CVE-2004-0327 in PhpNewsManager
Summary
by MITRE
Directory traversal vulnerability in functions.php in PhpNewsManager 1.46 allows remote attackers to retrieve arbitrary files via .. (dot dot) sequences in the clang parameter.
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Analysis
by VulDB Data Team • 07/13/2025
The vulnerability identified as CVE-2004-0327 represents a classic directory traversal flaw within the PhpNewsManager 1.46 web application. This issue resides in the functions.php file where the clang parameter is processed without adequate input validation or sanitization. The vulnerability stems from the application's failure to properly restrict file access when handling user-supplied input containing directory traversal sequences. Attackers can exploit this weakness by crafting malicious URLs that include .. (dot dot) sequences in the clang parameter, enabling them to navigate the file system and access files outside the intended directory structure. This type of vulnerability falls under the CWE-22 category, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The vulnerability exposes the underlying system to unauthorized file access and could potentially lead to sensitive information disclosure, system compromise, or further exploitation opportunities.
The technical implementation of this vulnerability demonstrates a fundamental flaw in input validation practices within the web application's codebase. When the clang parameter is processed in functions.php, the application does not perform proper sanitization or validation of the input before using it in file system operations. This lack of input filtering creates an opportunity for attackers to manipulate the file access paths through the use of relative path references such as ../ or ../../ sequences. The exploitation process typically involves sending a specially crafted HTTP request containing the malicious parameter value that bypasses normal file access controls. The vulnerability is particularly dangerous because it allows attackers to potentially access configuration files, database credentials, source code, or other sensitive system files that should remain protected from external access. This weakness directly relates to the ATT&CK technique T1213.002 which involves data from information repositories, specifically targeting the exploitation of path traversal vulnerabilities to gain unauthorized access to system files.
The operational impact of CVE-2004-0327 extends beyond simple information disclosure to potentially enable more severe compromise scenarios within the affected environment. An attacker who successfully exploits this vulnerability can retrieve arbitrary files from the web server's file system, which may include database connection strings, administrative credentials, application configuration files, or even source code that could reveal additional vulnerabilities. The exposure of sensitive files could lead to privilege escalation opportunities, allowing attackers to gain administrative access to the web application or underlying system. In some cases, this vulnerability could serve as a stepping stone for further attacks, enabling the exploitation of other weaknesses within the same system. The impact is particularly severe in environments where the web application runs with elevated privileges or where sensitive data is stored in accessible locations. Organizations using PhpNewsManager 1.46 are at risk of unauthorized data access and potential system compromise, especially if the application has access to sensitive directories or files. The vulnerability's remote nature means that attackers do not require local system access or credentials to exploit it, making it particularly dangerous for publicly accessible web applications.
Mitigation strategies for CVE-2004-0327 should focus on implementing proper input validation and sanitization measures within the application code. The most effective approach involves implementing strict input validation for all parameters that are used in file system operations, particularly those that could be manipulated to contain directory traversal sequences. Organizations should implement whitelisting mechanisms that only allow predefined, safe values for the clang parameter, or employ proper path normalization techniques that strip out or encode dangerous characters. The application should validate that file paths do not contain sequences such as .. or // that could be used to traverse directories. Additionally, implementing proper access controls and privilege separation ensures that the web application does not have unnecessary access to sensitive system directories. System administrators should also consider implementing web application firewalls that can detect and block suspicious patterns in HTTP requests, including directory traversal attempts. Regular security audits and code reviews should be conducted to identify similar vulnerabilities in other parts of the application or related systems. The remediation process should also include updating to the latest version of PhpNewsManager or implementing proper patch management procedures to address the vulnerability. Organizations should also implement monitoring and logging mechanisms to detect potential exploitation attempts and establish incident response procedures for handling such security events. The vulnerability serves as a reminder of the importance of secure coding practices and input validation in preventing directory traversal attacks, which remain a common and dangerous class of web application security flaws.