Java 1.4.2 before 1.4.2 Release 2 on Apple Mac OS X does not prevent multiple programs from opening the same port as a Java ServerSocket, which allows local users to operate a Java program that intercepts network data intended for the ServerSocket of a different Java program.
https://exchange.xforce.ibmcloud.com/vulnerabilities/22269
http://www.vupen.com/english/advisories/2005/1734
http://www.securityfocus.com/bid/14827
http://www.ciac.org/ciac/bulletins/p-306.shtml
http://secunia.com/advisories/16808
http://lists.apple.com/archives/security-announce/2005/Sep/msg00001.html