Two vulnerabilities have been discovered in osCommerce, which can be exploited by malicious people to conduct cross-site request forgery attacks, bypass certain security restrictions, and compromise a vulnerable system.

1) The application allows users to perform certain actions via HTTP requests without performing any validity checks to verify the requests. This can be exploited to e.g. create additional administrator accounts or overwrite the e.g. includes/languages/english/download.php script with arbitrary PHP code by tricking an administrative user into visiting a malicious web site.

This vulnerability is confirmed in version 2.3.3. Other versions may also be affected.

2) An error in the authentication mechanism can be exploited to bypass authentication checks and gain access to the administrative interface in the "admin/" folder.

Successful exploitation allows the uploading and execution of arbitrary PHP code e.g. via the file_manager.php script.

This vulnerability is confirmed in version 2.2 Release Candidate 2a. Other versions may also be affected.

Solution
No official solution is currently available. Update to version 2.3.1, which fixes vulnerability #2.

Provided and/or discovered by
1) Russ McRee, HolisticInfoSec
2) Flyh4t

Changelog
Further details available to Secunia VIM customers

Original Advisory
Russ McRee, HolisticInfoSec:
http://holisticinfosec.org/content/view/97/45/

Flyh4t:
http://www.exploit-db.com/exploits/9556/

Other references
Further details available to Secunia VIM customers

Deep Links
Links available to Secunia VIM customers