CVE-2021-40272 Scanner

IRTS OP5 Monitor is a robust monitoring tool used by enterprise IT environments to keep track of network systems and services. It is commonly deployed by Network and IT administrators to ensure operational uptime and performance. With the ability to monitor a wide range of systems, OP5 Monitor provides administrators with insights into network traffic, server performance, and application availability. Its modular architecture supports various plugins to extend its capabilities according to organizational needs. This software is pivotal in environments requiring round-the-clock monitoring to maintain service level agreements. Users often leverage OP5 Monitor for comprehensive reporting and alerting functionalities to automate IT operations.

Cross-Site Scripting (XSS) is a vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. When exploited, XSS can be used to steal cookies, session tokens, or other sensitive information. It typically occurs when a web application does not properly sanitize user inputs and outputs data without encoding it. The impact of a successful XSS attack can range from data theft to the complete takeover of an affected account. Ensuring proper input validation and output encoding are primary measures to mitigate this vulnerability. XSS remains a common vulnerability due to insufficient or flawed implementation of security measures in web applications.

This XSS vulnerability in OP5 Monitor is found in the help parameter of the IRTS interface. The vulnerable endpoint is accessed via the /api/help path, which does not properly filter malicious script tags. The injection point exists within the onmouseover event handler, which is unsanitized, allowing arbitrary script execution. To trigger the vulnerability, an attacker needs to craft a URL that includes a payload within this parameter. The attack vector typically involves an authenticated user clicking on a specially crafted link. Protection against such vectors requires rigorous input validation and escaping user inputs.

Exploiting this vulnerability allows attackers to run unauthorized scripts in the context of the user’s browser session. This may lead to credential theft or unauthorized actions carried out on behalf of the victim. Furthermore, attackers could manipulate site content visible to the victim, or redirect the victim to a phishing page. Persistent XSS attacks can result in broader impacts, affecting multiple users over time if the attack is embedded within the application. The overarching risk is a compromise of data integrity and confidentiality of affected systems.

REFERENCES

• https://github.com/hosakauk/exploits/blob/master/itrs_op5_monitor_xss.pdf
• https://nvd.nist.gov/vuln/detail/CVE-2021-40272