STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 4 Security Technical Implementation Guide Version: 2 Release: 6 Benchmark Date: 01 Jul 2026:

TOSS must disable the user list at logon for graphical user interfaces.

DISA Rule

SV-252964r991589_rule

Vulnerability Number

V-252964

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

TOSS-04-020250

Severity

CAT II

CCI(s)

CCI-000366 - Implement the security configuration settings.

Weight

Fix Recommendation

Configure the operating system to disable the user list at logon for graphical user interfaces.

Create a database to contain the system-wide screensaver settings (if it does not already exist) with the following command:
Note: The example below is using the database "local" for the system, so if the system is using another database in "/etc/dconf/profile/user", the file should be created under the appropriate subdirectory.

$ sudo touch /etc/dconf/db/local.d/02-login-screen

[org/gnome/login-screen]
disable-user-list=true

Update the system databases:
$ sudo dconf update

Check Contents

Verify the operating system disables the user logon list for graphical user interfaces with the following command:

Note: This requirement assumes the use of the TOSS default graphical user interface, Gnome Shell. If the system does not have any graphical user interface installed, this requirement is Not Applicable.

$ sudo gsettings get org.gnome.login-screen disable-user-list
true

If the setting is "false", this is a finding.

Vulnerability Number

V-252964

Documentable

False

Rule Version

TOSS-04-020250

Severity Override Guidance

Check Content Reference

Target Key

5469