Document Title: =============== Ebay Inc Xcom #7 - (Policy) Persistent Vulnerability References (Source): ==================== http://www.vulnerability-lab.com/get_content.php?id=1228 Release Date: ============= 2015-03-25 Vulnerability Laboratory ID (VL-ID): ==================================== 1228 Common Vulnerability Scoring System: ==================================== 4 Product & Service Introduction: =============================== eBay Inc. is an American multinational internet consumer-to-consumer corporation, headquartered in San Jose, California. It was founded by Pierre Omidyar in 1995, and became a notable success story of the dot-com bubble; it is now a multi-billion dollar business with operations localized in over thirty countries. The company manages eBay.com, an online auction and shopping website in which people and businesses buy and sell a broad variety of goods and services worldwide. In addition to its auction-style sellings, the website has since expanded to include `Buy It Now` standard shopping; shopping by UPC, ISBN, or other kind of SKU (via Half.com); online classified advertisements online event ticket trading online money transfers and other services. (Copy of the Homepage: http://en.wikipedia.org/wiki/EBay ) Abstract Advisory Information: ============================== The Vulnerability Laboratory Research Team discovered mutliple persistent input validation web vulnerabilities in the official Ebay Xcom Policy Web-Application (CMS & API). Vulnerability Disclosure Timeline: ================================== 2014-03-16: Researcher Notification & Coordination (Benjamin Kunz Mejri - Evolution Security GmbH) 2014-03-17: Vendor Notification (eBay Inc - Security Research Team) 2014-04-16: Vendor Response/Feedback (eBay Inc - Security Research Team) 2015-03-19: Vendor Fix/Patch (eBay Inc - Xcom Developer Team) 2015-03-25: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== Ebay Inc. Product: Ebay Inc - Official WebSite Magento Application & API 2014 Q1 Exploitation Technique: ======================= Remote Severity Level: =============== Medium Technical Details & Description: ================================ Multiple application-side input validation web vulnerabilities has been discovered in the official Ebay Xcom Policy Web-Application (CMS & API). A persistent validation web vulnerability allows remote attackers to inject malicious script codes on the application-side of the affected ebay online-service. The vulnerability is located in the `my ebay account > return policy > edit returm policy module. The vulnerable input is the return policy name value. The persistent script code execution occurs in the affected vulnerable sections of the connected `businesspolicy/manage` and `Activity Log - Item Listing` modules. The attack vector is persistent and the severity is medium. The security risk of the persistent web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 4.0. Exploitation of the persistent input validation vulnerability requires a low privileged web-application user account and low user interaction. Successful exploitation results in session hijacking, persistent phishings attacks, persistent external redirect and malware loads or persistent manipulation of affected and connected module context. Request Method(s): [+] POST Vulnerable Module(s): [+] My Account > Return Policy > Edit Return Policy (http://www.bizpolicy.ebay.com/businesspolicy/) Vulnerable Input(s): [+] Edit return policy > Policy name Vulnerable Parameter(s): [+] name Affected Module(s): [+] ebay.com/businesspolicy/manage [+] Activity Log - Item Listing > Name Proof of Concept (PoC): ======================= The application-side cross site web vulnerability can be exploited by remote attackers with low privileged 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. 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HttpOnly nonsession=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; Domain=.ebay.com; Expires=Tue, 17-Mar-2015 18:00:03 GMT; Path=/ secses=BAQAAAUSucEmyAAaAAUsAGFUIa6M1MzI3MzdjMC4wLjEuMTEuNzguMi4wLjJ5+5WwmaLoxSDYeRvnyhWgee/Y/g**; Domain=.ebay.com; Path=/ lucky9=9393341; Domain=.ebay.com; Expires=Sat, 16-Mar-2019 18:00:03 GMT; Path=/] Cache-Control[private] Pragma[no-cache] Content-Type[text/plain] Content-Length[22] Date[Mon, 17 Mar 2014 18:00:03 GMT] PoC: Activity log: Return Policy 1 [x]

Activity log: Return Policy 1 "><[PERSISTENT INJECTED SCRIPT CODES!]);">

Date/Time Action Description Report
Note: After the exploitation the active log serivce is also compromised. --- PoC Session Logs [GET] --- Status: 200[OK] GET http://www.bizpolicy.ebay.com/businesspolicy/x[PERSISTENT INJECTED SCRIPT CODE!] Load Flags[LOAD_NORMAL] Größe des Inhalts[1201] Mime Type[text/html] Request Header: Host[www.bizpolicy.ebay.com] User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0] Accept[image/png,image/*;q=0.8,*/*;q=0.5] Accept-Language[de-de,de;q=0.8,en-us;q=0.5,en;q=0.3] Accept-Encoding[gzip, deflate] Referer[http://www.bizpolicy.ebay.com/businesspolicy/manage?totalPages=1] Cookie[ebay=%5Epsi%3DASTJiAAE*%5EsfLMD%3D1391608831%5Esbf%3D%23200000000000c0048002004%5Ecos%3D1%5Ecv%3D15555%5Esin%3Din%5Ejs%3D1%5Edv%3D53273c55%5E; dp1=ba1p/053289001^bl/DE56e9a581^kms/in56e9a581^reg/%5EflagReg%3D1%5E56e9a581^pcid/159931376355087201^mpc/0%7C7753346d81^pbf/%2340000000000081a88200000455087201^tzo/-3c53274c91^exc/0%3A0%3A0%3A0534ecb81^mms/0.53272b71.053288945^u1p/MjAxNC5rdW56bQ**55087201^u1f/Benjamin55087201^idm/153274c6b^; s=BAQAAAUSucEmyAAWAAAEAClMoeF0yMDE0Lmt1bnptAAMAAVMokAEwAWUAAlMokAEjMgAGAAFTKJABMACoAAFTKHhdMQFKABhTKJABNTMyNzM3YzAuMC4xLjExLjc4LjIuMC4yAAwAClMokAExMjI1NjM3OTA2AO4AflMokAExBmh0dHA6Ly9teS5lYmF5LmNvbS93cy9lQmF5SVNBUEkuZGxsP015ZUJheSZteWViYXk9JnRva2VuaWQ9NDgmY3VycmVudHBhZ2U9TXllQmF5UHJlZmVyZW5jZXMmc3NwYWdlbmFtZT1zdWNjZXNzQWRQcmVmZXJlbmNlcwcAEgAKUyiQAXRlc3RDb29raWUA9AAiUyiQASQyJEFQS2hOWS9QJC51akNnREpDSGIudm1PbzV6TFJUejEA+AAgUyiQAWQwYTVhZTQ1MTQ0MGE0MjhiMzgyZmUzMmZmZmZmZTg0ALgADFMnP60xMzk1MDc5MzUwOjAAPQAKUyiQATIwMTQua3Vuem3M/bEjO3QgStCZxGHoMG4FWaj2Rg**; nonsession=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; cssg=d0a5ae451440a428b382fe32fffffe84; cid=xAMhIMTTiG9hpoAp%231599313763; lucky9=9393341; npii=btguid/c77cf3df1440a3586c244ad4fffffe4f55087201^cguid/c77cfce61440a56b23d61f96fe2e024155087201^; ds1=ats/1395074781098; ns1=BAQAAAUSucEmyAAaAAKUADVUIcgExMjI1NjM3OTA2LzA7Z/0uwdxIwLmpExj/Whb9VGXz2oM*; secses=BAQAAAUSucEmyAAaAAUsAGFUIcgE1MzI3MzdjMC4wLjEuMTEuNzguMi4wLjJdgCSPs+1ulBCbABPTM3Q2B4zn6g**; shs=BAQAAAUSucEmyAAaAAVUADlMwYV01MTYyMjA1MzEwMDQsM0lQMoD56FArTr0IRZNrcW0RgsFk; JSESSIONID=D0F0865539CABCE246EB953E8860B953; ds2=asotr/b7qeZzzzzzzz^sotr/b7qeZzzzzzzz^] Connection[keep-alive] Response Header: rlogid[t6al%7Cwliodz%3F%3Cwk%7D1e37e*%3B27c-144d14de1b3-0x96] Content-Type[text/html;charset=utf-8] Content-Length[1201] Date[Mon, 17 Mar 2014 18:29:05 GMT] Server[eBay Server] Reference(s): http://www.ebay.com/businesspolicy/ http://www.bizpolicy.ebay.com/businesspolicy/return http://www.bizpolicy.ebay.com/businesspolicy/return?profileId=52844186015&mode=edit&catId=ALL&profileName= http://www.bizpolicy.ebay.com/businesspolicy/return?totalPages=1&profileId=52844186015&pageNumber=1&source=manage http://www.bizpolicy.ebay.com/businesspolicy/manage?pageNumber=1&totalPages=1&context={%22status%22%3A%22success_edit_return%22} http://www.bizpolicy.ebay.com/businesspolicy/return?totalPages=1&profileType=RETURN_POLICY&profileId=52844186015&pageNumber=1&source=manage http://www.bizpolicy.ebay.com/businesspolicy/ http://www.bizpolicy.ebay.com/businesspolicy/manage?totalPages=1 Solution - Fix & Patch: ======================= The vulnerability can be patched by a secure encode and parse of the vulnerable policy name item list and activity log name list. Restrict the input field for special character and disallow wrong inputs by usage of a secure exception-handling to prevent exections. Security Risk: ============== The security risk of the persistent input validation web vulnerability in the policy name & activity-log module is estimated as medium. (CVSS 4.0) Credits & Authors: ================== Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@evolution-sec.com) [www.vulnerability-lab.com] 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. 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