GHSA-9q94-v7ch-mxqw
Insufficient Session Expiration and TOCTOU Race Condition in OPC FOundation UA .Net Standard
Quick fix
GHSA-9q94-v7ch-mxqw — OPCFoundation.NetStandard.Opc.Ua: upgrade to the fixed version with the command below.
dotnet add package OPCFoundation.NetStandard.Opc.Ua --version 1.4.359.31Details
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.
Are you affected?
Enter the version of the package you're using.
Affected packages
0Fixed in: 1.4.359.31dotnet add package OPCFoundation.NetStandard.Opc.Ua --version 1.4.359.31References
- https://nvd.nist.gov/vuln/detail/CVE-2020-8867[ADVISORY]
- https://github.com/OPCFoundation/UA-.NETStandard/releases/tag/1.4.359.31[WEB]
- https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2020-8867.pdf[WEB]
- https://www.zerodayinitiative.com/advisories/ZDI-20-536[WEB]