Ensure no duplicate user names exist

中级别 1自动化linux

说明

Although the useradd program will not let you create a duplicate user name, it is possible for an administrator to manually edit the /etc/passwd file and change the username.

检查方式

审计方法: Shell 命令

shell

alt0() { o=$(bash -c '#!/usr/bin/env bash

{
   while read -r l_count l_user; do
      if [ "$l_count" -gt 1 ]; then
         echo -e "Duplicate User: \"$l_user\" Users: \"$(awk -F: '"'"'($1 == n) { print $1 }'"'"' n=$l_user /etc/passwd | xargs)\""
      fi
   done < <(cut -f1 -d":" /etc/passwd | sort -n | uniq -c)
}' 2>&1); [ -z "$o" ] || { echo "step1: $o" | head -c 300; return 1; }; }; if alt0; then echo compliant; fi

预期输出: compliant

修复方式

修复方法: 操作指南或基础设施补丁

Based on the Audit Procedure output, for each duplicated user name, determine which entry is correct and make each user name unique. Use vipw to safely edit the user database and either remove the redundant entry or rename it to a unique user name: # vipw File ownerships will reflect the change automatically as long as each account has a unique UID.

属性

操作系统: rocky-9
标签: cis-convertedlinux
参考: CIS Rocky Linux 9 Benchmark v3.0.0 - 7.2.6

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 linux