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OL 8 must disable the user list at logon for graphical user interfaces.


Finding ID Version Rule ID IA Controls Severity
V-248673 OL08-00-020032 SV-248673r779585_rule Medium
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.
Oracle Linux 8 Security Technical Implementation Guide 2022-12-06


Check Text ( C-52107r779583_chk )
Note: This requirement assumes the use of the OL 8 default graphical user interface, Gnome Shell. If the system does not have any graphical user interface installed, this requirement is Not Applicable.

Verify the operating system disables the user logon list for graphical user interfaces with the following command:

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

If the setting is "false", this is a finding.
Fix Text (F-52061r779584_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


Update the system databases:
$ sudo dconf update