IBM DB2 UDB 8.1 before FixPak 16, 8.2 before FixPak 9, and 9.1 before FixPak 4a allows remote attackers to cause a denial of service (instance crash) via a crafted SQLJRA packet within a CONNECT/ATTACH data stream that simulates a V7 client connect/attach request.
https://exchange.xforce.ibmcloud.com/vulnerabilities/45134
http://www.appsecinc.com/resources/alerts/db2/2008-01.shtml