CVE-2019-19135
Insufficient Nonce Validation in Eclipse Milo Client
Description
### 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:[email protected])
How to fix CVE-2019-19135
To remediate CVE-2019-19135, upgrade the affected package to a fixed version below.
- —upgrade to 0.3.6 or later
Is CVE-2019-19135 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 0.3.6
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |