CVE-2021-1721

MEDIUM

Published 2021-02-25T23:01:26

Actions:

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CVSS Score

V3.1

6.5

/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C

Base Score Metrics

Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14

0.048

probability

of exploitation in the wild

There is a 4.8% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25

Exploit Probability

Percentile: 0.890

Higher than 89.0% of all CVEs

Attack Vector Metrics

Attack Vector

Not Available

Attack Complexity

Not Available

Privileges Required

Not Available

User Interaction

Not Available

Scope

Not Available

Impact Metrics

Confidentiality

Not Available

Integrity

Not Available

Availability

Not Available

Description

No description available

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Microsoft

Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)

Affected Versions:

16.0.0

Microsoft

PowerShell Core 7.1

Affected Versions:

7.1.0

Microsoft

PowerShell Core 7.0

Affected Versions:

7.0.0

Microsoft

.NET Core 2.1

Affected Versions:

2.1

Microsoft

.NET Core 3.1

Affected Versions:

3.1

Microsoft

.NET 5.0

Affected Versions:

5.0.0

Microsoft

Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)

Affected Versions:

16.0

Microsoft

Microsoft Visual Studio 2019 version 16.8

Affected Versions:

16.0

Microsoft

Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)

Affected Versions:

15.9.0

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

Denial of service in .NET core

GHSA-3gp9-h8hw-pxpw

Advisory Details

.NET Core and Visual Studio Denial of Service Vulnerability due to a vulnerability which exists when creating HTTPS web request during X509 certificate chain building.

Affected Packages

NuGet Microsoft.NETCore.App

ECOSYSTEM: ≥2.1.0 <2.1.25

NuGet Microsoft.NETCore.App.Host.linux-arm

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Host.linux-arm64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Host.linux-musl-arm64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Host.linux-musl-x64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Host.linux-x64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Host.osx-x64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Host.rhel.6-x64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Host.win-arm

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Host.win-arm64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Host.win-x64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Host.win-x86

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Runtime.linux-arm

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Runtime.linux-arm64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Runtime.linux-musl-arm64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Runtime.linux-musl-x64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Runtime.linux-x64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Runtime.osx-x64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Runtime.rhel.6-x64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Runtime.win-arm

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Runtime.win-arm64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Runtime.win-x64

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Runtime.win-x86

ECOSYSTEM: ≥3.1.0 <3.1.12

NuGet Microsoft.NETCore.App.Runtime.Mono.LLVM.AOT.linux-arm64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.Mono.LLVM.AOT.linux-x64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.Mono.LLVM.AOT.osx-x64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.Mono.LLVM.linux-arm64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.Mono.LLVM.linux-x64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.Mono.LLVM.osx-x64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.Mono.linux-arm

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.Mono.linux-arm64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.Mono.linux-musl-x64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.Mono.linux-x64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.Mono.osx-x64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.android-arm

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.android-arm64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.android-x64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.android-x86

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.browser-wasm

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.ios-arm

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.ios-x64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.ios-x86

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.linux-arm

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.linux-arm64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.linux-musl-arm

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.linux-musl-arm64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.linux-musl-x64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.linux-x64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.osx-x64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.tvos-arm64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.tvos-x64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.win-arm

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.win-arm64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.win-x64

ECOSYSTEM: ≥5.0.0 <5.0.3

NuGet Microsoft.NETCore.App.Runtime.win-x86

ECOSYSTEM: ≥5.0.0 <5.0.3

CVSS Scoring

CVSS Score

5.0

CVSS Vector


                                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-1721

WEB https://github.com/dotnet/announcements/issues/175

WEB https://github.com/dotnet/runtime/issues/48067

WEB https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1721

Advisory provided by GitHub Security Advisory Database. Published: May 24, 2022, Modified: November 1, 2022

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1721

Published: 2021-02-25T23:01:26

Last Modified: 2024-08-03T16:18:11.551Z

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CVE-2021-1721

Expert Analysis

CVSS Score

EPSS Score

Attack Vector Metrics

Impact Metrics

Description

Available Exploits

Related News

Affected Products

Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)

Affected Versions:

PowerShell Core 7.1

Affected Versions:

PowerShell Core 7.0

Affected Versions:

.NET Core 2.1

Affected Versions:

.NET Core 3.1

Affected Versions:

.NET 5.0

Affected Versions:

Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)

Affected Versions:

Microsoft Visual Studio 2019 version 16.8

Affected Versions:

Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)

Affected Versions:

GitHub Security Advisories

Denial of service in .NET core

Advisory Details

Affected Packages

CVSS Scoring

CVSS Score

CVSS Vector

References

References

Request Analysis

What to expect

Request Received!