Detections
Analytics
RHEL-09-271115 - RHEL 9 must disable the user list at logon for graphical user interfaces.
Information
Leaving the user list enabled is a security risk since it allows anyone with physical access to the system to enumerate known user accounts without authenticated access to the system.Solution
Configure RHEL 9 to disable the user list at logon for graphical user interfaces.Create a database to contain the systemwide screensaver settings (if it does not already exist) with the following command:
Note: The example below is using the database "local" for the system. If the system is using another database in "/etc/dconf/profile/user", the file should be created under the appropriate subdirectory.
$ sudo touch /etc/dconf/db/local.d/02-login-screen
[org/gnome/login-screen]
disable-user-list=true
Update the system databases:
$ sudo dconf update
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_RHEL_9_V2R9_STIG.zip
Item Details
Audit Name: DISA Red Hat Enterprise Linux 9 STIG v2r9
Category: CONFIGURATION MANAGEMENT
References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-258033r1045120_rule, STIG-ID|RHEL-09-271115, Vuln-ID|V-258033
Plugin: Unix
Control ID: 97a447d5a757a12925d857287f9ac038f16afee3f0ba1aaa1e88569a11f5f7b3