CVE-2007-1133 in fcring
Summary
by MITRE
PHP remote file inclusion vulnerability in fcring.php in FCRing 1.3 allows remote attackers to execute arbitrary PHP code via a URL in the s_fuss parameter.
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Analysis
by VulDB Data Team • 08/25/2024
The vulnerability identified as CVE-2007-1133 represents a critical remote file inclusion flaw in the FCRing 1.3 web application that exposes systems to arbitrary code execution attacks. This vulnerability specifically affects the fcring.php script where the s_fuss parameter is processed without proper input validation or sanitization. The flaw enables malicious actors to inject and execute arbitrary PHP code by manipulating the s_fuss parameter with a malicious URL, effectively allowing remote code execution on the targeted server. This type of vulnerability falls under the category of insecure direct object references and improper input validation, commonly classified as CWE-98 and CWE-20 respectively within the Common Weakness Enumeration framework.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL and passes it through the s_fuss parameter to the vulnerable fcring.php script. The application fails to validate or sanitize the input, allowing the PHP interpreter to treat the malicious URL as a legitimate file path and include it in the execution context. This creates a dangerous situation where attacker-controlled code can be executed with the privileges of the web server process, potentially leading to complete system compromise. The vulnerability demonstrates poor input handling practices and lacks proper parameter validation mechanisms that would normally prevent such malicious input from being processed.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a foothold for further exploitation within the target environment. Once remote code execution is achieved, attackers can establish persistent access, escalate privileges, and potentially use the compromised system as a launch point for attacking other systems within the network. The vulnerability's remote nature means that exploitation can occur from anywhere on the internet without requiring local access or authentication. This makes it particularly dangerous for web applications that are exposed to public networks and can result in data breaches, service disruption, and complete system compromise according to the MITRE ATT&CK framework's execution and persistence tactics.
Mitigation strategies for this vulnerability require immediate implementation of proper input validation and sanitization measures. The most effective approach involves removing the vulnerable include functionality or implementing strict parameter validation that rejects any input containing URLs or external references. Organizations should also implement proper access controls, network segmentation, and regular security assessments to identify similar vulnerabilities. The remediation process should include updating the FCRing application to a patched version that properly validates all user inputs and follows secure coding practices to prevent similar issues in the future. Additionally, implementing web application firewalls and intrusion detection systems can provide additional layers of protection against exploitation attempts.