IBM WebSphere Application Server Hash Collision Denial of Service Vulnerability

A vulnerability has been identified in IBM WebSphere Application Server, which can be exploited by malicious people to cause a DoS (Denial of Service).  The vulnerability is caused due to an error within a hash generation function when hashing form posts and updating a hash table. This can be exploited to cause a hash collision resulting in high CPU consumption via a specially crafted form sent in a HTTP POST request.