# CVE-2018-8409: Denial of service vulnerability exists when System.IO.Pipelines improperly handles requests

Source: https://junglewise.ai/threats/cve-2018-8409-denial-of-service-vulnerability-exists-when-system-io-pipelines  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2018-10-16  
License: CC BY 4.0 with a link back

CVE-2018-8409 · Severity: low · CVSS 3.1 · Published 2018-10-16

Denial of service vulnerability exists when System.IO.Pipelines improperly handles requests

Technologies: [Microsoft.AspNetCore.All (NuGet)](https://junglewise.ai/threats/technologies/microsoft-aspnetcore-all), [Microsoft.AspNetCore.App (NuGet)](https://junglewise.ai/threats/technologies/microsoft-aspnetcore-app). Vendors: [NuGet](https://junglewise.ai/threats/vendors/nuget).

## Quick answers

**Is CVE-2018-8409 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2018-8409 being exploited in the wild.

**How severe is CVE-2018-8409?** Low severity, with a CVSS score of 3.1, published 16 October 2018.

**Which products and versions are affected?** Microsoft.AspNetCore.All (NuGet) ECOSYSTEM:introduced=2.1.0,fixed=2.1.4; Microsoft.AspNetCore.App (NuGet) ECOSYSTEM:introduced=2.1.0,fixed=2.1.4; System.IO.Pipelines (NuGet) ECOSYSTEM:introduced=4.5.0,fixed=4.5.1.

**Is there a fix for CVE-2018-8409?** Yes. Microsoft.AspNetCore.All (NuGet): upgrade to 2.1.4 or later; Microsoft.AspNetCore.App (NuGet): upgrade to 2.1.4 or later; System.IO.Pipelines (NuGet): upgrade to 4.5.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2018-8409?** Check whether you run Microsoft.AspNetCore.All (NuGet), Microsoft.AspNetCore.App (NuGet) or System.IO.Pipelines (NuGet) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Microsoft.AspNetCore.All (NuGet): upgrade to 2.1.4 or later

  ```sh
  dotnet add package Microsoft.AspNetCore.All --version 2.1.4
  ```

- Microsoft.AspNetCore.App (NuGet): upgrade to 2.1.4 or later

  ```sh
  dotnet add package Microsoft.AspNetCore.App --version 2.1.4
  ```

- System.IO.Pipelines (NuGet): upgrade to 4.5.1 or later

  ```sh
  dotnet add package System.IO.Pipelines --version 4.5.1
  ```


## Affected products

- Microsoft.AspNetCore.All (NuGet) ECOSYSTEM:introduced=2.1.0,fixed=2.1.4
- Microsoft.AspNetCore.App (NuGet) ECOSYSTEM:introduced=2.1.0,fixed=2.1.4
- System.IO.Pipelines (NuGet) ECOSYSTEM:introduced=4.5.0,fixed=4.5.1

## Identifiers

- CVE-2018-8409
- GHSA-j378-6mmw-hqfr

## Related threats

- [Cookie parsing failure](https://junglewise.ai/threats/cve-2020-1045-cookie-parsing-failure)
- [ASP.NET Core Denial of Service Vulnerability](https://junglewise.ai/threats/cve-2020-1597-asp-net-core-denial-of-service-vulnerability)
- [Remote code execution in ASP.NET Core](https://junglewise.ai/threats/cve-2020-0603-remote-code-execution-in-asp-net-core)
- [Denial of service in ASP.NET Core](https://junglewise.ai/threats/cve-2020-0602-denial-of-service-in-asp-net-core)
- [Open redirect in ASP.NET Core](https://junglewise.ai/threats/cve-2019-1075-open-redirect-in-asp-net-core)