Title

The Red Hat Enterprise Linux operating system must be configured so that the x86 Ctrl-Alt-Delete key sequence is disabled in the Graphical User Interface. (Cat I impact)

Discussion

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.

Check Content

Note: If the operating system does not have a graphical user interface installed, this requirement is Not Applicable. Verify the operating system is not configured to reboot the system when Ctrl-Alt-Delete is pressed. Check that the ctrl-alt-del.target is masked and not active in the graphical user interface with the following command: # grep logout /etc/dconf/db/local.d/* logout='' If "logout" is not set to use two single quotations, or is missing, this is a finding.

Fix Text

Configure the system to disable the Ctrl-Alt-Delete sequence for the graphical user interface with the following command: # touch /etc/dconf/db/local.d/00-disable-CAD Add the setting to disable the Ctrl-Alt-Delete sequence for the graphical user interface: [org/gnome/settings-daemon/plugins/media-keys] logout=''

Additional Identifiers

Rule ID: SV-204456r603261_rule

Vulnerability ID: V-204456

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

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