CVE-2023-4990 in MCL-Net
Summary
by MITRE • 10/25/2023
Directory traversal vulnerability in MCL-Net versions prior to 4.6 Update Package (P01) may allow attackers to read arbitrary files.
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Analysis
by VulDB Data Team • 10/31/2023
The directory traversal vulnerability identified in MCL-Net versions prior to 4.6 Update Package (P01) represents a critical security weakness that enables remote attackers to access arbitrary files on the affected system. This vulnerability stems from insufficient input validation within the application's file handling mechanisms, allowing malicious actors to manipulate file path parameters and gain unauthorized access to sensitive data. The flaw exists in the way the software processes user-supplied input when accessing files, creating an opportunity for attackers to traverse directory structures beyond the intended boundaries. Such vulnerabilities are particularly dangerous in networked environments where applications handle file operations, as they can lead to complete system compromise and data exfiltration.
The technical implementation of this vulnerability aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal. Attackers can exploit this weakness by crafting malicious input containing sequences such as "../" or "..\", which when processed by the vulnerable application, allow them to navigate to directories outside the intended file access scope. The vulnerability manifests when the application fails to properly sanitize or validate file path parameters before using them in file operations, creating a direct pathway for unauthorized file access. This type of flaw is particularly prevalent in applications that dynamically construct file paths based on user input without adequate security controls or input validation measures.
The operational impact of this vulnerability extends beyond simple unauthorized file access, potentially enabling attackers to read configuration files, database credentials, application source code, and other sensitive information that could lead to further exploitation. In enterprise environments, this vulnerability could allow attackers to obtain system-level access, escalate privileges, and potentially compromise entire network infrastructures. The attack surface is particularly concerning for MCL-Net systems that handle sensitive data, as the vulnerability could be leveraged to extract proprietary information, credentials, or system configurations that would otherwise remain protected. Security professionals should note that this vulnerability could be combined with other exploits to create more sophisticated attack vectors, making it a high-priority target for remediation.
Organizations should immediately implement the available patches and updates provided in the 4.6 Update Package (P01) to address this vulnerability. Additionally, network administrators should consider implementing input validation controls at multiple layers including application firewalls, web application firewalls, and network segmentation to limit potential attack surfaces. The remediation process should include thorough testing of the update package to ensure compatibility with existing systems and configurations. Security teams should also conduct comprehensive vulnerability assessments to identify any potential exploitation attempts and monitor network traffic for suspicious patterns that might indicate active exploitation attempts. This vulnerability serves as a reminder of the critical importance of regular security updates and proper input validation in preventing common attack vectors that have been documented in various threat intelligence reports and security frameworks.