IBM DB2 9.7 through FP10, 9.8 through FP5, 10.1 through FP4, and 10.5 before FP5 on Linux, UNIX, and Windows allows remote authenticated users to cause a denial of service (daemon crash) by specifying the same column within multiple ALTER TABLE statements.
https://exchange.xforce.ibmcloud.com/vulnerabilities/98685
http://www.securitytracker.com/id/1034572
http://www.securityfocus.com/bid/71730
http://www-01.ibm.com/support/docview.wss?uid=swg21693197
http://www-01.ibm.com/support/docview.wss?uid=swg21690891
http://www-01.ibm.com/support/docview.wss?uid=swg1IT05652
http://www-01.ibm.com/support/docview.wss?uid=swg1IT05651
http://www-01.ibm.com/support/docview.wss?uid=swg1IT04138