At a glance:

VD Number FG-VD-16-002
Date Discovered Jan 11, 2016
Risk
Impact Cross-Site Request Forgery
CVE ID CVE-2016-4069
Affected Software Roundcube Webmail

Zero-Day Advisory

Fortinet Discovers Roundcube Webmail Cross-Site Request Forgery Vulnerability

Summary

Fortinet's FortiGuard Labs has discovered a cross-site request forgery (CSRF) vulnerability in Roundcube webmail.

Roundcube is a free and open source webmail solution with a desktop-like user interface which is easy to install/configure and that runs on a standard LAMPP server.
The vulnerability exists due to insufficient anti-CSRF protection. It could be exploited to do unwanted file downloads.

Solutions

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

Roundcube.Webmail.AttachmentZipDownload.CSRF
Released Sep 13, 2016
Users should apply the solution provided by Roundcube.

Additional Information

The vulnerability was fixed in Roundcube webmail version 1.1.5.

References

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.