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:
SecurityPolicyisNone- 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
For more information
If you have any questions or comments about this advisory:
- Open an issue at https://github.com/eclipse/milo/issues
- Email the mailing list
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.eclipse.milo:sdk-client | < 0.3.6 | 0.3.6 |
References
- https://github.com/eclipse/milo/security/advisories/GHSA-pq4w-qm9g-qx68
- https://nvd.nist.gov/vuln/detail/CVE-2019-19135
- https://github.com/eclipse/milo/commit/cac0e710bf2b8bed9c602fc597e9de1d8903abed
- https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2019-19135.pdf
- https://opcfoundation.org/security-bulletins
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N- Weakness (CWE)
CWE-330, CWE-522- Platform
- Java / Kotlin (Maven)
- Package
org.eclipse.milo:sdk-client- Disclosed
- 16.03.2020
- Updated
- 11.10.2026 11:21
Sources and licenses
OSV / GitHub Advisory Database - GHSA-pq4w-qm9g-qx68 - CC BY 4.0
Vulnerability history: org.eclipse.milo:sdk-client
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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