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Ubuntu 22.04 LTS must disable the x86 Ctrl-Alt-Delete key sequence.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-260469 | UBTU-22-211015 | SV-260469r991589_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 availability of systems due to unintentional reboot. |
| STIG | Date |
|---|---|
| Canonical Ubuntu 22.04 LTS Security Technical Implementation Guide | 2024-05-30 |
Details
| Check Text ( C-64198r953218_chk ) |
|---|
| Verify Ubuntu 22.04 LTS is not configured to reboot the system when Ctrl-Alt-Delete is pressed by using the following command: $ 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 not masked, this is a finding. |
| Fix Text (F-64106r953219_fix) |
|---|
| Configure Ubuntu 22.04 LTS to disable the Ctrl-Alt-Delete sequence for the command line by using the following commands: $ sudo systemctl disable ctrl-alt-del.target $ sudo systemctl mask ctrl-alt-del.target Reload the daemon to take effect: $ sudo systemctl daemon-reload |