CVE-2004-1646 in Xedus
Summary
by MITRE
Directory traversal vulnerability in Xedus 1.0 allows remote attackers to read arbitrary files via a .. (dot dot) in the URL.
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Analysis
by VulDB Data Team • 10/13/2025
The vulnerability described in CVE-2004-1646 represents a classic directory traversal flaw affecting the Xedus 1.0 web application. This security weakness resides in how the application processes Uniform Resource Locator requests, specifically failing to properly validate or sanitize input containing directory navigation sequences. The vulnerability enables malicious actors to access files outside the intended web root directory by exploiting the .. (dot dot) notation commonly used to navigate up directory levels in file systems. Such flaws typically arise from inadequate input validation mechanisms that do not properly filter or sanitize user-supplied data before processing.
The technical implementation of this vulnerability stems from the application's failure to implement proper path validation controls. When a URL contains directory traversal sequences such as ../ or ..\, the web server or application should reject such requests or normalize the paths to prevent access to unauthorized file system locations. However, Xedus 1.0 lacks these protective measures, allowing attackers to construct malicious URLs that traverse the file system hierarchy. This type of vulnerability is classified under CWE-22 - Improper Limitation of a Pathname to a Restricted Directory, which is a fundamental weakness in input validation and access control mechanisms. The flaw operates at the application layer where user input directly influences file system operations, making it particularly dangerous as it can lead to unauthorized data access, system compromise, or information disclosure.
The operational impact of this vulnerability extends beyond simple file access, as it can enable attackers to retrieve sensitive configuration files, database credentials, application source code, or other confidential information stored on the server. Remote attackers can exploit this weakness without requiring authentication, making it particularly severe from a security perspective. The vulnerability aligns with ATT&CK technique T1083 - File and Directory Discovery, where adversaries seek to understand the file system structure and identify valuable targets. Organizations running Xedus 1.0 are at risk of data breaches, intellectual property theft, and potential system compromise. The ease of exploitation makes this vulnerability particularly attractive to threat actors, as it requires minimal technical skill to leverage and can provide substantial information gain.
Mitigation strategies for this vulnerability must address the core input validation failure in the application. The primary defense involves implementing robust path validation that filters or rejects any input containing directory traversal sequences before processing. This can be achieved through input sanitization, canonicalization of file paths, and enforcement of strict access controls that prevent traversal beyond designated directories. Organizations should also implement proper web application firewalls that can detect and block malicious path traversal attempts. Additionally, regular security audits and code reviews should be conducted to identify similar vulnerabilities in other applications. The remediation approach aligns with security best practices outlined in OWASP Top Ten and NIST guidelines for web application security, emphasizing the importance of input validation and proper access control mechanisms. System administrators should also consider implementing principle of least privilege access controls and regular security updates to prevent exploitation of known vulnerabilities.