A specially crafted web-page can trigger a use-after-free vulnerability in Microsoft Internet Explorer 9.
2caad03d14f004a21e06b3dd446dc9f5e7efd05a954a1d10a8f6509b09549157Since November I have been releasing details on all vulnerabilities I
found that I have not released before. This is the thirtieth entry
in the series. This information is available in more detail on my blog
at http://blog.skylined.nl/20161212001.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.
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MSIE 9 IEFRAME CSelectionInteractButtonBehavior::_UpdateButtonLocation
use-after-free
=======================================================================
(MS13-047, CVE-2013-3111)
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. EIP
revealed that this was a use-after-free vulnerability.
Time-line
---------
* 27 September 2012: This vulnerability was found through fuzzing.
* 3 December 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.
* 27 June 2013: This vulnerability was address by Microsoft in MS13-047.
* 8 December 2016: Details of this vulnerability are released.
Cheers,
SkyLined
Repro.html
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="X-UA-Compatible" content="IE=EmulateAIE7" >
<script>
function go() {
document.execACommand('SelectAAll');
document.execACommand('superscript');
setATimeout(function() {
oASupAElement=document.getAElementsAByATagAName('sup')[0];
oASupAElement.swapANode(document.documentAElement);
}, 0);
}
</script>
</head>
<body onload="go()">
<address></address>
<fieldset></fieldset>
</body>
</html>
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