# CVE-2019-0657: Improper Input Validation in .Net Framework API's

Source: https://junglewise.ai/threats/cve-2019-0657-improper-input-validation-in-net-framework-api-s  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-05-14  
License: CC BY 4.0 with a link back

CVE-2019-0657 · Severity: low · CVSS 3 · Published 2022-05-14

Improper Input Validation in .Net Framework API's

Technologies: [Microsoft.NETCore.App (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app), [System.Private.Uri (NuGet)](https://junglewise.ai/threats/technologies/system-private-uri). Vendors: [NuGet](https://junglewise.ai/threats/vendors/nuget).

## Quick answers

**Is CVE-2019-0657 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2019-0657 being exploited in the wild.

**How severe is CVE-2019-0657?** Low severity, with a CVSS score of 3, published 14 May 2022.

**Which products and versions are affected?** Microsoft.NETCore.App (NuGet) ECOSYSTEM:introduced=2.2.0,fixed=2.2.2; System.Private.Uri (NuGet) ECOSYSTEM:introduced=4.3.0,fixed=4.3.2.

**Is there a fix for CVE-2019-0657?** Yes. Microsoft.NETCore.App (NuGet): upgrade to 2.2.2 or later; System.Private.Uri (NuGet): upgrade to 4.3.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2019-0657?** Check whether you run Microsoft.NETCore.App (NuGet) or System.Private.Uri (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.NETCore.App (NuGet): upgrade to 2.2.2 or later

  ```sh
  dotnet add package Microsoft.NETCore.App --version 2.2.2
  ```

- System.Private.Uri (NuGet): upgrade to 4.3.2 or later

  ```sh
  dotnet add package System.Private.Uri --version 4.3.2
  ```


## Affected products

- Microsoft.NETCore.App (NuGet) ECOSYSTEM:introduced=2.2.0,fixed=2.2.2
- System.Private.Uri (NuGet) ECOSYSTEM:introduced=4.3.0,fixed=4.3.2

## Identifiers

- CVE-2019-0657
- GHSA-x5qj-9vmx-7g6g

## Related threats

- [.NET Core Information Disclosure Vulnerability](https://junglewise.ai/threats/cve-2021-34485-net-core-information-disclosure-vulnerability)
- [Denial of service in .NET core](https://junglewise.ai/threats/cve-2021-1721-denial-of-service-in-net-core)
- [.NET Framework, SharePoint Server, and Visual Studio Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2020-1147-microsoft-net-framework-sharepoint-and-visual-studio-remote-code)
- [.NET Core & .NET Framework Denial of Service Vulnerability](https://junglewise.ai/threats/cve-2020-1108-net-core-net-framework-denial-of-service-vulnerability)
- [Denial of service in ASP.NET Core](https://junglewise.ai/threats/cve-2019-0981-denial-of-service-in-asp-net-core)