bpf_jit_enable? # vm.mmap_min_addr has a good value -# fs.protected_symlinks=1 # fs.protected_hardlinks=1 # fs.protected_fifos=2 # fs.protected_regular=2 @@ -615,3 +614,5 @@ def add_sysctl_checks(l, arch): l += [SysctlCheck('cut_attack_surface', 'kspp', 'vm.unprivileged_userfaultfd', '0')] # At first, it disabled unprivileged userfaultfd, # and since v5.11 it enables unprivileged userfaultfd for user-mode only. + + l += [SysctlCheck('harden_userspace', 'kspp', 'fs.protected_symlinks', '1')] -- 2.31.1