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Uncontrolled Resource Consumption in OPC UA .NET Standard Reference Server

High severity GitHub Reviewed Published May 4, 2023 in OPCFoundation/UA-.NETStandard • Updated May 8, 2024

Package

nuget 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

References

@opcfoundation-org opcfoundation-org published to OPCFoundation/UA-.NETStandard May 4, 2023
Published to the GitHub Advisory Database May 5, 2023
Reviewed May 5, 2023
Published by the National Vulnerability Database May 7, 2024
Last updated May 8, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.046%
(18th percentile)

Weaknesses

CVE ID

CVE-2023-27321

GHSA ID

GHSA-vpf7-r2fv-75m9

Source code

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