CVE-2018-5486 in OnCommand Unified Manager
Summary
by MITRE
NetApp OnCommand Unified Manager for Linux versions 7.2 though 7.3 ship with the Java Debug Wire Protocol (JDWP) enabled which allows unauthorized local attackers to execute arbitrary code.
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Analysis
by VulDB Data Team • 01/31/2020
The vulnerability identified as CVE-2018-5486 affects NetApp OnCommand Unified Manager for Linux versions 7.2 through 7.3, representing a critical security flaw that stems from the improper configuration of the Java Debug Wire Protocol within the application's runtime environment. This issue creates a significant attack surface by enabling the JDWP debugging interface, which is typically intended for development and testing purposes but should never be exposed in production environments. The vulnerability resides in the default configuration of the application's java virtual machine where debugging capabilities remain enabled even in production deployments, creating an unauthorized access point that can be exploited by local attackers with minimal privileges.
The technical implementation of this vulnerability involves the Java Debug Wire Protocol being activated on a network port, typically port 5005, which allows remote debugging connections to the running java process. When JDWP is enabled in production environments, it provides attackers with a direct pathway to inject malicious code into the running application process, bypassing normal authentication and authorization mechanisms. This flaw aligns with CWE-489, which addresses the presence of debugging code or features in production systems, and represents a classic case of insecure configuration management where security controls are not properly enforced in operational environments. The vulnerability can be exploited by attackers who have local access to the system, making it particularly concerning for environments where physical or administrative access controls may be inadequate.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with elevated privileges within the context of the running application. Since the NetApp OnCommand Unified Manager handles sensitive operational data and management functions, successful exploitation could lead to complete system compromise, data exfiltration, or disruption of critical storage management operations. The attack vector is particularly dangerous because it requires minimal privileges to exploit, as the JDWP interface is accessible to any user with local access to the system, making it an attractive target for both internal and external threat actors. This vulnerability directly maps to ATT&CK technique T1059.007, which covers command and scripting interpreter usage, as attackers can leverage the debugging interface to execute arbitrary commands within the application context.
Organizations affected by this vulnerability should immediately implement mitigation strategies including disabling the JDWP interface through proper configuration changes, ensuring that debugging features are only enabled during development and testing phases. The recommended approach involves modifying the java startup parameters to remove or disable the JDWP options, typically by removing the -agentlib:jdwp= option from the java command line arguments used to launch the OnCommand Unified Manager service. Additionally, system administrators should conduct comprehensive security audits to identify any other applications or services that may have similar misconfigurations, as this represents a common pattern of insecure defaults in enterprise software deployments. Network segmentation and access controls should be reinforced to limit local system access, and regular security assessments should be performed to identify and remediate similar configuration vulnerabilities across the entire infrastructure landscape.