DefenseCode Security Advisory
Magento Multiple Stored Cross-Site Scripting Vulnerabilities


Advisory ID:    DC-2018-03-002
Advisory Title: Magento Multiple Stored Cross-Site Scripting Vulnerabilities
Advisory URL:   http://www.defensecode.com/advisories.php
Software:       Magento
Version:        Magento 2.0 prior to 2.0.18
Vendor Status:  Vendor contacted, vulnerability fixed
Release Date:   06/03/2018
Risk:           MEDIUM



1. General Overview
===================
During the security audit of Magento Open Source 2 multiple medium
risk stored cross-site scripting vulnerabilities were discovered that
could lead to administrator account takeover, putting the website
customers and their payment information at risk.


2. Software Overview
====================
Magento is an ecommerce platform built on open source technology
which provides online merchants with a flexible shopping cart system,
as well as control over the look, content and functionality of their
online store. Magento offers powerful marketing, search engine
optimization, and catalog-management tools. It is a leading
enterprise-class eCommerce platform, empowering over 200,000
online retailers.

Homepage:
http://www.magento.com


3. Vulnerability Description
============================
During the security analysis of Magento Open Source 2 prior to 2.0.18
it was discovered that the application returns unescaped and
unsanitized user/customer controlled input on direct requests to
several application URLs.

User/customer controlled information such as customer first and last
name, street address, city, company, shipping and billing information
are unsanitized and unescaped in an output resulted from a direct
request to the following url:

http://website.com/admin/mui/index/render/?namespace=customer_listing&isAjax=true

User/customer first and last name information is unsanitized and
unescaped in an output resulted from a direct request to the
following urls:

http://website.com/admin/mui/index/render/?namespace=customer_online_grid&isAjax=true

http://website.com/admin/mui/index/render/?namespace=sales_order_invoice_grid&isAjax=true

http://website.com/admin/mui/index/render/?namespace=sales_order_grid&isAjax=true

The application will return a text/html response with a json-formatted
content. All aforementioned user-controlled input is prone to stored
cross-site scripting.

The prerequisite for this attack is that the Add Secret Key to URLs
option is disabled. Secret keys are an additional anti-CSRF measure in
Magento, with form keys being the primary measure (that can not be
disabled). In a team setting this option is often disabled in order
to be able to to pass admin links to coleagues, tickets, chat, etc.


4. Solution
===========
Vendor fixed the reported security issues and released a new version.
All users are strongly advised to update to the latest available
version.


5. Credits
==========
Discovered by Bosko Stankovic (bosko@defensecode.com).


6. Disclosure Timeline
======================
19/04/2017   Vendor contacted through Bugcrowd platform
19/04/2017   Vendor responded
28/02/2018   Vulnerability fixed
06/03/2018   Advisory released


7. About DefenseCode
====================
DefenseCode L.L.C. delivers products and services designed to analyze
and test web, desktop and mobile applications for security
vulnerabilities.

DefenseCode ThunderScan is a SAST (Static Application Security
Testing, WhiteBox Testing) solution for performing extensive security
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DefenseCode WebScanner is a DAST (Dynamic Application Security
Testing, BlackBox Testing) solution for comprehensive security audits
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by carrying out a large number of attacks using the most advanced
techniques, just as a real attacker would.

Subscribe for free software trial on our website
http://www.defensecode.com/ .

E-mail: defensecode[at]defensecode.com

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