[FD] Ebay Inc Magento Bug Bounty #16 - CSRF Web Vulnerability

Document Title: =============== Ebay Inc Magento Bug Bounty #16 - CSRF Web Vulnerability References (Source): ==================== http://ift.tt/1GQsZIw Ebay Inc Security ID: EIBBP-31808 Release Date: ============= 2015-07-02 Vulnerability Laboratory ID (VL-ID): ==================================== 1472 Common Vulnerability Scoring System: ==================================== 2.5 Product & Service Introduction: =============================== Magento is an open source e-commerce web application that was launched on March 31, 2008 under the name Bento. It was developed by Varien (now Magento, a division of eBay) with help from the programmers within the open source community but is now owned solely by eBay Inc. Magento was built using parts of the Zend Framework. It uses the entity-attribute-value (EAV) database model to store data. In November 2013, W3Techs estimated that Magento was used by 0.9% of all websites. Our team of security professionals works hard to keep Magento customer information secure. What`s equally important to protecting this data? Our security researchers and user community. If you find a site that isn`t following our policies, or a vulnerability inside our system, please tell us right away. ( Copy of the Vendor Homepage: http://ift.tt/1E22539 & http://ift.tt/1E22539 ) Abstract Advisory Information: ============================== The Vulnerability Laboratory Research Team discovered a client-side cross site request forgery web vulnerability in the official Magento Commerce online service web-application. Vulnerability Disclosure Timeline: ================================== 2015-04-19: Researcher Notification & Coordination (Hadji Samir) 2015-04-20: Vendor Notification (eBay Inc Security Team - Bug Bounty Program) 2015-04-26: Vendor Response/Feedback (eBay Inc Security Team - Bug Bounty Program) 2015-06-15: Vendor Fix/Patch (Magento Developer Team) 2015-06-30: Bug Bounty Reward (eBay Inc Security Team - Bug Bounty Program) 2015-07-02: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== Ebay Inc. Product: Magento - Connect Web Application 2015 Q2 Exploitation Technique: ======================= Remote Severity Level: =============== Medium Technical Details & Description: ================================ A cross site request forgery web vulnerability has been discovered in the official Magento Commerce online service web-application. The vulnerability allows to execute functions without secure validation to compromise user content in the online service web-applicatio. The vulnerability is located in the /claim/claim/new/ id value POST method request of the magento connect claim module. Remote attackers with low privileged user accounts are able to perform a malicious request of other users without auth. The request method is POST and the issue attack vector is client-side (non-persistent). The security risk of the csrf web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 2.5. Exploitation of the cross site request forgery vulnerability requires no privileged web application user account and no user interaction. Successful exploitation of the web vulnerability results in unauthorized execution of web functions via client-side in the users web context. Request Method(s): [+] POST Vulnerable Module(s): [+] magento-connect/claim/claim/new/ Proof of Concept (PoC): ======================= The csrf web vulnerability can be exploited by remote attackers without privileged application user account and medium or high user interaction. For security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue. PoC: magento-connect/claim/claim/new/

Note: The POST method request has no csrf token or key that protects the session data. Reference(s): http://ift.tt/gRsn9E http://ift.tt/P3pbMn http://ift.tt/1GWr3iB http://ift.tt/1GWr3iz Solution - Fix & Patch: ======================= The web vulnerability can be patched by implementation of a cross site request forgery token or a session key. Both prevents by protecting the session credentials and secure web module functions. Security Risk: ============== The security risk of the client-side cross site request forgery web vulnerability in the magento commerce application is estimated as medium. (CVSS 2.5) Credits & Authors: ================== Vulnerability Laboratory [Research Team] - Hadji Samir [s-dz@hotmail.fr] Disclaimer & Information: ========================= 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: http://ift.tt/1jnqRwA - www.vuln-lab.com - http://ift.tt/1kouTut Contact: admin@vulnerability-lab.com - research@vulnerability-lab.com - admin@evolution-sec.com Section: magazine.vulnerability-db.com - http://ift.tt/1zNuo47 - http://ift.tt/1wo6y8x Social: http://twitter.com/#!/vuln_lab - http://ift.tt/1kouSqa - http://youtube.com/user/vulnerability0lab Feeds: http://ift.tt/1iS1DH0 - http://ift.tt/1kouSqh - http://ift.tt/1kouTKS Programs: http://ift.tt/1iS1GCs - http://ift.tt/1iS1FyF - http://ift.tt/1kouSqp 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, source code, 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 research@vulnerability-lab.com) to get a permission. Copyright © 2015 | Vulnerability Laboratory - [Evolution Security GmbH]™

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