The SUSE operating system must disable the systemd Ctrl-Alt-Delete burst key sequence.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-234990 | SLES-15-040062 | SV-234990r1106565_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 graphical user interface 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 |
| SUSE Linux Enterprise Server 15 Security Technical Implementation Guide | 2025-05-14 |
Details
| Check Text (C-38178r1102123_chk) |
| Verify the SUSE operating system is not configured to reboot the system when Ctrl-Alt-Delete is pressed seven times within two seconds with the following command: > systemd-analyze cat-config systemd/system.conf # /etc/systemd/system.conf.d/55-CtrlAltDel-BurstAction.conf CtrlAltDelBurstAction=none If the "CtrlAltDelBurstAction" is not set to "none", commented out, or is missing, this is a finding. If the setting is not configured in a drop in file, this is a finding. |
| Fix Text (F-38141r1102124_fix) |
| Configure the system to disable the CtrlAltDelBurstAction by adding it to a drop file in a "/etc/systemd/system.conf.d/" configuration file: If no drop file exists, create one with the following command: > sudo touch /etc/systemd/system.conf.d/55-CtrlAltDel-BurstAction Edit the file to contain the setting by adding the following text: CtrlAltDelBurstAction=none Reload the daemon for this change to take effect: > sudo systemctl daemon-reexec |