Title

The Red Hat Enterprise Linux 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 must remain in place until the user reauthenticates. No other activity aside from reauthentication must unlock the system. Satisfies: SRG-OS-000028-GPOS-00009, SRG-OS-000030-GPOS-00011

Check Content

Verify the operating system enables a user's session lock until that user re-establishes access using established identification and authentication procedures. Note: If the system does not have GNOME installed, this requirement is Not Applicable. Check to see if the screen lock is enabled with the following command: # grep -ir lock-enabled /etc/dconf/db/local.d/ | grep -v locks lock-enabled=true If the "lock-enabled" setting is missing or is not set to "true", this is a finding.

Fix Text

Configure the operating system to enable a user's session lock until that user re-establishes access using established identification and authentication procedures. Create a database to contain the system-wide screensaver settings (if it does not already exist) with the following example: # touch /etc/dconf/db/local.d/00-screensaver Edit the "[org/gnome/desktop/screensaver]" section of the database file and add or update the following lines: # Set this to true to lock the screen when the screensaver activates lock-enabled=true Update the system databases: # dconf update Users must log out and back in again before the system-wide settings take effect.

Additional Identifiers

Rule ID: SV-204396r880746_rule

Vulnerability ID: V-204396

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

Expert Comments

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