The x86 Ctrl-Alt-Delete key sequence must be disabled on TOSS 5.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-282558 | TOSS-05-000091 | SV-282558r1200654_rule | CCI-002235 | high |
| Description | ||||
| A locally logged-in user who presses Ctrl-Alt-Delete when at the console can reboot the system. If accidentally pressed, as could happen in the case of a mixed operating system environment, this can create the risk of short-term loss of systems availability due to unintentional reboot. In a graphical user environment, risk of unintentional reboot from the Ctrl-Alt-Delete sequence is reduced because the user will be prompted before any action is taken. | ||||
| STIG | Date | |||
| Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide | 2026-04-01 | |||
Details
Check Text (C-282558r1200654_chk)
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.
Fix Text (F-87024r1200653_fix)
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