TMA-ROS1-1.1.21

Ensure sticky bit is set on all world-writable directories

보통레벨 1자동ros

설명

Setting the sticky bit on world writable directories prevents users from deleting or renaming files in that directory that are not owned by them. The audit searches local filesystems for world-writable directories without the sticky bit and requires none. Host-level control from the CIS ROS Melodic benchmark (Ubuntu 18.04 robot hosts); run as root.

점검 방법

감사 방식: 셸 명령

shell

command -v findmnt >/dev/null 2>&1 || exit 1
mps=$(findmnt -rn -l -o TARGET,FSTYPE | awk '$2 !~ /^(nfs|nfs4|cifs|smb3|smbfs|fuse|proc|sysfs|tmpfs|devtmpfs|devpts|cgroup|cgroup2|pstore|securityfs|debugfs|tracefs|configfs|bpf|mqueue|hugetlbfs|autofs|binfmt_misc|efivarfs|overlay|squashfs|nsfs|ramfs|fusectl|rpc_pipefs)$/ {print $1}')
out=$(for m in $mps; do find "$m" -xdev -type d \( -perm -0002 -a \! -perm -1000 \) -print 2>/dev/null; done | sort -u | head -n 50)
[ -z "$out" ] && echo compliant || { printf '%s\n' "$out"; echo 'world-writable directories without the sticky bit'; }

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Run the following command to set the sticky bit on all world writable directories: # df --local -P | awk '{if (NR!=1) print $6}' | xargs -I '{}' find '{}' -xdev -type d $ -perm -0002 -a ! -perm -1000 $ 2>/dev/null | xargs -I '{}' chmod a+t '{}'

속성

운영 체제: 모두
태그: rosros1melodicsystem
참고 자료: CIS ROS Melodic Benchmark v1.0.0 - 1.1.21 Ensure sticky bit is set on all world-writable directories

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shell

tmaegis scan --target ros