CVE-2007-3271 in YourFreeScreamer
Summary
by MITRE
PHP remote file inclusion vulnerability in templates/2blue/bodyTemplate.php in YourFreeScreamer 1.0 allows remote attackers to execute arbitrary PHP code via a URL in the serverPath parameter.
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Analysis
by VulDB Data Team • 09/21/2024
The vulnerability identified as CVE-2007-3271 represents a critical remote file inclusion flaw within the YourFreeScreamer 1.0 web application, specifically affecting the templates/2blue/bodyTemplate.php file. This vulnerability resides in the application's handling of user-supplied input through the serverPath parameter, which is processed 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, effectively allowing for remote code execution. The vulnerability's classification as a remote file inclusion issue places it within the purview of CWE-88, which addresses improper neutralization of special elements used in an input command, and specifically relates to CWE-94, which encompasses the execution of arbitrary code or commands. The attack vector leverages the application's trust in user input, where the serverPath parameter is directly incorporated into file inclusion operations without proper security checks.
The technical exploitation of this vulnerability requires an attacker to craft a malicious URL that targets the vulnerable serverPath parameter within the bodyTemplate.php file. When the application processes this parameter, it performs a file inclusion operation that loads and executes the remote content, thereby granting the attacker complete control over the affected system. This type of vulnerability is particularly dangerous because it can be exploited through various means including web browser-based attacks, API calls, or even automated scanning tools that specifically target known patterns of remote file inclusion vulnerabilities. The flaw demonstrates a fundamental lack of input validation and proper parameter sanitization, which are core principles of secure coding practices and align with ATT&CK technique T1059.007 for execution through PHP. The vulnerability's impact is amplified by the fact that it allows for arbitrary code execution, which can lead to complete system compromise, data exfiltration, or the establishment of persistent backdoors.
The operational impact of CVE-2007-3271 extends far beyond simple code execution, as it provides attackers with comprehensive control over the affected web server and potentially the entire underlying infrastructure. Once exploited, an attacker can install malware, steal sensitive data, modify existing files, create new user accounts, or establish command and control channels for further malicious activities. The vulnerability affects the confidentiality, integrity, and availability of the web application and the systems it operates on, creating a significant risk for organizations relying on the affected software. The exploitability of this vulnerability is relatively straightforward, requiring minimal technical expertise to execute successfully, which increases the likelihood of widespread exploitation. Organizations using YourFreeScreamer 1.0 are particularly vulnerable as this is a known legacy application with no active security updates, making it an attractive target for automated scanning and exploitation campaigns. The vulnerability also represents a failure in the application's security architecture, as it does not implement proper input validation or secure coding practices that would prevent such dangerous parameter handling.
Mitigation strategies for CVE-2007-3271 should focus on immediate remediation through input validation, parameter sanitization, and secure coding practices. The primary solution involves implementing strict validation of all user-supplied input, particularly parameters used in file inclusion operations, and ensuring that only predefined, trusted values are accepted. Organizations should implement proper input filtering mechanisms that reject any input containing URLs or special characters that could be used for file inclusion attacks. The application should be updated to use absolute paths for file inclusion operations rather than allowing relative paths or URLs to be passed through parameters. Security measures should include disabling the ability to include remote files through configuration settings, implementing proper access controls, and applying the principle of least privilege to file operations. Additionally, organizations should consider implementing web application firewalls to detect and block malicious requests attempting to exploit this vulnerability, and conduct regular security assessments to identify similar flaws in other applications. The remediation approach must align with established security frameworks such as the OWASP Top Ten and NIST cybersecurity guidelines, which emphasize the importance of input validation and secure coding practices as fundamental defenses against such vulnerabilities.