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Paypal Bug Bounty #46 - Persistent Web Vulnerability
From: Vulnerability Lab <research () vulnerability-lab com>
Date: Thu, 28 Mar 2013 22:20:51 +0100
Paypal Bug Bounty #46 - Persistent Web Vulnerability
PayPal Security UID: esj1f86plc
Common Vulnerability Scoring System:
PayPal offers, both companies and individuals, a simple, quick and innovative solution of receiving money and making
In ten years time, this company has become an authority in this market. Online buyers, eBay vendors, online stores and
even the traditional
offline companies. The number of users who trust PayPal with their transactions, continues to grow. 175 million PayPal
are certainly proof of that. PayPal uses a unique and extremely advanced system to prevent fraud, which guarantees a
and safe solution for real time payments online.
GP+ objectively analyzes and assesses the quality and findablility of online stores and, at the same time, examines the
possibilities to avoid
attrition in the sales process. The base of this analysis is formed by: Google, Yahoo! and Microsoft Live, the W3C,
Lipperhey in house research,
governments, renowned trade publications, worldwide specialists pool and research done by PayPal into the
characteristics of the most successful
online stores worldwide.
(Copy of the Vendor Homepage: https://www.paypal-gpplus.com/en/about/ )
The Vulnerability Laboratory Research Team discovered a web session vulnerability in the official PayPal GP+ Web
2013-01-01: Researcher Notification & Coordination
2013-01-02: Vendor Notification
2013-01-12: Vendor Response/Feedback
2013-03-26: Vendor Fix/Patch
2013-03-28: Public Disclosure
Product: GP+ - Application Service 2013 Q1
A persistent input validation web vulnerability is detected in the official Paypal GP+ service application for
The vulnerability is located in the pop up message of the delete button where the name of the website, that has been
is not sanitized, hence the malicious code gets executed. The delete button is located in two different places which
`Recent analysis` and `all analysis` listings. Exploitation of the vulnerability requires low user interaction.
Successful exploitation of the vulnerability result in persistent session hijacking, persistent phishing, persistent
redirects, persistent external malware loads via inject and persistent vulnerable module web context manipulation.
[+] Paypal GP+ - (https://www.paypal-gpplus.com/en/dashboard/all/)
[+] Analyze a new website
[+] Website field out of the pop up message
[+] Recent Analysis - All Analysis
Proof of Concept:
The vulnerability can be exploited by remote attackers without user interaction and without privileged application user
For demonstration or reproduce ...
The attacker should go and insert the malicious code in the field of the website he would like to search it. After
he should click on "Scan URL". The scan will generate an error because the url is invalid, but when the user goes back
to his dashboard
and choose Recent Analysis/All Analysis, and he stops with his mouse pointer no the delete icon in the page, the
malicious code will be executed.
<a href="https://www.paypal-gpplus.com/en/dashboard/analysis/2727753/"><[PERSISTENT INJECTED SCRIPT CODE!]<</a>
<td colspan="6">An error has occurred!</td>
<tr id="tr-2727749" class="tr-row">
<a href="https://www.paypal-gpplus.com/en/dashboard/analysis/2727749/">"><[PERSISTENT INJECTED SCRIPT CODE!]</a>
The security risk of the persistent input validation web vulnerability is estimated as medium(+).
Vulnerability Laboratory [Research Team] - Ibrahim El-Sayed (the_storm) [storm () vulnerability-lab com]
The information provided in this advisory is provided as it is without any warranty. Vulnerability-Lab disclaims all
either expressed or implied, including the warranties of merchantability and capability for a particular purpose.
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- Paypal Bug Bounty #46 - Persistent Web Vulnerability Vulnerability Lab (Mar 28)