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OL 8 must disable the systemd Ctrl-Alt-Delete burst key sequence.


Finding ID Version Rule ID IA Controls Severity
V-248871 OL08-00-040172 SV-248871r780179_rule Medium
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.
Oracle Linux 8 Security Technical Implementation Guide 2022-12-06


Check Text ( C-52305r780177_chk )
Verify OL 8 is not configured to reboot the system when Ctrl-Alt-Delete is pressed seven times within two seconds with the following command:

$ sudo grep -i ctrl /etc/systemd/system.conf


If the "CtrlAltDelBurstAction" is not set to "none" or is commented out or missing, this is a finding.
Fix Text (F-52259r780178_fix)
Configure the system to disable the CtrlAltDelBurstAction by added or modifying the following line in the "/etc/systemd/system.conf" configuration file:


Reload the daemon for this change to take effect:

$ sudo systemctl daemon-reload