CVE-2020-27220: Missing Authorization

January 14, 2021 (updated January 22, 2021)

The Eclipse Hono AMQP and MQTT protocol adapters do not check whether an authenticated gateway device is authorized to receive command & control messages when it has subscribed only to commands for a specific device. The missing check involves verifying that the command target device is configured giving permission for the gateway device to act on its behalf. This means an authenticated device of a certain tenant, notably also a non-gateway device acting like a gateway, may receive command & control messages targeted at a different device of the same tenant without corresponding permissions getting checked.

References

bugs.eclipse.org/bugs/show_bug.cgi?id=569856
nvd.nist.gov/vuln/detail/CVE-2020-27220

Code Behaviors & Features

Detect and mitigate CVE-2020-27220 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →