Description

By default, DConf provides a standard user profile. This profile contains a list of DConf configuration databases. The user profile and database always take the highest priority. As such the DConf User profile should always exist and be configured correctly.

To make sure that the user profile is configured correctly, the /etc/dconf/profile/gdm should be set as follows:

user-db:user
system-db:gdm

Rationale

Failure to have a functional DConf profile prevents GNOME3 configuration settings from being enforced for all users and allows various security risks.

Remediation

Shell script

The following script can be run on the host to remediate the issue.

#!/bin/bash

# Remediation is applicable only in certain platforms
if dpkg-query --show --showformat='${db:Status-Status}\n' 'gdm3' 2>/dev/null | grep -q installed && { [ ! -f /.dockerenv ] && [ ! -f /run/.containerenv ]; }; then

echo -e 'user-db:user\nsystem-db:gdm' > /etc/dconf/profile/gdm

else
    >&2 echo 'Remediation is not applicable, nothing was done'
fi