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The x86 Ctrl-Alt-Delete key sequence must be disabled.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-214994 | UBTU-16-010630 | SV-214994r610931_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. In the GNOME graphical 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 |
|---|---|
| Canonical Ubuntu 16.04 LTS Security Technical Implementation Guide | 2020-12-09 |
Details
| Check Text ( C-16193r284850_chk ) |
|---|
| Verify the Ubuntu operating system is not configured to reboot the system when Ctrl-Alt-Delete is pressed. Check that the "ctrl-alt-del.target" (otherwise also known as reboot.target) is not active with the following command: # systemctl status ctrl-alt-del.target reboot.target - Reboot Loaded: loaded (/usr/lib/systemd/system/reboot.target; disabled) Active: inactive (dead) Docs: man:systemd.special(7) If the "ctrl-alt-del.target" is active, this is a finding. |
| Fix Text (F-16191r284851_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 And reload the daemon to take effect # sudo systemctl daemon-reload |