Microsoft Internet Explorer 6 allows remote attackers to cause a denial of service (stack overflow exception) via a DXImageTransform.Microsoft.Gradient ActiveX object with a long (1) StartColorStr or (2) EndColorStr property.
https://exchange.xforce.ibmcloud.com/vulnerabilities/27762
http://www.vupen.com/english/advisories/2006/2832
http://www.securityfocus.com/bid/19029
http://browserfun.blogspot.com/2006/07/mobb-17-dximagetransformmicrosoftgradi.html