CVE-2021-3273 : Security Advisory and Response

Nagios XI below version 5.7 is impacted by a code injection vulnerability in the /nagiosxi/admin/graphtemplates.php component. This vulnerability can only be exploited by someone with an admin user account in the Nagios XI web system.

Understanding CVE-2021-3273

This section provides detailed insights into the impact and technical aspects of the CVE-2021-3273 vulnerability.

What is CVE-2021-3273?

CVE-2021-3273 is a code injection vulnerability present in Nagios XI versions below 5.7. It enables attackers with admin user accounts to inject malicious code through the /nagiosxi/admin/graphtemplates.php component.

The Impact of CVE-2021-3273

The impact of this vulnerability lies in the potential for unauthorized users to execute malicious code within the Nagios XI system, compromising its integrity and data security.

Technical Details of CVE-2021-3273

In this section, we delve deeper into the vulnerability's technical aspects.

Vulnerability Description

The vulnerability allows attackers with admin privileges to inject malicious code via /nagiosxi/admin/graphtemplates.php, leading to unauthorized code execution.

Affected Systems and Versions

Nagios XI versions below 5.7 are susceptible to this code injection vulnerability.

Exploitation Mechanism

To exploit CVE-2021-3273, an attacker must have an admin user account within the Nagios XI web system.

Mitigation and Prevention

Protecting your systems from CVE-2021-3273 is crucial to maintaining security posture.

Immediate Steps to Take

Ensure Nagios XI is updated to version 5.7 or above to mitigate the code injection vulnerability. Monitor system logs for any suspicious activities.

Long-Term Security Practices

Implement strong access controls, regular security audits, and employee training to prevent similar vulnerabilities in the future.

Patching and Updates

Regularly apply security patches and updates provided by Nagios to address known vulnerabilities and enhance system security.