OPC UA applications can allow a remote attacker to determine a Server's private key
An issue was discovered in OPC UA .NET Standard Stack and Sample Code before GitHub commit 2018-04-12, and OPC UA .NET Legacy Stack and Sample Code before GitHub commit 2018-03-13. A vulnerability in OPC UA applications can allow a remote attacker to determine a Server's private key by sending carefully constructed bad UserIdentityTokens as part of an oracle attack.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | OPCFoundation.NetStandard.Opc.Ua | < 1.3.352.12 | 1.3.352.12 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2018-7559
- https://github.com/OPCFoundation/UA-.NET-Legacy/commit/e2a781b38efb8686d2bd850c2f2372b5c670bc45
- https://github.com/OPCFoundation/UA-.NETStandard/commit/ebcf026a54dd0c9052cff009d96d827ac923d150
- https://github.com/OPCFoundation/UA-.NETStandard
- https://github.com/advisories/GHSA-gr4c-5rq6-cgh3
- https://opcfoundation-onlineapplications.org/faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2018-7559.pdf
- http://www.securityfocus.com/bid/108688
- CVSS vector
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
-- Platform
- .NET (NuGet)
- Package
OPCFoundation.NetStandard.Opc.Ua- Disclosed
- 16.10.2018
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-gr4c-5rq6-cgh3 - CC BY 4.0
Vulnerability history: OPCFoundation.NetStandard.Opc.Ua
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 10.2018 10.2024
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 4
Disclosures per year
- 2018: 3
- 2019: 0
- 2020: 0
- 2021: 1
- 2022: 0
- 2023: 0
- 2024: 2
- 2025: 0
- 2026: 0
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OPC UA applications can allow a remote attacker to determine a Server's private key this entry
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