RHEL-09-271015 - RHEL 9 must prevent a user from overriding the banner-message-enable setting for the graphical user interface.

Information

Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance.

For U.S. Government systems, system use notifications are required only for access via login interfaces with human users and are not required when such human interfaces do not exist.

Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000228-GPOS-00088

Solution

Configure RHEL 9 to prevent a user from overriding the banner setting for graphical user interfaces.

Create a database to contain the system-wide graphical user logon settings (if it does not already exist) with 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

Run the following command to update the database:

$ sudo dconf update

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_RHEL_9_V2R1_STIG.zip

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-8a., 800-53|AC-8c.1., 800-53|AC-8c.2., 800-53|AC-8c.3., CAT|II, CCI|CCI-000048, CCI|CCI-001384, CCI|CCI-001385, CCI|CCI-001386, CCI|CCI-001387, CCI|CCI-001388, Rule-ID|SV-258013r958390_rule, STIG-ID|RHEL-09-271015, Vuln-ID|V-258013

Plugin: Unix

Control ID: b45fd8b25f21e638fc6eb83d651894da58c38e50c546f793cc6c7a8a0652384a