Ensure sensitive host system directories are not mounted on containers

높음레벨 1자동docker

설명

Mounting host system directories (/, /boot, /dev, /etc, /lib, /proc, /sys, /usr) lets a container read or change the host. Flags those directories mounted in any mode, and anything below them mounted read-write. The audit inspects every running container (docker ps -q) and prints the offending names; a host with no running containers is compliant.

점검 방법

감사 방식: 셸 명령

shell

ids=$(docker ps -q) || exit 1; [ -z "$ids" ] && { echo compliant; exit 0; }; out=$(docker inspect --format '{{.Name}} {{range .Mounts}} {{.Source}}|{{.RW}}{{end}}' $ids) || exit 1; bad=$(printf '%s\n' "$out" | awk '{for(i=2;i<=NF;i++){split($i,a,"|"); if(a[1] ~ /^\/(boot|dev|etc|lib|proc|sys|usr)?$/ || (a[2]=="true" && a[1] ~ /^\/(boot|dev|etc|lib|proc|sys|usr)\//)) print $1" "a[1]}}'); [ -z "$bad" ] && echo compliant || printf '%s\n' "$bad"

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Redeploy the container without bind mounts of sensitive host directories; if a file is truly needed, mount only that file read-only (-v /etc/foo:/etc/foo:ro).

속성

운영 체제: 모두
태그: dockerruntime
참고 자료: CIS Docker Benchmark v1.9.0 - 5.6 Ensure sensitive host system directories are not mounted on containers

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shell

tmaegis scan --target docker