CVE-2015-2862 in Virtual System Administrator
Summary
by MITRE
Directory traversal vulnerability in Kaseya Virtual System Administrator (VSA) 7.x before 7.0.0.29, 8.x before 8.0.0.18, 9.0 before 9.0.0.14, and 9.1 before 9.1.0.4 allows remote authenticated users to read arbitrary files via a crafted HTTP request.
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Analysis
by VulDB Data Team • 07/04/2025
The CVE-2015-2862 vulnerability represents a critical directory traversal flaw within Kaseya Virtual System Administrator (VSA) versions across multiple release lines including 7.x, 8.x, 9.0, and 9.1. This vulnerability resides in the web application layer of the VSA platform, which serves as a comprehensive remote monitoring and management solution for IT infrastructure. The flaw allows authenticated attackers to manipulate file path parameters in HTTP requests to access files outside the intended directory structure, potentially exposing sensitive system information, configuration files, and user data. This vulnerability specifically affects versions prior to the security patches released in 7.0.0.29, 8.0.0.18, 9.0.0.14, and 9.1.0.4 respectively, indicating that the issue was present across a broad range of the product's lifecycle.
The technical implementation of this directory traversal vulnerability stems from inadequate input validation and path sanitization within the VSA web interface. When authenticated users submit HTTP requests containing specially crafted file path parameters, the application fails to properly validate or sanitize these inputs before processing file operations. This allows attackers to manipulate directory traversal sequences such as "../" or similar constructs to navigate outside the intended file system boundaries. The vulnerability is classified as a CWE-22 - Improper Limitation of a Pathname to a Restricted Directory, which is a well-documented weakness in web application security. The flaw essentially permits attackers to bypass normal file access controls and retrieve arbitrary files from the server filesystem, potentially including system configuration files, database files, and sensitive user data stored within the VSA environment.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the ability to gain unauthorized access to critical system components within the VSA environment. Remote authenticated attackers who can establish a valid session with the VSA system can leverage this vulnerability to extract configuration files that may contain database connection strings, encryption keys, and administrative credentials. The exposure of such sensitive information creates a significant risk of further compromise, as attackers could potentially use the extracted credentials to escalate privileges or gain access to other systems within the network that rely on the VSA platform for monitoring and management. This vulnerability aligns with ATT&CK technique T1083 - File and Directory Discovery, which describes methods used by adversaries to enumerate files and directories on compromised systems, and T1078 - Valid Accounts, which involves the use of legitimate credentials to gain access to systems and resources.
Organizations utilizing affected Kaseya VSA versions should prioritize immediate remediation through the application of vendor-provided security patches. The vulnerability affects multiple major release lines, indicating that it was a persistent issue that required patching across several version branches. Security administrators should implement comprehensive network monitoring to detect suspicious HTTP request patterns that might indicate exploitation attempts, particularly focusing on unusual directory traversal sequences in web logs. Additionally, implementing principle of least privilege access controls and regular security audits of VSA configurations can help mitigate the potential impact of such vulnerabilities. The vulnerability demonstrates the importance of proper input validation and secure coding practices in web applications, as outlined in OWASP Top Ten security principles and the CWE classification system that specifically addresses improper limitation of pathname traversal. Organizations should also consider implementing web application firewalls and intrusion detection systems to provide additional layers of protection against similar directory traversal attacks targeting other network services and applications.