RHEL 9 duplicate User IDs (UIDs) must not exist for interactive users.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-258045 | RHEL-09-411030 | SV-258045r958482_rule | CCI-000135 | medium |
| Description | ||||
| To ensure accountability and prevent unauthenticated access, interactive users must be identified and authenticated to prevent potential misuse and compromise of the system. Satisfies: SRG-OS-000104-GPOS-00051, SRG-OS-000121-GPOS-00062, SRG-OS-000042-GPOS-00020 | ||||
| STIG | Date | |||
| Red Hat Enterprise Linux 9 Security Technical Implementation Guide | 2025-05-14 | |||
Details
Check Text (C-258045r958482_chk)
Verify that RHEL 9 contains no duplicate UIDs for interactive users with the following command:
$ sudo awk -F ":" 'list[$3]++{print $1, $3}' /etc/passwd
If output is produced and the accounts listed are interactive user accounts, this is a finding.
Fix Text (F-61710r926121_fix)
Edit the file "/etc/passwd" and provide each interactive user account that has a duplicate UID with a unique UID.