CVE-2021-45490 : What You Need to Know

3CX client applications on Windows, iOS, and Android lack SSL certificate validation.

Understanding CVE-2021-45490

What is CVE-2021-45490?

The client applications in 3CX on Windows, iOS, and Android lack SSL certificate validation.

The Impact of CVE-2021-45490

This vulnerability could allow attackers to conduct man-in-the-middle attacks, compromising sensitive data transmitted by the client applications.

Technical Details of CVE-2021-45490

Vulnerability Description

The client applications in 3CX on Windows, iOS, and Android through 2022-03-17 do not validate SSL certificates, exposing users to potential security risks.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers could intercept and manipulate sensitive data transmitted between the client applications and servers due to the lack of SSL certificate validation.

Mitigation and Prevention

Immediate Steps to Take

Users should avoid connecting to unsecured networks using the affected 3CX client applications.
Implement VPN connections for secure data transmission.

Long-Term Security Practices

Regularly update the 3CX client applications to the latest versions with SSL validation.
Educate users on the risks of connecting to unsecured networks.

Patching and Updates

Patch the 3CX client applications to versions that include proper SSL certificate validation to mitigate this vulnerability.