Code injection via unsafe YAML loading

Impact

Sockeye uses YAML to store model and data configurations on disk. Versions below 2.3.24 use unsafe YAML loading, which can be made to execute arbitrary code embedded in config files.

An attacker can add malicious code to the config file of a trained model and attempt to convince users to download and run it. If users run the model, the embedded code will run locally.

Patches

The issue is fixed in version 2.3.24 and above by #964.

For more information

If you have any questions or comments about this advisory:

• Open an issue in awslabs/sockeye
• Email us at sockeye-dev

Attribution

This vulnerability was reported by Masatoshi Yoshizawa of yamory Security Team.