Buffer overflow in the TCP/IP listener in IBM DB2 Universal Database (UDB) before 8.1 FixPak 12 allows remote attackers to cause a denial of service (application crash) via a long MGRLVLLS message inside of an EXCSAT message when establishing a connection.
http://www.vupen.com/english/advisories/2006/2332
http://www.securityfocus.com/bid/18428
http://www.securityfocus.com/archive/1/445297/100/0/threaded