CVE-2000-0240 in vqServer
Summary
by MITRE
vqSoft vqServer program allows remote attackers to read arbitrary files via a /........../ in the URL, a variation of a .. (dot dot) attack.
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Analysis
by VulDB Data Team • 06/15/2025
The vulnerability identified as CVE-2000-0240 resides within the vqSoft vqServer program, representing a classic directory traversal attack vector that enables remote adversaries to access arbitrary files on the affected system. This flaw manifests through the manipulation of URL paths using sequences of dots and forward slashes in the form of /........../ which effectively bypasses normal file access controls and allows unauthorized file retrieval. The vulnerability operates by exploiting insufficient input validation mechanisms within the web server's path resolution logic, permitting attackers to navigate beyond the intended document root directory and access files that should remain restricted.
This directory traversal vulnerability falls under the Common Weakness Enumeration category CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The attack leverages the fundamental weakness in how the vqServer processes URL components, where the application fails to properly sanitize or validate the path parameters before using them to access filesystem resources. The technique employed involves crafting malicious URLs that contain multiple directory traversal sequences that, when processed by the vulnerable application, result in the resolution of paths that extend beyond the intended application boundaries.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the ability to read sensitive files such as configuration files, database files, system credentials, and potentially executable code that could lead to further system compromise. Remote attackers can leverage this vulnerability without requiring authentication, making it particularly dangerous as it can be exploited from any network location. The attack chain typically involves sending a specially crafted HTTP request containing the malicious path traversal sequence, which when processed by the vulnerable vqServer application results in the disclosure of unauthorized files from the server's filesystem.
From an adversary perspective, this vulnerability aligns with techniques documented in the MITRE ATT&CK framework under the T1083 - File and Directory Discovery tactic, where attackers seek to enumerate file systems and identify sensitive data. The exploitation of this vulnerability demonstrates how inadequate input validation can create persistent security weaknesses that remain exploitable across multiple versions of affected software. Organizations running vulnerable versions of vqServer face significant risk as this attack can be automated and does not require sophisticated tools or deep technical knowledge to execute successfully. The vulnerability also highlights the importance of implementing proper input sanitization and access control mechanisms, particularly in web applications that handle file system operations, as the attack can result in complete compromise of the affected system's data integrity and confidentiality.
Mitigation strategies for this vulnerability require immediate implementation of input validation controls that properly sanitize URL path parameters, ensuring that directory traversal sequences are either rejected or properly resolved within the intended application boundaries. System administrators should implement proper access controls and file permissions that limit the impact of successful exploitation attempts. Additionally, deploying web application firewalls and implementing proper network segmentation can help reduce the attack surface and limit the potential damage from such vulnerabilities. The remediation process should include updating to patched versions of vqServer and conducting thorough security assessments to identify similar vulnerabilities within the organization's web applications.