The SUSE operating system must disable the x86 Ctrl-Alt-Delete key sequence for Graphical User Interfaces.

An XCCDF Rule

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 GNOME 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.

ID: SV-217160r991589_rule
Version: SLES-12-010611
Severity: High
References: CCI-000366
Updated: about 2 months ago

Remediation Templates

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

The SUSE operating system must disable the x86 Ctrl-Alt-Delete key sequence for Graphical User Interfaces.

Description

Remediation Templates

A Manual Procedure