CVE-2024-24401: Nagios XI SQL Injection Vulnerability

CVE-2024-24401 Overview

CVE-2024-24401 is a SQL Injection vulnerability affecting Nagios XI 2024R1.01 that allows a remote attacker to execute arbitrary code via a crafted payload to the monitoringwizard.php component. This vulnerability presents a significant risk to organizations using Nagios XI for network and infrastructure monitoring, as successful exploitation could lead to complete system compromise.

Critical Impact

Remote attackers can exploit this SQL Injection flaw to execute arbitrary code on vulnerable Nagios XI installations without authentication, potentially compromising the entire monitoring infrastructure and connected systems.

Affected Products

• Nagios XI 2024R1.01
• Nagios XI versions prior to patched releases

Discovery Timeline

• 2024-02-26 - CVE-2024-24401 published to NVD
• 2025-06-27 - Last updated in NVD database

Technical Details for CVE-2024-24401

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) exists in the monitoringwizard.php component of Nagios XI 2024R1.01. The vulnerability allows remote attackers to inject malicious SQL statements through crafted payloads, which are then executed by the backend database. Because user-supplied input is not properly sanitized before being incorporated into SQL queries, attackers can manipulate database operations to extract sensitive data, modify records, or leverage database features to achieve arbitrary code execution on the underlying system.

The network-accessible nature of this vulnerability combined with no authentication requirements makes it particularly dangerous. Successful exploitation can result in complete compromise of confidentiality, integrity, and availability of the affected system. Given that Nagios XI is typically deployed as a central monitoring solution with visibility into entire network infrastructures, compromise of this system could provide attackers with valuable reconnaissance data and potential pivot points for lateral movement.

Root Cause

The root cause of CVE-2024-24401 is improper input validation and lack of parameterized queries in the monitoringwizard.php component. User-controlled input is directly concatenated into SQL query strings without proper sanitization or escaping, enabling SQL Injection attacks. This represents a failure to follow secure coding practices that separate data from code in database operations.

Attack Vector

The attack vector is network-based, requiring no authentication or user interaction. An attacker can craft malicious HTTP requests to the monitoringwizard.php endpoint containing SQL Injection payloads. The vulnerable component processes these requests and passes unsanitized input directly to the database layer, where the injected SQL commands are executed with the privileges of the database user.

The exploitation mechanism typically involves:

1. Identifying the vulnerable parameter in monitoringwizard.php
2. Crafting SQL Injection payloads to probe database structure
3. Escalating to data exfiltration or leveraging database features (such as INTO OUTFILE in MySQL or xp_cmdshell in MSSQL) to achieve code execution
4. Establishing persistent access to the compromised system

Detection Methods for CVE-2024-24401

Indicators of Compromise

• Unusual SQL error messages in Nagios XI web server logs
• Unexpected database queries containing SQL keywords like UNION, SELECT, DROP, or xp_cmdshell in database logs
• Anomalous requests to /nagiosxi/includes/components/monitoringwizard.php with suspicious parameter values
• Unauthorized modifications to Nagios XI configuration or database records

Detection Strategies

• Deploy web application firewall (WAF) rules to detect SQL Injection patterns targeting Nagios XI endpoints
• Implement database activity monitoring to identify anomalous query patterns
• Enable detailed logging on the Nagios XI web server and review logs for suspicious requests to monitoringwizard.php
• Use intrusion detection systems (IDS) with signatures for common SQL Injection attack patterns

Monitoring Recommendations

• Monitor HTTP access logs for requests to monitoringwizard.php containing special characters commonly used in SQL Injection (', ", ;, --, /*)
• Establish baseline database query patterns and alert on deviations
• Implement real-time alerting for database errors that may indicate injection attempts
• Review Nagios XI audit logs for unauthorized configuration changes

How to Mitigate CVE-2024-24401

Immediate Actions Required

• Upgrade Nagios XI to the latest patched version immediately
• Restrict network access to Nagios XI administrative interfaces using firewall rules or VPN requirements
• Implement web application firewall rules to block SQL Injection attempts
• Review database and system logs for evidence of prior exploitation

Patch Information

Nagios has released security updates to address this vulnerability. Organizations should consult the Nagios Changelog for specific version information and upgrade to the latest available release that includes the fix for CVE-2024-24401.

Workarounds

• Implement network segmentation to restrict access to Nagios XI from untrusted networks
• Deploy a reverse proxy with SQL Injection filtering capabilities in front of Nagios XI
• Temporarily disable or restrict access to the monitoringwizard.php component if not operationally required
• Enable additional authentication requirements for accessing Nagios XI web interfaces

# Example: Restrict access to Nagios XI using iptables
# Allow only trusted management network
iptables -A INPUT -p tcp --dport 80 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP