CVE-2009-2382 in phpMyBlockchecker
Summary
by MITRE
admin.php in phpMyBlockchecker 1.0.0055 allows remote attackers to bypass authentication and gain administrative access by setting the PHPMYBCAdmin cookie to LOGGEDIN.
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Analysis
by VulDB Data Team • 12/02/2024
The vulnerability identified as CVE-2009-2382 affects phpMyBlockchecker version 1.0.0055 and represents a critical authentication bypass flaw that enables remote attackers to escalate privileges without proper credentials. This issue stems from improper session management and authentication verification mechanisms within the administrative interface. The vulnerability specifically targets the admin.php script which handles administrative functions and user authentication for the phpMyBlockchecker application. The flaw manifests when an attacker can manipulate the PHPMYBCAdmin cookie value to LOGGEDIN, effectively granting themselves full administrative privileges without undergoing legitimate authentication processes.
The technical implementation of this vulnerability exploits weak input validation and session handling within the application's authentication flow. When phpMyBlockchecker processes administrative requests, it relies on cookie-based authentication to verify user privileges. The application fails to properly validate the authenticity of the PHPMYBCAdmin cookie value, allowing attackers to forge administrative sessions simply by setting the cookie to the predetermined value LOGGEDIN. This represents a classic case of insecure authentication mechanisms where the application trusts client-side data without proper server-side verification. The vulnerability aligns with CWE-287 which addresses improper authentication issues, specifically focusing on the lack of proper session validation and the reliance on easily manipulable client-side state information.
The operational impact of this vulnerability is severe as it provides attackers with complete administrative control over the affected phpMyBlockchecker installation. Once authenticated, an attacker can perform any administrative function including but not limited to modifying configuration settings, adding or removing users, accessing sensitive data, and potentially using the compromised system as a pivot point for further attacks within the network. The remote nature of this vulnerability means that attackers do not require physical access or local network presence to exploit the flaw, making it particularly dangerous in internet-facing environments. This authentication bypass creates a persistent backdoor that can be used for extended periods without detection, especially if the application is not regularly monitored for suspicious authentication patterns or if administrators are unaware of the vulnerability.
Mitigation strategies for this vulnerability should focus on implementing proper authentication controls and input validation measures. The primary fix involves modifying the admin.php script to validate the PHPMYBCAdmin cookie value against legitimate session data rather than accepting arbitrary values. Security implementations should include cryptographic verification of session tokens, proper session management with secure random session identifiers, and server-side validation of all authentication states. Organizations should also implement monitoring for unusual authentication patterns and consider implementing additional security layers such as multi-factor authentication, IP address restrictions, and regular security audits. The vulnerability demonstrates the importance of following secure coding practices as outlined in the OWASP Top Ten and aligns with ATT&CK technique T1078 which covers valid accounts and legitimate credentials for maintaining persistent access. System administrators should immediately patch or upgrade to versions that address this authentication bypass vulnerability and conduct comprehensive security assessments of all web applications to identify similar insecure authentication mechanisms.