CVE-2007-2307 in WebKalk2
Summary
by MITRE
PHP remote file inclusion vulnerability in engine/engine.inc.php in WebKalk2 1.9.0 allows remote attackers to execute arbitrary PHP code via a URL in the absolute_path parameter.
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Analysis
by VulDB Data Team • 09/05/2024
The vulnerability identified as CVE-2007-2307 represents a critical remote file inclusion flaw in the WebKalk2 1.9.0 web application, specifically within the engine/engine.inc.php file. This issue stems from inadequate input validation and sanitization mechanisms that fail to properly restrict user-supplied data from being directly incorporated into file inclusion operations. The vulnerability manifests when the absolute_path parameter receives a URL value that is subsequently processed by the application's include or require functions, creating an avenue for malicious code execution.
The technical exploitation of this vulnerability occurs through the manipulation of the absolute_path parameter to reference external URLs containing malicious PHP code. When the web application processes this parameter without proper validation, it executes the remote code as if it were part of the local application, effectively granting attackers remote code execution capabilities. This flaw directly maps to CWE-88, which describes improper neutralization of special elements used in an expression, and CWE-94, which addresses improper control of generation of code, both of which are fundamental weaknesses in input validation and code execution flow control. The vulnerability's classification aligns with ATT&CK technique T1190, which covers exploit public-facing application, and T1059, which involves command and scripting interpreter, as attackers can leverage this vulnerability to execute arbitrary commands on the target system.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with complete control over the affected web server. Successful exploitation can lead to full system compromise, data exfiltration, and the establishment of persistent backdoors within the network infrastructure. The vulnerability affects the confidentiality, integrity, and availability of the web application and underlying systems, as attackers can modify application behavior, access sensitive data, and potentially use the compromised server as a launch point for further attacks against internal network resources.
Mitigation strategies for CVE-2007-2307 must focus on implementing robust input validation and sanitization measures. Organizations should immediately patch the affected WebKalk2 1.9.0 application to the latest available version that addresses this vulnerability. Additionally, administrators should implement proper parameter validation to reject any input containing URL schemes or special characters that could facilitate remote file inclusion attacks. Network-level protections such as web application firewalls can provide additional defense-in-depth measures, while disabling remote file inclusion capabilities in PHP configurations and implementing proper access controls can further reduce the attack surface. The vulnerability serves as a critical reminder of the importance of secure coding practices and input validation in preventing remote code execution vulnerabilities that can lead to complete system compromise.