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V-257781

CAT II (Medium)

The graphical display manager must not be the default target on RHEL 9 unless approved.

Rule ID

SV-257781r991589_rule

STIG

Red Hat Enterprise Linux 9 Security Technical Implementation Guide

Version

V2R8

CCIs

CCI-000366

Discussion

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.

Check Content

Verify that RHEL 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

Document the requirement for a graphical user interface with the ISSO or set the default target to multi-user with the following command:

$ sudo systemctl set-default multi-user.target