CVE-2018-7559

Name: CVE-2018-7559
Creator: NVD / NIST
Published: 2018-06-13T18:29:00.62+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.58%

Last modified Jun 17, 2026

CVE-2018-7559 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.58% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

1.58%

72.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-320

Affected Software

Vendor	Product	Versions
Opcfoundation	Ua-.Net-Legacy	<= 1.03.342
Opcfoundation	Ua-.Netstandard	<= 1.03.352.10

References

http://www.securityfocus.com/bid/108688
https://github.com/OPCFoundation/UA-.NET-Legacy/commit/e2a781b38efb8686d2bd850c2f2372b5c670bc45Patch, Third Party Advisory
https://github.com/OPCFoundation/UA-.NETStandard/commit/ebcf026a54dd0c9052cff009d96d827ac923d150Patch, Third Party Advisory
https://opcfoundation-onlineapplications.org/faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2018-7559.pdfThird Party Advisory
http://www.securityfocus.com/bid/108688
https://github.com/OPCFoundation/UA-.NET-Legacy/commit/e2a781b38efb8686d2bd850c2f2372b5c670bc45Patch, Third Party Advisory
https://github.com/OPCFoundation/UA-.NETStandard/commit/ebcf026a54dd0c9052cff009d96d827ac923d150Patch, Third Party Advisory
https://opcfoundation-onlineapplications.org/faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2018-7559.pdfThird Party Advisory

Timeline

Published: Jun 13, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-7559?

How severe is CVE-2018-7559?

Severity scoring for CVE-2018-7559 is pending analysis. The EPSS model estimates a 1.58% probability of exploitation in the next 30 days.

How do I fix CVE-2018-7559?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-7559?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST