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V-282757

CAT I (High)

TOSS 5 must not allow an unattended or automatic logon to the system.

Rule ID

SV-282757r1201251_rule

STIG

Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000366

Discussion

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

Check Content

Verify TOSS 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 default graphical user interface, Gnome Shell. 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:

$ sudo grep -i automaticloginenable /etc/gdm/custom.conf
AutomaticLoginEnable=false

Automatic logon as an authorized user allows access to any user with physical access to the operating system.

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

Fix Text

Configure TOSS 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":

[daemon]
AutomaticLoginEnable=false