CVE-2021-25297 affects Nagios XI version 5.7.5, introducing a high-severity OS command injection vulnerability. The vulnerability exists in the file /usr/local/nagiosxi/html/includes/configwizards/switch/switch.inc.php, which fails to properly sanitize authenticated user-controlled input. This oversight allows attackers to execute arbitrary OS commands on the Nagios XI server, leading to serious security implications.
The CVSS score for this vulnerability is 8.8, categorized as high severity. This rating indicates a critical risk to organizations, particularly given the attack vector is network-based with low complexity and requires only low privileges. Attackers can exploit this vulnerability without user interaction, making it an urgent threat.
Risk to organizations includes potential data breaches, unauthorized access to sensitive information, and disruptions to service availability. Given the nature of the attack vector and its implications, organizations should prioritize patching immediately.
At present, there is no public exploit confirmed; however, the vulnerability has been added to the Known Exploited Vulnerabilities catalog by CISA. Organizations should remain vigilant and monitor for any updates regarding potential exploits.
Vulnerability Details
This vulnerability allows OS command injection due to improper input sanitization. The affected product is Nagios XI, specifically version 5.7.5. The vulnerability was published on February 15, 2021, and classified as CWE-78. Organizations using this version should take immediate action to remediate the vulnerability.
Technical Analysis
The root cause of this vulnerability lies in the improper sanitization of user input within a single HTTP request. The attack vector is network-based, with a low complexity rating, indicating that the exploitation does not require advanced skills. The privileges required for exploitation are low, as the attacker only needs authenticated user access.
User interaction is not needed for exploitation, making it a significant threat. The impact on confidentiality, integrity, and availability is high, leading to potential unauthorized access to sensitive data and disruption of services.
Risk & Impact Analysis
Real-world deployment risk is considerable due to the vulnerability's presence in a widely used monitoring tool. Organizations that rely on Nagios XI for critical infrastructure monitoring should recognize the potential blast radius of this vulnerability, as it could lead to extensive unauthorized access and data breaches.
Given the high CVSS score and the entry in the KEV catalog, organizations should assess their urgency based on the potential impact. The exploitation of this vulnerability could lead to significant operational disruptions, financial losses, and reputational damage.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The affected version of Nagios XI is 5.7.5. Organizations using this version should take immediate action to apply the necessary patches. If version information is missing, it is recommended to assume that all versions prior to the vendor patch are affected.
Mitigation & Remediation
Organizations should apply updates per vendor instructions to remediate this vulnerability. Regularly updating systems and applying security patches is critical to maintaining security posture. Additionally, organizations may consider implementing configuration hardening and network controls to reduce exposure.
For further insights on how to effectively identify and remediate vulnerabilities, organizations can benefit from consulting resources on penetration testing to validate security measures.
Detection Guidance
Organizations should monitor logs for unusual activities related to Nagios XI, particularly for any unauthorized command executions. Behavioral anomalies, such as unexpected service disruptions or unauthorized access attempts, should be investigated promptly.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability is notable, as it highlights the critical need for robust input validation and sanitization processes. Organizations should learn from this incident to bolster their security frameworks and adopt preventive measures against similar vulnerabilities in the future.
For organizations utilizing Nagios, it is essential to regularly engage in penetration testing methodologies to ensure that systems are resilient against evolving threats.
Further, teams should adopt a proactive approach by integrating vulnerability management programs into their security strategy to mitigate risks effectively.
Lastly, leveraging the expertise found in red teaming services can provide organizations with insights into their security posture and help identify potential weaknesses before they can be exploited.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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