The x86 Ctrl-Alt-Delete key sequence in TOSS must be disabled if a graphical user interface is installed.
An XCCDF Rule
Description
<VulnDiscussion>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.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-252963r991589_rule
- Severity
- High
- References
- Updated
Remediation - Manual Procedure
Configure the system to disable the Ctrl-Alt-Delete sequence when using a graphical user interface by creating or editing the /etc/dconf/db/local.d/00-disable-CAD file.
Add the setting to disable the Ctrl-Alt-Delete sequence for a graphical user interface:
[org/gnome/settings-daemon/plugins/media-keys]
logout=''