CVE-2007-5146 in Der Dirigent
Summary
by MITRE
Multiple PHP remote file inclusion vulnerabilities in dedi-group Der Dirigent 1.0 allow remote attackers to execute arbitrary PHP code via a URL in the dedi_path parameter to (1) inc.generate_code.php, (2) fnc.type_forms.php, or (3) fnc.type.php in backend/inc/, or (4) frontend.php or (5) backend.php in projekt01/cms/inc/; or (6) the this_dir parameter to backend/inc/class.filemanager.php. NOTE: vectors 4 and 5 are disputed by CVE because PHP encounters a fatal function-call error on a direct request for the file, before reaching the include statement.
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Analysis
by VulDB Data Team • 08/15/2018
The vulnerability CVE-2007-5146 represents a critical remote file inclusion vulnerability affecting the dedi-group Der Dirigent 1.0 content management system. This vulnerability falls under the CWE-88 category of Improper Neutralization of Argument Delimiters in a Command, specifically manifesting as a remote code execution vector through improper input validation. The flaw exists in multiple PHP files within the application's backend and frontend directories, creating multiple attack surfaces for malicious actors to exploit. The vulnerability stems from the application's failure to properly sanitize user-supplied input before using it in file inclusion operations, allowing attackers to inject malicious URLs that get executed as PHP code on the target server.
The technical implementation of this vulnerability occurs when user input is directly incorporated into include or require statements without proper validation or sanitization. In the affected files inc.generate_code.php, fnc.type_forms.php, and fnc.type.php located in backend/inc/, attackers can manipulate the dedi_path parameter to inject arbitrary URLs. Similarly, the frontend.php and backend.php files in projekt01/cms/inc/ are vulnerable through the same parameter manipulation technique, while the class.filemanager.php file in backend/inc/ presents another vector through the this_dir parameter. These include statements effectively execute any PHP code present in the remote URLs, providing attackers with complete control over the affected server. The vulnerability operates at the application layer, exploiting the trust relationship between the web application and its included files, which is a fundamental security principle that should never be bypassed.
The operational impact of this vulnerability is severe and multifaceted, potentially allowing attackers to execute arbitrary commands on the compromised server with the privileges of the web application. This remote code execution capability enables attackers to upload additional malicious files, establish backdoors, exfiltrate sensitive data, or use the compromised server as a pivot point for further attacks within the network. The vulnerability affects the availability, integrity, and confidentiality of the targeted system, as attackers can modify or delete files, disrupt services, and gain persistent access to the compromised environment. Given that this vulnerability exists in core application functionality, it represents a critical threat to any organization relying on the dedi-group Der Dirigent 1.0 system, potentially affecting thousands of users and data assets. The impact extends beyond immediate system compromise to include potential data breaches and regulatory compliance violations.
Mitigation strategies for CVE-2007-5146 require immediate action to address the root cause of the vulnerability. The primary remediation involves implementing proper input validation and sanitization for all user-supplied parameters before they are used in file inclusion operations. This includes implementing allowlists of acceptable values, using absolute paths instead of user input for file operations, and disabling remote file inclusion features in PHP configuration. Organizations should also implement proper access controls and input filtering mechanisms at multiple layers of their infrastructure. Additionally, the affected application should be updated to a patched version or replaced with a more secure alternative. Security monitoring should be enhanced to detect suspicious file inclusion patterns, and regular security audits should be conducted to identify similar vulnerabilities in other applications. The mitigation approach should align with ATT&CK framework techniques for command and control, specifically targeting T1059.007 for remote code execution and T1190 for exploitation of remote services. Network segmentation and firewall rules should be implemented to limit access to vulnerable application components, while application firewalls can provide additional protection against malicious input patterns.