CVE-2020-9438 : Security Advisory and Response

Tinxy Door Lock with firmware before 3.2 allows attackers to unlock a door by replaying an Unlock request that occurred when the attacker was previously authorized. Door-access revocation is mishandled.

Understanding CVE-2020-9438

This CVE entry describes a vulnerability in the Tinxy Door Lock system.

What is CVE-2020-9438?

The vulnerability in the Tinxy Door Lock system allows unauthorized individuals to unlock a door by replaying a previously authorized Unlock request.

The Impact of CVE-2020-9438

The vulnerability poses a significant security risk as it enables unauthorized access to secured areas by exploiting a flaw in the door-access revocation process.

Technical Details of CVE-2020-9438

The following details provide a deeper understanding of the technical aspects of this vulnerability.

Vulnerability Description

Tinxy Door Lock with firmware before version 3.2 is susceptible to unauthorized door unlocking through replay attacks on previously authorized Unlock requests.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

Attackers exploit the vulnerability by replaying Unlock requests that were previously authorized, bypassing the door-access revocation mechanism.

Mitigation and Prevention

Protecting systems from CVE-2020-9438 requires immediate action and long-term security practices.

Immediate Steps to Take

Upgrade the Tinxy Door Lock firmware to version 3.2 or above to mitigate the vulnerability.
Monitor access logs for suspicious activity related to door unlocking.

Long-Term Security Practices

Regularly update firmware and security patches to prevent future vulnerabilities.
Implement multi-factor authentication for enhanced access control.

Patching and Updates

Stay informed about security updates and patches released by the vendor to address known vulnerabilities.