Input validation error in ASP.NET Core MVC and Visual Studio - CVE-2020-1597

Vulnerability identifier: #VU45514

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-2020-1597

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

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 the ASP.NET Core. A remote attacker can send specially crafted requests to the ASP.NET Core application and perform a denial of service (DoS) attack.

ASP.NET Core MVC
Visual Studio
Red Hat Enterprise Linux for x86_64
Anolis OS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Fedora
dotnet-build-reference-packages
aspnetcore-runtime-3.1
aspnetcore-targeting-pack-3.1
dotnet-apphost-pack-3.1
dotnet-hostfxr-3.1
dotnet-runtime-3.1
dotnet-targeting-pack-3.1
rh-dotnet31-dotnet (Red Hat package)
dotnet3.1 (Red Hat package)
dotnet3.1
dotnet-sdk-3.1
dotnet-sdk-3.1-source-built-artifacts
dotnet-templates-3.1

Install updates from vendor's website.

dotnet-build-reference-packages - update to 0-5.20200608git1b1a695.fc32
aspnetcore-runtime-3.1 - update to 3.1.26-1.0.1
aspnetcore-targeting-pack-3.1 - update to 3.1.26-1.0.1
dotnet-apphost-pack-3.1 - update to 3.1.26-1.0.1
dotnet-hostfxr-3.1 - update to 3.1.26-1.0.1
dotnet-runtime-3.1 - update to 3.1.26-1.0.1
dotnet-targeting-pack-3.1 - update to 3.1.26-1.0.1
rh-dotnet31-dotnet (Red Hat package) - update to 3.1.107-1.el7
dotnet3.1 (Red Hat package) - update to 3.1.107-1.el8_2
dotnet3.1 - addressed in versions 3.1.107-1.fc32, 3.1.107-1.fc33
dotnet-sdk-3.1 - update to 3.1.420-1.0.1
dotnet-sdk-3.1-source-built-artifacts - update to 3.1.420-1.0.1
dotnet-templates-3.1 - update to 3.1.420-1.0.1

• https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2020-1597

• Denial of service in Microsoft ASP.NET Core
• .NET Core on Red Hat Enterprise Linux update for rh-dotnet31-dotnet
• Red Hat Enterprise Linux 8 update for .NET Core 3.1
• Anolis OS update for dotnet3.1
• Fedora 32 update for dotnet-build-reference-packages, dotnet3.1
• Fedora 33 update for dotnet3.1