Detections
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UBTU-22-271030 - Ubuntu 22.04 LTS must disable the x86 Ctrl-Alt-Delete key sequence if a graphical user interface is installed.
Information
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.Solution
Configure Ubuntu 22.04 LTS to disable the Ctrl-Alt-Delete sequence when using a graphical user interface.Create or edit a file named /etc/dconf/db/local.d/00-mediakeys with the following contents:
[org/gnome/settings-daemon/plugins/media-keys]
logout=@as []
Update the dconf settings:
$ sudo dconf update
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_CAN_Ubuntu_22-04_LTS_V2R8_STIG.zip
Item Details
Audit Name: DISA Canonical Ubuntu 22.04 LTS STIG v2r8
Category: CONFIGURATION MANAGEMENT
References: 800-53|CM-6b., CAT|I, CCI|CCI-000366, Rule-ID|SV-260539r1184066_rule, STIG-ID|UBTU-22-271030, Vuln-ID|V-260539
Plugin: Unix
Control ID: 8396164117d4afeaf0c2013e2b6bdf17c749de604bc31ed56f8d2c50615d0d5d