CVE-2008-1609 in JAF CMS
Summary
by MITRE
Multiple PHP remote file inclusion vulnerabilities in just another flat file (JAF) CMS 4.0 RC2 allow remote attackers to execute arbitrary PHP code via a URL in the (1) website parameter to (a) forum.php, (b) headlines.php, and (c) main.php in forum/, and (2) main_dir parameter to forum/forum.php. NOTE: other main_dir vectors are already covered by CVE-2006-7127.
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Analysis
by VulDB Data Team • 10/20/2024
The vulnerability identified as CVE-2008-1609 represents a critical remote code execution flaw within the just another flat file CMS version 4.0 RC2, specifically targeting the forum module components. This vulnerability stems from improper input validation and sanitization mechanisms that fail to properly restrict user-supplied data from being directly incorporated into file inclusion operations. The affected parameters include the website parameter in forum.php, headlines.php, and main.php files within the forum directory structure, as well as the main_dir parameter in the forum/forum.php file, creating multiple attack vectors for malicious actors to exploit.
The technical exploitation of this vulnerability occurs through the manipulation of HTTP request parameters that are subsequently processed by PHP's include or require functions without adequate sanitization. When an attacker supplies a malicious URL in the vulnerable parameters, the CMS system blindly incorporates this input into file inclusion operations, allowing remote code execution capabilities. This flaw directly maps to CWE-88, which describes improper neutralization of argument delimiters in a command or injection attack, and CWE-94, which covers improper control of generation of code, both of which are fundamental to the remote code execution scenario. The vulnerability demonstrates a classic lack of input validation and output encoding that enables attackers to inject malicious payloads that get executed within the context of the web server.
The operational impact of this vulnerability is severe and far-reaching for affected systems, as it allows remote attackers to execute arbitrary PHP code on the target server with the privileges of the web application. This provides attackers with complete control over the affected system, enabling them to access sensitive data, modify content, install backdoors, or use the compromised server as a launch point for further attacks within the network. The vulnerability affects the core functionality of the CMS, particularly the forum module, which is commonly used for community engagement and content management, making it a high-value target for attackers. The exposure of multiple entry points increases the attack surface and reduces the effectiveness of basic network security controls, as the vulnerability can be exploited through various paths within the application's file structure.
Mitigation strategies for this vulnerability should include immediate patching of the affected CMS version to address the input validation flaws and implement proper parameter sanitization. Organizations should deploy web application firewalls to monitor and filter malicious requests targeting the vulnerable parameters, while also implementing proper input validation at the application level to prevent unsanitized user data from being processed in file inclusion operations. The implementation of the principle of least privilege should be enforced, ensuring that web server processes run with minimal required permissions to limit the damage from successful exploitation. Additionally, regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other applications, while adherence to secure coding practices such as those outlined in the OWASP Top Ten and MITRE ATT&CK framework should be maintained to prevent similar injection vulnerabilities from occurring in future development cycles. The vulnerability serves as a reminder of the critical importance of input validation and secure file handling practices in web application development.