The Oracle Linux operating system must not have a graphical display manager installed unless approved.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-221888	OL07-00-040730	SV-221888r603260_rule		Medium

Description
Internet services not required for system or application processes must not be active 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 7 Security Technical Implementation Guide	2020-12-08

Details

Check Text ( C-36329r602581_chk )

Verify the system 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. Verify that a graphical user interface is not installed: # rpm -qa | grep xorg | grep server Ask the System Administrator if use of a graphical user interface is an operational requirement. If the use of a graphical user interface on the system is not documented with the ISSO, this is a finding.

Fix Text (F-36293r602582_fix)
Document the requirement for a graphical user interface with the ISSO or remove the related packages with the following commands: # rpm -e xorg-x11-server-common # systemctl set-default multi-user.target