CVE-2008-6667 in A+ PHP Scripts News Management System
Summary
by MITRE
A+ PHP Scripts News Management System (NMS) allows remote attackers to bypass authentication and gain administrator privileges by setting the mobsuser and mobspass cookies to 1.
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Analysis
by VulDB Data Team • 10/30/2024
The CVE-2008-6667 vulnerability represents a critical authentication bypass flaw in the A+ PHP Scripts News Management System, a widely deployed content management solution that was prevalent in the late 2000s era of web application development. This vulnerability stems from a fundamental design flaw in the cookie-based authentication mechanism where the system fails to properly validate user credentials before granting administrative access. The flaw specifically manifests when attackers manipulate two critical cookies named mobsuser and mobspass, setting both to the value of 1, which effectively grants unauthorized access to administrative functions without proper authentication. This type of vulnerability falls under the CWE-287 category of Improper Authentication, which is classified as a high-severity issue in the Common Weakness Enumeration framework. The vulnerability directly maps to ATT&CK technique T1078.004 which covers Valid Accounts - Default Accounts, as it exploits a hardcoded authentication bypass mechanism rather than exploiting legitimate credentials.
The technical implementation of this vulnerability exploits the insecure cookie handling within the PHP application's authentication logic. When the application processes user requests, it checks for the presence of mobsuser and mobspass cookies and grants administrative privileges if both are set to the value 1. This design flaw bypasses all normal authentication procedures, including password validation, user account verification, and session management protocols. The vulnerability demonstrates poor input validation and authentication flow control, where the application assumes that the presence of these specific cookie values indicates legitimate administrative access without performing any cryptographic verification or user credential validation. The flaw essentially creates a backdoor mechanism within the application's authentication system that is accessible through simple cookie manipulation, making it particularly dangerous as it requires minimal technical expertise to exploit.
The operational impact of CVE-2008-6667 is severe and far-reaching for organizations using the affected News Management System, as it provides attackers with complete administrative control over the affected web applications. Once exploited, attackers can modify or delete news articles, alter user permissions, access sensitive data, and potentially use the compromised system as a launch point for further attacks within the network infrastructure. The vulnerability's remote nature means that attackers can exploit it from anywhere on the internet without requiring physical access to the target system, making it particularly attractive to malicious actors. Additionally, the ease of exploitation through simple cookie manipulation means that this vulnerability could be automatically detected and exploited by automated scanning tools, leading to widespread compromise of vulnerable systems. Organizations that relied on this system for content management would face significant data integrity issues, potential regulatory compliance violations, and reputational damage from unauthorized access to their published content and administrative functions.
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 modifying the application's authentication logic to properly validate user credentials before granting administrative access, ensuring that cookie values are verified against legitimate user accounts and passwords. Organizations should implement proper input validation and sanitization techniques to prevent cookie manipulation attacks, including cryptographic session management and proper authentication flow control. The vulnerability highlights the importance of following secure coding practices as outlined in OWASP Top 10 and the Secure Coding Guidelines, specifically addressing issues related to authentication and session management. Organizations should also implement network segmentation and monitoring to detect suspicious cookie manipulation attempts, along with regular security assessments to identify similar authentication bypass vulnerabilities. The fix should include comprehensive logging of authentication attempts and implementation of account lockout mechanisms to prevent brute force exploitation attempts. Additionally, the application should be updated to use modern authentication frameworks that properly handle session management and prevent the use of hardcoded values for privilege escalation, aligning with NIST SP 800-53 security controls for authentication and access control.