AbanteCart Arbitrary File Upload / Cross Site Scripting

`SEC Consult Vulnerability Lab Security Advisory < 20211213-0 >  
=======================================================================  
title: Multiple vulnerabilities  
product: AbanteCart e-commerce platform  
vulnerable version: <1.3.2  
fixed version: 1.3.2  
CVE number: CVE-2021-42050, CVE-2021-42051  
impact: Medium  
homepage: https://www.abantecart.com  
found: 2021-07-19  
by: Daniel Teo (Office SG)  
Ian Chong (Office SG)  
SEC Consult Vulnerability Lab  
  
An integrated part of SEC Consult, an Atos company  
Europe | Asia | North America  
  
https://www.sec-consult.com  
  
=======================================================================  
  
Vendor description:  
-------------------  
"The meaning of the word 'abante' is to move forward or lead.  
AbanteCart community stand behind exceptional work quality and dedication to  
creating outstanding eCommerce software services. Our inspiration comes from  
the developers that like developing with AbanteCart and constantly work to  
expand and keep this project alive."  
  
Source: https://www.abantecart.com  
  
  
Business recommendation:  
------------------------  
SEC Consult recommends all companies who are using the AbanteCart software, to  
upgrade to the latest version which is available at the vendor's official  
website.  
  
An in-depth security analysis performed by security professionals is highly  
advised, as the software may be affected from further security issues.  
  
  
Vulnerability overview/description:  
-----------------------------------  
1) Unrestricted File Upload (CVE-2021-42051)  
Any low privileged user with file upload permissions can upload malicious SVG  
files that contain a JavaScript payload.  
  
By proceeding to the SVG file location, the payload will be executed on the  
client-side.  
  
  
2) DOM Based Cross-Site Scripting (CVE-2021-42050)  
DOM Based XSS is an XSS attack wherein the attack payload is executed as a  
result of modifying the DOM "environment" in the victim's browser used by the  
original client-side script, so that the client-side code runs in an  
"unexpected" manner.  
  
The application was found to have a cross-site scripting vulnerability where  
user supplied input is directly reflected in the Document Object Model, leading to  
execution of arbitrary code. The vulnerable location is an input form which  
allows users to perform search actions.  
  
  
Proof of concept:  
-----------------  
1) Unrestricted File Upload (CVE-2021-42051)  
  
A PoC SVG file can be created as follows:  
  
* ************************************************************************** *  
<?xml version="1.0" standalone="no"?>  
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"  
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">  
  
<svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg">  
<rect width="300" height="100" style="fill:rgb(0,0,255);  
stroke-width:3;stroke:rgb(0,0,0)" />  
<script type="text/javascript">  
alert("sectest XSS");  
</script>  
</svg>  
* ************************************************************************** *  
  
2) DOM Based Cross-Site Scripting (CVE-2021-42050)  
  
A payload was used in the search engine:  
  
* ************************************************************************** *  
<script>alert(document.domain)</script>  
* ************************************************************************** *  
  
Vulnerable / tested versions:  
-----------------------------  
The following product version has been tested which was the latest version available  
during the time of the test:  
* v1.3.0  
  
  
Vendor contact timeline:  
------------------------  
2021-08-16: Contacting vendor through [email protected]  
2021-08-27: Vendor responded and indicated that the AbanteCart team have  
scheduled a release on 25 September 2021 to address the issues.  
2021-12-07: Multiple emails to check with the vendor on the release date.  
However, no response from the AbanteCart team but noticed that  
they had released the new version on 26 Nov 2021.  
2021-12-13: Release of security advisory  
  
  
Solution:  
---------  
Upgrade to the latest version available v1.3.2 at the vendor's download page:  
https://www.abantecart.com/download  
  
  
Workaround:  
-----------  
None  
  
  
Advisory URL:  
-------------  
https://sec-consult.com/vulnerability-lab/  
  
  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
SEC Consult Vulnerability Lab  
  
SEC Consult, an Atos company  
Europe | Asia | North America  
  
About SEC Consult Vulnerability Lab  
The SEC Consult Vulnerability Lab is an integrated part of SEC Consult, an  
Atos company. It ensures the continued knowledge gain of SEC Consult in the  
field of network and application security to stay ahead of the attacker. The  
SEC Consult Vulnerability Lab supports high-quality penetration testing and  
the evaluation of new offensive and defensive technologies for our customers.  
Hence our customers obtain the most current information about vulnerabilities  
and valid recommendation about the risk profile of new technologies.  
  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
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EOF Daniel Teo, Ian Chong / @2021  
  
  
`