High severity7.5NVD Advisory· Published Apr 22, 2020· Updated Jun 17, 2026
CVE-2020-8867
CVE-2020-8867
Description
This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of OPC Foundation UA .NET Standard 1.04.358.30. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of sessions. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to create a denial-of-service condition against the application. Was ZDI-CAN-10295.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
OPCFoundation.NetStandard.Opc.UaNuGet | < 1.4.359.31 | 1.4.359.31 |
Affected products
2- Range: 1.04.358.30
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-9q94-v7ch-mxqwghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2020-8867ghsaADVISORY
- opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2020-8867.pdfnvdVendor AdvisoryWEB
- www.zerodayinitiative.com/advisories/ZDI-20-536/nvdThird Party AdvisoryVDB Entry
- github.com/OPCFoundation/UA-.NETStandard/releases/tag/1.4.359.31ghsaWEB
- www.zerodayinitiative.com/advisories/ZDI-20-536ghsaWEB
News mentions
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