{"id":"CVE-2019-19135","aliases":["EUVD-2020-0355","GHSA-pq4w-qm9g-qx68"],"status":"published","title":"Insufficient Nonce Validation in Eclipse Milo Client","description":"In OPC Foundation OPC UA .NET Standard codebase 1.4.357.28, servers do not create sufficiently random numbers in OPCFoundation.NetStandard.Opc.Ua before 1.4.359.31, which allows man in the middle attackers to reuse encrypted user credentials sent over the network.","severity":{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01043,"percentile":0.64339,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-330","CWE-522"],"published":"2020-03-16T15:47:24Z","modified":"2026-10-24T10:30:34Z","fixes":[{"ecosystem":"Maven","package":"org.eclipse.milo:sdk-client","fixed_in":["0.3.6"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"org.eclipse.milo:sdk-client","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.3.4"},{"fixed":"0.3.6"}]}]},{"source":"osv","ecosystem":"Maven","package":"org.eclipse.milo:sdk-client","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.3.6"}]}],"versions":["0.1.0","0.1.1","0.1.2","0.1.3","0.1.4","0.1.5","0.1.6","0.2.0","0.2.1","0.2.2","0.2.3","0.2.4","0.2.5","0.3.0","0.3.0-M1","0.3.1","0.3.1-M1","0.3.2","0.3.2-M1","0.3.3","0.3.3-RC1","0.3.3-RC2","0.3.3-RC3","0.3.4","0.3.5"]}],"products":[{"vendor":"opcfoundation","product":"netstandard.opc.ua"},{"vendor":"opcfoundation","product":"ua-.netstandard"}],"references":[{"url":"https://opcfoundation.org/security-bulletins/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory"]},{"url":"https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2019-19135.pdf","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","fix","web"]},{"url":"https://github.com/eclipse/milo/security/advisories/GHSA-pq4w-qm9g-qx68","tags":["web"]},{"url":"https://github.com/eclipse/milo/commit/cac0e710bf2b8bed9c602fc597e9de1d8903abed","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-19135","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-pq4w-qm9g-qx68"},{"url":"https://opcfoundation.org/security-bulletins","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2019-19135","description":"In OPC Foundation OPC UA .NET Standard codebase 1.4.357.28, servers do not create sufficiently random numbers in OPCFoundation.NetStandard.Opc.Ua before 1.4.359.31, which allows man in the middle attackers to reuse encrypted user credentials sent over the network.","status":"published","published":"2020-03-16T15:47:24Z","modified":"2024-08-05T02:09:39.451Z","updated_at":"2026-11-02T14:20:20.74896Z"}],"euvd":[{"id":"EUVD-2020-0355","description":"In OPC Foundation OPC UA .NET Standard codebase 1.4.357.28, servers do not create sufficiently random numbers in OPCFoundation.NetStandard.Opc.Ua before 1.4.359.31, which allows man in the middle attackers to reuse encrypted user credentials sent over the network.","status":"published","published":"2020-03-16T15:47:24Z","modified":"2024-08-05T02:09:39Z","updated_at":"2026-11-03T02:40:25.841101Z"}],"ghsa":[{"id":"GHSA-pq4w-qm9g-qx68","title":"Insufficient Nonce Validation in Eclipse Milo Client","description":"### Impact\nCredential replay affecting those connected to a server when *all 3* of the following conditions are met:\n- `SecurityPolicy` is `None`\n- using username/password or X509-based authentication\n- the server has a defect causing it to send null/empty or zeroed nonces \n\n### Patches\nThe 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`.\n\n### Workarounds\nDo not use username/password or X509-based authentication with `SecurityPolicy` of `None`.\n\n### References\nhttps://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2019-19135.pdf\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue at [https://github.com/eclipse/milo/issues](https://github.com/eclipse/milo/issues)\n* Email [the mailing list](mailto:milo-dev@eclipse.org)","status":"published","published":"2020-03-16T22:46:50Z","modified":"2023-02-01T05:03:03Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-330","CWE-522"],"updated_at":"2026-11-02T14:36:31.364752Z"}],"nvd":[{"id":"CVE-2019-19135","description":"In OPC Foundation OPC UA .NET Standard codebase 1.4.357.28, servers do not create sufficiently random numbers in OPCFoundation.NetStandard.Opc.Ua before 1.4.359.31, which allows man in the middle attackers to reuse encrypted user credentials sent over the network.","status":"published","published":"2020-03-16T16:15:11.937Z","modified":"2026-06-17T02:26:12.86Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-330"],"updated_at":"2026-11-02T14:05:45.254119Z"}],"osv":[{"id":"CVE-2019-19135","description":"In OPC Foundation OPC UA .NET Standard codebase 1.4.357.28, servers do not create sufficiently random numbers in OPCFoundation.NetStandard.Opc.Ua before 1.4.359.31, which allows man in the middle attackers to reuse encrypted user credentials sent over the network.","status":"published","published":"2020-03-16T16:15:11.937Z","modified":"2026-10-24T10:30:34.759172724Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:12.010761Z"},{"id":"GHSA-pq4w-qm9g-qx68","title":"Insufficient Nonce Validation in Eclipse Milo Client","description":"### Impact\nCredential replay affecting those connected to a server when *all 3* of the following conditions are met:\n- `SecurityPolicy` is `None`\n- using username/password or X509-based authentication\n- the server has a defect causing it to send null/empty or zeroed nonces \n\n### Patches\nThe 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`.\n\n### Workarounds\nDo not use username/password or X509-based authentication with `SecurityPolicy` of `None`.\n\n### References\nhttps://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2019-19135.pdf\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue at [https://github.com/eclipse/milo/issues](https://github.com/eclipse/milo/issues)\n* Email [the mailing list](mailto:milo-dev@eclipse.org)","status":"published","published":"2020-03-16T22:46:50Z","modified":"2024-02-16T08:06:53.192281Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-330","CWE-522"],"updated_at":"2026-11-02T15:46:53.700556Z"}]}}