RVSkin – Privilege Escalation (R911-0033)

Type: Privilege Escalation
Impact: Medium
Product: RVSkin
Website: http://www.rvskin.com
Vulnerable Version: v10.77
Fixed Version: v10.78
CVE: -
R911: 0033
Date: 2013-06-24
By: http://www.rack911.com

Product Description:

RVSkin is an advance skin to use in web server control panel. A skin software provides multi-language, multi-theme, and many intelligent features to bring your unique interface differentiates your business. It’s easy to use, worth for investment.

Vulnerability Description:

There is a privilege escalation present in RVSkin due to incorrect environment handling within the rvwrapper binary that allows an attacker to modify other cPanel accounts. This flaw is allowed to exist because rvwrapper is SUID to securervskin which can read the root WHM access key.

Proof of Concept:

Due to the nature of this security flaw, we will not be posting a Proof of Concept until a much later date.

Impact:

We have deemed this vulnerability to be rated as MEDIUM due to the fact that users can make unauthorized changes to other cPanel accounts.

Vulnerable Version:

This vulnerability was tested against RVSkin v10.77.

Fixed Version:

This vulnerability was patched in RVSkin v10.78.

Vendor Contact Timeline:

2013-06-04: Vendor contacted via email.
2013-06-04: Vendor confirms vulnerability.
2013-06-04: Vendor issues update.
2013-06-24: Rack911 issues security advisory.