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

Severity
Group ID
Group Title
Version
Rule ID
Date
STIG Version
highV-269216SRG-OS-000480-GPOS-00229ALMA-09-015420SV-269216r1050098_rule2025-02-201
Description
Failure to restrict system access to authenticated users negatively impacts operating system security.
ℹ️ Check
Note: This requirement assumes the use of the AlmaLinux OS 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. Verify AlmaLinux OS 9 does not allow an unattended or automatic logon to the system via a graphical user interface. 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
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