CVE-2018-8409

A denial of service vulnerability exists when System.IO.Pipelines improperly handles requests, aka "System.IO.Pipelines Denial of Service." This affects .NET Core 2.1, System.IO.Pipelines, ASP.NET Core 2.1.

This vulnerability affects dotnet as a language generally, and the Sytem.IO.Pipelines package specifically. Any software that uses this package, and who is running on a system whose .NET Core SDK version is less than 2.1.402 or whose highest Microsoft.AspNetCore.App runtime version is less that 2.1.4 is vulnerable to this issue. You can check this by running dotnet --info. This vulnerability makes affected software using the System.IO.Pipeline package weak to remote unauthenticated exploiters who provide particular web requests to said application. Microsoft suggests the following: "To update ASP.NET Core 2.1 you should download and install the .NET Core SDK 2.1.402 on your development machines and build servers, and the .NET Core Runtime 2.1.4 on your deployment servers. Your application will roll forward to these versions on an application restart."