CVE-2019-19135

SIDIS Prime before V4.0.400 is affected by multiple vulnerabilities in the components OPC UA and OpenSSL, that could allow an unauthenticated attacker with access to the network where SIDIS Prime is installed to reuse OPC UA client credentials, create a denial of service condition of the SIDIS Prime OPC UA client, or create a denial of service condition of the SIDIS Prime TLS service. Siemens has released a new version of SIDIS Prime and recommends to update to the latest version.

### 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)

SIDIS Prime before V4.0.400 is affected by multiple vulnerabilities in the components OPC UA and OpenSSL, that could allow an unauthenticated attacker with access to the network where SIDIS Prime is installed to reuse OPC UA client credentials, create a denial of service condition of the SIDIS Prime OPC UA client, or create a denial of service condition of the SIDIS Prime TLS service. Siemens has released a new version of SIDIS Prime and recommends to update to the latest version.