CVE-2006-4159 in Chaussette
Summary
by MITRE
Multiple PHP remote file inclusion vulnerabilities in Chaussette 080706 and earlier allow remote attackers to execute arbitrary PHP code via a URL in the _BASE parameter to scripts in Classes/ including (1) Evenement.php, (2) Event.php, (3) Event_for_month.php, (4) Event_for_week.php, (5) My_Log.php, (6) My_Smarty.php, and possibly (7) Event_for_month_per_day.php.
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Analysis
by VulDB Data Team • 07/13/2024
The vulnerability identified as CVE-2006-4159 represents a critical remote file inclusion flaw affecting the Chaussette content management system version 080706 and earlier. This vulnerability resides within the application's handling of user-supplied input through the _BASE parameter, which is processed by multiple script files within the Classes/ directory structure. The flaw allows malicious actors to inject arbitrary URLs that are then included and executed as PHP code on the target server, creating a severe security risk that can lead to complete system compromise.
The technical implementation of this vulnerability stems from improper input validation and sanitization within the Chaussette application's script execution flow. When the application processes the _BASE parameter without adequate validation, it directly incorporates user-supplied URLs into the include statement, enabling attackers to reference external malicious code repositories. This pattern aligns with CWE-829, which describes insecure inclusion of dynamic code, and represents a classic example of remote code execution through file inclusion vulnerabilities. The affected files including Evenement.php, Event.php, Event_for_month.php, Event_for_week.php, My_Log.php, and My_Smarty.php all share this common input handling weakness, making the attack surface particularly broad across the application's functionality.
The operational impact of this vulnerability extends far beyond simple code execution, as it provides attackers with complete control over the affected server environment. Successful exploitation can result in unauthorized data access, system compromise, backdoor installation, and potential lateral movement within network infrastructure. Attackers can leverage this vulnerability to establish persistent access, exfiltrate sensitive information, or use the compromised server as a launch point for further attacks against other systems. The vulnerability's remote nature means that attackers do not require physical access or local credentials to exploit the flaw, making it particularly dangerous in publicly accessible web environments. This aligns with ATT&CK technique T1190, which describes exploitation of remote services, and T1059, which covers execution through scripting languages.
Mitigation strategies for CVE-2006-4159 should prioritize immediate patching of the Chaussette application to version 080707 or later, which contains the necessary fixes for the remote file inclusion vulnerability. System administrators should implement input validation measures that prevent user-supplied URLs from being processed in include statements, utilizing parameterized inputs and strict validation of all external references. Network-level protections such as web application firewalls and intrusion detection systems can provide additional defense-in-depth measures, while disabling remote file inclusion features in PHP configurations can prevent similar vulnerabilities from occurring in other applications. Organizations should also conduct comprehensive security assessments of their web applications to identify and remediate similar input validation flaws that may exist in other components of their infrastructure, following the principles outlined in the OWASP Top Ten and NIST cybersecurity frameworks to ensure robust protection against remote code execution threats.