STIGQter STIGQter: STIG Summary: Canonical Ubuntu 22.04 LTS Security Technical Implementation Guide Version: 2 Release: 9 Benchmark Date: 01 Jul 2026:

Ubuntu 22.04 LTS must disable the x86 Ctrl-Alt-Delete key sequence if a graphical user interface is installed.

DISA Rule

SV-260539r1184066_rule

Vulnerability Number

V-260539

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

UBTU-22-271030

Severity

CAT I

CCI(s)

Weight

10

Fix Recommendation

Configure Ubuntu 22.04 LTS to disable the Ctrl-Alt-Delete sequence when using a graphical user interface.

Create or edit a file named /etc/dconf/db/local.d/00-mediakeys with the following contents:

[org/gnome/settings-daemon/plugins/media-keys]
logout=@as []

Update the dconf settings:

$ sudo dconf update

Check Contents

Verify Ubuntu 22.04 LTS is not configured to reboot the system when Ctrl-Alt-Delete is pressed when using a graphical user interface by using the following command:

Note: If no graphical user interface is installed, this requirement is not applicable.

$ gsettings get org.gnome.settings-daemon.plugins.media-keys logout
@as []

If the "logout" key is bound to an action, is commented out, or is missing, this is a finding.

Vulnerability Number

V-260539

Documentable

False

Rule Version

UBTU-22-271030

Severity Override Guidance

Verify Ubuntu 22.04 LTS is not configured to reboot the system when Ctrl-Alt-Delete is pressed when using a graphical user interface by using the following command:

Note: If no graphical user interface is installed, this requirement is not applicable.

$ gsettings get org.gnome.settings-daemon.plugins.media-keys logout
@as []

If the "logout" key is bound to an action, is commented out, or is missing, this is a finding.

Check Content Reference

M

Target Key

5594