STIGQter 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 disable the x86 Ctrl-Alt-Delete key sequence.

DISA Rule

SV-270712r1068363_rule

Vulnerability Number

V-270712

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

UBTU-24-300026

Severity

CAT I

CCI(s)

Weight

10

Fix Recommendation

Configure the system to disable the Ctrl-Alt-Delete sequence for the command line with the following commands:

$ sudo systemctl disable ctrl-alt-del.target
[...]

$ sudo systemctl mask ctrl-alt-del.target
Created symlink /etc/systemd/system/ctrl-alt-del.target ? /dev/null.

Reload the daemon to take effect:

$ sudo systemctl daemon-reload

Check Contents

Verify Ubuntu 24.04 LTS is not configured to reboot the system when Ctrl-Alt-Delete is pressed with the following command:

$ systemctl status ctrl-alt-del.target
o ctrl-alt-del.target
Loaded: masked (Reason: Unit ctrl-alt-del.target is masked.)
Active: inactive (dead)

If the "ctrl-alt-del.target" is not masked, this is a finding.

Vulnerability Number

V-270712

Documentable

False

Rule Version

UBTU-24-300026

Severity Override Guidance

Verify Ubuntu 24.04 LTS is not configured to reboot the system when Ctrl-Alt-Delete is pressed with the following command:

$ systemctl status ctrl-alt-del.target
o ctrl-alt-del.target
Loaded: masked (Reason: Unit ctrl-alt-del.target is masked.)
Active: inactive (dead)

If the "ctrl-alt-del.target" is not masked, this is a finding.

Check Content Reference

M

Target Key

5673