CVE-2006-3158 in Eduha Meeting
Summary
by MITRE
index.php in Eduha Meeting does not properly restrict file extensions before permitting a file upload, which allows remote attackers to bypass security checks and upload or execute arbitrary php code via the add action.
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Analysis
by VulDB Data Team • 10/17/2025
The vulnerability in Eduha Meeting's index.php file represents a critical security flaw that directly violates fundamental web application security principles. This issue stems from inadequate input validation and sanitization of file upload operations, creating an environment where malicious actors can bypass intended security measures. The vulnerability specifically affects the add action functionality where file uploads are processed without proper extension validation, allowing attackers to exploit this weakness to execute arbitrary code on the target system. According to the CWE (Common Weakness Enumeration) framework, this corresponds to CWE-434 which describes "Unrestricted Upload of File with Dangerous Type," a weakness that occurs when applications allow file uploads without properly validating the file type or content.
The technical implementation of this vulnerability involves a lack of proper file extension filtering mechanisms within the application's upload handling logic. When users attempt to upload files through the add action, the system fails to verify whether the uploaded file's extension matches the expected file types, enabling attackers to upload php files with malicious code embedded within them. This flaw operates at the application layer and can be exploited remotely without requiring any special privileges or authentication. The vulnerability's impact extends beyond simple code execution to potentially allow full system compromise, as attackers can upload web shells or other malicious payloads that persist on the server. The ATT&CK framework categorizes this type of vulnerability under T1190 - Exploit Public-Facing Application, which describes techniques used to exploit vulnerabilities in externally accessible applications.
Operationally, this vulnerability creates significant risk for organizations using Eduha Meeting as their primary communication platform. Attackers can leverage this weakness to establish persistent backdoors, exfiltrate sensitive data, or disrupt services entirely. The remote execution capability means that attackers do not need physical access to the network or system, making the attack surface much broader. Organizations that rely on this platform for educational or business meetings face potential exposure of confidential information, including student records, proprietary business data, or sensitive communications. The vulnerability can be exploited through simple web requests, making it accessible to attackers with minimal technical expertise. This type of flaw often leads to extended compromise periods as malicious code remains undetected on the system, potentially allowing attackers to maintain access for months or years without detection.
Mitigation strategies should focus on implementing robust file upload validation mechanisms that enforce strict extension checking and content verification. Organizations must implement proper input sanitization, including whitelisting allowed file extensions and validating file content through multiple methods such as MIME type checking and file signature verification. The application should also implement proper access controls and file storage segregation to minimize the impact of successful exploitation attempts. Additionally, regular security assessments and penetration testing should be conducted to identify similar vulnerabilities across the entire application stack. According to industry best practices and NIST guidelines, secure coding practices must be implemented throughout the development lifecycle, including the use of secure file upload libraries and proper error handling mechanisms that do not expose system information to attackers. The implementation of web application firewalls and intrusion detection systems can also provide additional layers of protection against exploitation attempts.