RHEL 8 must disable the user list at logon for graphical user interfaces.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-244536 | RHEL-08-020032 | SV-244536r1017343_rule | CCI-000366 | medium |
| Description | ||||
| 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. | ||||
| STIG | Date | |||
| Red Hat Enterprise Linux 8 Security Technical Implementation Guide | 2025-05-14 | |||
Details
Check Text (C-244536r1017343_chk)
Verify the operating system disables the user logon list for graphical user interfaces with the following command:
Note: This requirement assumes the use of the RHEL 8 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.login-screen disable-user-list
true
If the setting is "false", this is a finding.
Fix Text (F-47768r743856_fix)
Configure the operating system to disable the user list at logon for graphical user interfaces.
Create a database to contain the system-wide screensaver settings (if it does not already exist) with the following command:
Note: The example below is using the database "local" for the system, so 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