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Improper Certificate Validation in OPCFoundation.NetStandard.Opc.Ua.Core

Moderate severity GitHub Reviewed Published Nov 19, 2021 to the GitHub Advisory Database • Updated Jan 29, 2023

Package

nuget OPCFoundation.NetStandard.Opc.Ua.Core (NuGet)

Affected versions

<= 1.4.365.2

Patched versions

1.4.365.10

Description

A Privilege Elevation vulnerability in OPC UA .NET Standard Stack 1.4.363.107 allows attackers to establish a connection using invalid certificates.

References

Published by the National Vulnerability Database Feb 16, 2021
Reviewed May 7, 2021
Published to the GitHub Advisory Database Nov 19, 2021
Last updated Jan 29, 2023

Severity

Moderate

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

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

EPSS score

0.047%
(19th percentile)

Weaknesses

CVE ID

CVE-2020-29457

GHSA ID

GHSA-mjww-934m-h4jw

Source code

Credits

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