STIGQter: STIG Summary: Riverbed NetIM OS Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 11 Sep 2025:

Ubuntu OS must retain a user's session lock until that user reestablishes access using established identification and authentication procedures.

DISA Rule

SV-275628r1147934_rule

Vulnerability Number

V-275628

Group Title

SRG-OS-000028-GPOS-00009

Rule Version

RIIM-OS-271020

Severity

CAT II

CCI(s)

• CCI-000056 - Retain the device lock until the user reestablishes access using established identification and authentication procedures.

Weight

10

Fix Recommendation

Configure Ubuntu OS to allow a user to lock the current graphical user interface session.

Create or edit a file named /etc/dconf/db/local.d/00-screensaver with the following contents:

[org/gnome/desktop/screensaver]
lock-enabled=true

Check Contents

Verify Ubuntu OS has a graphical user interface session lock enabled by using the following command:

Note: If no graphical user interface is installed, this requirement is not applicable.

$ sudo gsettings get org.gnome.desktop.screensaver lock-enabled
true

If "lock-enabled" is not set to "true", is commented out, or is missing, this is a finding.

Vulnerability Number

V-275628

Documentable

False

Rule Version

RIIM-OS-271020

Severity Override Guidance

Verify Ubuntu OS has a graphical user interface session lock enabled by using the following command:

Note: If no graphical user interface is installed, this requirement is not applicable.

$ sudo gsettings get org.gnome.desktop.screensaver lock-enabled
true

If "lock-enabled" is not set to "true", is commented out, or is missing, this is a finding.

Check Content Reference

M

Target Key

5706