Vulnerability Discussion

Internet services that are not required for system or application processes must not be active to decrease the attack surface of the system. X Windows has a long history of security vulnerabilities and will not be used unless approved and documented.

Check

Verify that if the system has a display server installed, it is authorized.

Check for the display server package with the following example command:

$ sudo rpm -qa | grep xorg | grep server

Ask the System Administrator if use of the display server is an operational requirement.

If the use of a display server on the system is not documented with the Information System Security Officer (ISSO), this is a finding.

Fix

Document the requirement for a display server with the ISSO or remove the related packages with the following example command:

$ sudo rpm -e xorg-x11-server-common