CVE-2004-1838 in xweb
Summary
by MITRE
Directory traversal vulnerability in xweb 1.0 allows remote attackers to download arbitrary files via a .. (dot dot) in the URL.
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Analysis
by VulDB Data Team • 01/04/2025
The vulnerability identified as CVE-2004-1838 represents a classic directory traversal flaw affecting xweb version 1.0, demonstrating a fundamental weakness in input validation and path handling mechanisms. This issue falls under the Common Weakness Enumeration category CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory. The vulnerability manifests when the web application fails to properly sanitize user-supplied input containing directory traversal sequences, allowing malicious actors to manipulate URL parameters to access files outside the intended web root directory. The exploitation technique leverages the standard .. (dot dot) sequence that is commonly used to navigate up directory levels in file systems, enabling attackers to bypass access controls and retrieve sensitive information from the server.
The technical implementation of this vulnerability exploits the lack of proper input validation within the xweb application's URL parsing logic. When a user submits a URL containing directory traversal sequences, the application processes these requests without adequate sanitization, allowing the .. characters to be interpreted as navigation commands rather than literal path components. This flaw enables attackers to craft malicious URLs that can traverse the file system hierarchy and access files that should remain restricted, including configuration files, source code, database files, and potentially system files. The vulnerability is particularly dangerous because it operates at the application layer, requiring no special privileges or advanced techniques beyond crafting malicious URL requests.
From an operational perspective, the impact of this directory traversal vulnerability extends beyond simple information disclosure, potentially enabling more severe attacks within the compromised system. Attackers can leverage this vulnerability to access sensitive data such as database connection strings, application configuration files, and user credentials stored in plaintext. The vulnerability also creates opportunities for further exploitation, as access to source code may reveal additional security flaws or provide insights into the application's architecture that could be used for privilege escalation or lateral movement within the network. This type of vulnerability directly impacts the confidentiality and integrity of the affected system, as unauthorized access to files can lead to data breaches and potential system compromise.
The mitigation strategies for CVE-2004-1838 should focus on implementing proper input validation and sanitization mechanisms within the xweb application. Organizations should ensure that all user-supplied input is rigorously validated and that directory traversal sequences are explicitly blocked or neutralized before processing. This includes implementing proper path resolution functions that prevent navigation outside of designated directories, using whitelist validation for acceptable file paths, and employing secure coding practices that avoid direct concatenation of user input into file system operations. Additionally, implementing proper access controls, regular security audits, and maintaining up-to-date application versions can significantly reduce the risk of exploitation. The vulnerability also highlights the importance of following security best practices outlined in industry standards such as the OWASP Top Ten and NIST cybersecurity guidelines, which emphasize the critical need for input validation and secure file handling in web applications.