STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 26 Mar 2026:

TOSS 5 must prevent a user from overriding the banner-message-enable setting for the graphical user interface.

DISA Rule

SV-282369r1200087_rule

Vulnerability Number

V-282369

Group Title

SRG-OS-000023-GPOS-00006

Rule Version

TOSS-05-000263

Severity

CAT II

CCI(s)

CCI-000048 - Display an organization-defined system use notification message or banner to users before granting access to the system that provides privacy and security notices consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidelines.
CCI-001384 - For publicly accessible systems, display system use information with organization-defined conditions before granting further access to the publicly accessible system.
CCI-001385 - For publicly accessible systems, displays references, if any, to monitoring that are consistent with privacy accommodations for such systems that generally prohibit those activities.
CCI-001386 - For publicly accessible systems, displays references, if any, to recording that are consistent with privacy accommodations for such systems that generally prohibit those activities.
CCI-001387 - For publicly accessible systems, displays references, if any, to auditing that are consistent with privacy accommodations for such systems that generally prohibit those activities.
CCI-001388 - For publicly accessible systems, includes a description of the authorized uses of the system.

Weight

Fix Recommendation

Configure TOSS 5 to prevent a user from overriding the banner setting for graphical user interfaces.

Create a database to contain the systemwide graphical user login settings (if it does not already exist) using the following command:

$ sudo touch /etc/dconf/db/local.d/locks/session

Add the following setting to prevent nonprivileged users from modifying it:

banner-message-enable

Update the database with the following command:

$ sudo dconf update

Check Contents

Verify TOSS 5 prevents a user from overriding settings for graphical user interfaces.

Note: This requirement assumes the use of the TOSS 5 default graphical user interface—the GNOME desktop environment. If the system does not have a graphical user interface installed, this requirement is not applicable.

Determine which profile the system database is using by running the following command:

$ sudo grep system-db /etc/dconf/profile/user

system-db:local

Verify the graphical settings are locked from nonprivileged user modification using the following command:

Note: The example below is using the database "local" for the system, so the path is "/etc/dconf/db/local.d". This path must be modified if a database other than "local" is being used.

$ sudo grep banner-message-enable /etc/dconf/db/local.d/*

/org/gnome/login-screen/banner-message-enable

If the output is not "/org/gnome/login-screen/banner-message-enable", the line is commented out, or the line is missing, this is a finding.

Vulnerability Number

V-282369

Documentable

False

Rule Version

TOSS-05-000263

Severity Override Guidance

Check Content Reference

Target Key

5738