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V-281287

CAT II (Medium)

RHEL 10 must disable the user list at login for graphical user interfaces.

Rule ID

SV-281287r1166813_rule

STIG

Red Hat Enterprise Linux 10 Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000381

Discussion

Leaving the user list enabled is a security risk because it allows anyone with physical access to the system to enumerate known user accounts without authenticated access to the system.

Check Content

Note: This requirement assumes the use of the RHEL 10 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is not applicable.

Verify RHEL 10 disables the user login list for graphical user interfaces with the following command:

$ gsettings get org.gnome.login-screen disable-user-list
true

If the setting is "false", this is a finding.

Fix Text

Configure RHEL 10 to disable the user list at login for graphical user interfaces.

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.

Create a database to contain the systemwide screensaver settings (if it does not already exist) with the following command:

$ sudo vi /etc/dconf/db/local.d/02-login-screen

[org/gnome/login-screen]
disable-user-list=true

Update the system databases:

$ sudo dconf update