CVE-2018-0786 — Improper Certificate Validation in...

HIGH

Improper Certificate Validation in Microsoft .NET Framework components

Published October 16, 2018Updated November 8, 2023Source: osv

Summary

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."

Advisory Timeline

First published October 16, 2018 (2918 days ago).
Last revised November 8, 2023 — 1848 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet

Update System.ServiceModel.Duplex to 4.0.2 or later

dotnet add package System.ServiceModel.Duplex --version 4.0.2

NuGet

Update Microsoft.NETCore.UniversalWindowsPlatform to 5.3.5 or later

dotnet add package Microsoft.NETCore.UniversalWindowsPlatform --version 5.3.5

NuGet

Update System.ServiceModel.Primitives to 4.4.1 or later

dotnet add package System.ServiceModel.Primitives --version 4.4.1

NuGet

Update System.ServiceModel.Security to 4.3.1 or later

dotnet add package System.ServiceModel.Security --version 4.3.1

NuGet

Update System.ServiceModel.Primitives to 4.1.1 or later

dotnet add package System.ServiceModel.Primitives --version 4.1.1

NuGet

Update Microsoft.NETCore.UniversalWindowsPlatform to 5.2.4 or later

dotnet add package Microsoft.NETCore.UniversalWindowsPlatform --version 5.2.4

NuGet

Update System.ServiceModel.Duplex to 4.4.1 or later

dotnet add package System.ServiceModel.Duplex --version 4.4.1

NuGet

Update System.ServiceModel.Primitives to 4.3.1 or later

dotnet add package System.ServiceModel.Primitives --version 4.3.1

NuGet

Update System.ServiceModel.Http to 4.1.1 or later

dotnet add package System.ServiceModel.Http --version 4.1.1

NuGet

Update System.ServiceModel.Security to 4.0.2 or later

dotnet add package System.ServiceModel.Security --version 4.0.2

NuGet

Update System.Private.ServiceModel to 4.4.1 or later

dotnet add package System.Private.ServiceModel --version 4.4.1

NuGet

Update System.ServiceModel.Http to 4.4.1 or later

dotnet add package System.ServiceModel.Http --version 4.4.1

NuGet

Update System.Private.ServiceModel to 4.1.1 or later

dotnet add package System.Private.ServiceModel --version 4.1.1

NuGet

Update Microsoft.NETCore.UniversalWindowsPlatform to 5.4.2 or later

dotnet add package Microsoft.NETCore.UniversalWindowsPlatform --version 5.4.2

NuGet

Update Microsoft.NETCore.UniversalWindowsPlatform to 6.0.6 or later

dotnet add package Microsoft.NETCore.UniversalWindowsPlatform --version 6.0.6

NuGet

Update System.ServiceModel.Security to 4.4.1 or later

dotnet add package System.ServiceModel.Security --version 4.4.1

NuGet

Update System.ServiceModel.NetTcp to 4.4.1 or later

dotnet add package System.ServiceModel.NetTcp --version 4.4.1

NuGet

Update System.ServiceModel.Duplex to 4.3.1 or later

dotnet add package System.ServiceModel.Duplex --version 4.3.1

NuGet

Update System.ServiceModel.NetTcp to 4.3.1 or later

dotnet add package System.ServiceModel.NetTcp --version 4.3.1

NuGet

Update System.ServiceModel.NetTcp to 4.1.1 or later

dotnet add package System.ServiceModel.NetTcp --version 4.1.1

NuGet

Update System.ServiceModel.Http to 4.3.1 or later

dotnet add package System.ServiceModel.Http --version 4.3.1

NuGet

Update System.Private.ServiceModel to 4.3.1 or later

dotnet add package System.Private.ServiceModel --version 4.3.1

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

Affected Packages (22)

Affects 1 ecosystem: nuget (7).

Package	Ecosystem	Affected	Fixed In
System.ServiceModel.Duplex	nuget	4.0.1	4.0.2
Microsoft.NETCore.UniversalWindowsPlatform	nuget	5.3.0, 5.3.1, 5.3.2, 5.3.3 (+1 more)	5.3.5
System.ServiceModel.Primitives	nuget	4.4.0, 4.4.1-servicing-25917-01	4.4.1
System.ServiceModel.Security	nuget	4.3.0	4.3.1
System.ServiceModel.Primitives	nuget	4.1.0	4.1.1
Microsoft.NETCore.UniversalWindowsPlatform	nuget	5.2.0, 5.2.1, 5.2.2, 5.2.3	5.2.4
System.ServiceModel.Duplex	nuget	4.4.0	4.4.1
System.ServiceModel.Primitives	nuget	4.3.0	4.3.1
System.ServiceModel.Http	nuget	4.1.0	4.1.1
System.ServiceModel.Security	nuget	4.0.1	4.0.2
System.Private.ServiceModel	nuget	4.4.0	4.4.1
System.ServiceModel.Http	nuget	4.4.0	4.4.1
System.Private.ServiceModel	nuget	4.1.0	4.1.1
Microsoft.NETCore.UniversalWindowsPlatform	nuget	5.4.0, 5.4.1	5.4.2
Microsoft.NETCore.UniversalWindowsPlatform	nuget	6.0.1, 6.0.2, 6.0.4, 6.0.5	6.0.6
System.ServiceModel.Security	nuget	4.4.0	4.4.1
System.ServiceModel.NetTcp	nuget	4.4.0	4.4.1
System.ServiceModel.Duplex	nuget	4.3.0	4.3.1
System.ServiceModel.NetTcp	nuget	4.3.0	4.3.1
System.ServiceModel.NetTcp	nuget	4.1.0	4.1.1
System.ServiceModel.Http	nuget	4.3.0	4.3.1
System.Private.ServiceModel	nuget	4.3.0	4.3.1

Vulnerability Classification

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

CWE-295
Improper Certificate ValidationMITRE

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

High

Availability

None

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

References

Frequently Asked Questions

What is CVE-2018-0786?: Improper Certificate Validation in Microsoft .NET Framework components This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2018-0786?: CVE-2018-0786 affects System.ServiceModel.Duplex, Microsoft.NETCore.UniversalWindowsPlatform and System.ServiceModel.Primitives (and 4 more). Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2018-0786 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-jc8g-xhw5-6x46

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