CVE-2020-27488 : Security Advisory and Response

Loxone Miniserver devices with firmware before 11.1 are vulnerable to an authentication bypass issue that allows unauthenticated access to cloud services.

Understanding CVE-2020-27488

Loxone Miniserver devices with outdated firmware versions are at risk of unauthorized access to cloud services due to a flaw in the authentication mechanism.

What is CVE-2020-27488?

This CVE describes a vulnerability in Loxone Miniserver devices that lack proper authentication controls, enabling unauthenticated access to cloud services.

The Impact of CVE-2020-27488

The vulnerability allows attackers to exploit unauthenticated cloud services indefinitely until the device's firmware is updated, posing a significant security risk.

Technical Details of CVE-2020-27488

Loxone Miniserver devices with firmware versions prior to 11.1 are affected by this vulnerability.

Vulnerability Description

Devices with outdated firmware cannot utilize an authentication method based on the update package signature, leading to unauthenticated cloud service access.

Affected Systems and Versions

Product: Loxone Miniserver
Firmware Versions: Before 11.1 (including 11.1.9.3)

Exploitation Mechanism

Attackers or spoofed devices can exploit the lack of authentication to access cloud services without proper verification.

Mitigation and Prevention

Steps to address and prevent the CVE-2020-27488 vulnerability.

Immediate Steps to Take

Update Loxone Miniserver firmware to version 11.1 or higher to enable proper authentication.
Monitor and restrict access to cloud services to prevent unauthorized usage.

Long-Term Security Practices

Regularly update firmware and security patches to mitigate future vulnerabilities.
Implement multi-factor authentication and strong password policies for enhanced security.

Patching and Updates

Stay informed about security advisories from Loxone and apply patches promptly to secure devices.