Title: ====== Paypal Bug Bounty #46 - Persistent Web Vulnerability Date: ===== 2013-03-28 References: =========== http://www.vulnerability-lab.com/get_content.php?id=805 PayPal Security UID: esj1f86plc VL-ID: ===== 805 Common Vulnerability Scoring System: ==================================== 4.3 Introduction: ============= PayPal offers, both companies and individuals, a simple, quick and innovative solution of receiving money and making payments online. 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 accounts worldwide are certainly proof of that. PayPal uses a unique and extremely advanced system to prevent fraud, which guarantees a completely reliable 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/ ) Abstract: ========= The Vulnerability Laboratory Research Team discovered a web session vulnerability in the official PayPal GP+ Web Application Service. Report-Timeline: ================ 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 Status: ======== Published Affected Products: ================== PayPal Inc Product: GP+ - Application Service 2013 Q1 Exploitation-Technique: ======================= Remote Severity: ========= Medium Details: ======== A persistent input validation web vulnerability is detected in the official Paypal GP+ service application for anlayzing websites. The vulnerability is located in the pop up message of the delete button where the name of the website, that has been analyzed, is not sanitized, hence the malicious code gets executed. The delete button is located in two different places which are `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 external redirects, persistent external malware loads via inject and persistent vulnerable module web context manipulation. Vulnerable Section(s): [+] Paypal GP+ - (https://www.paypal-gpplus.com/en/dashboard/all/) Vulnerable Module(s): [+] Analyze a new website Vulnerable Parameter(s): [+] Website field out of the pop up message Affected Module(s): [+] Recent Analysis - All Analysis Proof of Concept: ================= The vulnerability can be exploited by remote attackers without user interaction and without privileged application user account. For demonstration or reproduce ... PoC: The attacker should go and insert the malicious code in the field of the website he would like to search it. After that, 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. URL: https://www.paypal-gpplus.com/en/dashboard/all/ Code Review: <[PERSISTENT INJECTED SCRIPT CODE!]<
An error has occurred! "><[PERSISTENT INJECTED SCRIPT CODE!] Risk: ===== The security risk of the persistent input validation web vulnerability is estimated as medium(+). Credits: ======== Vulnerability Laboratory [Research Team] - Ibrahim El-Sayed (the_storm) [storm@vulnerability-lab.com] [iel-sayed.blogspot.com] 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@vulnerability-lab.com - support@vulnerability-lab.com - research@vulnerability-lab.com 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@vulnerability-lab.com or support@vulnerability-lab.com) to get a permission. Copyright © 2013 | Vulnerability Laboratory -- VULNERABILITY RESEARCH LABORATORY LABORATORY RESEARCH TEAM CONTACT: research@vulnerability-lab.com