CVE-2006-5022 in pNews
Summary
by MITRE
PHP remote file inclusion vulnerability in includes/global.php in Joshua Wilson pNews System 1.1.0 (aka PowerNews) allows remote attackers to execute arbitrary PHP code via a URL in the nbs parameter.
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Analysis
by VulDB Data Team • 04/09/2025
The vulnerability identified as CVE-2006-5022 represents a critical remote file inclusion flaw within the Joshua Wilson pNews System version 1.1.0, commonly known as PowerNews. This vulnerability resides in the includes/global.php file and demonstrates a classic security weakness that has been documented in numerous systems throughout the history of web application development. The flaw enables malicious actors to inject and execute arbitrary PHP code on the target server by manipulating the nbs parameter through a URL. This type of vulnerability is particularly dangerous as it can lead to complete system compromise and unauthorized access to sensitive data.
The technical implementation of this vulnerability stems from improper input validation and sanitization within the pNews system's parameter handling mechanism. When the application processes the nbs parameter, it fails to properly validate or sanitize the input before incorporating it into the file inclusion process. This allows an attacker to supply a malicious URL that points to external PHP code, which gets executed on the server hosting the vulnerable application. The vulnerability directly maps to CWE-98, which describes the condition where a web application includes a file without properly validating the file path, and it aligns with ATT&CK technique T1190, which covers exploiting vulnerabilities in web applications to gain remote code execution capabilities.
The operational impact of this vulnerability is severe and multifaceted. An attacker who successfully exploits this vulnerability can execute arbitrary commands on the target server, potentially gaining full administrative control over the web application and underlying system. This could result in data theft, system compromise, service disruption, and unauthorized access to sensitive information stored within the application. The vulnerability affects any system running the specific version of the pNews system, making it particularly concerning for organizations that have not updated their software to patched versions. The remote nature of the attack means that exploitation can occur from anywhere on the internet without requiring physical access to the target system.
Mitigation strategies for this vulnerability should include immediate application of the vendor-provided security patch or upgrade to a newer version of the pNews system that addresses this flaw. Organizations should implement proper input validation and sanitization measures to prevent unauthorized file inclusion attempts. The principle of least privilege should be enforced by ensuring that web applications run with minimal required permissions and that file inclusion operations are restricted to predefined, trusted paths only. Additionally, implementing web application firewalls and intrusion detection systems can help identify and block attempts to exploit this vulnerability. Security monitoring should be enhanced to detect unusual file inclusion patterns and suspicious parameter values that may indicate exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify similar issues in other applications and ensure that all software components are kept up to date with the latest security patches.