CVE-2021-1721: .NET Core and Visual Studio Denial of Service Vulnerability

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

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

Category

Denial of Service

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Publicly Disclosed

Yes

Patch Tuesday

2021-Feb

Released

2021-02-09

Last Updated

2021-02-11

EPSS Score

9.34% (percentile: 92.8%)

Affected Products (9)

Developer Tools

• Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)
• PowerShell Core 7.1
• PowerShell Core 7.0
• .NET Core 2.1
• .NET Core 3.1
• .NET 5.0
• Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)
• Microsoft Visual Studio 2019 version 16.8
• Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)

Security Updates (8)

• Release Notes
• Release Notes
• Release Notes
• Release Notes
• Release Notes
• Release Notes
• Release Notes
• Release Notes

Revision History

• 2021-02-09: Information published.
• 2021-02-11: Revised the Security Updates table to include PowerShell Core 7.0 and PowerShell Core 7.1 because these version of PowerShell Core are also affected by the vulnerability. See https://github.com/PowerShell/Announcements-Internal/issues/22 for more information.