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ASP.NET Core and Visual Studio Denial of Service Vulnerability

High severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Oct 9, 2024

Package

nuget Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet)

Affected versions

>= 3.1.0, < 3.1.11
>= 5.0.0, < 5.0.2

Patched versions

3.1.11
5.0.2
nuget Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet)
>= 3.1.0, < 3.1.11
>= 5.0.0, < 5.0.2
3.1.11
5.0.2
nuget Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet)
= 5.0.1
5.0.2
nuget Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet)
>= 3.1.0, < 3.1.11
>= 5.0.0, < 5.0.2
3.1.11
5.0.2
nuget Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet)
>= 3.1.0, < 3.1.11
>= 5.0.0, < 5.0.2
3.1.11
5.0.2
nuget Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet)
>= 3.1.0, < 3.1.11
>= 5.0.0, < 5.0.2
3.1.11
5.0.2
nuget Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet)
>= 3.1.0, < 3.1.11
>= 5.0.0, < 5.0.2
3.1.11
5.0.2
nuget Microsoft.AspNetCore.App.Runtime.win-arm (NuGet)
>= 3.1.0, < 3.1.11
>= 5.0.0, < 5.0.2
3.1.11
5.0.2
nuget Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet)
>= 3.1.0, < 3.1.11
>= 5.0.0, < 5.0.2
3.1.11
5.0.2
nuget Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet)
>= 3.1.0, < 3.1.11
>= 5.0.0, < 5.0.2
3.1.11
5.0.2
nuget Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet)
>= 3.1.0, < 3.1.11
>= 5.0.0, < 5.0.2
3.1.11
5.0.2
nuget Microsoft.AspNetCore.Server.Kestrel.Core (NuGet)
< 2.1.25
2.1.25

Description

A denial-of-service vulnerability exists in the way Kestrel parses HTTP/2 requests. The security update addresses the vulnerability by fixing the way the Kestrel parses HTTP/2 requests. Users are advised to upgrade.

References

Published by the National Vulnerability Database Jan 12, 2021
Published to the GitHub Advisory Database May 24, 2022
Reviewed Oct 24, 2022
Last updated Oct 9, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.205%
(59th percentile)

Weaknesses

No CWEs

CVE ID

CVE-2021-1723

GHSA ID

GHSA-242j-2gm6-5rwx

Source code

No known source code

Credits

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