CVE-2017-9639 in V-Server
Summary
by MITRE
An issue was discovered in Fuji Electric V-Server Version 3.3.22.0 and prior. A memory corruption vulnerability has been identified (aka improper restriction of operations within the bounds of a memory buffer), which may allow remote code execution.
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Analysis
by VulDB Data Team • 06/23/2020
The vulnerability identified as CVE-2017-9639 affects Fuji Electric V-Server version 3.3.22.0 and earlier implementations, representing a critical memory corruption flaw that fundamentally compromises system integrity. This issue manifests as an improper restriction of operations within the bounds of a memory buffer, a classification that directly maps to CWE-119, which encompasses weaknesses related to memory safety and buffer overflow conditions. The vulnerability exists within the server software's handling of memory operations, creating an exploitable condition where an attacker can manipulate memory boundaries beyond their intended limits.
The technical nature of this flaw enables remote code execution capabilities, meaning adversaries can potentially compromise systems without requiring local access or physical presence. This remote exploitation vector significantly amplifies the threat landscape, as attackers can leverage network-based attacks to gain unauthorized control over affected V-Server implementations. The memory corruption occurs during normal operational procedures, making the vulnerability particularly dangerous as it can be triggered through standard network interactions with the vulnerable server software.
Operational impact assessment reveals that organizations utilizing Fuji Electric V-Server software in production environments face substantial risk exposure from this vulnerability. The potential for remote code execution creates opportunities for attackers to establish persistent backdoors, exfiltrate sensitive data, disrupt services, or escalate privileges within the affected systems. Network-based attacks targeting this vulnerability could result in complete system compromise, particularly when the V-Server software operates in environments with limited network segmentation or inadequate monitoring controls. The vulnerability's classification under ATT&CK technique T1059.007 for command and scripting interpreter suggests that successful exploitation could enable attackers to execute arbitrary commands on compromised systems.
Mitigation strategies should prioritize immediate patching of affected V-Server implementations to version 3.3.23.0 or later, which contains the necessary security fixes for the memory corruption issue. Organizations should implement network segmentation to limit access to V-Server systems and deploy intrusion detection systems to monitor for suspicious network traffic patterns associated with exploitation attempts. Additionally, regular security assessments and vulnerability scanning should be conducted to identify any other potentially affected systems within the organization's infrastructure. The remediation process must include thorough testing of patches in controlled environments before deployment to ensure compatibility with existing operational procedures while maintaining the security posture against this specific memory corruption vulnerability.