CVE-2005-0811 in notifylink
Summary
by MITRE
the web interface in notifylink 3.0 does not properly restrict access to functions that have been disabled in the gui which allows remote authenticated users to bypass intended restrictions via a direct request to certain urls.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 07/18/2024
The vulnerability described in CVE-2005-0811 represents a critical access control flaw within the web interface of NotifyLink 3.0, a network monitoring and alerting system. This issue stems from improper implementation of access restrictions in the graphical user interface, where certain administrative functions are disabled but can still be accessed through direct URL requests. The flaw demonstrates a classic broken access control vulnerability that violates fundamental security principles of least privilege and defense in depth. The vulnerability affects the web-based management interface of the NotifyLink system, which is designed to provide network administrators with monitoring capabilities and alerting mechanisms for various network events and system statuses.
The technical implementation of this vulnerability occurs at the application layer where the web interface fails to properly validate user permissions before executing sensitive operations. When administrators disable certain functions through the GUI, the underlying code should prevent access to those functions regardless of how the request is made. However, in NotifyLink 3.0, the system does not enforce access controls consistently across all access methods, allowing authenticated users to bypass the intended restrictions by directly accessing the URL endpoints associated with disabled functions. This creates a scenario where the GUI serves as a mere visual representation of access controls rather than an actual enforcement mechanism. The flaw aligns with CWE-285, which describes improper authorization issues, and specifically relates to the absence of proper access control validation in web applications.
The operational impact of this vulnerability is significant for organizations relying on NotifyLink 3.0 for network monitoring and security operations. An authenticated attacker who can access the web interface can potentially perform administrative functions that were intentionally disabled by system administrators, leading to unauthorized configuration changes, data manipulation, or privilege escalation within the monitored network environment. This vulnerability undermines the security posture of the entire system by allowing users to bypass controls that were put in place to prevent unauthorized access to sensitive network management functions. The implications extend beyond simple access bypass, as these disabled functions may include critical administrative capabilities such as system configuration changes, user management, or alert configuration modifications that could compromise network security. The vulnerability also represents a violation of the principle of least privilege, where users retain more access than they should have based on their assigned roles.
Mitigation strategies for CVE-2005-0811 should focus on implementing proper access control validation at the application level, ensuring that all requests are validated against user permissions regardless of how they are initiated. Organizations should immediately apply available patches or updates from the vendor to address the access control implementation flaw. System administrators should conduct comprehensive reviews of all web application interfaces to identify similar access control gaps, particularly focusing on functions that are disabled through GUI controls but may still be accessible via direct API calls or URL requests. The implementation should include robust input validation, consistent authentication checks, and proper session management to prevent unauthorized access. Additionally, organizations should consider implementing web application firewalls and access control monitoring to detect and prevent unauthorized access attempts. This vulnerability highlights the importance of adhering to security standards such as those outlined in the OWASP Top Ten and ATT&CK framework, specifically addressing techniques related to privilege escalation and unauthorized access to administrative functions. Regular security assessments and penetration testing should be conducted to identify similar access control weaknesses in other applications and systems within the organization's infrastructure.