The x86 Ctrl-Alt-Delete key sequence must be disabled on TOSS.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| high | V-253109 | SRG-OS-000480-GPOS-00227 | TOSS-04-040680 | SV-253109r991589_rule | 2024-05-30 | 2 |
| 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 availability of systems 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. |
| ℹ️ Check |
|---|
| Verify TOSS is not configured to reboot the system when Ctrl-Alt-Delete is pressed with 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 the "ctrl-alt-del.target" is loaded and not masked, this is a finding. |
| ✔️ Fix |
|---|
| Configure the system to disable the Ctrl-Alt-Delete sequence for the command line with the following command: $ sudo systemctl mask ctrl-alt-del.target Created symlink /etc/systemd/system/ctrl-alt-del.target -> /dev/null Reload the daemon for this change to take effect. $ sudo systemctl daemon-reload |