CVE-2007-5841 in nuBoard
Summary
by MITRE
PHP remote file inclusion vulnerability in admin/index.php in nuBoard 0.5 allows remote attackers to execute arbitrary PHP code via a URL in the site parameter.
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Analysis
by VulDB Data Team • 10/10/2024
The CVE-2007-5841 vulnerability represents a critical remote file inclusion flaw in the nuBoard 0.5 content management system that exposes organizations to arbitrary code execution attacks. This vulnerability specifically targets the admin/index.php file where the application fails to properly validate or sanitize user-supplied input parameters. The flaw occurs when the application accepts a URL through the site parameter without adequate sanitization, allowing malicious actors to inject and execute arbitrary PHP code on the target server. The vulnerability stems from improper input validation practices that permit attackers to manipulate the application's behavior by supplying malicious URLs that get included as part of the application's execution flow.
This vulnerability operates under the Common Weakness Enumeration CWE-98 classification, which specifically addresses "Improper Control of Generation of Code ('Code Injection')" and falls within the broader category of CWE-20 "Improper Input Validation." The attack vector leverages the PHP include or require functions that accept dynamic parameters, creating an environment where attacker-controlled input can be executed as legitimate code. The vulnerability's impact is amplified by the fact that it occurs within the administrative interface, potentially allowing attackers to gain elevated privileges and full control over the affected system. The flaw essentially transforms the legitimate file inclusion mechanism into a code execution channel that can be exploited by remote attackers without requiring authentication.
From an operational perspective, this vulnerability creates significant risk for organizations using nuBoard 0.5 as it enables remote code execution capabilities that can lead to complete system compromise. Attackers can leverage this flaw to upload backdoors, steal sensitive data, modify content, or establish persistent access to the affected server. The vulnerability's remote nature means that attackers can exploit it from anywhere on the internet without requiring physical access or prior authentication credentials. The impact extends beyond immediate code execution to potential lateral movement within networks, as compromised systems can serve as launch points for further attacks. Additionally, the vulnerability can be exploited through automated scanning tools, making it particularly dangerous for organizations with exposed web applications.
Organizations should implement immediate mitigations including applying the vendor-provided patches or upgrading to newer versions of nuBoard that address this vulnerability. Input validation and sanitization measures should be strengthened to ensure that all user-supplied parameters are properly validated before being processed. The implementation of a web application firewall can provide additional protection by filtering malicious requests before they reach the vulnerable application. Organizations should also consider disabling unnecessary file inclusion features and implementing strict access controls for administrative interfaces. Security monitoring should be enhanced to detect suspicious file inclusion patterns and unusual access patterns that might indicate exploitation attempts. The vulnerability underscores the importance of following secure coding practices such as those outlined in the OWASP Top Ten and the principle of least privilege in application design to prevent similar issues from occurring in future deployments.