Title

Duplicate user names must not exist. (Cat II impact)

Discussion

If a user is assigned a duplicate user name, it will create and have access to files with the first UID for that username in passwd.

Check Content

The root role is required. Identify any duplicate user names. # getent passwd | awk -F: '{print $1}' | uniq -d If output is produced, this is a finding.

Fix Text

The root role is required. Correct or justify any items discovered in the Check step. Determine if there are any duplicate user names, and work with their respective owners to determine the best course of action in accordance with site policy. Delete or change the user name of duplicate users.

Additional Identifiers

Rule ID: SV-216193r603268_rule

Vulnerability ID: V-216193

Group Title: SRG-OS-000480

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.