Description
ASP.NET Core Denial of Service Vulnerability
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3) | 16.0 – < 16.4.23 | 16.4.23 |
| Microsoft | Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6) | 16.0.0 – < 16.7.16 | 16.7.16 |
| Microsoft | Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8) | 15.0.0 – < 16.9.7 | 16.9.7 |
| Microsoft | Microsoft Visual Studio 2019 version 16.10 (includes 16.0 - 16.9) | 16.10.0 – < 16.10.1 | 16.10.1 |
| Microsoft | Visual Studio 2019 for Mac version 8.10 | 8.1.0 – < 8.10.1 | 8.10.1 |
| Microsoft | .NET Core 3.1 | 3.1 – < 3.1.16 | 3.1.16 |
| Microsoft | .NET 5.0 | 5.0.0 – < 5.0.7 | 5.0.7 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | dotnet +4 | 5.0.204-1.el8_4 | RHSA-2021:2353 |
| RHEL 8 | dotnet-host +6 | 5.0.7-1.el8_4 | RHSA-2021:2353 |
| RHEL 8 | dotnet-hostfxr-3.1 +5 | 3.1.16-1.el8_4 | RHSA-2021:2352 |
| RHEL 8 | dotnet3.1 +2 | 3.1.116-1.el8_4 | RHSA-2021:2352 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Dotnet 5 | rh-dotnet50-dotnet +3 | 5.0.204-1.el7_9 | RHSA-2021:2351 |
| Red Hat Rhel Dotnet 5 | rh-dotnet50-dotnet-host +6 | 5.0.7-1.el7_9 | RHSA-2021:2351 |
| Red Hat Rhel Dotnet 3 | rh-dotnet31-dotnet +3 | 3.1.116-1.el7_9 | RHSA-2021:2350 |
| Red Hat Rhel Dotnet 3 | rh-dotnet31-dotnet-host +6 | 3.1.16-1.el7_9 | RHSA-2021:2350 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | dotnet +3 | 5.0.204-1.0.1.el8_4 | ELSA-2021-2353 |
| Oracle Linux 8 | dotnet-host +6 | 5.0.7-1.0.1.el8_4 | ELSA-2021-2353 |
| Oracle Linux 8 | dotnet-hostfxr-3.1 +5 | 3.1.16-1.0.1.el8_4 | ELSA-2021-2352 |
| Oracle Linux 8 | dotnet-sdk-3.1 +1 | 3.1.116-1.0.1.el8_4 | ELSA-2021-2352 |
Advisories 6
- RHSA-2021:2352 Red Hat Security Advisory: .NET Core 3.1 security and bugfix update Red Hat Security Advisories (RHSA) · Oct 8, 2026
- RHSA-2021:2353 Red Hat Security Advisory: .NET 5.0 security and bugfix update Red Hat Security Advisories (RHSA) · Oct 8, 2026
- RHSA-2021:2351 Red Hat Security Advisory: .NET 5.0 on RHEL 7 security and bugfix update Red Hat Security Advisories (RHSA) · Oct 8, 2026
- RHSA-2021:2350 Red Hat Security Advisory: .NET Core 3.1 on RHEL 7 security and bugfix update Red Hat Security Advisories (RHSA) · Oct 8, 2026
- ELSA-2021-2352 Important: .NET Core 3.1 security and bugfix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 11, 2021
- ELSA-2021-2353 Important: .NET 5.0 security and bugfix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 10, 2021
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31957
- FEDORA-2021-4b3fc547fe vendor-advisory
- FEDORA-2021-cb4f3ab817 vendor-advisory
- FEDORA-2021-1e0e04958d vendor-advisory
- FEDORA-2021-e9c84e6d26 vendor-advisory