CVE-2024-32480 in LibreNMS
Summary
by MITRE • 04/23/2024
LibreNMS is an open-source, PHP/MySQL/SNMP-based network monitoring system. Versions prior to 24.4.0 are vulnerable to SQL injection. The `order` parameter is obtained from `$request`. After performing a string check, the value is directly incorporated into an SQL statement and concatenated, resulting in a SQL injection vulnerability. An attacker may extract a whole database this way. Version 24.4.0 fixes the issue.
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Analysis
by VulDB Data Team • 05/28/2024
LibreNMS represents a widely deployed network monitoring solution that leverages PHP, MySQL, and SNMP technologies to provide comprehensive network visibility and management capabilities. The vulnerability described in CVE-2024-32480 specifically targets the application's handling of user-supplied input within its database query construction mechanisms. This flaw exists in versions prior to 24.4.0, making a substantial portion of deployments susceptible to exploitation. The vulnerability manifests through the improper sanitization of the `order` parameter that originates from the `$request` object, creating a critical security gap in the application's input validation and query building processes.
The technical implementation of this vulnerability stems from a classic SQL injection flaw where the application performs only basic string validation on the `order` parameter before directly incorporating it into SQL query construction. This approach violates fundamental security principles of input sanitization and parameterized query usage, allowing attackers to manipulate the SQL execution context. The vulnerability specifically aligns with CWE-89, which categorizes SQL injection as a critical weakness involving the improper construction of SQL queries. When attackers exploit this flaw, they can craft malicious input that alters the intended SQL statement structure, potentially enabling full database extraction and unauthorized access to sensitive network monitoring data.
The operational impact of this vulnerability extends beyond simple data theft, as it represents a severe privilege escalation vector that could enable attackers to gain complete control over network monitoring infrastructure. Network administrators rely on LibreNMS for critical infrastructure visibility, making this vulnerability particularly dangerous in enterprise environments where network monitoring data contains sensitive operational information, device configurations, and performance metrics. The ability to extract entire databases through SQL injection compromises not only the confidentiality but also the integrity of network monitoring systems, potentially enabling attackers to manipulate monitoring data or establish persistent access points within network infrastructure. This vulnerability directly maps to ATT&CK technique T1071.004 for application layer protocol manipulation and T1566 for credential harvesting through application vulnerabilities.
The remediation for this vulnerability requires immediate upgrading to LibreNMS version 24.4.0 or later, which implements proper input validation and parameterized query construction. Organizations should conduct comprehensive vulnerability assessments to identify all systems running affected versions and implement network segmentation to limit potential exploitation. Additionally, security teams should monitor for exploitation attempts through network intrusion detection systems and implement proper input validation frameworks that prevent direct concatenation of user-supplied data into SQL statements. The fix demonstrates the importance of proper application security controls and adherence to secure coding practices that prevent injection vulnerabilities through the use of parameterized queries and comprehensive input sanitization mechanisms.