CVE-2018-16148 in Monitor
Summary
by MITRE
The diagnosticsb2ksy parameter of the /rest endpoint in Opsview Monitor before 5.3.1 and 5.4.x before 5.4.2 is vulnerable to Cross-Site Scripting.
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Analysis
by VulDB Data Team • 03/20/2020
The vulnerability identified as CVE-2018-16148 affects Opsview Monitor versions prior to 5.3.1 and 5.4.x versions before 5.4.2, specifically within the /rest endpoint where the diagnosticsb2ksy parameter is susceptible to cross-site scripting attacks. This represents a critical security flaw that allows malicious actors to inject arbitrary JavaScript code into the application's response, potentially compromising user sessions and data integrity. The vulnerability resides in the diagnostic functionality of the monitoring platform, which is designed to provide system health information but inadvertently creates an injection vector for malicious code execution.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding within the diagnosticsb2ksy parameter processing. When user-supplied data is directly incorporated into the HTTP response without proper sanitization or encoding, it creates an environment where attackers can embed malicious scripts that execute in the context of other users' browsers. This type of flaw maps directly to CWE-79, which specifically addresses cross-site scripting vulnerabilities in web applications. The vulnerability is particularly concerning because it affects the REST endpoint, which typically handles administrative and diagnostic functions, making it a prime target for attackers seeking to escalate privileges or gain unauthorized access to monitoring systems.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable attackers to perform session hijacking, steal sensitive monitoring data, and potentially compromise the entire monitoring infrastructure. Given that Opsview Monitor is used for critical system monitoring and alerting, an attacker who successfully exploits this vulnerability could gain visibility into network operations, system status, and potentially access to sensitive operational information. The attack surface is further expanded because the diagnostic functionality is often accessible to multiple user roles, increasing the potential for exploitation. This aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as attackers could leverage the XSS to execute malicious code within the browser context of legitimate users.
Mitigation strategies for CVE-2018-16148 require immediate implementation of input validation and output encoding controls. Organizations should upgrade to Opsview Monitor versions 5.3.1 or 5.4.2 and later, which contain the necessary patches to address the vulnerability. Additionally, implementing proper parameter sanitization for all inputs, particularly those used in diagnostic and reporting functions, will prevent similar issues from occurring in other components. Web application firewalls should be configured to detect and block suspicious script injection attempts, and regular security assessments should be conducted to identify potential injection points. The remediation process must include thorough testing to ensure that the patch does not introduce regressions in legitimate diagnostic functionality while maintaining the security of the monitoring platform.