Information
The operating system must not allow an unattended or automatic logon to the system via a graphical user interface.
Failure to restrict system unattended or automatic logon to the system negatively impacts operating system security.
Solution
Configure the operating system to not allow an unattended or automatic logon to the system via a graphical user interface.
Add or edit the line for the AutomaticLoginEnable parameter in the [daemon] section of the /etc/gdm/custom.conf file to false :
Example: vim /etc/gdm/custom.conf
[daemon]
AutomaticLoginEnable=false