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 | CCI-000366 | 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-271440r1092462_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.