TMA-COS-1.3.1

Ensure authentication required for single user mode

보통레벨 1자동cos

설명

Single user mode (rescue mode) is used for recovery when the system detects an issue during boot or by manual selection from the bootloader. Requiring authentication in single user mode (rescue mode) prevents an unauthorized user from rebooting the system into single user to gain root privileges without credentials.

점검 방법

감사 방식: 셸 명령

shell

alt0() { command -v grep >/dev/null 2>&1 || { echo "step1: grep not installed"; return 1; }; o=$(bash -c 'grep /systemd-sulogin-shell /usr/lib/systemd/system/rescue.service' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- 'ExecStart=-/usr/lib/systemd/systemd-sulogin-shell rescue' || { echo step1: missing 'ExecStart=-/usr/lib/systemd/systemd-sulogin-shell rescue'; return 1; }; command -v grep >/dev/null 2>&1 || { echo "step2: grep not installed"; return 1; }; o=$(bash -c 'grep /systemd-sulogin-shell /usr/lib/systemd/system/emergency.service' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- 'ExecStart=-/usr/lib/systemd/systemd-sulogin-shell emergency' || { echo step2: missing 'ExecStart=-/usr/lib/systemd/systemd-sulogin-shell emergency'; return 1; }; }; if alt0; then echo compliant; fi

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Rootfs is read-only file system. Therefore, update to an OS image which requires single user mode authentication.

속성

운영 체제: 모두
태그: authcontainer-optimized-oscos
참고 자료: CIS Google Container-Optimized OS Benchmark v1.2.0 - 1.3.1 Ensure authentication required for single user mode

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shell

tmaegis scan --target cos