The SUSE operating system must disable the x86 Ctrl-Alt-Delete key sequence for Graphical User Interfaces.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-234989 | SLES-15-040061 | SV-234989r991589_rule | CCI-000366 | high |
| 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 user interface environment, risk of unintentional reboot from the Ctrl-Alt-Delete sequence is reduced because the user will be prompted before any action is taken. | ||||
| STIG | Date | |||
| SUSE Linux Enterprise Server 15 Security Technical Implementation Guide | 2025-05-14 | |||
Details
Check Text (C-234989r991589_chk)
Note: If a graphical user interface is not installed, this requirement is Not Applicable.
Verify the SUSE operating system is not configured to reboot the system
when Ctrl-Alt-Delete is pressed in the graphical user interface.
Check that the dconf setting was disabled to allow the Ctrl-Alt-Delete
sequence in the graphical user interface with the following command:
Check the default logout key sequence:
> sudo gsettings get org.gnome.settings-daemon.plugins.media-keys logout
['']
Check that the value is not writable and cannot be changed by the user:
> sudo gsettings writable org.gnome.settings-daemon.plugins.media-keys logout
false
If the logout value is not [''] and the writable status is not false, this
is a finding.
Fix Text (F-38140r619237_fix)
Configure the system to disable the Ctrl-Alt-Delete sequence for the
graphical user interface.
Create a database to contain the system-wide setting (if it does not
already exist) with the following steps:
1. Create a user profile and with the listed content:
/etc/dconf/profile/user
user-db:user
system-db:local
2. Create the following directories:
> sudo mkdir -p /etc/dconf/db/local.d/
> sudo mkdir -p /etc/dconf/db/local.d/locks/
3. Add the following files with the listed content:
/etc/dconf/db/local.d/01-fips-settings
[org/gnome/settings-daemon/plugins/media-keys]
logout=['']
/etc/dconf/db/local.d/locks/01-fips-locks
/org/gnome/settings-daemon/plugins/media-keys/logout
4. Update the dconf database:
> sudo dconf update