CVE-2006-6566 in mxBB
Summary
by MITRE
PHP remote file inclusion vulnerability in includes/profilcp_constants.php in the Profile Control Panel (CPanel) module for mxBB 0.91c allows remote attackers to execute arbitrary PHP code via a URL in the module_root_path parameter.
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Analysis
by VulDB Data Team • 08/11/2024
The vulnerability identified as CVE-2006-6566 represents a critical remote file inclusion flaw within the mxBB 0.91c forum software's Profile Control Panel module. This security weakness resides in the includes/profilcp_constants.php file where improper input validation allows malicious actors to inject arbitrary URLs into the module_root_path parameter. The flaw enables attackers to execute arbitrary PHP code on the target server, fundamentally compromising the system's integrity and confidentiality. This type of vulnerability falls under the category of insecure direct object references and represents a classic example of how insufficient parameter validation can lead to remote code execution. The vulnerability is particularly dangerous because it allows attackers to leverage remote resources and execute malicious code without requiring authentication or local access to the system.
The technical implementation of this vulnerability exploits the lack of proper input sanitization within the mxBB framework. When the module_root_path parameter is processed, the application fails to validate or sanitize user-supplied input before using it in file inclusion operations. This creates an opportunity for attackers to inject malicious URLs that point to remote servers hosting malicious PHP scripts. The vulnerability is classified as CWE-98, which specifically addresses "Improper Control of Generation of Code ('Code Injection')" and aligns with ATT&CK technique T1190, "Exploit Public-Facing Application," where adversaries target web applications to gain unauthorized access. The flaw demonstrates how web applications can be exploited through parameter manipulation when they directly incorporate user input into file operations without proper validation or sanitization measures.
The operational impact of this vulnerability extends far beyond simple code execution capabilities. Successful exploitation allows attackers to gain full control over the affected web server, potentially enabling them to install backdoors, exfiltrate sensitive data, modify website content, or use the compromised server as a launch point for further attacks against the internal network. The vulnerability affects the entire mxBB 0.91c user base and represents a significant risk to organizations relying on this forum software. Attackers can leverage this flaw to compromise multiple systems simultaneously, especially in environments where multiple forums or applications share similar codebases. The vulnerability also exposes the underlying architecture to additional risks including data breaches, service disruption, and potential lateral movement within compromised networks.
Mitigation strategies for CVE-2006-6566 must address both immediate remediation and long-term architectural improvements. The primary solution involves implementing strict input validation and sanitization for all user-supplied parameters, particularly those used in file inclusion operations. Organizations should disable remote file inclusion features entirely and enforce local file paths only when processing module parameters. Security patches should be applied immediately to upgrade to patched versions of mxBB, as the vulnerability has been well-documented and remediated. Additional protective measures include implementing web application firewalls to monitor and block suspicious requests, enabling proper input validation at multiple layers, and conducting regular security audits of web applications. The vulnerability also underscores the importance of following secure coding practices and adhering to security standards such as those outlined in the OWASP Top Ten and NIST cybersecurity guidelines to prevent similar issues in future development cycles.