DISA STIGS Viewer

Finding ID	Version	Rule ID	IA Controls	Severity
V-271465	OL09-00-000145	SV-271465r1091107_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

Check Text (C-75515r1091105_chk)

Verify that OL 9 does not have a graphical user interface installed with the following command: $ dnf list --installed "xorg*common" Error: No matching Packages to list If the "x11-server-common" package is installed, and the use of a graphical user interface has not been documented with the information system security officer (ISSO) as an operational requirement, this is a finding.

Fix Text (F-75422r1091106_fix)

Remove all xorg packages with the following command: Warning: If accessing the system through the graphical user interface, change to the multi-user.target with the following command: $ sudo systemctl isolate multi-user.target Warning: Removal of the graphical user interface will immediately render it useless. The following commands must not be run from a virtual terminal emulator in the graphical interface. $ sudo dnf remove "xorg*" $ sudo systemctl set-default multi-user.target If there is an operational requirement for a graphical user interface it must be documented with the ISSO.