Check: TOSS-04-020020
Tri-Lab Operating System Stack (TOSS) 4 STIG:
TOSS-04-020020
(in versions v2 r1 through v1 r1)
Title
TOSS must retain a user's session lock until that user reestablishes 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. Satisfies: SRG-OS-000028-GPOS-00009, SRG-OS-000030-GPOS-00011, SRG-OS-000031-GPOS-00012
Check Content
Verify TOSS retains a user's session lock until that user reestablishes access using established identification and authentication procedures with the following command: 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. $ sudo gsettings get org.gnome.desktop.screensaver lock-enabled true If the setting is "false", this is a finding.
Fix Text
Configure TOSS to retain a user's session lock until that user reestablishes 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: $ sudo vi /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: $ sudo dconf update
Additional Identifiers
Rule ID: SV-252948r986582_rule
Vulnerability ID: V-252948
Group Title: SRG-OS-000028-GPOS-00009
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000056 |
Retain the device lock until the user reestablishes access using established identification and authentication procedures. |
| CCI-000057 |
Prevent further access to the system by initiating a device lock after organization-defined time period of inactivity; and/or requiring the user to initiate a device lock before leaving the system unattended. |
| CCI-000060 |
Conceal, via the device lock, information previously visible on the display with a publicly viewable image. |