Zero-Day Advisory

Fortinet Discovers Nagios Business Process Intelligence Cross-Site Scripting (XSS) Vulnerability


Fortinet's FortiGuard Labs has discovered a cross-site scripting (XSS) vulnerability in Nagios Business Process Intelligence (BPI).
Nagios BPI is an advanced grouping tool that allows you to set more complex dependencies to determine groups' states. Nagios XI installs this tool by default. This tool can also be installed manually as a component of the products Nagios Core and Nagios Fusion.
The vulnerability exists due to insufficiently sanitizing user-supplied data in HTTP request sent to index.php so that remote attackers can exploit it to launch a reflected XSS attack by enticing the target user to visit a malicious URL.


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

Nagios.BPI.index.php.XSS (previous name is FG-VD-15-011-NagiosXI)
Released Mar 31, 2015
Users should apply the solution provided by Nagios.


This vulnerability was discovered by Honggang Ren 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.