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

The x86 Ctrl-Alt-Delete key sequence must be disabled on TOSS 5.

DISA Rule

SV-282558r1200654_rule

Vulnerability Number

V-282558

Group Title

SRG-OS-000324-GPOS-00125

Rule Version

TOSS-05-000091

Severity

CAT I

CCI(s)

• CCI-002235 - Prevent non-privileged users from executing privileged functions.

Weight

10

Fix Recommendation

Configure TOSS 5 to disable "ctrl-alt-del.target" using the following command:

$ sudo systemctl disable --now ctrl-alt-del.target
$ sudo systemctl mask --now ctrl-alt-del.target

Check Contents

Verify TOSS 5 is not configured to reboot the system when Ctrl-Alt-Delete is pressed using the following command:

$ sudo systemctl status ctrl-alt-del.target

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

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

Vulnerability Number

V-282558

Documentable

False

Rule Version

TOSS-05-000091

Severity Override Guidance

Verify TOSS 5 is not configured to reboot the system when Ctrl-Alt-Delete is pressed using the following command:

$ sudo systemctl status ctrl-alt-del.target

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

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

Check Content Reference

M

Target Key

5738