Nagios XI is a comprehensive IT infrastructure monitoring platform used by organizations to oversee network devices, servers, and applications. IT teams in sectors like finance, healthcare, and telecommunications rely on it for real-time alerts, performance metrics, and scalability. It supports both on-premises and cloud deployments, integrating with various tools for extended functionality. Keeping Nagios XI updated is critical to prevent security breaches that could disrupt operations.
CVE-2018-10738 is a SQL injection vulnerability in Nagios XI versions prior to 5.4.13. It arises from insufficient sanitization of user inputs, allowing attackers to inject malicious SQL commands. This flaw occurs when the application constructs database queries using unsanitized data from HTTP requests, enabling unauthorized database manipulation.
The vulnerability specifically affects the admin/menuaccess.php page, where the chbKey1 parameter is not properly validated. An attacker can craft a malicious HTTP request to this endpoint, injecting SQL code that bypasses authentication or extracts sensitive information. The parameter is used in a query without parameterization, making it susceptible to injection.
If exploited, an attacker could gain unauthorized access to the Nagios XI database, potentially retrieving credentials, configuration data, or other sensitive information. This could lead to full system compromise, allowing further attacks on the monitored infrastructure. The CVSS score of 7.2 highlights the high risk, emphasizing the need for immediate remediation.
- Upgrade Nagios XI to version 5.4.13 or later to patch the SQL injection vulnerability.
- Implement strict input validation for all parameters, especially chbKey1 in admin/menuaccess.php.
- Use parameterized queries or prepared statements to prevent SQL injection in all database interactions.
- Conduct regular security audits of code and database queries to identify and fix unfiltered inputs.
- Apply web application firewall (WAF) rules to block malicious SQL injection patterns.
- Monitor database logs for unusual query activity that may indicate exploitation attempts.
- Restrict access to admin pages to trusted IP addresses or use multi-factor authentication.
- Educate developers on secure coding practices to avoid similar vulnerabilities in future updates.
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