CVE-2003-1089 in Zorum
Summary
by MITRE
index.php for Zorum 3.4 allows remote attackers to determine the full path of the web root via invalid parameter names, which reveals the path in a PHP error message.
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Analysis
by VulDB Data Team • 07/20/2025
The vulnerability identified as CVE-2003-1089 affects Zorum 3.4, a web-based discussion forum software that was widely used in the early 2000s for community engagement and collaboration. This security flaw represents a classic information disclosure vulnerability that exposes critical system details to unauthorized users. The vulnerability specifically resides within the index.php file, which serves as the primary entry point for the application's web interface and handles user requests through parameter processing.
The technical implementation of this vulnerability stems from improper error handling within the PHP application. When remote attackers submit malformed or invalid parameter names to the index.php script, the application fails to validate or sanitize these inputs properly before processing them. This lack of input validation causes PHP to generate error messages that inadvertently reveal the complete file system path of the web root directory. The error messages typically contain stack traces or diagnostic information that includes absolute paths, making it trivial for attackers to discover the server's directory structure and potentially identify other system components.
From an operational impact perspective, this vulnerability creates significant security risks for organizations using Zorum 3.4. The exposure of the web root path provides attackers with crucial reconnaissance information that can be leveraged for subsequent attacks. The disclosed paths may reveal directory structures that could aid in identifying other vulnerable applications or files within the same directory hierarchy. This information disclosure aligns with CWE-209, which categorizes improper error handling as a vulnerability that can lead to information exposure. The vulnerability also maps to ATT&CK technique T1212, which involves exploitation of software vulnerabilities to gain information about the target system.
The exploitation of this vulnerability requires minimal technical expertise and can be accomplished through simple HTTP requests with malformed parameters. Attackers can use automated tools or manual testing to submit various invalid parameter values and observe the error responses. The predictable nature of PHP error messages when encountering invalid parameters makes this vulnerability particularly dangerous as it provides consistent and reliable information disclosure. Organizations should consider this vulnerability as part of a broader security posture assessment, especially when legacy systems like Zorum 3.4 are still in operation.
Mitigation strategies for CVE-2003-1089 involve implementing proper input validation and error handling procedures. The most effective approach requires modifying the index.php script to sanitize all user inputs and implement custom error handling that does not expose system paths or internal application details. Organizations should configure PHP to disable error display in production environments and instead log errors to secure files. Additionally, implementing web application firewalls and input filtering mechanisms can help prevent malformed parameter submissions from reaching the vulnerable application components. The remediation process should include comprehensive testing to ensure that all parameter validation is properly implemented and that error messages do not contain sensitive path information. Regular security audits and vulnerability assessments should be conducted to identify similar information disclosure vulnerabilities in other applications within the organization's infrastructure.