CVE-2018-8356 Improper Certificate Validation in Microsoft .NET Framework components
Attackers can bypass certificate validation in Microsoft .NET Framework components, potentially undermining secure communications.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-8356?
CVE-2018-8356 is a medium-severity vulnerability in Microsoft .Net Framework, published on 11 Jul 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security feature bypass vulnerability exists when Microsoft .NET Framework components do not correctly validate certificates, aka ".NET Framework Security Feature Bypass Vulnerability." This affects .NET Framework 4.7.2, Microsoft .NET Framework 3.0, Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2, ASP.NET Core 1.1, Microsoft .NET Framework 4.5.2, ASP.NET Core 2.0, ASP.NET Core 1.0, .NET Core 1.1, Microsoft .NET Framework 3.5, Microsoft .NET Framework 3.5.1, Microsoft .NET Framework 4.6/4.6.1/4.6.2, .NET Core 1.0, .NET Core 2.0, Microsoft .NET Framework 4.6, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2, Microsoft .NET Framework 4.7.2.
Weakness: CWE-295
Which versions are affected by CVE-2018-8356?
40 open source packages ship an affected version, including System.ServiceModel.NetTcp, System.Private.ServiceModel and System.ServiceModel.Duplex. It affects 5 products.
| Package | Affected | Fixed in |
|---|---|---|
System.ServiceModel.NetTcp NuGet | From 4.0.0 | 4.1.3 |
System.ServiceModel.NetTcp NuGet | From 4.0.0 | 4.1.3 |
System.ServiceModel.NetTcp NuGet | From 4.3.0 | 4.3.3 |
System.ServiceModel.NetTcp NuGet | From 4.3.0 | 4.3.3 |
System.ServiceModel.NetTcp NuGet | From 4.4.0 | 4.4.4 |
System.ServiceModel.NetTcp NuGet | From 4.4.0 | 4.4.4 |
34 more packages
System.ServiceModel.NetTcp NuGet | From 4.5.0 | 4.5.3 |
System.ServiceModel.NetTcp NuGet | From 4.5.0 | 4.5.3 |
System.Private.ServiceModel NuGet | From 4.0.0 | 4.1.3 |
System.Private.ServiceModel NuGet | From 4.0.0 | 4.1.3 |
System.Private.ServiceModel NuGet | From 4.3.0 | 4.3.3 |
System.Private.ServiceModel NuGet | From 4.3.0 | 4.3.3 |
System.Private.ServiceModel NuGet | From 4.4.0 | 4.4.4 |
System.Private.ServiceModel NuGet | From 4.4.0 | 4.4.4 |
System.Private.ServiceModel NuGet | From 4.5.0 | 4.5.3 |
System.Private.ServiceModel NuGet | From 4.5.0 | 4.5.3 |
System.ServiceModel.Duplex NuGet | From 4.0.0 | 4.0.4 |
System.ServiceModel.Duplex NuGet | From 4.0.0 | 4.0.4 |
System.ServiceModel.Duplex NuGet | From 4.3.0 | 4.3.3 |
System.ServiceModel.Duplex NuGet | From 4.3.0 | 4.3.3 |
System.ServiceModel.Duplex NuGet | From 4.4.0 | 4.4.4 |
System.ServiceModel.Duplex NuGet | From 4.4.0 | 4.4.4 |
System.ServiceModel.Duplex NuGet | From 4.5.0 | 4.5.3 |
System.ServiceModel.Duplex NuGet | From 4.5.0 | 4.5.3 |
System.ServiceModel.Http NuGet | From 4.0.0 | 4.1.3 |
System.ServiceModel.Http NuGet | From 4.0.0 | 4.1.3 |
System.ServiceModel.Http NuGet | From 4.3.0 | 4.3.3 |
System.ServiceModel.Http NuGet | From 4.3.0 | 4.3.3 |
System.ServiceModel.Http NuGet | From 4.4.0 | 4.4.4 |
System.ServiceModel.Http NuGet | From 4.4.0 | 4.4.4 |
System.ServiceModel.Http NuGet | From 4.5.0 | 4.5.3 |
System.ServiceModel.Http NuGet | From 4.5.0 | 4.5.3 |
System.ServiceModel.Primitives NuGet | From 4.0.0 | 4.1.3 |
System.ServiceModel.Primitives NuGet | From 4.0.0 | 4.1.3 |
System.ServiceModel.Primitives NuGet | From 4.3.0 | 4.3.3 |
System.ServiceModel.Primitives NuGet | From 4.3.0 | 4.3.3 |
System.ServiceModel.Primitives NuGet | From 4.4.0 | 4.4.4 |
System.ServiceModel.Primitives NuGet | From 4.4.0 | 4.4.4 |
System.ServiceModel.Primitives NuGet | From 4.5.0 | 4.5.3 |
System.ServiceModel.Primitives NuGet | From 4.5.0 | 4.5.3 |
Products include Microsoft .Net Core, Microsoft .Net Framework, Microsoft .Net Framework Developer Pack, Microsoft Asp.net Core, Microsoft Powershell Core.
How do I fix CVE-2018-8356?
Upgrade System.ServiceModel.NetTcp to a fixed version for your release line: 4.1.3, 4.3.3, 4.4.4 or 4.5.3.
Is CVE-2018-8356 being exploited?
There is no known exploitation of CVE-2018-8356 in the wild and no public exploit code.
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Sources
Also known as GHSA-p9wx-v264-q34p.