The x86 Ctrl-Alt-Delete key sequence must be disabled on OL 8.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-248869 | OL08-00-040170 | SV-248869r991589_rule | High |
| Description |
| A locally logged-on 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 OS environment, this can create the risk of short-term loss of system 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 |
| Oracle Linux 8 Security Technical Implementation Guide | 2025-05-13 |
Details
| Check Text (C-52303r780171_chk) |
| Verify OL 8 is not configured to reboot the system when Ctrl-Alt-Delete is pressed with the following command: $ sudo systemctl status ctrl-alt-del.target | grep Loaded: Loaded: masked (Reason: Unit ctrl-alt-del.target is masked.) If the "ctrl-alt-del.target" Loaded: value is not set to "masked", this is a finding. |
| Fix Text (F-52257r833245_fix) |
| 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 |