CVE-2009-4499 in Zabbix
Summary
by MITRE
SQL injection vulnerability in the get_history_lastid function in the nodewatcher component in Zabbix Server before 1.6.8 allows remote attackers to execute arbitrary SQL commands via a crafted request, possibly related to the send_history_last_id function in zabbix_server/trapper/nodehistory.c.
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Analysis
by VulDB Data Team • 02/03/2025
The vulnerability identified as CVE-2009-4499 represents a critical SQL injection flaw within the Zabbix monitoring system's nodewatcher component. This vulnerability specifically affects Zabbix Server versions prior to 1.6.8 and resides within the get_history_lastid function implementation. The flaw enables remote attackers to execute arbitrary SQL commands through carefully crafted requests that exploit improper input validation mechanisms. The vulnerability's impact extends to the zabbix_server/trapper/nodehistory.c module, particularly affecting the send_history_last_id function which processes historical data from monitored nodes. This SQL injection vulnerability operates at the application layer and demonstrates a classic weakness in database query construction where user-supplied input is directly incorporated into SQL statements without proper sanitization or parameterization.
The technical exploitation of this vulnerability occurs when the get_history_lastid function fails to properly validate or escape input parameters before incorporating them into database queries. Attackers can manipulate the input to inject malicious SQL code that gets executed by the database engine, potentially allowing full database access, data manipulation, or even command execution on the underlying system. The vulnerability is particularly dangerous because it affects the core monitoring infrastructure of Zabbix, which typically operates with elevated privileges to access system metrics and performance data. This flaw falls under CWE-89, which specifically addresses SQL injection vulnerabilities where untrusted data is used in SQL commands without proper escaping or parameterization. The vulnerability's classification aligns with ATT&CK technique T1071.004, which covers application layer protocol manipulation, and T1190, which addresses exploitation of remote services through injection attacks.
The operational impact of this vulnerability extends beyond simple data compromise, as Zabbix servers typically serve as central monitoring points for enterprise infrastructure. An attacker who successfully exploits this vulnerability could gain access to sensitive system metrics, user credentials, network topology information, and other critical monitoring data. The vulnerability affects the trapper component specifically, which is responsible for receiving data from monitored hosts, making it a prime target for attackers seeking to compromise the entire monitoring ecosystem. Organizations using affected Zabbix versions face significant risk of unauthorized access to their infrastructure monitoring data, potentially enabling attackers to identify system weaknesses, plan further attacks, or even gain persistence within their networks. The vulnerability's exploitation requires network access to the Zabbix server and demonstrates how monitoring systems, which are often considered benign infrastructure components, can become attack vectors when not properly secured.
Mitigation strategies for CVE-2009-4499 should prioritize immediate patching of affected Zabbix Server installations to version 1.6.8 or later, which contains the necessary fixes for the SQL injection vulnerability. Organizations should also implement network segmentation to limit access to Zabbix server components, particularly the trapper service which handles incoming data from monitored hosts. Input validation should be strengthened throughout the application, ensuring that all user-supplied data is properly escaped or parameterized before database interaction. Security monitoring should be enhanced to detect unusual patterns in data submission that might indicate exploitation attempts. The vulnerability's remediation aligns with security best practices outlined in the OWASP Top Ten, particularly addressing the risk of injection flaws that remain among the most prevalent security vulnerabilities in web applications. Organizations should also conduct thorough security assessments of their monitoring infrastructure to identify similar vulnerabilities in other components that might be similarly exposed to SQL injection attacks.