V-275629

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, a session lock of Ubuntu OS must remain in place until the user reauthenticates. No other activity aside from reauthentication must unlock the system.

Check Content

Verify Ubuntu OS has a graphical user interface session lock configured to activate after 15 minutes of inactivity by using the following commands:   
  
Note: If no graphical user interface is installed, this requirement is not applicable. 
 
Get the following settings to verify the graphical user interface session is configured to lock the graphical user session after 15 minutes of inactivity:  
   
     $ gsettings get org.gnome.desktop.screensaver lock-enabled 
     true 
 
     $ gsettings get org.gnome.desktop.screensaver lock-delay 
     uint32 0 
 
     $ gsettings get org.gnome.desktop.session idle-delay 
     uint32 900 
 
If "lock-enabled" is not set to "true", is commented out, or is missing, this is a finding. 
 
If "lock-delay" is set to a value greater than "0", or if "idle-delay" is set to a value greater than "900", is commented out, or is missing, this is a finding.