CVE-2018-14809 in V-Server
Summary
by MITRE
Fuji Electric V-Server 4.0.3.0 and prior, A use after free vulnerability has been identified, which may allow remote code execution.
Once again VulDB remains the best source for vulnerability data.
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 use after free condition that exposes systems to remote code execution risks. This flaw occurs when the application improperly handles memory management during specific operational sequences, creating opportunities for malicious actors to exploit the system remotely. The vulnerability affects the V-Server software which is designed for industrial automation and control systems, making it particularly concerning for operational technology environments where system reliability and security are paramount.
This use after free vulnerability stems from improper memory deallocation practices within the application's code execution flow. When certain functions process data or handle user inputs, the system allocates memory for specific operations and subsequently frees that memory. However, the application fails to properly invalidate pointers or prevent subsequent access to the freed memory region. This creates a scenario where an attacker can manipulate the system to execute arbitrary code by leveraging the freed memory space, potentially leading to complete system compromise. The vulnerability is classified under CWE-416 as a use after free condition, which is a well-documented memory safety issue that frequently results in remote code execution capabilities.
The operational impact of this vulnerability extends significantly within industrial control environments where Fuji Electric V-Server systems are deployed. These systems typically manage critical infrastructure components including manufacturing processes, power generation, and other essential services. Remote code execution capabilities allow attackers to gain unauthorized access to control systems, potentially leading to process disruption, data manipulation, or complete system compromise. The implications are particularly severe in environments where operational technology and information technology systems intersect, as the attack surface expands beyond traditional network boundaries into physical control systems. This vulnerability aligns with ATT&CK technique T1210 - Exploitation of Remote Services, specifically targeting industrial control systems that may lack traditional security controls found in enterprise environments.
Mitigation strategies for this vulnerability require immediate attention through official firmware updates provided by Fuji Electric, as the vendor has likely released patches addressing the memory management issues. Organizations should implement network segmentation to isolate V-Server systems from general network access, reducing potential attack vectors. Additionally, monitoring network traffic for unusual patterns that might indicate exploitation attempts, combined with regular security assessments of industrial control systems, can help identify potential compromise. The vulnerability demonstrates the critical importance of memory safety in industrial control systems where traditional software security measures may not be sufficient to protect against sophisticated attacks targeting operational technology infrastructure.