# CVE-2017-11883: Denial of service in ASP.NET Core

Source: https://junglewise.ai/threats/cve-2017-11883-denial-of-service-in-asp-net-core  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-05-13  
License: CC BY 4.0 with a link back

CVE-2017-11883 · Severity: low · CVSS 3 · Published 2022-05-13

Denial of service in ASP.NET Core

Technologies: [Microsoft.AspNetCore.Server.HttpSys (NuGet)](https://junglewise.ai/threats/technologies/microsoft-aspnetcore-server-httpsys). Vendors: [NuGet](https://junglewise.ai/threats/vendors/nuget).

## Quick answers

**Is CVE-2017-11883 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2017-11883 being exploited in the wild.

**How severe is CVE-2017-11883?** Low severity, with a CVSS score of 3, published 13 May 2022.

**Which products and versions are affected?** Microsoft.AspNetCore.Server.HttpSys (NuGet) ECOSYSTEM:introduced=2.0.0,fixed=2.0.2; Microsoft.AspNetCore.Server.WebListener (NuGet) ECOSYSTEM:introduced=1.0.0,fixed=1.0.6; Microsoft.Net.Http.Server (NuGet) ECOSYSTEM:introduced=1.0.0,fixed=1.0.6.

**Is there a fix for CVE-2017-11883?** Yes. Microsoft.AspNetCore.Server.HttpSys (NuGet): upgrade to 2.0.2 or later; Microsoft.AspNetCore.Server.WebListener (NuGet): upgrade to 1.0.6 or later; Microsoft.Net.Http.Server (NuGet): upgrade to 1.0.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2017-11883?** Check whether you run Microsoft.AspNetCore.Server.HttpSys (NuGet), Microsoft.AspNetCore.Server.WebListener (NuGet) or Microsoft.Net.Http.Server (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.Server.HttpSys (NuGet): upgrade to 2.0.2 or later

  ```sh
  dotnet add package Microsoft.AspNetCore.Server.HttpSys --version 2.0.2
  ```

- Microsoft.AspNetCore.Server.WebListener (NuGet): upgrade to 1.0.6 or later

  ```sh
  dotnet add package Microsoft.AspNetCore.Server.WebListener --version 1.0.6
  ```

- Microsoft.Net.Http.Server (NuGet): upgrade to 1.0.6 or later

  ```sh
  dotnet add package Microsoft.Net.Http.Server --version 1.0.6
  ```


## Affected products

- Microsoft.AspNetCore.Server.HttpSys (NuGet) ECOSYSTEM:introduced=2.0.0,fixed=2.0.2
- Microsoft.AspNetCore.Server.WebListener (NuGet) ECOSYSTEM:introduced=1.0.0,fixed=1.0.6
- Microsoft.Net.Http.Server (NuGet) ECOSYSTEM:introduced=1.0.0,fixed=1.0.6

## Identifiers

- CVE-2017-11883
- GHSA-f9jc-rrm2-pmfg

## Related threats

- [Microsoft ASP.NET Core denial of service via resource consumption](https://junglewise.ai/threats/duplicate-advisory-microsoft-security-advisory-asp-net-core-denial-of-0f1476a7)
- [Microsoft ASP.NET Core denial of service via resource consumption](https://junglewise.ai/threats/cve-2026-114154-uncontrolled-resource-consumption-in-asp-net-core-allows-an)
- [Open redirect in ASP.NET Core](https://junglewise.ai/threats/cve-2019-1075-open-redirect-in-asp-net-core)