Document Title:
===============
Facebook New Year Scraps - SQL Injection Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=274


Release Date:
=============
2011-10-27


Vulnerability Laboratory ID (VL-ID):
====================================
274


Product & Service Introduction:
===============================
The application is currently included and viewable by all facebook users.
The service is an external 3rd party application sponsored by the New Year Scraps Greeting Cards.

(Copy from the Vendors Homepage: http://apps.facebook.com/newyearscraps/)

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 3rd party web 
application - New Year Scraps Greeting Cards (apps.facebook.com).


Vulnerability Disclosure Timeline:
==================================
2011-09-17:	Vendor Notification
2011-09-18:	Vendor Response/Feedback
2011-09-18:	Developer Notification
2011-10-28:	Public or Non-Public Disclosure


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


Affected Product(s):
====================

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


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


Technical Details & Description:
================================
Multiple SQL Injection vulnerabilities are detected on the New Year Scraps Greeting Cards facebook application (apps.facebook).
The vulnerability allows  an attacker (remote) to inject/execute own sql statements on the affected fb application dbms.

Vulnerable Module(s): 
			                           [+] New Year Scraps Greeting Cards - Facebook 3rd Party Application

Vulnerable Param(s)/File(s): 
			                           [+] sent.php ; invite.php

Affected Application: 
			                           [+] http://apps.facebook.com/newyearscraps/


--- SQL Error Logs ---
Invalid query -- SELECT COUNT(*) FROM appusers WHERE userid = -- 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 -1`  at line 1
---
Invalid query -- SELECT COUNT(*) FROM gifts_log WHERE giftfrom = -- 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 -1` at line 1

			
Pictures:
						../1.png


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

URL:	http://apps.facebook.com/newyearscraps/
Path:	/newyearscraps/
File:	sent.php  & invite.php


Example:
http://[APP-SERVER]/[SERVICE-APP]/[FILE].[PHP]?=[x]


PoC:
http://apps.facebook.com/luchitas/sent.php?[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 - Benjamin Kunz Mejri (Rem0ve)


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