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RHEL-08-040171 - The x86 Ctrl-Alt-Delete key sequence in RHEL 8 must be disabled 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 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.Solution
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=''
Note: The value above is set to two single quotations.
Then update the dconf settings:
$ sudo dconf update
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_RHEL_8_V2R7_STIG.zip
Item Details
Audit Name: DISA Red Hat Enterprise Linux 8 STIG v2r7
Category: CONFIGURATION MANAGEMENT
References: 800-53|CM-6b., CAT|I, CCI|CCI-000366, Rule-ID|SV-230530r1069317_rule, STIG-ID|RHEL-08-040171, Vuln-ID|V-230530
Plugin: Unix
Control ID: 46eef62d937cc57ed2ae643132b32767406405eb25dbafdf287ac7c3e7633651