CVE-2002-2322 in Ultimate PHP Board UPB
Summary
by MITRE
Ultimate PHP Board (UPB) 1.0b stores the users.dat data file under the web root with insufficient access control, which allows remote attackers to obtain usernames and passwords.
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Analysis
by VulDB Data Team • 07/13/2024
The vulnerability identified as CVE-2002-2322 affects Ultimate PHP Board version 1.0b, a web-based bulletin board system that was prevalent in the early 2000s. This security flaw represents a critical misconfiguration issue where sensitive user authentication data is stored in a location accessible to unauthorized parties. The vulnerability stems from the application's improper file placement and access control mechanisms, creating an avenue for attackers to directly access user credential information without authentication.
The technical flaw manifests through the insecure storage of the users.dat file within the web root directory structure. This configuration violates fundamental security principles by placing sensitive authentication data in a publicly accessible location. The web root directory is designed to serve web content to users, but when sensitive files like user databases are placed there without proper access controls, they become immediately accessible to anyone who can navigate to the appropriate URL path. This represents a classic case of inadequate input validation and improper file system permissions, which aligns with CWE-276, which addresses improper file permissions and inadequate access control mechanisms.
The operational impact of this vulnerability is severe and multifaceted. Remote attackers can exploit this weakness to directly download the users.dat file, which contains usernames and passwords stored in plaintext or weakly hashed formats. This provides immediate access to all user accounts within the bulletin board system, enabling unauthorized individuals to impersonate legitimate users, access private communications, and potentially escalate their privileges within the compromised system. The vulnerability essentially eliminates the need for any authentication bypass techniques, as the credentials are readily available through simple web requests.
From an attacker's perspective, this vulnerability maps directly to several ATT&CK techniques including T1078 Valid Accounts for maintaining persistence and T1566 Phishing for initial access. The ability to obtain credentials without requiring additional exploitation steps significantly reduces the attack surface and increases the success rate of subsequent attacks. The vulnerability also demonstrates poor security by design principles where security controls are not properly integrated into the application architecture from the beginning.
Mitigation strategies for this vulnerability involve immediate remediation of the file placement issue by moving sensitive data files outside of the web root directory and implementing proper access controls. Organizations should establish strict file permission policies ensuring that sensitive data files are not accessible through web requests. The implementation of proper authentication mechanisms and access control lists should be enforced to prevent unauthorized access to user data. Additionally, regular security audits and penetration testing should be conducted to identify similar misconfigurations in web applications. The fix requires a fundamental architectural review of how sensitive data is stored and accessed within the application, emphasizing the importance of principle of least privilege and defense in depth approaches to security implementation. This vulnerability serves as a historical example of how simple misconfigurations can create severe security implications, highlighting the need for comprehensive security testing and proper security design practices in web application development.