CVE-2018-15708 in Nagios XI
Summary
by MITRE
Snoopy 1.0 in Nagios XI 5.5.6 allows remote unauthenticated attackers to execute arbitrary commands via a crafted HTTP request.
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Analysis
by VulDB Data Team • 06/26/2024
The vulnerability identified as CVE-2018-15708 represents a critical remote code execution flaw within Nagios XI 5.5.6, specifically affecting the Snoopy 1.0 component. This vulnerability exposes organizations to significant security risks as it permits unauthenticated remote attackers to execute arbitrary commands on the affected system. The flaw exists in the HTTP request processing mechanism where insufficient input validation allows malicious payloads to be interpreted and executed with the privileges of the web server process. The vulnerability impacts organizations relying on Nagios XI for network monitoring and system administration, potentially compromising entire infrastructure if exploited successfully.
The technical implementation of this vulnerability stems from improper sanitization of user-supplied input within the Snoopy component of Nagios XI. When processing HTTP requests, the system fails to adequately validate or sanitize parameters that are subsequently passed to system commands. This creates a classic command injection vulnerability where attacker-controlled data can be interpreted as shell commands. The flaw operates at the application layer and requires no authentication credentials, making it particularly dangerous as it can be exploited by anyone with access to the network. The vulnerability aligns with CWE-77 and CWE-94, which categorize command injection and code injection flaws respectively, both of which are fundamental security weaknesses in application design.
From an operational perspective, this vulnerability presents severe implications for organizations using Nagios XI for system monitoring. Attackers could leverage this flaw to gain complete control over the monitoring server, potentially leading to data exfiltration, system compromise, or disruption of critical monitoring services. The impact extends beyond the immediate system as compromised monitoring infrastructure can provide attackers with visibility into network operations and potentially facilitate lateral movement within the organization. This vulnerability also violates fundamental security principles outlined in the MITRE ATT&CK framework under the T1059.001 technique for command and scripting interpreter, specifically targeting remote code execution capabilities. Organizations may experience cascading failures if monitoring systems are compromised, as alerts and notifications may be manipulated or disabled, leading to undetected security incidents.
Mitigation strategies for CVE-2018-15708 should prioritize immediate patching of Nagios XI to version 5.5.7 or later, which contains the necessary fixes for the Snoopy component. Organizations should also implement network segmentation to limit access to monitoring systems and apply firewall rules to restrict HTTP traffic to only trusted sources. Additional defensive measures include disabling unnecessary services, implementing web application firewalls, and conducting thorough network monitoring for suspicious activities. Regular security assessments and vulnerability scanning should be performed to identify similar weaknesses in other components of the monitoring infrastructure. The remediation process should also include reviewing access controls and implementing principle of least privilege for monitoring system accounts. Organizations should consider implementing intrusion detection systems to monitor for exploitation attempts and establish incident response procedures specifically addressing remote code execution vulnerabilities in monitoring infrastructure.