Zero-Day Advisory

Fortinet Discovers Joomla! VirtueMart Extension Cross-Site Scripting Vulnerability

Summary

Fortinet's FortiGuard Labs has discovered a Cross-Site Scripting (XSS) vulnerability in Joomla! VirtueMart Extension.
VirtueMart is a free and open source e-commerce solution designed as an extension of the Joomla! content management system (CMS). VirtueMart is a highly configurable and customizable multi-language e-commerce solution. With the experience of more than 10 years, now VirtueMart is very powerful and the leading e-commerce solution with more than 2 million downloads. Joomla! is the second most used CMS on the Internet after WordPress.
The vulnerability exists due to insufficiently sanitizing user-supplied inputs. A remote attacker could exploit it to inject malicious script code into the web pages generated by VirtueMart Extension. When victims view these crafted web pages via Web Browser, the injected script code will be automatically executed on behalf of the victims.

Solutions

FortiGuard Labs released the following FortiGate IPS signature which covers this specific vulnerability:

Joomla.VirtueMart.Extension.Order.Vtip.XSS
Released Apr 21, 2015

Users should apply the solution provided by VirtueMart.

Additional Information

This is a persistent Cross-Site Scripting vulnerability. Any Joomla! user can exploit it to inject arbitrary script code by placing a specially-crafted order.

Acknowledgement

This vulnerability was discovered by Zhouyuan Yang of Fortinet's FortiGuard Labs.

IPS Subscription

Fortinet customers who subscribe to Fortinet's intrusion prevention (IPS) service should be protected against this vulnerability with the appropriate configuration parameters in place. Fortinet's IPS service is one component of FortiGuard Subscription Services, which also offer comprehensive solutions such as antivirus, Web content filtering and antispam capabilities. These services enable protection against threats on both application and network layers. FortiGuard Services are continuously updated by FortiGuard Labs, which enables Fortinet to deliver a combination of multi-layered security intelligence and true zero-day protection from new and emerging threats. These updates are delivered to all FortiGate, FortiMail and FortiClient products. Fortinet strictly follows responsible disclosure guidelines to ensure optimum protection during a threat's lifecycle.