CVE-2008-4752 in TlNews
Summary
by MITRE
TlNews 2.2 allows remote attackers to bypass authentication and gain administrative access by setting the tlNews_login cookie to admin.
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Analysis
by VulDB Data Team • 11/09/2024
The vulnerability described in CVE-2008-4752 represents a critical authentication bypass flaw in the TlNews 2.2 content management system that directly enables unauthorized administrative access. This issue stems from a fundamental flaw in the application's session management and access control mechanisms, where the system fails to properly validate user credentials before granting administrative privileges. The vulnerability specifically manifests when an attacker manipulates the tlNews_login cookie value to admin, effectively circumventing the normal authentication process and immediately elevating their privileges to administrator level.
This authentication bypass vulnerability falls under the category of weak session management and improper access control as defined by CWE-287, which addresses authentication flaws that allow attackers to assume the identity of other users. The flaw demonstrates a classic case of insufficient input validation and trust validation, where the application blindly accepts the cookie value without verifying the legitimacy of the administrative claim. From an operational perspective, this vulnerability represents a severe security risk as it eliminates the need for legitimate credentials, passwords, or any form of proper authentication mechanism, making it exceptionally dangerous for web applications that rely on user authentication for access control.
The technical impact of this vulnerability extends beyond simple privilege escalation, as it fundamentally undermines the security model of the application by allowing attackers to bypass all authentication checks. Attackers can exploit this flaw without requiring knowledge of valid user credentials, making it particularly dangerous for environments where the application is publicly accessible. The vulnerability's exploitation requires minimal technical skill and can be accomplished through simple cookie manipulation, making it a prime target for automated attacks and script kiddies. This type of vulnerability also aligns with ATT&CK technique T1548.002, which covers abuse of authentication mechanisms, and represents a common pattern in legacy web applications where security was not properly implemented in the authentication flow.
Organizations using TlNews 2.2 should immediately implement mitigations including patching the application to properly validate authentication tokens, implementing proper session management controls, and ensuring that administrative access requires legitimate credentials rather than cookie manipulation. The fix should involve implementing robust input validation for authentication cookies and ensuring that privilege levels are verified against legitimate user accounts rather than accepting arbitrary cookie values. Additionally, network-level protections such as web application firewalls and monitoring for suspicious cookie manipulation patterns should be deployed to detect and prevent exploitation attempts. Regular security assessments and code reviews should be conducted to identify similar authentication bypass vulnerabilities in other applications and systems within the organization's infrastructure.