CVE-2001-0189 in LocalWEB2000
Summary
by MITRE
Directory traversal vulnerability in LocalWEB2000 HTTP server allows remote attackers to read arbitrary commands via a .. (dot dot) attack in an HTTP GET request.
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Analysis
by VulDB Data Team • 02/09/2025
The CVE-2001-0189 vulnerability represents a critical directory traversal flaw in the LocalWEB2000 HTTP server implementation that fundamentally undermines web application security through improper input validation. This vulnerability operates at the core of web server file system access controls, where the server fails to adequately sanitize user-supplied input in HTTP GET requests. The flaw specifically manifests when an attacker crafts malicious URLs containing directory traversal sequences such as .. or %2e%2e, which should be rejected by the server but instead permit unauthorized access to files outside the intended web root directory. This type of vulnerability falls under the CWE-22 category of Improper Limitation of a Pathname to a Restricted Directory, commonly known as Path Traversal, which has been consistently identified as one of the most dangerous web application security flaws by industry standards.
The operational impact of this vulnerability extends far beyond simple information disclosure, as it provides attackers with the capability to execute arbitrary commands on the underlying operating system through carefully constructed HTTP requests. When the LocalWEB2000 server processes a request containing directory traversal sequences, it fails to properly validate the requested file paths, allowing attackers to navigate to sensitive system directories such as /etc, /windows, or other critical locations where configuration files, system binaries, or user data may be stored. The vulnerability enables attackers to access system files including password files, configuration databases, and potentially execute system commands through the web server interface, creating a significant attack surface that can lead to complete system compromise. This flaw directly aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter, as it allows for arbitrary command execution through the web interface.
Security professionals must understand that this vulnerability represents a fundamental failure in input validation and access control mechanisms within the LocalWEB2000 server implementation. The HTTP GET request processing logic lacks proper sanitization of path components, allowing attackers to bypass normal file system access controls through simple URL manipulation. The vulnerability demonstrates the critical importance of implementing proper path validation and access control checks in web server applications, particularly when handling user-supplied input. Organizations running affected versions of LocalWEB2000 should immediately implement mitigations including input validation, proper path resolution, and access control restrictions. The flaw also highlights the necessity of regular security assessments and the importance of adhering to secure coding practices that prevent directory traversal attacks through proper validation of all file system access requests.
The remediation approach for CVE-2001-0189 requires immediate patching of the LocalWEB2000 server software to implement proper input validation and path sanitization. System administrators should also implement web application firewalls or security modules that can detect and block directory traversal attempts in HTTP requests. Additional mitigations include restricting file system access permissions for the web server process, implementing proper directory listings restrictions, and conducting comprehensive security audits of all web server configurations. Organizations should also establish monitoring procedures to detect suspicious file access patterns and implement proper logging of all file system operations. This vulnerability serves as a critical reminder of the importance of maintaining up-to-date security patches and implementing defense-in-depth strategies that include multiple layers of protection against path traversal attacks. The incident underscores the need for regular security training for developers and system administrators to prevent similar vulnerabilities in future implementations.