Information
OL 9 must be configured so that the x86 Ctrl-Alt-Delete key sequence is disabled.
GROUP ID: V-271752
RULE ID: SV-271752r1091968
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.
Solution
Configure OL 9 to disable the ctrl-alt-del.target with the following command:
$ sudo systemctl disable --now ctrl-alt-del.target
$ sudo systemctl mask --now ctrl-alt-del.target