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 automatically lock graphical user sessions after 10 minutes of inactivity.

DISA Rule

SV-252949r1155813_rule

Vulnerability Number

V-252949

Group Title

SRG-OS-000029-GPOS-00010

Rule Version

TOSS-04-020030

Severity

CAT II

CCI(s)

CCI-000057 - The information system initiates a session lock after the organization-defined time period of inactivity.

Weight

Fix Recommendation

Configure the operating system to initiate a screensaver after a 10-minute period of inactivity for graphical user interfaces.

Create a database to contain the systemwide screensaver settings (if it does not already exist) with the following command:

$ sudo touch /etc/dconf/db/local.d/00-screensaver

Edit /etc/dconf/db/local.d/00-screensaver and add or update the following lines:

[org/gnome/desktop/session]
# Set the lock time out to 600 seconds before the session is considered idle
idle-delay=uint32 600

Update the system databases:

$ sudo dconf update

Check Contents

Verify TOSS initiates a session lock after at most a 10-minute period of inactivity for graphical user interfaces with the following commands:

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.desktop.session idle-delay
uint32 600

If "idle-delay" is set to "0" or a value greater than "600", this is a finding.

Vulnerability Number

V-252949

Documentable

False

Rule Version

TOSS-04-020030

Severity Override Guidance

Check Content Reference

Target Key

5469