CVE-2006-4716 in Fire Soft Board
Summary
by MITRE
PHP remote file inclusion vulnerability in demarrage.php in Fire Soft Board (FSB) RC3 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the racine parameter.
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Analysis
by VulDB Data Team • 07/18/2024
The vulnerability identified as CVE-2006-4716 represents a critical remote file inclusion flaw within the Fire Soft Board (FSB) software version RC3 and earlier. This vulnerability resides in the demarrage.php script which processes user input through the racine parameter without adequate validation or sanitization. The flaw enables malicious actors to inject arbitrary URLs that are then included and executed as PHP code on the target server, creating a significant security risk for web applications utilizing this forum software. The vulnerability directly maps to CWE-88, which describes improper neutralization of special elements used in an expression, and more specifically to CWE-94, which addresses the execution of code with elevated privileges. This type of vulnerability falls under the ATT&CK framework's technique T1190, which involves exploiting remote file inclusion vulnerabilities to execute malicious code on target systems.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL and passes it through the racine parameter in the demarrage.php script. The application fails to validate or sanitize this input before using it in a file inclusion operation, allowing the attacker to reference external resources that contain malicious PHP code. When the web server processes this request, it executes the remote code as if it were part of the local application, effectively granting the attacker remote code execution capabilities. This vulnerability is particularly dangerous because it can be exploited without authentication, allowing attackers to gain complete control over the affected server. The flaw demonstrates poor input validation practices and highlights the importance of implementing proper secure coding techniques to prevent such issues. The vulnerability's impact is amplified by the fact that it affects the core application functionality, potentially allowing attackers to access sensitive data, modify content, or establish persistent access to the compromised system.
The operational impact of CVE-2006-4716 extends beyond simple code execution to encompass full system compromise and potential data breaches. Attackers can leverage this vulnerability to upload backdoors, establish command and control channels, and perform reconnaissance activities within the network. The vulnerability affects organizations using older versions of FSB software, which were likely deployed in environments where proper security updates were not regularly applied. This scenario represents a common security gap in legacy systems where organizations fail to maintain current software versions, leaving them vulnerable to known exploits. The vulnerability also demonstrates the importance of input validation and the principle of least privilege in web application security. Organizations may experience reputational damage, regulatory compliance issues, and financial losses due to the exploitation of this vulnerability. The attack surface is particularly concerning for web applications that rely on dynamic file inclusion mechanisms, as this vulnerability shows how insufficient validation can lead to complete system compromise.
Mitigation strategies for CVE-2006-4716 require immediate remediation through software updates and implementation of defensive coding practices. The primary solution involves upgrading to a patched version of Fire Soft Board software that addresses the input validation flaw in demarrage.php. Organizations should implement proper input validation and sanitization techniques to prevent malicious URLs from being processed through the racine parameter. This includes using allowlists of approved values, implementing strict parameter validation, and avoiding dynamic file inclusion where possible. Security measures should also include network-level protections such as web application firewalls that can detect and block suspicious URL patterns targeting this vulnerability. Additionally, organizations should conduct regular security assessments to identify similar vulnerabilities in other applications and ensure that proper patch management processes are in place. The vulnerability underscores the importance of maintaining up-to-date software versions and implementing comprehensive security monitoring to detect and respond to exploitation attempts. Implementing proper access controls and limiting the privileges of web application processes can further reduce the potential impact of successful exploitation attempts.