CVE-2006-0153 in Fourtwosevenbb
Summary
by MITRE
427BB 2.2 and 2.2.1 verifies authentication credentials based on the username, authenticated, and usertype cookies, which allows remote attackers to bypass authentication by using a valid username and usertype and setting the authenticated cookie.
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Analysis
by VulDB Data Team • 06/15/2025
The vulnerability identified as CVE-2006-0153 affects versions 2.2 and 2.2.1 of the 427BB application, presenting a critical authentication bypass flaw that undermines the security posture of the affected system. This vulnerability stems from a flawed authentication verification mechanism that relies on cookie-based validation rather than proper session management protocols. The flaw specifically manifests when the application checks authentication credentials using three distinct cookies: username, authenticated, and usertype. The design error occurs because the system does not properly validate the authenticated cookie's integrity or origin, allowing malicious actors to exploit this weakness through simple cookie manipulation techniques.
The technical implementation of this vulnerability aligns with CWE-287, which addresses improper authentication issues in software systems. Attackers can exploit this flaw by constructing a malicious cookie payload that includes a valid username and usertype while simultaneously setting the authenticated cookie to a value that bypasses proper authentication checks. This type of vulnerability represents a classic example of weak session management and insufficient input validation, where the application trusts client-side data without proper server-side verification. The flaw essentially creates a backdoor authentication mechanism that allows unauthorized access to protected resources without proper credential verification.
From an operational impact perspective, this vulnerability enables remote attackers to gain unauthorized access to the 427BB application's protected areas, potentially leading to complete system compromise. The attack vector is particularly dangerous because it requires minimal sophistication from the attacker, merely needing to manipulate existing cookie values rather than exploiting complex system vulnerabilities. This authentication bypass could result in data theft, unauthorized system modifications, privilege escalation, and potential lateral movement within networks where the application is deployed. The vulnerability's remote nature means that attackers do not require physical access or network proximity to exploit the flaw.
The mitigation strategies for this vulnerability should focus on implementing proper session management protocols and strengthening authentication mechanisms. Organizations should ensure that authentication cookies contain sufficient entropy and are protected against tampering through cryptographic signatures or similar security measures. The application should validate all authentication cookie values server-side, ensuring that the authenticated cookie cannot be manipulated to bypass security checks. Additionally, implementing proper session timeout mechanisms, using secure cookie attributes such as HttpOnly and Secure flags, and employing multi-factor authentication can significantly reduce the risk of exploitation. From an ATT&CK framework perspective, this vulnerability maps to technique T1078 for valid accounts and T1566 for credential access, highlighting the importance of robust authentication controls in preventing unauthorized system access.