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Ubuntu 22.04 LTS must disable the x86 Ctrl-Alt-Delete key sequence if a graphical user interface is installed.

An XCCDF Rule

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 environment, risk of unintentional reboot from the Ctrl-Alt-Delete sequence is reduced because the user will be prompted before any action is taken.

ID
SV-260539r991589_rule
Version
UBTU-22-271030
Severity
High
References
Updated

Remediation Templates

A Manual Procedure

Configure Ubuntu 22.04 LTS to disable the Ctrl-Alt-Delete sequence when using a graphical user interface. 
 
     $ gsettings set org.gnome.settings-daemon.plugins.media-keys logout [] 
 
Update the dconf settings: 
 
     # dconf update