Zero-Day Advisory

Fortinet Discovers Synology DSM Note Station Cross-Site Scripting Vulnerability I

Summary

Fortinet's FortiGuard Labs has discovered a Cross-Site Scripting vulnerability in Synology DiskStation Manager Note Station.
DiskStation Manager (DSM) is an intuitive web-based operating system found on every Synology NAS. It's been designed to help users manage their data: documents, photos, music, videos and all other important forms of digital assets. With DiskStation Manager, it's more than just storing data. DSM offers a various range of applications and services to bring more entertainment to users' home life as well as better productivity at work.
The vulnerability exists due to an error in the application when handling malformed inputs in Note Station. An attacker can exploit this to execute arbitrary script code within context of the target users browser.

Solutions

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

Synology.DSM.Note.Station.XSS
Released Jan 05, 2017

Users should apply the solution provided by Synology.

Additional Information

Note Station version 1.1-0212 and before are affected.

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.