The BasicService in Sun Java Web Start allows remote attackers to execute arbitrary programs on a client machine via a file:// URL argument to the showDocument method.
https://exchange.xforce.ibmcloud.com/vulnerabilities/46119
http://www.securityfocus.com/bid/31916
http://www.securityfocus.com/archive/1/497972/100/0/threaded
http://www.securityfocus.com/archive/1/497799/100/0/threaded