Input validation error in Microsoft .NET Core and Visual Studio - CVE-2022-21986

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Main Vulnerability Database Vulnerabilities #VU60380

Input validation error in Microsoft .NET Core and Visual Studio - CVE-2022-21986

Published: February 8, 2022 / Updated: February 9, 2022


Vulnerability identifier: #VU60380
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2022-21986
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in ASP.NET Core Krestel when pooling HTTP/2 and HTTP/3 headers. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.


Affected software

Microsoft .NET Core
Visual Studio
rh-dotnet50-dotnet (Red Hat package)
dotnet-apphost-pack-5.0
dotnet-hostfxr-5.0
dotnet-runtime-5.0
dotnet-targeting-pack-5.0
dotnet5.0 (Red Hat package)
dotnet-sdk-5.0
dotnet-sdk-5.0-source-built-artifacts
dotnet-templates-5.0
dotnet-targeting-pack-6.0
dotnet-runtime-6.0
dotnet-hostfxr-6.0
dotnet-host
dotnet-apphost-pack-6.0
rh-dotnet60-dotnet (Red Hat package)
dotnet6.0 (Red Hat package)
dotnet6.0
dotnet
dotnet-sdk-6.0
dotnet-sdk-6.0-source-built-artifacts
dotnet-templates-6.0
netstandard-targeting-pack-2.1
Anolis OS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for IBM z Systems
Red Hat CodeReady Linux Builder for x86_64
Fedora
IBM Robotic Process Automation

How to mitigate CVE-2022-21986

Install updates from vendor's website.

rh-dotnet50-dotnet (Red Hat package) - update to 5.0.211-1.el7_9
IBM Robotic Process Automation - update to 21.0.2.2
dotnet-apphost-pack-5.0 - update to 5.0.14-1.0.1
dotnet-hostfxr-5.0 - update to 5.0.14-1.0.1
dotnet-runtime-5.0 - update to 5.0.14-1.0.1
dotnet-targeting-pack-5.0 - update to 5.0.14-1.0.1
dotnet5.0 (Red Hat package) - update to 5.0.211-1.el8_5
dotnet-sdk-5.0 - update to 5.0.211-1.0.1
dotnet-sdk-5.0-source-built-artifacts - update to 5.0.211-1.0.1
dotnet-templates-5.0 - update to 5.0.211-1.0.1
dotnet-targeting-pack-6.0 - update to 6.0.2-1.0.1
dotnet-runtime-6.0 - update to 6.0.2-1.0.1
dotnet-hostfxr-6.0 - update to 6.0.2-1.0.1
dotnet-host - update to 6.0.2-1.0.1
dotnet-apphost-pack-6.0 - update to 6.0.2-1.0.1
rh-dotnet60-dotnet (Red Hat package) - update to 6.0.102-1.el7_9
dotnet6.0 (Red Hat package) - update to 6.0.102-1.el8_5
dotnet6.0 - addressed in versions 6.0.102-1.fc34, 6.0.102-1.fc35
dotnet - update to 6.0.102-1.0.1
dotnet-sdk-6.0 - update to 6.0.102-1.0.1
dotnet-sdk-6.0-source-built-artifacts - update to 6.0.102-1.0.1
dotnet-templates-6.0 - update to 6.0.102-1.0.1
netstandard-targeting-pack-2.1 - update to 6.0.102-1.0.1

External References

Related Security Bulletins