Ensure events that modify the system's Mandatory Access Controls are collected

RendahLevel 2Otomatislinux

Deskripsi

Monitor SELinux mandatory access controls. The parameters below monitor any write access (potential additional, deletion or modification of files in the directory) or attribute changes to the /etc/selinux/ and /usr/share/selinux/ directories. Note: • If a different Mandatory Access Control method is used, changes to the corresponding directories should be audited. • Reloading the auditd config to set active settings requires the auditd service to be restarted, and may require a system reboot.

Cara pemeriksaan

Metode audit: Perintah shell

shell

alt0() { command -v grep >/dev/null 2>&1 || { echo "step1: grep not installed"; return 1; }; o=$(bash -c 'grep MAC-policy /etc/audit/rules.d/*.rules' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '/etc/audit/rules.d/MAC_policy.rules:-w /etc/selinux/ -p wa -k MAC-policy' || { echo step1: missing '/etc/audit/rules.d/MAC_policy.rules:-w /etc/selinux/ -p wa -'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '/etc/audit/rules.d/MAC_policy.rules:-w /usr/share/selinux/ -p wa -k MAC-policy' || { echo step1: missing '/etc/audit/rules.d/MAC_policy.rules:-w /usr/share/selinux/ -'; return 1; }; command -v auditctl >/dev/null 2>&1 || { echo "step2: auditctl not installed"; return 1; }; command -v grep >/dev/null 2>&1 || { echo "step2: grep not installed"; return 1; }; o=$(bash -c 'auditctl -l | grep MAC-policy' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /etc/selinux/ -p wa -k MAC-policy' || { echo step2: missing '-w /etc/selinux/ -p wa -k MAC-policy'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /usr/share/selinux/ -p wa -k MAC-policy' || { echo step2: missing '-w /usr/share/selinux/ -p wa -k MAC-policy'; return 1; }; }; if alt0; then echo compliant; fi

Output yang diharapkan: compliant

Cara perbaikan

Metode perbaikan: Panduan atau patch infrastruktur

Edit or create a file in the /etc/audit/rules.d/ directory ending in .rules Example: vi /etc/audit/rules.d/MAC_policy.rules and add the following lines: -w /etc/selinux/ -p wa -k MAC-policy -w /usr/share/selinux/ -p wa -k MAC-policy

Properti

Sistem operasi: sles-12
Tag: cis-convertedlinux
Referensi: CIS SUSE Linux Enterprise 12 Benchmark v3.2.0 - 4.1.6

Periksa host ini

Jalankan ini pada mesin yang diizinkan untuk Anda audit. Pemindaian bersifat hanya baca.

shell

tmaegis scan --target linux --level 2