CVE-2006-5473 in PHP Developer Library
Summary
by MITRE
PHP remote file inclusion vulnerability in Description.php in Softerra PHP Developer Library 1.5.3 and earlier allows remote attackers to execute arbitrary PHP code via the lib_dir parameter. NOTE: this issue is disputed by CVE as of 20061023, since there is no Description.php file included in the product, and the existing "Description" file contains documentation, not functioning code
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Analysis
by VulDB Data Team • 04/25/2026
The vulnerability identified as CVE-2006-5473 represents a disputed remote file inclusion flaw within the Softerra PHP Developer Library version 1.5.3 and earlier. This classification stems from the fundamental disagreement surrounding the existence of the specific file mentioned in the original vulnerability report. The reported issue pertains to a potential security weakness in what was purportedly a Description.php file within the library framework, which would have allowed malicious actors to inject and execute arbitrary PHP code through manipulation of the lib_dir parameter. Such vulnerabilities typically fall under the category of insecure direct object references and improper input validation, aligning with CWE-22 and CWE-94 classifications that address path traversal and code injection attacks respectively.
The technical nature of this vulnerability would have exploited the library's handling of file inclusion mechanisms, where user-supplied input directly influences the file path resolution process. When the lib_dir parameter was manipulated, it could have led to the inclusion of malicious files from remote locations, thereby enabling remote code execution. This type of flaw represents a critical security concern because it allows attackers to bypass normal access controls and potentially gain complete control over the affected system. The vulnerability's potential impact would have been significant given that PHP applications often execute with elevated privileges, making successful exploitation capable of compromising entire web applications and underlying server infrastructure.
Despite the disputed nature of this CVE, the underlying principles of remote file inclusion vulnerabilities remain highly relevant to cybersecurity practices. The incident highlights the importance of proper input validation and secure coding practices in preventing unauthorized file access. Organizations implementing PHP-based applications must ensure that all user-controllable parameters are properly sanitized and validated before being used in file inclusion operations. This vulnerability would have been particularly concerning in web environments where the application's configuration allows for dynamic file loading, as it could have enabled attackers to execute malicious code remotely without requiring authentication or physical access to the system.
The disputed status of this CVE, as noted by the official CVE assignment authority, reflects the challenges inherent in vulnerability identification and classification. The absence of the described Description.php file in the actual product distribution demonstrates how miscommunication or incorrect documentation can lead to disputed vulnerabilities. This situation underscores the necessity for thorough verification processes when assessing security vulnerabilities and emphasizes the importance of maintaining accurate and up-to-date software inventories. Security practitioners should always validate the existence of reported vulnerabilities against actual product distributions and source code to avoid false positives and ensure proper prioritization of remediation efforts. The incident also serves as a reminder of the broader security implications of improper parameter handling in web applications and the critical need for defensive programming practices that prevent arbitrary code execution through user input manipulation.