Ensure the SELinux mode is enforcing

低レベル 2自動linux

説明

SELinux can run in one of three modes: disabled, permissive, or enforcing: • Enforcing - Is the default, and recommended, mode of operation; in enforcing mode SELinux operates normally, enforcing the loaded security policy on the entire system. • Permissive - The system acts as if SELinux is enforcing the loaded security policy, including labeling objects and emitting access denial entries in the logs, but it does not actually deny any operations. While not recommended for production systems, permissive mode can be helpful for SELinux policy development. • Disabled - Is strongly discouraged; n

チェック方法

監査方法: シェルコマンド

shell

alt0() { command -v grep >/dev/null 2>&1 || { echo "step1: grep not installed"; return 1; }; o=$(bash -c 'grep -Pi -- '"'"'^\h*SELINUX=enforcing\b'"'"' /etc/selinux/config' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- SELINUX=enforcing || { echo step1: missing SELINUX=enforcing; return 1; }; command -v getenforce >/dev/null 2>&1 || { echo "step2: getenforce not installed"; return 1; }; o=$(bash -c getenforce 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- Enforcing || { echo step2: missing Enforcing; return 1; }; }; if alt0; then echo compliant; fi

期待される出力: compliant

修正方法

修正方法: ガイダンスまたは IaC パッチ

1. Edit /etc/selinux/config and update the SELINUX parameter to SELINUX=enforcing Example: SELINUX=enforcing 2. Update the SELinux running state to enforcing: • If SELinux is currently disabled: Run the following command to create /.autorelabel: # touch /.autorelabel Run the following command to reboot the system: # reboot WARNING: The autorelabel may be a long running process and require significant downtime. This should be planed for before executing the reboot! • If SELinux is not currently disabled: Run the following commands to set SELinux's running mode to Enforcing: # setenforce 1

プロパティ

オペレーティングシステム: rocky-8
タグ: cis-convertedlinux
参照: CIS Rocky Linux 8 Benchmark v3.0.0 - 1.3.1.5

このホストをチェック

監査が許可されているマシンで実行してください。スキャンは読み取り専用です。

shell

tmaegis scan --target linux --level 2