IBM Informix Dynamic Server (IDS) 10.00 before 10.00.xC11, 11.10 before 11.10.xC4, and 11.50 before 11.50.xC5 allows remote attackers to cause a denial of service (memory corruption, assertion failure, and daemon crash) by sending a long password over a JDBC connection.
http://www.vupen.com/english/advisories/2009/2786
http://www.securitytracker.com/id?1022955
http://www.securityfocus.com/bid/36538