TOSS 5 must not allow unattended or automatic logon via the graphical user interface.

Failure to restrict system access to authenticated users negatively impacts operating system security.

Verify TOSS 5 does not allow an unattended or automatic logon to the system via a graphical user interface.

Note: This requirement assumes the use of the TOSS 5 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is not applicable.

Check for the value of the "AutomaticLoginEnable" in the "/etc/gdm/custom.conf" file using the following command:

$ grep -i automaticlogin /etc/gdm/custom.conf

[daemon] AutomaticLoginEnable=false

If the value of "AutomaticLoginEnable" is not set to "false", this is a finding.

Configure the GNOME desktop display manager to disable automatic login.

Set "AutomaticLoginEnable" to "false" in the [daemon] section in "/etc/gdm/custom.conf". For example:

[daemon] AutomaticLoginEnable=false