Ensure no duplicate user names exist

How it is checked

Audit method: Shell command

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

Expected output

compliant

How it is fixed

Fix method: Guidance or infrastructure patch

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.

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

tmaegis scan --target linux