Ensure unused symbolic links are removed

中等級 1自動化aix

說明

This recommendation finds and removes symbolic links whose targets are missing. Symbolic Links that do not have a valid target are a risk to system integrity. The recommendation is to scan frequently (weekly or daily) for symbolic links without a valid target object and remove them. Do not assume that anyone responsible for maintaining system integrity is (actively) monitoring unknown software. Symbolic links - pointing at nothing - are, by definition, unauthorized and/or belong on a blocklist. Audit: lists dangling symbolic links on local JFS/JFS2 filesystems (long running).

檢查方式

稽核方法: Shell 指令

shell

command -v find >/dev/null 2>&1 || exit 1; out=$( { find -L / \( -fstype jfs -o -fstype jfs2 \) -type l -ls ; } 2>/dev/null ); [ -z "$out" ] && echo compliant || printf '%s\n' "$out" | head -n 20

預期輸出: compliant

修補方式

修補方法: 操作指南或基礎設施修補檔

The following command will remove all symbolic links that lack a valid target object: find -L / \( -fstype jfs -o -fstype jfs2 \) -type l | xargs rm

屬性

作業系統: 不限
標籤: aixhardening
參考資料: CIS IBM AIX 7 Benchmark v1.2.0 - 2.7 Ensure unused symbolic links are removed

檢查此主機

請在您有權稽核的機器上執行此指令。掃描為唯讀操作。

shell

tmaegis scan --target aix