CVE-2006-7147 in Import Tools
Summary
by MITRE
PHP remote file inclusion vulnerability in includes/functions_mod_user.php in phpBB Import Tools Mod 0.1.4 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter.
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Analysis
by VulDB Data Team • 07/28/2024
The vulnerability identified as CVE-2006-7147 represents a critical remote file inclusion flaw within the phpBB Import Tools Mod version 0.1.4 and earlier installations. This security weakness resides in the includes/functions_mod_user.php file, where improper input validation allows malicious actors to inject arbitrary URLs into the phpbb_root_path parameter. The vulnerability stems from the application's failure to properly sanitize user-supplied input before using it in file inclusion operations, creating an attack vector that can be exploited from remote locations without requiring authentication or privileged access.
This flaw manifests as a remote code execution vulnerability that aligns with CWE-94, which specifically addresses the execution of arbitrary code or commands. The technical implementation involves the mod_user.php file directly incorporating user-provided data into file path operations without adequate sanitization or validation checks. Attackers can leverage this vulnerability by crafting malicious URLs that, when passed through the phpbb_root_path parameter, cause the application to include and execute remote PHP files. The vulnerability operates under the broader category of insecure direct object references and improper input validation, making it particularly dangerous as it allows for complete system compromise when exploited successfully.
The operational impact of CVE-2006-7147 extends far beyond simple data theft, as it provides attackers with complete control over affected systems. Once exploited, adversaries can execute arbitrary PHP code on the target server, potentially leading to full system compromise, data exfiltration, and the establishment of persistent backdoors. The vulnerability affects all versions of the phpBB Import Tools Mod up to and including version 0.1.4, making it a widespread concern for organizations running outdated phpBB installations. This type of vulnerability directly maps to ATT&CK technique T1190, which covers the exploitation of remote services through the execution of malicious code, and T1059, which involves the execution of commands through the use of scripting languages.
Mitigation strategies for this vulnerability require immediate patching of the affected phpBB Import Tools Mod to version 0.1.5 or later, which includes proper input validation and sanitization measures. Organizations should implement strict input validation at all points where user data is processed, particularly in file inclusion operations. The recommended approach includes implementing whitelisting mechanisms for path parameters, using absolute paths instead of relative ones, and employing proper escape sequences to prevent malicious input from being interpreted as executable code. Additionally, network segmentation and firewall rules should be configured to restrict access to administrative functions and file inclusion endpoints. Security monitoring should be enhanced to detect suspicious file inclusion patterns and anomalous network traffic that might indicate exploitation attempts. The vulnerability also underscores the importance of keeping all third-party components updated and regularly auditing code for insecure practices such as dynamic file inclusion without proper validation.