XFree86 3.3.x and 4.0 allows a user to cause a denial of service via a negative counter value in a malformed TCP packet that is sent to port 6000.Referenceshttp://archives.neohapsis.com/archives/bugtraq/2000-05/0223.htmlhttp://www.securityfocus.com/bid/1235ftp://ftp.caldera.com/pub/security/OpenLinux/CSSA-2000-012.0.txt
