STIGQter: STIG Summary: Canonical Ubuntu 24.04 LTS Security Technical Implementation Guide Version: 1 Release: 6 Benchmark Date: 01 Jul 2026:

Ubuntu 24.04 LTS must conceal, via the session lock, information previously visible on the display with a publicly viewable image.

DISA Rule

SV-274871r1107302_rule

Vulnerability Number

V-274871

Group Title

SRG-OS-000031-GPOS-00012

Rule Version

UBTU-24-200043

Severity

CAT II

CCI(s)

CCI-000060 - Conceal, via the device lock, information previously visible on the display with a publicly viewable image.

Weight

Fix Recommendation

Configure Ubuntu 24.04 LTS to prevent a user from overriding the picture-uri setting for graphical user interfaces.

In the file "/etc/dconf/db/local.d/00-security-settings", add or update the following lines:

[org/gnome/desktop/screensaver]
picture-uri=''

Prevent user modification by adding the following line to "/etc/dconf/db/local.d/locks/00-security-settings-lock":

/org/gnome/desktop/screensaver/picture-uri

Update the dconf system databases:

$ sudo dconf update

Check Contents

Note: This requirement assumes the use of the Ubuntu 24.04 LTS default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable.

To verify the screensaver is configured to be blank, run the following command:

$ gsettings writable org.gnome.desktop.screensaver picture-uri

false

If "picture-uri" is writable and the result is "true", this is a finding.

Vulnerability Number

V-274871

Documentable

False

Rule Version

UBTU-24-200043

Severity Override Guidance

Check Content Reference

Target Key

5673