CVE-2006-4051 in PHP Live Helper
Summary
by MITRE
PHP remote file inclusion vulnerability in global.php in Turnkey Web Tools PHP Live Helper 2.0 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the abs_path parameter.
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Analysis
by VulDB Data Team • 07/12/2024
The vulnerability identified as CVE-2006-4051 represents a critical remote file inclusion flaw in the Turnkey Web Tools PHP Live Helper version 2.0 and earlier. This security weakness resides within the global.php script where the abs_path parameter is improperly handled, creating an avenue for malicious actors to inject and execute arbitrary PHP code on the target system. The vulnerability stems from the application's failure to properly validate or sanitize user-supplied input before using it in file inclusion operations, which directly aligns with common web application security weaknesses documented in the CWE database under CWE-98. The flaw allows attackers to manipulate the abs_path parameter to point to remote malicious files, effectively enabling remote code execution through the vulnerable application.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL containing PHP code and passes it as the abs_path parameter to the global.php script. The application processes this input without adequate sanitization, leading to the inclusion of the attacker-controlled remote file. This process leverages the PHP include or require functions, which are designed to incorporate external files into the executing script. When these functions receive untrusted input, they become vectors for code injection attacks. The vulnerability specifically affects the Turnkey Web Tools PHP Live Helper 2.0 and earlier versions, indicating that this was a known issue that required patching but was present in multiple iterations of the software. The attack vector is particularly dangerous because it allows remote code execution without requiring authentication or prior access to the system, making it a severe threat to web application security.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with complete control over the affected web server. Once exploited, malicious actors can upload additional malware, establish backdoors, modify or delete sensitive data, and potentially use the compromised system as a launching point for further attacks within the network. This vulnerability can be classified under the ATT&CK framework's T1190 technique for exploiting vulnerabilities in remote services, and specifically relates to T1059 for executing commands through the system. The consequences for organizations using vulnerable versions of PHP Live Helper include potential data breaches, system compromise, and regulatory compliance violations. The vulnerability also demonstrates the importance of proper input validation and the principle of least privilege in web application security, as it shows how a single unvalidated parameter can lead to complete system compromise.
Mitigation strategies for CVE-2006-4051 focus on immediate remediation through software updates and proper input validation implementation. Organizations should immediately upgrade to versions of PHP Live Helper that address this vulnerability, as the developers likely released patches to fix the insecure parameter handling. The recommended approach involves implementing strict input validation and sanitization for all user-supplied parameters, particularly those used in file inclusion operations. Security measures should include disabling remote file inclusion features in PHP configuration, using allow_url_include = Off in php.ini, and implementing proper parameter validation using whitelisting techniques. Additionally, network-level protections such as web application firewalls and intrusion detection systems can help detect and block exploitation attempts. The vulnerability also highlights the necessity of regular security assessments and vulnerability scanning to identify similar issues in legacy applications, as well as the importance of following secure coding practices that prevent improper input handling and file inclusion operations from becoming attack vectors.