OL 9 must be configured so that the graphical display manager is not the default target unless approved.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-271440 | OL09-00-000020 | SV-271440r1092462_rule | Medium |
| Description |
| Unnecessary service packages must not be installed to decrease the attack surface of the system. Graphical display managers have a long history of security vulnerabilities and must not be used unless approved and documented. |
| STIG | Date |
| Oracle Linux 9 Security Technical Implementation Guide | 2025-05-08 |
Details
| Check Text (C-75490r1091030_chk) |
| Verify that OL 9 is configured to boot to the command line: $ systemctl get-default multi-user.target If the system default target is not set to "multi-user.target" and the information system security officer (ISSO) lacks a documented requirement for a graphical user interface, this is a finding. |
| Fix Text (F-75397r1091031_fix) |
| Configure OL 9 to boot to the command line. Set the default target to multi-user with the following command: $ sudo systemctl set-default multi-user.target If there is an operational requirement for a graphical user interface, document it with the ISSO. |