Vulnerability · Published Feb 25, 2021 · Assigned by microsoft
CVE-2021-1721.NET Core and Visual Studio Denial of Service Vulnerability
Medium 6.5
In plain English
A medium-severity security flaw in Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8) from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.3% (higher than 89% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)3.3%top 11.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
.NET Core and Visual Studio Denial of Service Vulnerability
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | microsoft.netcore.app | 2.1.25 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.host.linux-arm | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.host.linux-arm64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.host.linux-musl-arm64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.host.linux-musl-x64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.host.linux-x64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.host.osx-x64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.host.rhel.6-x64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.host.win-arm | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.host.win-arm64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.host.win-x64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.host.win-x86 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.android-arm | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.android-arm64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.android-x64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.android-x86 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.browser-wasm | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.ios-arm | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.ios-x64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.ios-x86 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.linux-arm | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.linux-arm | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.linux-arm64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.linux-arm64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.linux-musl-arm | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.linux-musl-arm64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.linux-musl-arm64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.linux-musl-x64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.linux-musl-x64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.linux-x64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.linux-x64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.mono.linux-arm | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.mono.linux-arm64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.mono.linux-musl-x64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.mono.linux-x64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.mono.llvm.aot.linux-arm64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.mono.llvm.aot.linux-x64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.mono.llvm.aot.osx-x64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.mono.llvm.linux-arm64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.mono.llvm.linux-x64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.mono.llvm.osx-x64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.mono.osx-x64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.osx-x64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.osx-x64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.rhel.6-x64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.tvos-arm64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.tvos-x64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.win-arm | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.win-arm | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.win-arm64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.win-arm64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.win-x64 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.win-x64 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.win-x86 | 5.0.3 | GHSA-3gp9-h8hw-pxpw |
| NuGet | microsoft.netcore.app.runtime.win-x86 | 3.1.12 | GHSA-3gp9-h8hw-pxpw |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6) | 16.0.0 – before publication |
| Microsoft | PowerShell Core 7.1 | 7.1.0 – before publication |
| Microsoft | PowerShell Core 7.0 | 7.0.0 – before publication |
| Microsoft | .NET Core 2.1 | 2.1 – before publication |
| Microsoft | .NET Core 3.1 | 3.1 – before publication |
| Microsoft | .NET 5.0 | 5.0.0 – before publication |
| Microsoft | Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3) | 16.0 – before publication |
| Microsoft | Microsoft Visual Studio 2019 version 16.8 | 16.0 – before publication |
| Microsoft | Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8) | 15.9.0 – before publication |