Title

The Ubuntu operating system must enable a user session lock until that user re-establishes access using established identification and authentication procedures. (Cat II impact)

Discussion

A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented at the point where session activity can be determined. Regardless of where the session lock is determined and implemented, once invoked, the session lock shall remain in place until the user re-authenticates. No other activity aside from re-authentication shall unlock the system.

Check Content

Verify the operating system allows a user to lock the current graphical user interface session. Note: If the Ubuntu operating system does not have a graphical user interface installed, this requirement is Not Applicable. Check to see if the Ubuntu operating system allows the user to lock the current graphical user interface session with the following command: # gsettings get org.gnome.desktop.lock-enabled true If "lock-enabled" is not set to "true", this is a finding.

Fix Text

Configure the Ubuntu operating system so that it allows a user to lock the current Graphical User Interface session. Set the "lock-enabled" setting in the graphical user interface to allow session locks with the following command: Note: The command must be performed from a terminal window inside the graphical user interface. # sudo gsettings set org.gnome.desktop.lock-enabled true

Additional Identifiers

Rule ID: SV-214943r610931_rule

Vulnerability ID: V-214943

Group Title: SRG-OS-000028-GPOS-00009

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.