CVE-2016-8346 in EDR-810
Summary
by MITRE
An issue was discovered in Moxa EDR-810 Industrial Secure Router. By accessing a specific uniform resource locator (URL) on the web server, a malicious user is able to access configuration and log files (PRIVILEGE ESCALATION).
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Analysis
by VulDB Data Team • 08/14/2020
The vulnerability identified as CVE-2016-8346 affects the Moxa EDR-810 Industrial Secure Router, a network security device designed for industrial environments that requires robust protection against unauthorized access. This device serves as a critical component in industrial control systems and network infrastructure, making it a prime target for cyber attacks that could compromise entire industrial operations. The vulnerability stems from improper access controls within the web-based management interface of the router, creating a significant security gap that allows unauthorized users to bypass normal authentication mechanisms and gain access to sensitive system information.
The technical flaw manifests as a lack of proper authorization checks when processing specific URL requests within the router's web server implementation. This weakness enables a malicious actor to construct and access particular URLs that would normally require administrative privileges to access configuration and log files. The vulnerability represents a privilege escalation issue that directly violates the principle of least privilege, where users should only have access to resources necessary for their specific functions. This flaw falls under the CWE-284 category of Improper Access Control, which specifically addresses inadequate protection of system resources and data.
The operational impact of this vulnerability is substantial for industrial environments that rely on the Moxa EDR-810 for network security. An attacker who successfully exploits this vulnerability can gain access to critical system configuration data, including network settings, user credentials, and operational parameters that could be used to further compromise the industrial network. Additionally, access to log files provides attackers with valuable information about network traffic patterns, system behavior, and potential security events that could aid in planning more sophisticated attacks. The exposure of configuration files could enable attackers to identify system weaknesses, network topology details, and operational procedures that would otherwise remain confidential.
The implications extend beyond immediate data exposure to include potential disruption of industrial operations and increased attack surface for subsequent compromises. Industrial control systems often operate in closed environments where network security is paramount, and the ability to access configuration files and logs without proper authentication creates a pathway for attackers to understand system behavior and identify additional vulnerabilities. This vulnerability aligns with several ATT&CK techniques including T1078 Valid Accounts and T1046 Network Service Scanning, as it enables unauthorized access and reconnaissance activities that could lead to broader system compromise. Organizations using this device should implement immediate mitigation measures including network segmentation, access control restrictions, and regular monitoring for unauthorized access attempts to prevent exploitation of this vulnerability.