GHSA-pq4w-qm9g-qx68

Insufficient Nonce Validation in Eclipse Milo Client

### Impact Credential replay affecting those connected to a server when *all 3* of the following conditions are met: - `SecurityPolicy` is `None` - using username/password or X509-based authentication - the server has a defect causing it to send null/empty or zeroed nonces ### Patches The problem has been patched in version `0.3.6`. A more relaxed treatment of validation as agreed upon by the OPC UA Security Working Group is implemented in version `0.3.7`. ### Workarounds Do not use username/password or X509-based authentication with `SecurityPolicy` of `None`. ### References https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2019-19135.pdf ### For more information If you have any questions or comments about this advisory: * Open an issue at [https://github.com/eclipse/milo/issues](https://github.com/eclipse/milo/issues) * Email [the mailing list](mailto:milo-dev@eclipse.org)