CVE-2018-10637 in V-Server
Summary
by MITRE
A maliciously crafted project file may cause a buffer overflow, which may allow the attacker to execute arbitrary code that affects Fuji Electric V-Server Lite 4.0.3.0 and prior.
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Analysis
by VulDB Data Team • 06/23/2020
The vulnerability identified as CVE-2018-10637 represents a critical buffer overflow flaw within Fuji Electric V-Server Lite 4.0.3.0 and earlier versions. This issue stems from inadequate input validation mechanisms when processing project files, creating a scenario where maliciously crafted data can trigger memory corruption. The vulnerability resides in the software's failure to properly sanitize and validate file inputs before processing them, which directly aligns with CWE-121, Buffer Overflow. The attack vector specifically targets the project file parsing functionality, where an attacker can construct a specially formatted project file that exceeds the allocated buffer space, leading to memory overwrite conditions.
The technical implementation of this vulnerability demonstrates a classic stack-based buffer overflow scenario where insufficient bounds checking allows an attacker to overwrite adjacent memory locations. When the vulnerable software attempts to parse the malicious project file, it allocates a fixed-size buffer to store project data without proper validation of the input length. This flaw enables attackers to inject additional data beyond the buffer boundaries, potentially overwriting return addresses, function pointers, or other critical memory segments. The consequences extend beyond simple memory corruption as this overflow can be leveraged to redirect program execution flow, allowing arbitrary code execution with the privileges of the affected application.
The operational impact of this vulnerability is severe for organizations utilizing Fuji Electric V-Server Lite systems, as successful exploitation can result in complete system compromise. Attackers can execute malicious code remotely without requiring authentication, potentially gaining persistent access to industrial control systems. The vulnerability affects the integrity and availability of critical infrastructure applications, as the attacker could manipulate project configurations, access sensitive data, or disrupt normal operations. This represents a significant concern for industrial environments where V-Server Lite is deployed, as such systems often control critical processes in manufacturing, power generation, or other essential services. The exploitability of this vulnerability is enhanced by the fact that it requires no user interaction, making it particularly dangerous in environments where automated attacks or insider threats may exist.
Mitigation strategies for CVE-2018-10637 should prioritize immediate remediation through official vendor patches and updates. Organizations must upgrade to Fuji Electric V-Server Lite versions that address this vulnerability, as the vendor likely released a security update specifically targeting the buffer overflow condition. Network segmentation and access controls should be implemented to limit exposure of affected systems, particularly in industrial control networks where such vulnerabilities can have cascading effects. Input validation should be enhanced at multiple layers including application-level checks, file format validation, and runtime monitoring to detect potential exploitation attempts. Security professionals should monitor for indicators of compromise such as unusual file access patterns or unexpected process behavior, as outlined in the ATT&CK framework's technique for privilege escalation and execution. Additionally, regular security assessments and penetration testing of industrial control systems should be conducted to identify similar vulnerabilities in other critical applications that may be susceptible to similar buffer overflow conditions.