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The x86 Ctrl-Alt-Delete key sequence must be disabled on OL 8.


Finding ID Version Rule ID IA Controls Severity
V-248869 OL08-00-040170 SV-248869r833246_rule High
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 system availability 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.
Oracle Linux 8 Security Technical Implementation Guide 2022-12-06


Check Text ( C-52303r780171_chk )
Verify OL 8 is not configured to reboot the system when Ctrl-Alt-Delete is pressed with the following command:

$ sudo systemctl status ctrl-alt-del.target | grep Loaded:

Loaded: masked (Reason: Unit ctrl-alt-del.target is masked.)

If the "ctrl-alt-del.target" Loaded: value is not set to "masked", this is a finding.
Fix Text (F-52257r833245_fix)
Configure the system to disable the Ctrl-Alt-Delete sequence for the command line with the following commands:

$ sudo systemctl disable ctrl-alt-del.target

$ sudo systemctl mask ctrl-alt-del.target

Created symlink /etc/systemd/system/ctrl-alt-del.target -> /dev/null

Reload the daemon to take effect:

$ sudo systemctl daemon-reload