CVE-2020-36478 : Security Advisory and Response

CVE-2020-36478 is a vulnerability discovered in Mbed TLS before version 2.25.0, affecting versions prior to 2.16.9 LTS and 2.7.18 LTS. The issue allows a NULL algorithm parameters entry to be considered valid, potentially leading to the acceptance of invalid certificates.

Understanding CVE-2020-36478

This section provides insights into the nature and impact of the CVE-2020-36478 vulnerability.

What is CVE-2020-36478?

CVE-2020-36478 is a security flaw in Mbed TLS that arises from a NULL algorithm parameters entry being incorrectly validated, potentially allowing the acceptance of invalid certificates.

The Impact of CVE-2020-36478

The vulnerability could result in the acceptance of certificates that should be considered invalid, leading to potential security risks and unauthorized access.

Technical Details of CVE-2020-36478

Explore the technical aspects of the CVE-2020-36478 vulnerability.

Vulnerability Description

The issue in Mbed TLS before version 2.25.0 allows a NULL algorithm parameters entry to be mistaken for a valid certificate, potentially compromising security.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions Affected: Versions before 2.25.0, including versions prior to 2.16.9 LTS and 2.7.18 LTS

Exploitation Mechanism

The vulnerability can be exploited by crafting certificates with mismatched parameters, leading to their acceptance as valid.

Mitigation and Prevention

Learn how to address and prevent the CVE-2020-36478 vulnerability.

Immediate Steps to Take

Update Mbed TLS to version 2.25.0 or later to mitigate the vulnerability.
Regularly monitor for security advisories and updates from Mbed TLS.

Long-Term Security Practices

Implement regular security audits and assessments to identify vulnerabilities.
Educate users on verifying certificate authenticity and ensuring secure connections.

Patching and Updates

Apply patches and updates promptly to ensure the security of Mbed TLS.