RHEL 9 must not allow unattended or automatic logon via the graphical user interface.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-258018	RHEL-09-271040	SV-258018r991591_rule		High

Description
Failure to restrict system access to authenticated users negatively impacts operating system security.

STIG	Date
Red Hat Enterprise Linux 9 Security Technical Implementation Guide	2024-06-04

Details

Check Text ( C-61759r926039_chk )
Verify RHEL 9 does not allow an unattended or automatic logon to the system via a graphical user interface. Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. Check for the value of the "AutomaticLoginEnable" in the "/etc/gdm/custom.conf" file with the following command: $ grep -i automaticlogin /etc/gdm/custom.conf [daemon] AutomaticLoginEnable=false If the value of "AutomaticLoginEnable" is not set to "false", this is a finding.

Check Text ( C-61759r926039_chk )

Verify RHEL 9 does not allow an unattended or automatic logon to the system via a graphical user interface.

Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable.

Check for the value of the "AutomaticLoginEnable" in the "/etc/gdm/custom.conf" file with the following command:

$ grep -i automaticlogin /etc/gdm/custom.conf

[daemon]
AutomaticLoginEnable=false

If the value of "AutomaticLoginEnable" is not set to "false", this is a finding.

Fix Text (F-61683r926040_fix)
Configure the GNOME desktop display manager to disable automatic login. Set AutomaticLoginEnable to false in the [daemon] section in /etc/gdm/custom.conf. For example: [daemon] AutomaticLoginEnable=false