CVE-2008-6939 in Web Hosting Directory
Summary
by MITRE
TurnkeyForms Web Hosting Directory allows remote attackers to bypass authentication and (1) gain administrative privileges by setting the adm cookie to 1 or (2) gain privileges as another user by setting the logged cookie to the target username.
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Analysis
by VulDB Data Team • 11/11/2024
CVE-2008-6939 represents a critical authentication bypass vulnerability found in TurnkeyForms Web Hosting Directory software that fundamentally compromises the security posture of affected systems. This vulnerability stems from improper validation of user authentication cookies, specifically the adm and logged cookies, which are manipulated to escalate privileges without legitimate authorization. The flaw exists in the application's session management mechanism where cookie values are not properly verified or sanitized before being processed, creating a direct pathway for unauthorized access to administrative functions and user accounts.
The technical implementation of this vulnerability resides in the application's cookie-based authentication system where the adm cookie value of 1 directly grants administrative privileges without proper verification of the user's legitimate access rights. Similarly, the logged cookie manipulation allows attackers to impersonate other users by simply setting this cookie to the target username, effectively bypassing all authentication checks. This type of vulnerability falls under CWE-287 which specifically addresses improper authentication mechanisms, and represents a classic case of insecure session management that violates fundamental security principles. The vulnerability's impact is amplified by the fact that it requires no complex exploitation techniques, making it highly accessible to attackers with basic knowledge of web application security.
From an operational standpoint, this vulnerability creates severe consequences for organizations using TurnkeyForms Web Hosting Directory as it allows complete compromise of administrative functions and user account access. Attackers can not only gain full administrative control over the hosting directory but also impersonate any user within the system, potentially leading to data theft, unauthorized modifications, and complete system takeover. The vulnerability's remote nature means that attackers do not require physical access or network proximity to exploit it, making it particularly dangerous in cloud and web-hosted environments where such systems are commonly deployed. This flaw directly relates to ATT&CK technique T1078 which covers valid accounts and privilege escalation through legitimate credentials.
The mitigation strategies for CVE-2008-6939 should focus on implementing proper input validation and authentication mechanisms for all cookie values within the application. Organizations must ensure that cookie values are properly validated against legitimate user sessions and that administrative privileges are granted only after robust authentication checks. The fix involves implementing server-side validation of cookie contents, proper session management with secure session identifiers, and ensuring that privilege escalation requires legitimate authentication tokens rather than simple cookie manipulation. Additionally, implementing proper access control lists and role-based permissions would prevent unauthorized privilege elevation regardless of cookie manipulation attempts. Regular security audits and code reviews should be conducted to identify similar authentication bypass vulnerabilities in other applications, as this type of flaw is commonly found in legacy web applications that lack modern security controls. The vulnerability serves as a reminder of the critical importance of proper authentication mechanisms and the potential catastrophic consequences when such controls are inadequate.