Security Update for the OPC UA .NET Standard Reference Server

High

opcfoundation-org published GHSA-vpf7-r2fv-75m9

May 4, 2023

Package

OPCFoundation.NetStandard.Opc.Ua.Server (NuGet)

Affected versions

<1.4.371.86

Patched versions

1.4.371.86

Description

This security update resolves a vulnerability in the OPC UA .NET Standard Reference Server that allows
remote attackers to send malicious requests that consume all memory available to the server.

https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2023-27321.pdf

Severity

High

7.5

/ 10

CVSS base metrics

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