Description
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.
References (4)
Core 4
Core References
Third Party Advisory x_refsource_confirm
https://opcfoundation-onlineapplications.org/faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2018-7559.pdf
Patch, Third Party Advisory x_refsource_confirm
https://github.com/OPCFoundation/UA-.NETStandard/commit/ebcf026a54dd0c9052cff009d96d827ac923d150
Patch, Third Party Advisory x_refsource_confirm
https://github.com/OPCFoundation/UA-.NET-Legacy/commit/e2a781b38efb8686d2bd850c2f2372b5c670bc45
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/108688
Scores
CVSS v3
5.3
EPSS
0.0027
EPSS Percentile
50.0%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Details
CWE
CWE-320
Status
published
Products (3)
nuget/OPCFoundation.NetStandard.Opc.Ua
0 - 1.3.352.12NuGet
opcfoundation/ua-.net-legacy
< 1.03.342
opcfoundation/ua-.netstandard
< 1.03.352.10
Published
Jun 13, 2018
Tracked Since
Feb 18, 2026