vSphere UI must not be configured with the "UserDatabaseRealm" enabled.

The vSphere UI performs user authentication at the application level and not through Tomcat. By default, there is no configuration for the "UserDatabaseRealm" Tomcat authentication mechanism. To eliminate unnecessary features and ensure the vSphere UI remains in its shipping state, the lack of a "UserDatabaseRealm" configuration must be confirmed.

At the command prompt, run the following command:

# grep UserDatabaseRealm /usr/lib/vmware-vsphere-ui/server/conf/server.xml 

If the command produces any output, this is a finding.

Navigate to and open:

/usr/lib/vmware-vsphere-ui/server/conf/server.xml

Remove all <Realm> nodes.

Restart the service with the following command:

# vmon-cli --restart vsphere-ui