The root account must be the only account having unrestricted access to the RHEL 8 system.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-230534 | RHEL-08-040200 | SV-230534r1017296_rule | CCI-000366 | high |
| Description | ||||
| If an account other than root also has a User Identifier (UID) of "0", it has root authority, giving that account unrestricted access to the entire operating system. Multiple accounts with a UID of "0" afford an opportunity for potential intruders to guess a password for a privileged account. | ||||
| STIG | Date | |||
| Red Hat Enterprise Linux 8 Security Technical Implementation Guide | 2025-05-14 | |||
Details
Check Text (C-230534r1017296_chk)
Check the system for duplicate UID "0" assignments with the following command:
$ sudo awk -F: '$3 == 0 {print $1}' /etc/passwd
If any accounts other than root have a UID of "0", this is a finding.
Fix Text (F-33178r568349_fix)
Change the UID of any account on the system, other than root, that has a UID of "0".
If the account is associated with system commands or applications, the UID should be changed to one greater than "0" but less than "1000". Otherwise, assign a UID of greater than "1000" that has not already been assigned.