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Medium

Moderate severity vulnerability that affects Microsoft.AspNetCore.All, Microsoft.AspNetCore.App, and Microsoft.AspNetCore.Server.Kestrel.Core

  • Disclosed: 16.10.2018
  • Updated: 11.10.2026 11:23

Microsoft is aware of a denial of service vulnerability in ASP.NET Core when a malformed request is terminated. An attacker who successfully exploited this vulnerability could cause a denial of service attack.

The update addresses the vulnerability by correcting how ASP.NET Core handles such requests.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
.NET (NuGet) Microsoft.AspNetCore.All >= 2.0.0, < 2.0.9, >= 2.1.0, < 2.1.2 2.0.9, 2.1.2
.NET (NuGet) Microsoft.AspNetCore.App >= 2.1.0, < 2.1.2 2.1.2
.NET (NuGet) Microsoft.AspNetCore.Server.Kestrel.Core >= 2.0.0, < 2.0.4, >= 2.1.0, < 2.1.2 2.0.4, 2.1.2

References

CVSS score -
Weakness (CWE)
-
Platform
.NET (NuGet)
Package
Microsoft.AspNetCore.All, Microsoft.AspNetCore.App, Microsoft.AspNetCore.Server.Kestrel.Core
Disclosed
16.10.2018
Updated
11.10.2026 11:23

Sources and licenses

OSV / GitHub Advisory Database - GHSA-cgpw-2gph-2r9g - CC BY 4.0

Vulnerability history: Microsoft.AspNetCore.App

All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.

Total entries
8
First → latest
10.2018 05.2022
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 5
  • Medium 3

Disclosures per year

  1. Cookie parsing failure
    High · 7.5 CVE-2020-1045 < 2.1.22 2.1.22
  2. ASP.NET Core Denial of Service Vulnerability
    High · 7.5 CVE-2020-1597 >= 2.1.0, < 2.1.21 2.1.21
  3. Denial of service in ASP.NET Core
    Medium CVE-2020-0602 >= 3.1.0, < 3.1.1, >= 3.0.0, < 3.0.1, >= 2.1.0, < 2.1.15 3.1.1, 3.0.1, 2.1.15
  4. Remote code execution in ASP.NET Core
    High CVE-2020-0603 >= 3.1.0, < 3.1.1, >= 3.0.0, < 3.0.1, >= 2.1.0, < 2.1.15 3.1.1, 3.0.1, 2.1.15
  5. Open redirect in ASP.NET Core
    Medium · 6.1 CVE-2019-1075 >= 2.2.0, < 2.2.6, >= 2.1.0, < 2.1.12 2.2.6, 2.1.12
  6. Denial of service in ASP.NET Core
    High · 7.5 CVE-2019-0564 >= 2.2.0, < 2.2.1, >= 2.1.0, < 2.1.7 2.2.1, 2.1.7
  7. Moderate severity vulnerability that affects Microsoft.AspNetCore.All, Microsoft.AspNetCore.App, and Microsoft.AspNetCore.Server.Kestrel.Core this entry
    Medium ghsa-cgpw-2gph-2r9g >= 2.1.0, < 2.1.2 2.1.2
  8. Denial of service vulnerability exists when System.IO.Pipelines improperly handles requests
    High · 7.5 CVE-2018-8409 >= 2.1.0, < 2.1.4 2.1.4

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