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

낮음레벨 2자동linux

설명

Monitor AppArmor, an implementation of 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/apparmor/ and /usr/share/apparmor/ directories. Note: If a different Mandatory Access Control method is used, changes to the corresponding directories should be audited.

점검 방법

감사 방식: 셸 명령

shell

alt0() { o=$(bash -c 'awk '"'"'/^ *-w/ &&(/\/etc\/apparmor/ ||/\/usr\/share\/apparmor/) &&/ +-p *wa/ &&(/ key= *[!-~]* *$/||/ -k *[!-~]* *$/)'"'"' /etc/audit/rules.d/*.rules' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /etc/apparmor -p wa -k MAC-policy' || { echo step1: missing '-w /etc/apparmor -p wa -k MAC-policy'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /usr/share/apparmor -p wa -k MAC-policy' || { echo step1: missing '-w /usr/share/apparmor -p wa -k MAC-policy'; return 1; }; o=$(bash -c 'auditctl -l | awk '"'"'/^ *-w/ &&(/\/etc\/apparmor/ ||/\/usr\/share\/apparmor/) &&/ +-p *wa/ &&(/ key= *[!-~]* *$/||/ -k *[!-~]* *$/)'"'"'' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /etc/apparmor -p wa -k MAC-policy' || { echo step2: missing '-w /etc/apparmor -p wa -k MAC-policy'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /usr/share/apparmor -p wa -k MAC-policy' || { echo step2: missing '-w /usr/share/apparmor -p wa -k MAC-policy'; return 1; }; }; if alt0; then echo compliant; fi

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Note: If a different Mandatory Access Control method is used, changes to the corresponding directories should be audited. Edit or create a file in the /etc/audit/rules.d/ directory, ending in .rules extension, with the relevant rules to monitor events that modify the system's Mandatory Access Controls. Example: # printf " -w /etc/apparmor -p wa -k MAC-policy -w /usr/share/apparmor -p wa -k MAC-policy " >> /etc/audit/rules.d/50-MAC-policy.rules Merge and load the rules into active configuration: # augenrules --load Check if reboot is required. # if [[ $(auditctl -s | grep "enabled") =~ "2" ]]; then printf "Reboot required to load rules\n"; fi

속성

운영 체제: sles-15
태그: cis-convertedlinux
참고 자료: CIS SUSE Linux Enterprise 15 Benchmark v2.0.1 - 6.3.3.14

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