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Microsoft Internet Explorer 9 IEFRAME CMarkup..RemovePointerPos Use-After-Free

Microsoft Internet Explorer 9 IEFRAME CMarkup..RemovePointerPos Use-After-Free
Posted Dec 15, 2016
Authored by SkyLined

Microsoft Internet Explorer 9 suffers from an IEFRAME CMarkup..RemovePointerPos use-after-free vulnerability.

tags | exploit
advisories | CVE-2013-3143
SHA-256 | 634d8d94a12d60ded007a6b665b6c620bb8e0b39af116a7c06ea2a618e27cd38

Microsoft Internet Explorer 9 IEFRAME CMarkup..RemovePointerPos Use-After-Free

Change Mirror Download
Since November I have been releasing details on all vulnerabilities I
found that I have not released before. This is the 32nd entry in the
series. This information is available in more detail on my blog at
http://blog.skylined.nl/20161214001.html. There you can find a repro
that triggered this issue in addition to the information below.

If you find these releases useful, and would like to help me make time
to continue releasing this kind of information, you can make a donation
in bitcoin to 183yyxa9s1s1f7JBpAPHPmzAQ346y91Rx5DX.

Follow me on http://twitter.com/berendjanwever for daily browser bugs.

MSIE 9 IEFRAME CMarkup..RemovePointerPos use-after-free
=======================================================
(MS13-055, CVE-2013-3143)

Synopsis
--------
A specially crafted web-page can trigger a use-after-free vulnerability
in Microsoft Internet Explorer 9. I did not investigate this
vulnerability thoroughly, so I cannot speculate on the potential impact
or exploitability.

Known affected software and attack vectors
------------------------------------------
* **Microsoft Internet Explorer 9**

An attacker would need to get a target user to open a specially
crafted web-page. Disabling JavaScript should prevent an attacker
from triggering the vulnerable code path.

Details
-------
This bug was found back when I had very little knowledge and tools to do
analysis on use-after-free bugs, so I have no details to share. ZDI
revealed that this was a use-after-free vulnerability, though their
advisory (at http://www.zerodayinitiative.com/advisories/ZDI-13-163/)
mentions an iframe, which is not in the repro I provided.

Time-line
---------
* Sometime in November 2012: This vulnerability was found through fuzzing.
* 11 November 2012: This vulnerability was submitted to EIP.
* 10 December 2012: This vulnerability was rejected by EIP.
* 12 December 2012: This vulnerability was submitted to ZDI.
* 25 January 2013: This vulnerability was acquired by ZDI.
* 15 February 2013: This vulnerability was disclosed to Microsoft by
ZDI.
* 26 July 2013: This vulnerability was address by Microsoft in MS13-055.
* 14 December 2016: Details of this vulnerability are released.

Cheers,

SkyLined


Repro.html

<!DOCTYPE html>
<html>
<script>
document.addAEventAListener("load", function (){
document.documentAElement.removeANode(true);
}, true);
document.addAEventAListener("DOMNodeARemoved", function (){
document.write("");
}, true);
</script>
<style>
</style>
<span dir="rtl">
<ruby dir="ltr">
<br/>
</ruby>
</span>
</html>

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