Nagios XI Cross-Site Scripting Scanner

Nagios XI is a powerful IT infrastructure monitoring software widely used by businesses and IT environments to monitor network devices, servers, and services. It is utilized by system administrators to detect and fix IT infrastructure problems before they affect critical business processes. The software offers advanced monitoring capabilities, performance tracking, and visualization of data for informed decision-making. Moreover, Nagios XI is integrated into numerous corporate environments due to its unified monitoring solution features. The software's ability to scale and support large, complex environments makes it ideal for a variety of industries, including finance, healthcare, and technology. Overall, it aims to provide comprehensive insights into all parts of an IT infrastructure.

The vulnerability scanned for in Nagios XI is Cross-Site Scripting (XSS), a type of security issue in which an attacker injects malicious scripts into web pages viewed by other users. This form of attack allows the perpetrator to assume the identity of the victim user, perform actions with the same permissions as the user, and alter the behavior of a web application. In the context of Nagios XI, an XSS vulnerability could enable attackers to execute scripts to steal session tokens, redirect users to malicious sites, or display fraudulent content. This vulnerability is particularly dangerous if the malicious script is executed in the browser of an administrator with elevated privileges. Additionally, XSS vulnerabilities can sometimes serve as entry points for more serious attacks like data theft and segmentation breaches.

In Nagios XI version 5.7.1, an XSS vulnerability was identified in the handling of web page inputs that lack proper sanitization and escaping. Specifically, end-points that return reflected user input are vulnerable when a carefully crafted input containing malicious scripts is executed. This vulnerability exists in the 'ccm' component, where user inputs are processed and echoed back within the application responses. Attackers can craft URLs containing script payloads that, when clicked by unsuspecting users, execute these scripts in their browsers. This reflected XSS allows for temporary intrusion, relying on user interaction to execute. Key signs of vulnerability include web pages with unfiltered output embedded within HTML scripts or attributes directly.

If exploited, the XSS vulnerability in Nagios XI could have severe consequences. Users clicking on a malicious link could unwittingly execute attacker-controlled code in their browsers. Such exploitations can lead to session hijacking, account compromise, unauthorized access to sensitive information, and manipulation of page content to mislead or misinform users. Moreover, if the affected users have administrative rights, the attacker could gain additional privileges within the Nagios XI system, potentially granting access to critical system information. Thus, abuse of the XSS vulnerability could compromise overall security integrity and confidentiality, affecting the operation of the Nagios XI environment.

REFERENCES

• https://github.com/EmreOvunc/Nagios-XI-Reflected-XSS?tab=readme-ov-file