[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Full-disclosure] Paypal Bug Bounty #20 - Persistent Web Vulnerabilities
- To: full-disclosure@xxxxxxxxxxxxxxxxx
- Subject: [Full-disclosure] Paypal Bug Bounty #20 - Persistent Web Vulnerabilities
- From: Vulnerability Lab <research@xxxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 04 Feb 2013 17:08:24 +0100
Title:
======
Paypal Bug Bounty #20 - Persistent Web Vulnerabilities
Date:
=====
2013-01-25
References:
===========
http://www.vulnerability-lab.com/get_content.php?id=682
PayPal UID: fxv444khi
VL-ID:
=====
682
Common Vulnerability Scoring System:
====================================
3.5
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 4ñ9, 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 Homepage: www.paypal.com) [http://en.wikipedia.org/wiki/PayPal]
Abstract:
=========
The Vulnerability Laboratory Research Team discovered a Web Vulnerability in
Paypal Labs Fundraising Widget Web Application.
Report-Timeline:
================
2012-08-13: Researcher Notification & Coordination
2012-08-14: Vendor Notification
2012-09-13: Vendor Response/Feedback
2013-01-12: Vendor Fix/Patch (PayPal Inc)
2013-01-25: Public Disclosure
Status:
========
Published
Exploitation-Technique:
=======================
Remote
Severity:
=========
Medium
Details:
========
Multiple persistent input validation vulnerabilities are detected in Paypal
Labs Fundraising Widget. The bugs allow remote attackers
to implement/inject malicious script code on the application side (persistent).
The persistent vulnerabilities are located in the Generate Widgets module with
the bound vulnerable your name, your website,
image url and supporters parameter listing. Attackers can inject own malicious
script code as name, website url, image url or as
supporter link to generate evil fundraising widgets. The execution of the
script code occurs in the main listing out of the account
index or the generated widget file output listing.
Exploitation requires low user interaction or low privileged application user
account. Successful exploitation of the vulnerability leads
to persistent session hijacking (admin/mod/customer), account steal via
persistent web attack or stable (persistent) context manipulation.
Vulnerable Service(s):
[+] Fundraising Widgets
[https://giving.paypallabs.com/]
Vulnerable Module(s):
[+] Generate Widgets
Vulnerable Parameter(s):
[+] your name
[+] your website
[+] image url
[+] supporters
Affected Section(s):
[+] Giving PaypalLabs Account Index
[+] Generated widget output file
Proof of Concept:
=================
The persistent web vulnerabilities can be exploited by remote attackers with
low privileged application user account and with low or medium
required user inter action. For demonstration or reproduce ...
Session:
https://giving.paypallabs.com/authenticate/myaccount?token=HA-CYR26UHWRK8CS
Time: 17:58 - 18:10 (EU) 2012-08-13
Review: Your giving widgets - Account Index
<tr>
<td height="20" width="20"><img src="myaccount-Dateien/spacer.gif" height="1"
width="20"></td>
<td align="left" height="20" valign="top" width="10"><img
src="myaccount-Dateien/dot.gif" height="7" width="2"></td>
<td class="gap" title="-1' " align="left" height="20" width="110"><[PERSISTENT
INJECTED SCRIPT CODE!]")' <"=""><a
href="/authenticate/view_campaign?campaign=38284">-1'
"><[PERSISTENT INJECTED SCRIPT CODE!]") <</a></td>
<td width="20" height="20"><img
src="/images/spacer.gif" width="20" height="1" /></td>
</tr>
Review: Review Badge - Link
<a name='b_60df8340c78b012fbb8a000d60d4c902'></a><object
type='application/x-shockwave-flash'
data='https://giving.paypallabs.com/flash/badge.swf'
width='205' height='350' id='badge60df8340c78b012fbb8a000d60d4c902'
align='middle'>
<param name='allowScriptAccess' value='always' />
<param name='allowNetworking' value='all' />
<param name='movie' value='https://giving.paypallabs.com/flash/badge.swf' />
<param name='quality' value='high' />
<param name='bgcolor' value='#FFFFFF' />
<param name='wmode' value='transparent' />
<param name='FlashVars' value='Id=60df8340c78b012fbb8a000d60d4c902'/>
<embed src='https://giving.paypallabs.com/flash/badge.swf'
FlashVars='Id=60df8340c78b012fbb8a000d60d4c902'
quality='high' bgcolor='#FFFFFF' wmode='transparent' width='205' height='350'
Id='badge60df8340c78b012fbb8a000d60d4c902' align='middle'
allowScriptAccess='always' allowNetworking='all'
type='application/x-shockwave-flash'
pluginspage='http://www.macromedia.com/go/getflashplayer'></embed>
</object>
Risk:
=====
The security risk of the persistent script code inject vulnerability is
estimated as medium(+).
Credits:
========
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri
(bkm@xxxxxxxxxxxxxxxxxxxxx)
Disclaimer:
===========
The information provided in this advisory is provided as it is without any
warranty. Vulnerability-Lab disclaims all warranties,
either expressed or implied, including the warranties of merchantability and
capability for a particular purpose. Vulnerability-
Lab or its suppliers are not liable in any case of damage, including direct,
indirect, incidental, consequential loss of business
profits or special damages, even if Vulnerability-Lab or its suppliers have
been advised of the possibility of such damages. Some
states do not allow the exclusion or limitation of liability for consequential
or incidental damages so the foregoing limitation
may not apply. We do not approve or encourage anybody to break any vendor
licenses, policies, deface websites, hack into databases
or trade with fraud/stolen material.
Domains: www.vulnerability-lab.com - www.vuln-lab.com
- www.vulnerability-lab.com/register
Contact: admin@xxxxxxxxxxxxxxxxxxxxx - support@xxxxxxxxxxxxxxxxxxxxx
- research@xxxxxxxxxxxxxxxxxxxxx
Section: video.vulnerability-lab.com - forum.vulnerability-lab.com
- news.vulnerability-lab.com
Social: twitter.com/#!/vuln_lab - facebook.com/VulnerabilityLab
- youtube.com/user/vulnerability0lab
Feeds: vulnerability-lab.com/rss/rss.php -
vulnerability-lab.com/rss/rss_upcoming.php -
vulnerability-lab.com/rss/rss_news.php
Any modified copy or reproduction, including partially usages, of this file
requires authorization from Vulnerability Laboratory.
Permission to electronically redistribute this alert in its unmodified form is
granted. All other rights, including the use of other
media, are reserved by Vulnerability-Lab Research Team or its suppliers. All
pictures, texts, advisories, sourcecode, videos and
other information on this website is trademark of vulnerability-lab team & the
specific authors or managers. To record, list (feed),
modify, use or edit our material contact (admin@xxxxxxxxxxxxxxxxxxxxx or
support@xxxxxxxxxxxxxxxxxxxxx) to get a permission.
Copyright © 2012 | Vulnerability
Laboratory
--
VULNERABILITY RESEARCH LABORATORY
LABORATORY RESEARCH TEAM
CONTACT: research@xxxxxxxxxxxxxxxxxxxxx
_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/