RHEL 9 must not have unauthorized accounts.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-258058	RHEL-09-411095	SV-258058r991589_rule		Medium

Description
Accounts providing no operational purpose provide additional opportunities for system compromise. Unnecessary accounts include user accounts for individuals not requiring access to the system and application accounts for applications not installed on the system.

STIG	Date
Red Hat Enterprise Linux 9 Security Technical Implementation Guide	2024-06-04

Details

Check Text ( C-61799r926159_chk )
Verify that there are no unauthorized interactive user accounts with the following command: $ less /etc/passwd root:x:0:0:root:/root:/bin/bash ... games:x:12:100:games:/usr/games:/sbin/nologin scsaustin:x:1001:1001:scsaustin:/home/scsaustin:/bin/bash djohnson:x:1002:1002:djohnson:/home/djohnson:/bin/bash Interactive user account, generally will have a user identifier (UID) of 1000 or greater, a home directory in a specific partition, and an interactive shell. Obtain the list of interactive user accounts authorized to be on the system from the system administrator or information system security officer (ISSO) and compare it to the list of local interactive user accounts on the system. If there are unauthorized local user accounts on the system, this is a finding.

Check Text ( C-61799r926159_chk )

Verify that there are no unauthorized interactive user accounts with the following command:

$ less /etc/passwd

root:x:0:0:root:/root:/bin/bash
...
games:x:12:100:games:/usr/games:/sbin/nologin
scsaustin:x:1001:1001:scsaustin:/home/scsaustin:/bin/bash
djohnson:x:1002:1002:djohnson:/home/djohnson:/bin/bash

Interactive user account, generally will have a user identifier (UID) of 1000 or greater, a home directory in a specific partition, and an interactive shell.

Obtain the list of interactive user accounts authorized to be on the system from the system administrator or information system security officer (ISSO) and compare it to the list of local interactive user accounts on the system.

If there are unauthorized local user accounts on the system, this is a finding.

Fix Text (F-61723r926160_fix)
Remove unauthorized local interactive user accounts with the following command where is the unauthorized account: $ sudo userdel