CVE-2015-4031 in NetChart
Summary
by MITRE
Directory traversal vulnerability in saveFile.jsp in the development installation in Visual Mining NetChart allows remote attackers to write to arbitrary files via unspecified vectors.
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Analysis
by VulDB Data Team • 05/19/2022
The vulnerability identified as CVE-2015-4031 represents a critical directory traversal flaw within the Visual Mining NetChart application's development installation. This security weakness specifically affects the saveFile.jsp component, which is designed to handle file operations within the application's web interface. The vulnerability stems from inadequate input validation and improper file path handling mechanisms that fail to properly sanitize user-supplied data before processing file operations. Attackers can exploit this weakness to manipulate the file system by crafting malicious requests that bypass normal access controls and write files to arbitrary locations on the server. The issue is particularly concerning because it exists within a development installation, which typically contains sensitive configuration files, source code, or other data that should remain protected from unauthorized access.
The technical implementation of this directory traversal vulnerability occurs when the saveFile.jsp script processes file operations without sufficient validation of the file paths provided by users. This allows attackers to inject malicious path sequences such as ../ or ..\ that traverse up the directory structure and gain access to files outside the intended application directory. The unspecified vectors mentioned in the description indicate that multiple attack pathways may exist, potentially including parameter manipulation, header injection, or other input fields that are processed by the vulnerable component. This type of vulnerability falls under the CWE-22 category, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The vulnerability demonstrates a fundamental flaw in input sanitization and access control mechanisms that should prevent unauthorized file system access.
The operational impact of CVE-2015-4031 extends beyond simple unauthorized file access, as it can enable attackers to write malicious files to critical system locations. This capability allows for persistent code execution, data exfiltration, and potential system compromise through the introduction of backdoors or other malicious payloads. The development installation context is particularly dangerous because it often contains sensitive information such as database credentials, application source code, or configuration details that could be exploited to escalate privileges or gain deeper system access. Attackers could leverage this vulnerability to modify application behavior, inject malicious code into the web application, or establish persistent access points for future exploitation. The vulnerability's presence in a development environment also raises concerns about potential information disclosure, as these installations often contain unreleased code versions, test data, or debugging information that should remain confidential.
Mitigation strategies for this directory traversal vulnerability must address both the immediate security flaw and broader architectural weaknesses. Organizations should implement strict input validation and sanitization mechanisms that enforce proper file path handling and reject any attempts to traverse directories using special sequences. The recommended approach includes implementing a whitelist-based file access control system that only allows operations within predefined safe directories and file types. Additionally, the application should be configured to run with minimal privileges and utilize proper access controls to prevent unauthorized file system modifications. Security measures should include regular code reviews, implementation of secure coding practices, and deployment of web application firewalls to detect and block malicious requests. The vulnerability also highlights the importance of proper application environment segregation, ensuring that development installations are properly secured and not exposed to untrusted networks, as recommended by the ATT&CK framework's privilege escalation and persistence tactics. Organizations should also implement comprehensive monitoring and logging of file system operations to detect unauthorized access attempts and maintain audit trails for security incident response.