CVE-2018-14819 in V-Server
Summary
by MITRE
Fuji Electric V-Server 4.0.3.0 and prior, An out-of-bounds read 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 out-of-bounds read flaw that exposes systems to potential remote code execution attacks. This issue affects industrial control systems and network infrastructure devices manufactured by Fuji Electric, specifically targeting their V-Server software implementation. The vulnerability stems from insufficient input validation mechanisms within the application's memory handling processes, creating exploitable conditions that could be leveraged by remote attackers to execute arbitrary code on affected systems.
This out-of-bounds read vulnerability operates by allowing an attacker to access memory locations beyond the bounds of allocated buffers or data structures. The flaw occurs when the V-Server software fails to properly validate the length or content of incoming data packets, particularly those related to network communications or configuration parameters. When malicious data is processed, it can cause the application to read memory regions that were not intended to be accessed, potentially leading to information disclosure, application crashes, or more severe exploitation outcomes. The vulnerability is classified under CWE-129, which specifically addresses insufficient validation of length of input buffers, making it a direct descendant of buffer overflow and memory corruption patterns.
The operational impact of this vulnerability extends beyond simple remote code execution capabilities to encompass broader system compromise and industrial control system security degradation. Organizations utilizing Fuji Electric V-Server software in critical infrastructure environments face significant risks including unauthorized access to control systems, potential disruption of industrial processes, and possible data manipulation or theft. The remote nature of the exploit means that attackers can target these systems from external networks without requiring physical access or local credentials, making the attack surface particularly concerning for operational technology environments. This vulnerability directly impacts the confidentiality, integrity, and availability of industrial control systems, potentially leading to production disruptions or safety hazards in manufacturing and process control environments.
Mitigation strategies for this vulnerability should prioritize immediate software updates and patches provided by Fuji Electric, as these typically address the underlying buffer validation issues through proper input sanitization and memory boundary checks. Network segmentation and access control measures should be implemented to limit exposure of affected systems to untrusted networks, while monitoring systems should be deployed to detect anomalous network traffic patterns that may indicate exploitation attempts. Security professionals should also consider implementing intrusion detection systems with signatures specifically targeting this vulnerability, as well as conducting thorough network assessments to identify all instances of the affected software versions. The remediation process must include comprehensive testing of patches in controlled environments before deployment to ensure operational stability, while maintaining detailed records of all affected systems for regulatory compliance and incident response purposes. Organizations should also review their industrial control system security policies to address similar vulnerabilities in other legacy systems and establish robust vulnerability management processes that include regular security assessments and timely patch deployment cycles.