OL 9 audit system must protect logon UIDs from unauthorized change.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-271885 | OL09-00-008000 | SV-271885r1092367_rule | Medium |
| Description |
| If modification of login user identifiers (UIDs) is not prevented, they can be changed by nonprivileged users and make auditing complicated or impossible. Satisfies: SRG-OS-000462-GPOS-00206, SRG-OS-000475-GPOS-00220, SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029 |
| STIG | Date |
| Oracle Linux 9 Security Technical Implementation Guide | 2025-05-08 |
Details
| Check Text (C-75935r1092365_chk) |
| Verify that OL 9 audit system configuration prevents unauthorized changes to logon UIDs with the following command: $ sudo grep -i immutable /etc/audit/audit.rules --loginuid-immutable If the "--loginuid-immutable" option is not returned in the "/etc/audit/audit.rules", or the line is commented out, this is a finding. |
| Fix Text (F-75842r1092366_fix) |
| Configure OL 9 auditing to prevent modification of login UIDs once they are set by adding the following line to /etc/audit/rules.d/audit.rules: --loginuid-immutable The audit daemon must be restarted for the changes to take effect. $ sudo service auditd restart |