The systemd Ctrl-Alt-Delete burst key sequence in AlmaLinux OS 9 must be disabled.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| high | V-269140 | SRG-OS-000324-GPOS-00125 | ALMA-09-006620 | SV-269140r1050022_rule | 2025-02-20 | 1 |
| Description |
|---|
| A locally logged-on user who presses Ctrl-Alt-Delete in quick succession 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 AlmaLinux OS 9 is configured to not 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 | grep -v '#' | grep CtrlAltDel CtrlAltDelBurstAction=none If "CtrlAltDelBurstAction" is not set to "none", is commented out, or is missing, this is a finding. |
| ✔️ Fix |
|---|
| Configure the system to disable the CtrlAltDelBurstAction by added or modifying the following line in the "/etc/systemd/system.conf" configuration file: CtrlAltDelBurstAction=none Reload the daemon for this change to take effect. $ systemctl daemon-reexec |