The SVG component in Mozilla Firefox 3.0.4 allows remote attackers to cause a denial of service (application hang) via a large value in the r (aka Radius) attribute of a circle element, related to an "unclamped loop."
https://www.exploit-db.com/exploits/8794
https://exchange.xforce.ibmcloud.com/vulnerabilities/50721
http://www.securityfocus.com/archive/1/503825/100/0/threaded
http://blog.zoller.lu/2009/04/advisory-firefox-dos-condition.html
http://archives.neohapsis.com/archives/bugtraq/2009-05/0272.html
http://archives.neohapsis.com/archives/bugtraq/2009-05/0270.html