Detections
Analytics

SLES-12-010611 - The SUSE operating system must disable the x86 Ctrl-Alt-Delete key sequence for Graphical User Interfaces.

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 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.

Solution

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

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_SLES_12_V3R4_STIG.zip

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CAT|I, CCI|CCI-000366, Rule-ID|SV-217160r991589_rule, STIG-ID|SLES-12-010611, STIG-Legacy|SV-108091, STIG-Legacy|V-98987, Vuln-ID|V-217160

Plugin: Unix

Control ID: d81a90bfbffd19aee9cd7c2cc8030d05f858ba9bf663950a9914a0b13e4f8d6c