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UBTU-22-271025 Ubuntu 22.04 LTS must initiate a graphical session lock after 10 minutes of inactivity.

DISA STIG library V2R10
All changes in this version
first version loaded CAT II

Maps to AC-11 via CCI-000057

Title

Ubuntu 22.04 LTS must initiate a graphical session lock after 10 minutes of inactivity.

Control

Note: If no graphical user interface is installed, this requirement is not applicable. Verify Ubuntu 22.04 LTS has a graphical user interface session lock configured to activate after 10 minutes of inactivity by using the following commands: Get the following settings to verify the graphical user interface session is configured to lock the graphical user session after 10 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 600 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 "600", is commented out, or is missing, this is a finding.

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 22.04 LTS must remain in place until the user reauthenticates. No other activity aside from reauthentication must unlock the system.

Related controls

CCI-000057

Fix

Configure Ubuntu 22.04 LTS to lock the current graphical user interface session after 10 minutes of inactivity. Create or edit a file named "/etc/dconf/db/local.d/00-screensaver" with the following contents: [org/gnome/desktop/screensaver] lock-enabled=true lock-delay=0 [org/gnome/desktop/session] idle-delay=600