CVE-2020-15896 Explained : Impact and Mitigation
Learn about CVE-2020-15896, an authentication-bypass issue on D-Link DAP-1522 devices allowing unauthorized access to protected pages. Find mitigation steps and firmware updates.
An authentication-bypass issue was discovered on D-Link DAP-1522 devices, allowing unauthorized access to certain pages without authentication.
Understanding CVE-2020-15896
What is CVE-2020-15896?
This CVE describes an authentication-bypass vulnerability on D-Link DAP-1522 devices, enabling unauthorized users to access specific pages without proper authentication.
The Impact of CVE-2020-15896
The vulnerability allows attackers to bypass authentication mechanisms and access restricted pages directly, compromising the security of the application.
Technical Details of CVE-2020-15896
Vulnerability Description
The issue arises from the improper handling of the NO_NEED_AUTH parameter, which, when set to 1, grants unauthorized users direct access to protected pages.
Affected Systems and Versions
- D-Link DAP-1522 devices version 1.4x before 1.10b04Beta02
Exploitation Mechanism
By appending a query string 'NO_NEED_AUTH=1' to protected URLs, unauthorized users can access the application directly without authentication.
Mitigation and Prevention
Immediate Steps to Take
- Disable direct access to critical pages without proper authentication
- Implement strong access control mechanisms
- Regularly monitor and audit access logs for suspicious activities
Long-Term Security Practices
- Conduct regular security assessments and penetration testing
- Keep systems and firmware up to date
Patching and Updates
Apply the latest firmware updates provided by D-Link to address the authentication-bypass vulnerability.