CVE-2009-0866 in pHNews
Summary
by MITRE
pHNews Alpha 1 stores sensitive information under the web root with insufficient access control, which allows remote attackers to download a database via a direct request for extra/genbackup.php.
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Analysis
by VulDB Data Team • 11/24/2024
The vulnerability identified as CVE-2009-0866 affects pHNews Alpha 1, a content management system that fails to implement proper access controls for sensitive data storage. This flaw resides in the application's configuration where database files are placed within the web root directory structure, creating an exploitable condition that directly exposes critical system information to unauthorized users. The specific vulnerability manifests through the extra/genbackup.php script which serves as an entry point for attackers to directly access and download database backups without proper authentication or authorization checks. This misconfiguration represents a fundamental failure in the principle of least privilege and proper secure coding practices, as sensitive data is stored in a location accessible to all web requests without adequate protection mechanisms.
The technical implementation of this vulnerability stems from improper file system permissions and inadequate input validation within the application's backup generation functionality. When the genbackup.php script is accessed directly, it fails to verify user credentials or session authenticity before serving database backup files. This design flaw allows any remote attacker to construct a direct URL request to the backup script and obtain sensitive information including user credentials, database schemas, and potentially confidential content. The vulnerability operates at the application layer and can be exploited through simple http requests, making it particularly dangerous as it requires no sophisticated attack vectors or specialized tools. The flaw aligns with CWE-275 permissions issues and represents a classic case of insecure direct object references where the application exposes internal objects without proper access controls.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially compromise the entire system integrity and availability. Attackers can obtain complete database backups containing user accounts, passwords, and system configurations which can then be used for further attacks including credential reuse, privilege escalation, and system compromise. The exposure of database schemas provides attackers with detailed information about the application's structure and potential attack surfaces. This vulnerability also violates several key principles from the mitre attack framework where the threat actor can leverage initial access through information gathering to establish persistence and move laterally within the network. The impact is particularly severe given that the vulnerability affects a content management system which often contains sensitive organizational data and user information.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements to prevent similar issues in the future. The primary immediate fix involves removing or securing the genbackup.php script by implementing proper authentication checks, moving database backup files outside the web root directory, and ensuring that sensitive data is never accessible through direct web requests. Organizations should implement proper file system permissions and access controls to prevent unauthorized access to backup files and sensitive directories. The solution aligns with defense-in-depth principles and requires implementing multiple layers of security controls including network segmentation, proper access control lists, and regular security audits. Additionally, developers should follow secure coding guidelines and conduct regular penetration testing to identify and remediate similar vulnerabilities. The vulnerability demonstrates the critical importance of proper input validation and access control implementation as outlined in various security standards and frameworks including those from owasp and nist.