CVE-2020-27220 : What You Need to Know

Eclipse Hono is affected by a vulnerability that allows unauthorized reception of command & control messages. Learn about the impact, technical details, and mitigation steps.

Understanding CVE-2020-27220

The vulnerability in Eclipse Hono's AMQP and MQTT protocol adapters can lead to unauthorized access to command & control messages.

What is CVE-2020-27220?

The issue arises from a lack of authorization checks for gateway devices receiving specific commands without proper permissions.

The Impact of CVE-2020-27220

Unauthorized devices within the same tenant can receive command & control messages meant for other devices without proper authorization.

Technical Details of CVE-2020-27220

Eclipse Hono's vulnerability stems from inadequate authorization checks in its protocol adapters.

Vulnerability Description

The flaw allows authenticated gateway devices to receive messages intended for other devices within the same tenant without proper authorization.

Affected Systems and Versions

Product: Eclipse Hono
Vendor: The Eclipse Foundation
Versions: 1.4.0 to 1.4.4 inclusive, 1.5.0

Exploitation Mechanism

Unauthorized devices can exploit this vulnerability to intercept command & control messages intended for other devices within the same tenant.

Mitigation and Prevention

Immediate action and long-term security practices are crucial to address CVE-2020-27220.

Immediate Steps to Take

Update Eclipse Hono to a patched version that includes proper authorization checks.
Review and adjust device permissions to prevent unauthorized access.

Long-Term Security Practices

Regularly monitor and audit device communications and permissions.
Implement network segmentation to limit the impact of unauthorized access.

Patching and Updates

Apply security patches provided by Eclipse Foundation to address the vulnerability effectively.