Loading...
Skip to main content
GeekWala

CVE-2020-8867 — Vulnerability in OPCFoundation.NetStandard.Opc.Ua...

MEDIUM

Insufficient Session Expiration and TOCTOU Race Condition in OPC FOundation UA .Net Standard

Published August 2, 2021Updated February 17, 2024Source: osv

Summary

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.

Advisory Timeline

  • First published August 2, 2021 (1897 days ago).
  • Last revised February 17, 2024 — 929 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet
Update OPCFoundation.NetStandard.Opc.Ua to 1.4.359.31 or later
dotnet add package OPCFoundation.NetStandard.Opc.Ua --version 1.4.359.31

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: nuget (1).

PackageEcosystemAffectedFixed In
OPCFoundation.NetStandard.Opc.Ua
nuget
0.4.0, 0.4.1, 0.4.3, 0.4.4 (+30 more)1.4.359.31

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Frequently Asked Questions

What is CVE-2020-8867?
Insufficient Session Expiration and TOCTOU Race Condition in OPC FOundation UA .Net Standard This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2020-8867?
CVE-2020-8867 affects OPCFoundation.NetStandard.Opc.Ua. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2020-8867 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-9q94-v7ch-mxqw

Related CVEs

More NuGet advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies