# CVE-2017-11770: Improper Certificate Validation

Source: https://junglewise.ai/threats/cve-2017-11770-improper-certificate-validation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-04-12  
License: CC BY 4.0 with a link back

CVE-2017-11770 · Severity: low · CVSS 3 · Published 2022-04-12

Improper Certificate Validation

Technologies: [Microsoft.NETCore.App (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app). Vendors: [NuGet](https://junglewise.ai/threats/vendors/nuget).

## Quick answers

**Is CVE-2017-11770 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2017-11770 being exploited in the wild.

**How severe is CVE-2017-11770?** Low severity, with a CVSS score of 3, published 12 April 2022.

**Which products and versions are affected?** Microsoft.NETCore.App (NuGet) ECOSYSTEM:introduced=1.0.0,fixed=2.0.3; System.Security.Cryptography.X509Certificates (NuGet) ECOSYSTEM:introduced=4.0.0,fixed=4.1.2.

**Is there a fix for CVE-2017-11770?** Yes. Microsoft.NETCore.App (NuGet): upgrade to 2.0.3 or later; System.Security.Cryptography.X509Certificates (NuGet): upgrade to 4.1.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2017-11770?** Check whether you run Microsoft.NETCore.App (NuGet) or System.Security.Cryptography.X509Certificates (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 2.0.3 or later

  ```sh
  dotnet add package Microsoft.NETCore.App --version 2.0.3
  ```

- System.Security.Cryptography.X509Certificates (NuGet): upgrade to 4.1.2 or later

  ```sh
  dotnet add package System.Security.Cryptography.X509Certificates --version 4.1.2
  ```


## Affected products

- Microsoft.NETCore.App (NuGet) ECOSYSTEM:introduced=1.0.0,fixed=2.0.3
- System.Security.Cryptography.X509Certificates (NuGet) ECOSYSTEM:introduced=4.0.0,fixed=4.1.2

## Identifiers

- CVE-2017-11770
- GHSA-7mfr-774f-w5r9

## 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)
- [Improper Input Validation in Microsoft.NETCore.App](https://junglewise.ai/threats/cve-2017-8585-improper-input-validation-in-microsoft-netcore-app)