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Improper Certificate Validation in Microsoft .NET Framework components

High severity GitHub Reviewed Published Oct 16, 2018 to the GitHub Advisory Database • Updated Jan 29, 2023

Package

nuget Microsoft.NETCore.UniversalWindowsPlatform (NuGet)

Affected versions

>= 5.2.0, < 5.2.4
>= 5.3.0, < 5.3.5
>= 5.4.0, < 5.4.2
>= 6.0.0, < 6.0.6

Patched versions

5.2.4
5.3.5
5.4.2
6.0.6
nuget System.Private.ServiceModel (NuGet)
= 4.4.0
= 4.3.0
= 4.1.0
4.4.1
4.3.1
4.1.1
nuget System.ServiceModel.Duplex (NuGet)
= 4.4.0
= 4.3.0
= 4.0.1
4.4.1
4.3.1
4.0.2
nuget System.ServiceModel.Http (NuGet)
= 4.4.0
= 4.3.0
= 4.1.0
4.4.1
4.3.1
4.1.1
nuget System.ServiceModel.NetTcp (NuGet)
= 4.4.0
= 4.3.0
= 4.1.0
4.4.1
4.3.1
4.1.1
nuget System.ServiceModel.Primitives (NuGet)
= 4.4.0
= 4.3.0
= 4.1.0
4.4.1
4.3.1
4.1.1
nuget System.ServiceModel.Security (NuGet)
= 4.4.0
= 4.3.0
= 4.0.1
4.4.1
4.3.1
4.0.2

Description

Microsoft .NET Framework 2.0 SP2, 3.0 SP2, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, .NET Core 1.0 and 2.0, and PowerShell Core 6.0.0 allow a security feature bypass vulnerability due to the way certificates are validated, aka ".NET Security Feature Bypass Vulnerability."

References

Published by the National Vulnerability Database Jan 10, 2018
Published to the GitHub Advisory Database Oct 16, 2018
Reviewed Jun 16, 2020
Last updated Jan 29, 2023

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

EPSS score

0.286%
(69th percentile)

Weaknesses

CVE ID

CVE-2018-0786

GHSA ID

GHSA-jc8g-xhw5-6x46

Source code

No known source code

Credits

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