CVE-2002-0897 in LocalWEB2000
Summary
by MITRE
LocalWEB2000 2.1.0 web server allows remote attackers to bypass access restrictions for restricted files via a URL that contains the "/./" directory.
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Analysis
by VulDB Data Team • 09/12/2025
The vulnerability identified as CVE-2002-0897 affects LocalWEB2000 version 2.1.0 web server implementation, representing a classic path traversal attack vector that exploits improper input validation mechanisms. This security flaw resides in the server's handling of Uniform Resource Locators containing the "/./" directory sequence, which should normally be interpreted as a reference to the current directory in file system operations. The vulnerability stems from the web server's failure to properly canonicalize or sanitize URL paths before processing file requests, allowing malicious actors to manipulate the request structure to access files that should otherwise be restricted or protected.
The technical exploitation of this vulnerability occurs when an attacker crafts a URL containing the "/./" sequence to bypass access controls that are typically enforced by the web server. This specific directory traversal technique leverages the fact that many web servers do not adequately normalize path references, allowing the "/./" sequence to be processed as a legitimate directory reference rather than being properly resolved to the current directory. The flaw enables unauthorized access to restricted files, potentially exposing sensitive data, configuration files, or system resources that should remain protected from external access.
From an operational impact perspective, this vulnerability presents significant security implications for systems running LocalWEB2000 2.1.0, as it allows remote attackers to gain access to files that are normally protected by access controls. The consequences can range from information disclosure of sensitive configuration data to potential system compromise through access to system files or application resources. The vulnerability is particularly concerning because it operates at the web server level and can be exploited without requiring any authentication or privileged access, making it an attractive target for automated attacks. This type of vulnerability directly violates the principle of least privilege and can lead to complete system compromise if sensitive files containing passwords, database connection strings, or system configurations are accessible through the path traversal.
The vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. This weakness allows attackers to access files and directories that are stored outside the web root folder, potentially leading to unauthorized information disclosure, system compromise, or denial of service. The attack vector specifically relates to the improper handling of directory references in URL parsing, where the web server fails to properly resolve the path before accessing the file system. From an ATT&CK framework perspective, this vulnerability maps to technique T1566.001, which covers the exploitation of remote services through directory traversal attacks, and T1078, which addresses valid accounts usage for persistence and privilege escalation.
Mitigation strategies for CVE-2002-0897 should include immediate patching of the LocalWEB2000 web server to a version that properly handles path normalization and input validation. Organizations should implement proper URL sanitization at the web server level, ensuring that all incoming requests are properly canonicalized before any file system operations are performed. Network-level protections such as web application firewalls can provide additional defense in depth, though the most effective solution remains the application of vendor patches. Additionally, implementing proper access controls, regular security audits, and monitoring for unusual file access patterns can help detect and prevent exploitation attempts. System administrators should also consider implementing directory restrictions and limiting the web server's access to only necessary directories to minimize the potential impact of such vulnerabilities.