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

낮음레벨 2자동linux

설명

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.

점검 방법

감사 방식: 셸 명령

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

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

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

속성

운영 체제: sles-12
태그: cis-convertedlinux
참고 자료: CIS SUSE Linux Enterprise 12 Benchmark v3.2.0 - 4.1.6

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shell

tmaegis scan --target linux --level 2