CVE-2021-44533 : Security Advisory and Response

Node.js versions prior to 12.22.9, 14.18.3, 16.13.2, and 17.3.1 mishandled multi-value Relative Distinguished Names, leading to security vulnerabilities.

Understanding CVE-2021-44533

What is CVE-2021-44533?

Node.js versions below specified releases incorrectly processed multi-value Relative Distinguished Names, potentially enabling attackers to manipulate certificate subjects to bypass verification mechanisms.

The Impact of CVE-2021-44533

Node.js instances not supporting multi-value Relative Distinguished Names do not face direct risks. However, third-party applications reliant on Node.js may remain susceptible.

Technical Details of CVE-2021-44533

Vulnerability Description

Node.js versions before 12.22.9, 14.18.3, 16.13.2, and 17.3.1 incorrectly handled multi-value Relative Distinguished Names.

Affected Systems and Versions

Versions impacted: < 12.22.9, < 14.18.3, < 16.13.2, < 17.3.1

Exploitation Mechanism

Attackers could create certificate subjects with single-value Relative Distinguished Names misinterpreted as multi-value, potentially allowing unauthorized access.

Mitigation and Prevention

Immediate Steps to Take

Update Node.js to version 12.22.9, 14.18.3, 16.13.2, or 17.3.1 to mitigate the vulnerability.
Review and adjust certificate subject validation mechanisms in third-party applications.

Long-Term Security Practices

Regularly monitor Node.js security updates and apply patches promptly.

Patching and Updates

Stay informed about security advisories and follow best practices for secure coding and configurations.