TMA-ROS1-1.1.21

Ensure sticky bit is set on all world-writable directories

中级别 1自动化ros

说明

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.

检查方式

审计方法: Shell 命令

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'; }

预期输出: compliant

修复方式

修复方法: 操作指南或基础设施补丁

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 '{}'

属性

操作系统: 任意
标签: rosros1melodicsystem
参考: CIS ROS Melodic Benchmark v1.0.0 - 1.1.21 Ensure sticky bit is set on all world-writable directories

检查本机

请在您有权审计的机器上运行此命令。扫描为只读操作。

shell

tmaegis scan --target ros