The Java Plug-in 1.4.2_03 and 1.4.2_04 controls, and the 1.4.2_03 and 1.4.2_04 <applet> redirector controls, allow remote attackers to cause a denial of service (Internet Explorer crash) by creating a COM object of the class associated with the control's CLSID, which is not intended for use within Internet Explorer.