CVE-2018-14823 in V-Server
Summary
by MITRE
Fuji Electric V-Server 4.0.3.0 and prior, A stack-based buffer overflow vulnerability has been identified, which may allow remote code execution.
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Analysis
by VulDB Data Team • 06/23/2020
The vulnerability identified in Fuji Electric V-Server version 4.0.3.0 and prior represents a critical stack-based buffer overflow flaw that exposes systems to remote code execution risks. This issue affects industrial control systems and automation platforms that rely on Fuji Electric's V-Server software for operational management. The vulnerability stems from inadequate input validation mechanisms within the software's processing routines, creating opportunities for malicious actors to exploit memory corruption vulnerabilities through network-based attacks.
This buffer overflow vulnerability operates at the core of the application's memory management structure, specifically targeting stack memory allocation patterns. When the V-Server software processes incoming data streams without proper bounds checking, it allows attackers to overwrite adjacent memory locations on the stack. The flaw manifests when malformed input data is accepted and processed without sufficient validation, enabling attackers to manipulate the program's execution flow by overwriting return addresses and function pointers. The vulnerability is particularly concerning in industrial environments where these servers often operate without robust network segmentation or intrusion detection systems.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete system compromise and potential operational technology disruption. Attackers exploiting this flaw could gain unauthorized access to industrial control systems, potentially leading to process manipulation, data tampering, or complete system shutdowns. The implications are severe in manufacturing and critical infrastructure environments where V-Server implementations are commonly deployed for process control and monitoring. Organizations may face regulatory compliance violations, operational downtime, and potential safety hazards when these systems are compromised, as the vulnerability could enable attackers to manipulate industrial processes that control physical equipment and facilities.
Security professionals should implement multiple layers of defense to address this vulnerability, beginning with immediate patching of affected systems to the latest available versions from Fuji Electric. Network segmentation and access control measures should be strengthened to limit exposure of V-Server implementations to untrusted networks. Regular security monitoring and intrusion detection systems should be deployed to identify potential exploitation attempts, while application whitelisting and privilege separation techniques can help minimize the impact if exploitation occurs. The vulnerability aligns with CWE-121 stack-based buffer overflow classification and represents a significant concern under the ATT&CK framework's execution and privilege escalation tactics, emphasizing the need for comprehensive security controls in industrial environments. Organizations should also conduct thorough vulnerability assessments to identify other potentially affected systems and ensure proper network architecture design that minimizes attack surface exposure to critical industrial control systems.