CVE-2023-21538: .NET Denial of Service Vulnerability

Overview

Severity

High (CVSS 7.5)

CVSS Vector

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

Category

Denial of Service

Exploit Status

Not Exploited

Patch Tuesday

2023-Jan

Released

2023-01-10

Last Updated

2023-01-25

EPSS Score

0.85% (percentile: 74.9%)

Affected Products (2)

Developer Tools

• .NET 6.0
• PowerShell 7.2

Security Updates (2)

• 5022546
• Release Notes

Acknowledgments

<a href="https://www.linkedin.com/in/jgorter/">Johan Gorter</a> with <a href="https://www.afas.nl/">AFAS Software</a>

Revision History

• 2023-01-10: Information published.
• 2023-01-25: Revised the Security Updates table to include PowerShell 7.2 because this version of PowerShell 7 is affected by this vulnerability. See https://github.com/PowerShell/Announcements/issues/36 for more information.