Internet Explorer 6 on Windows XP allows remote attackers to cause a denial of service (crash) by setting the Enabled property of a DXTFilter ActiveX object to true, which triggers a null dereference.Referenceshttps://exchange.xforce.ibmcloud.com/vulnerabilities/27623http://www.securityfocus.com/bid/18903http://www.vupen.com/english/advisories/2006/2732http://www.osvdb.org/27014