X11 Server Unauthenticated Access Open Vulnerability CVE-1999-0526

Issue

• Is my Red Hat Enterprise Linux OS affected with Vulnerability described in CVE-1999-0526?
• The remote X11 server accepts connection from anywhere.
• An attacker may connect to it to eavesdrop on the keyboard and mouse events of a user on the remote host.
• It is even possible for an attacker to grab a screenshot of the remote host or to display arbitrary programs.
• An attacker may exploit this flaw to obtain the username and password of a user on the remote host.