CVE-2006-4365 in VistaBB
Summary
by MITRE
Multiple PHP remote file inclusion vulnerabilities in VistaBB 2.0.33 and earlier allow remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter in (1) includes/functions_mod_user.php or (2) includes/functions_portal.php.
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Analysis
by VulDB Data Team • 07/15/2024
The vulnerability identified as CVE-2006-4365 represents a critical remote file inclusion flaw affecting VistaBB versions 2.0.33 and earlier. This issue stems from improper input validation within the application's core functionality, specifically in two key files that handle user and portal operations. The vulnerability manifests when the application fails to properly sanitize user-supplied input passed through the phpbb_root_path parameter, creating an exploitable condition that allows remote attackers to inject malicious URLs into the application's execution flow.
The technical implementation of this vulnerability aligns with CWE-88, which describes improper neutralization of special elements used in an OS command, and more specifically CWE-94, which addresses the execution of arbitrary code due to insufficient input validation. Attackers can leverage this weakness by crafting malicious URLs and injecting them into the phpbb_root_path parameter within the targeted files. When the application processes these parameters without adequate sanitization, it attempts to include and execute the remote files specified in the URL, effectively granting attackers the ability to execute arbitrary PHP code on the vulnerable system. This represents a classic remote code execution vulnerability that can be exploited to gain complete control over the affected server.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with direct access to execute malicious code on the web server hosting the vulnerable VistaBB installation. The exploitation process typically follows the ATT&CK technique T1190, which involves using vulnerabilities in remote services to gain initial access. Once successful, attackers can establish persistent backdoors, escalate privileges, and potentially use the compromised system as a launchpad for further attacks within the network. The vulnerability affects the confidentiality, integrity, and availability of the affected system, as attackers can modify content, steal sensitive data, or disrupt service operations.
Mitigation strategies for this vulnerability should prioritize immediate patching of the affected VistaBB installations to version 2.0.34 or later, which contains the necessary security fixes. Network administrators should implement proper input validation and sanitization measures, particularly for parameters that control file inclusion operations. The principle of least privilege should be enforced by restricting web server access to only necessary directories and files. Additionally, implementing web application firewalls and intrusion detection systems can help detect and prevent exploitation attempts. Regular security audits and vulnerability assessments should be conducted to identify similar weaknesses in other applications and systems within the organization's infrastructure.