STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 26 Mar 2026:

TOSS 5 must not allow an unattended or automatic logon to the system.

DISA Rule

SV-282757r1201251_rule

Vulnerability Number

V-282757

Group Title

SRG-OS-000480-GPOS-00229

Rule Version

TOSS-05-000245

Severity

CAT I

CCI(s)

CCI-000366 - Implement the security configuration settings.

Weight

Fix Recommendation

Configure TOSS to not allow an unattended or automatic logon to the system via a graphical user interface.

Add or edit the line for the "AutomaticLoginEnable" parameter in the [daemon] section of the "/etc/gdm/custom.conf" file to "false":

[daemon]
AutomaticLoginEnable=false

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

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.

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

$ sudo grep -i automaticloginenable /etc/gdm/custom.conf
AutomaticLoginEnable=false

Automatic logon as an authorized user allows access to any user with physical access to the operating system.

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

Vulnerability Number

V-282757

Documentable

False

Rule Version

TOSS-05-000245

Severity Override Guidance

Check Content Reference

Target Key

5738