Facebook Chartity (TAG) - SQL Injection Vulnerability

Document Title:
===============
Facebook Chartity (TAG) - SQL Injection Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=336


Release Date:
=============
2011-12-04


Vulnerability Laboratory ID (VL-ID):
====================================
336


Common Vulnerability Scoring System:
====================================
7.5


Product & Service Introduction:
===============================
The application is currently included and viewable by all facebook charity users.
The service is a not external located application sponsored by the Facebook Chartity (TAG) Development Team.

(Copy from the Vendors Homepage: http://www.facebook.com/TAG)

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)


Abstract Advisory Information:
==============================
Vulnerability-Lab researcher discovered a remote SQL Injection vulnerability on the Facebooks Chartity (TAG) application.


Vulnerability Disclosure Timeline:
==================================
2011-11-22:	Vendor Notification
2011-11-22:	Vendor Response/Feedback
2011-11-23:	Developer Notification
2011-12-05:	Public or Non-Public Disclosure


Discovery Status:
=================
Published


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


Severity Level:
===============
High


Technical Details & Description:
================================
A SQL Injection vulnerability is detected on the Facebooks Charity Contest (TAG) appliccation/service.
The vulnerability allows an attacker (remote) to inject/execute own sql statements on the affected fb application dbms.

Vulnerable Module(s): 
			                            [+] Facebooks Chartity (TAG)

Vulnerable Param(s)/File(s): 
			                            [+] INDEX (Charity ConTest) - models/video.php

Affected Application: 
			                            [+] facebook.com/TAG


--- SQL Error Logs ---
Information: A PHP Error was encountered
Severity: Notice
Message: Trying to get property of non-object
Filename: models/video.php
Line Number: 17 - A Database Error Occurred
Error Number: 1064

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax 
to use near \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'and s.deleted = 0 and v.deleted = 0 ORDER BY `s`.`id` asc LIMIT 5\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\' at line 5

SELECT `v`.*, `s`.`is_approved`, `s`.`is_winnable`, `s`.`total_votes`, `s`.`total_views`, `s`.`total_comments`, `s`.`is_can_vote`
, `s`.`is_can_comment`, `s`.`created`, `s`.`prom_id`, `s`.`user_id`, `s`.`deleted`, `u`.`email`, `u`.`facebook_id`, `u`.`first_name`
, `u`.`last_name`, `s`.`round_id` FROM (`submissions` s inner join videos v on s.id = v.submission_id inner join users u on u.id = 
s.user_id) WHERE `s`.`prom_id` = 23 and s.round_id = and s.deleted = 0 and v.deleted = 0 ORDER BY `s`.`id` asc LIMIT 5

	
		
Picture(s):
						../1.png


Proof of Concept (PoC):
=======================
The vulnerability can be exploited by remote attackers. For demonstration or reproduce ...

URL:	http://www.facebook.com/TAG
Path:	/TAG/
Module:	Charity Contest

Example:
http://[FACEBOOK]/[SERVICE]/[FILE]?=[SQL Injection]


PoC:
http://www.facebook.com/TAG?[PARAM]=[SQL-Injection]


Solution - Fix & Patch:
=======================
Use the prepared statement class to fix the sql injection vulnerability & filter sql error requests.
Set error(0) to prevent against information disclosure via exceptions or error reports.


Security Risk:
==============
The security risk of the application sql injection vulnerabilities are estimated as high(+).


Credits & Authors:
==================
Vulnerability Research Laboratory - Ucha Gobejishvili (longrifle0x) 


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=========================
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