RE: Exploit/DoS in MS Internet Explorer 6.0 (OBJECT Tag)

From: Steve Ryan (argonat_private)
Date: Wed Apr 16 2003 - 15:22:47 PDT

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    I tried on Windows XP SP1 + all patches/hotfixes w/ IE 6 SP1 + all
patches/hotfixes and it seemed to work just fine.



-----Original Message-----
From: Ryan Emerle [mailto:securityFocusat_private] 
Sent: Wednesday, April 16, 2003 12:56 PM
To: bugtraqat_private
Subject: Exploit/DoS in MS Internet Explorer 6.0 (OBJECT Tag)



*Description*
Microsoft Internet Explorer 6.0 (other versions not tested) is
vulnerable 
to a DoS when specially crafted html is present on a page.  The 
vulnerability is in the processing of the OBJECT tag.

*Tested*
OS: Windows 2000 Pro SP3 (fully up-to-date)
IE: Internet Explorer 6.0.2800.1160 SP1

*Ramifications*
When the specially crafted HTML is present in a page, Internet Explorer 
will forcefully terminate all open sessions.  The client machine is 
otherwise unharmed. Further ramifications have not been investigated.

*Proof of Concept*
The following HTML code will cause the above version of Internet
Explorer 
to forcefully terminate:

<object id="test"
       data="#"
       width="100%" height="100%" 
       type="text/x-scriptlet" 
       VIEWASTEXT></object>

--
Ryan Emerle, BSCS
Lead Systems Developer
Interactive Network Systems, Inc.
http://www.ins-business.com

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