CVE-2020-14196 Explained : Impact and Mitigation
Learn about CVE-2020-14196 affecting PowerDNS Recursor versions up to 4.3.1, 4.2.2, and 4.1.16. Find out the impact, affected systems, exploitation details, and mitigation steps.
In PowerDNS Recursor versions up to and including 4.3.1, 4.2.2, and 4.1.16, the ACL restricting access to the internal web server is not properly enforced.
Understanding CVE-2020-14196
In this CVE, a vulnerability in PowerDNS Recursor versions allows unauthorized access to the internal web server due to improper enforcement of access control lists (ACL).
What is CVE-2020-14196?
The vulnerability in PowerDNS Recursor versions up to 4.3.1, 4.2.2, and 4.1.16 allows attackers to bypass intended restrictions and gain unauthorized access to the internal web server.
The Impact of CVE-2020-14196
The vulnerability could lead to unauthorized access to sensitive information or unauthorized actions on the affected system, potentially compromising its security.
Technical Details of CVE-2020-14196
PowerDNS Recursor versions up to and including 4.3.1, 4.2.2, and 4.1.16 are affected by this vulnerability.
Vulnerability Description
The ACL that should restrict access to the internal web server is not properly enforced, allowing unauthorized users to access it.
Affected Systems and Versions
- PowerDNS Recursor versions up to 4.3.1
- PowerDNS Recursor versions up to 4.2.2
- PowerDNS Recursor versions up to 4.1.16
Exploitation Mechanism
Attackers can exploit this vulnerability by bypassing the intended access restrictions and gaining unauthorized access to the internal web server.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate the risks posed by CVE-2020-14196.
Immediate Steps to Take
- Update PowerDNS Recursor to a patched version that addresses the ACL enforcement issue.
- Monitor network traffic for any unauthorized access attempts.
- Implement additional access controls to limit exposure.
Long-Term Security Practices
- Regularly update and patch software to prevent known vulnerabilities.
- Conduct security assessments and audits to identify and address potential weaknesses.
Patching and Updates
Ensure that all systems running PowerDNS Recursor are updated to versions that have fixed the ACL enforcement vulnerability.