.NET Core and Visual Studio Denial of Service Vulnerability

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2021-26423
StatePUBLISHED
Assignermicrosoft
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-08-12 18:15:08 UTC
Updated2026-08-10 16:17:31 UTC
Description.NET Core and Visual Studio Denial of Service Vulnerability

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

Problem Types: NVD-CWE-noinfo | Denial of Service | CWE-noinfo Not enough information

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
2.0[email protected]Primary5AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:N/AC:L/Au:N/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Microsoft .net All All All All
Application Microsoft .net Core All All All All
Application Microsoft .net Core All All All All
Application Microsoft Powershell Core All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Microsoft .NET 5.0 affected 5.0.0 5.0.9 custom Not specified
CNA Microsoft .NET Core 2.1 affected 2.1 2.1.30 custom Not specified
CNA Microsoft .NET Core 3.1 affected 3.1 3.1.18 custom Not specified
CNA Microsoft Microsoft Visual Studio 2017 Version 15.9 Includes 15.0 - 15.8 affected 15.9.0 15.9.38 custom Not specified
CNA Microsoft Microsoft Visual Studio 2019 Version 16.10 Includes 16.0 - 16.9 affected 16.10.0 16.10.5 custom Not specified
CNA Microsoft Microsoft Visual Studio 2019 Version 16.4 Includes 16.0 - 16.3 affected 16.0 16.4.25 custom Not specified
CNA Microsoft Microsoft Visual Studio 2019 Version 16.7 Includes 16.0 16.6 affected 16.0.0 16.7.18 custom Not specified
CNA Microsoft Microsoft Visual Studio 2019 Version 16.9 Includes 16.0 - 16.8 affected 15.0.0 16.9.10 custom Not specified
CNA Microsoft PowerShell Core 7.0 affected 7.0.0 7.0.7 custom Not specified
CNA Microsoft PowerShell Core 7.1 affected 7.1.0 7.1.4 custom Not specified
CNA Microsoft Visual Studio 2019 For Mac Version 8.10 affected 8.1.0 8.10.7 custom Not specified

References

ReferenceSourceLinkTags
Security Update Guide - Microsoft Security Response Center af854a3a-2127-422b-91ae-364da2661108 portal.msrc.microsoft.com Patch, Vendor Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26423 [email protected] msrc.microsoft.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159350 Oracle Enterprise Linux Security Update for .NET Core 3.1 (ELSA-2021-3142)
  • 159352 Oracle Enterprise Linux Security Update for .NET 5.0 (ELSA-2021-3148)
  • 239550 Red Hat Update for .NET 5.0 (RHSA-2021:3148)
  • 239551 Red Hat Update for .NET 5.0 on RHEL 7 (RHSA-2021:3147)
  • 239553 Red Hat Update for .NET Core 3.1 on RHEL 7 (RHSA-2021:3143)
  • 239554 Red Hat Update for .NET Core 3.1 (RHSA-2021:3142)
  • 375799 PowerShell Core Multiple .NET Vulnerabilities
  • 377162 Alibaba Cloud Linux Security Update for .net core 3.1 (ALINUX3-SA-2021:0062)
  • 900309 CBL-Mariner Linux Security Update for aspnetcore-runtime-3.1 3.1.15
  • 91807 Microsoft .NET Core and ASP.NET Core Security Update for August 2021
  • 91809 Microsoft Visual Studio Security Update for August 2021
  • 940040 AlmaLinux Security Update for .NET (ALSA-2021:3148)
  • 940107 AlmaLinux Security Update for .NET (ALSA-2021:3142)
  • 960025 Rocky Linux Security Update for .NET (RLSA-2021:3142)
  • 960028 Rocky Linux Security Update for .NET (RLSA-2021:3148)

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