CVE-2023-29331: .NET, .NET Framework, and Visual Studio Denial of Service Vulnerability
First published: Tue Jun 06 2023(Updated: )
.NET Kestrel: Denial of Service processing X509 Certificates When a .NET application is internet-facing and accepts an X509 client certificate for mutual TLS, a malicious client certificate can cause unbounded CPU usage.
Credit: secure@microsoft.com secure@microsoft.com secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Visual Studio 2022 | =17.6 | |
| Microsoft .NET 7.0 | ||
| Microsoft .NET 6.0 | ||
| Microsoft Visual Studio 2022 | =17.0 | |
| Microsoft Visual Studio 2022 | =17.2 | |
| nuget/Microsoft.NetCore.App.Runtime.win-x86 | >=6.0.0<=6.0.16 | 6.0.18 |
| nuget/Microsoft.NetCore.App.Runtime.win-x86 | >=7.0.0<=7.0.5 | 7.0.7 |
| nuget/Microsoft.NetCore.App.Runtime.win-x64 | >=7.0.0<=7.0.5 | 7.0.7 |
| nuget/Microsoft.NetCore.App.Runtime.win-x64 | >=6.0.0<=6.0.16 | 6.0.18 |
| nuget/Microsoft.NetCore.App.Runtime.win-arm64 | >=7.0.0<=7.0.5 | 7.0.7 |
| nuget/Microsoft.NetCore.App.Runtime.win-arm64 | >=6.0.0<=6.0.16 | 6.0.18 |
| nuget/Microsoft.NetCore.App.Runtime.win-arm | >=7.0.0<=7.0.5 | 7.0.7 |
| nuget/Microsoft.NetCore.App.Runtime.win-arm | >=6.0.0<=6.0.16 | 6.0.18 |
| nuget/Microsoft.NetCore.App.Runtime.osx-x64 | >=7.0.0<=7.0.5 | 7.0.7 |
| nuget/Microsoft.NetCore.App.Runtime.osx-x64 | >=6.0.0<=6.0.16 | 6.0.18 |
| nuget/Microsoft.NetCore.App.Runtime.osx-arm64 | >=7.0.0<=7.0.5 | 7.0.7 |
| nuget/Microsoft.NetCore.App.Runtime.osx-arm64 | >=6.0.0<=6.0.16 | 6.0.18 |
| nuget/Microsoft.NetCore.App.Runtime.linux-x64 | >=7.0.0<=7.0.5 | 7.0.7 |
| nuget/Microsoft.NetCore.App.Runtime.linux-x64 | >=6.0.0<=6.0.16 | 6.0.18 |
| nuget/Microsoft.NetCore.App.Runtime.linux-musl-x64 | >=7.0.0<=7.0.5 | 7.0.7 |
| nuget/Microsoft.NetCore.App.Runtime.linux-musl-x64 | >=6.0.0<=6.0.16 | 6.0.18 |
| nuget/Microsoft.NetCore.App.Runtime.linux-musl-arm64 | >=6.0.0<=6.0.16 | 6.0.18 |
| nuget/Microsoft.NetCore.App.Runtime.linux-musl-arm64 | >=7.0.0<=7.0.5 | 7.0.7 |
| nuget/Microsoft.NetCore.App.Runtime.linux-musl-arm | >=6.0.0<=6.0.16 | 6.0.18 |
| nuget/Microsoft.NetCore.App.Runtime.linux-musl-arm | >=7.0.0<=7.0.5 | 7.0.7 |
| nuget/Microsoft.NetCore.App.Runtime.linux-arm64 | >=7.0.0<=7.0.5 | 7.0.7 |
| nuget/Microsoft.NetCore.App.Runtime.linux-arm64 | >=6.0.0<=6.0.16 | 6.0.18 |
| nuget/Microsoft.NetCore.App.Runtime.linux-arm | >=6.0.0<=6.0.16 | 6.0.18 |
| nuget/Microsoft.NetCore.App.Runtime.linux-arm | >=7.0.0<=7.0.5 | 7.0.7 |
| nuget/System.Security.Cryptography.Pkcs | >=6.0.0<=6.0.2 | 6.0.3 |
| nuget/System.Security.Cryptography.Pkcs | >=7.0.0<=7.0.1 | 7.0.2 |
| nuget/Microsoft.Windows.Compatibility | >=6.0.0<=6.0.4 | 6.0.6 |
| nuget/Microsoft.Windows.Compatibility | >=7.0.0<=7.0.1 | 7.0.3 |
| Microsoft PowerShell Core | ||
| Microsoft PowerShell Core | ||
| All of | ||
| Any of | ||
| Microsoft Windows 10 Version 1607 x86 | ||
| Microsoft Windows 10 Version 1607 x86 | ||
| Microsoft Windows Server 2008 Itanium | =r2-sp1 | |
| Microsoft Windows Server 2012 x64 | ||
| Microsoft Windows Server 2012 x64 | =r2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft .NET Framework | =4.8 | |
| All of | ||
| Any of | ||
| Microsoft Windows Server 2008 Itanium | =r2-sp1 | |
| Microsoft Windows Server 2012 x64 | ||
| Microsoft Windows Server 2012 x64 | =r2 | |
| Any of | ||
| Microsoft .NET Framework | =4.6.2 | |
| Microsoft .NET Framework | =4.7 | |
| Microsoft .NET Framework | =4.7.1 | |
| Microsoft .NET Framework | =4.7.2 | |
| All of | ||
| Any of | ||
| Microsoft Windows Server 2008 Itanium | =sp2 | |
| Microsoft Windows Server 2008 Itanium | =sp2 | |
| Microsoft Windows Server 2012 x64 | ||
| Microsoft Windows Server 2012 x64 | =r2 | |
| Microsoft .NET Framework | =4.6.2 | |
| All of | ||
| Microsoft Windows Server 2008 Itanium | =r2-sp1 | |
| Microsoft .NET Framework | =3.5.1 | |
| All of | ||
| Any of | ||
| Microsoft Windows 10 1507 | ||
| Microsoft Windows 10 1507 | ||
| Any of | ||
| Microsoft .NET Framework | =3.5 | |
| Microsoft .NET Framework | =4.6.2 | |
| All of | ||
| Any of | ||
| Microsoft Windows 10 Version 1607 x86 | ||
| Microsoft Windows 10 Version 1607 x86 | ||
| Microsoft Windows 10 21h2 | ||
| Microsoft Windows 10 21h2 | ||
| Microsoft Windows 10 21h2 | ||
| Microsoft Windows 10 22h2 | ||
| Microsoft Windows 10 22h2 | ||
| Microsoft Windows 10 22h2 | ||
| Microsoft Windows 11 21h2 | ||
| Microsoft Windows 11 21h2 | ||
| Microsoft Windows 11 22h2 | ||
| Microsoft Windows 11 22h2 | ||
| Microsoft Windows Server 2022 | ||
| Any of | ||
| Microsoft .NET Framework | =3.5 | |
| Microsoft .NET Framework | =4.8.1 | |
| All of | ||
| Any of | ||
| Microsoft .NET Framework | =3.5 | |
| Microsoft .NET Framework | =4.8 | |
| Any of | ||
| Microsoft Windows 10 Version 1607 x86 | ||
| Microsoft Windows 10 Version 1607 x86 | ||
| Microsoft Windows 10 1809 | ||
| Microsoft Windows 10 1809 | ||
| Microsoft Windows 10 21h2 | ||
| Microsoft Windows 10 21h2 | ||
| Microsoft Windows 10 21h2 | ||
| Microsoft Windows 10 22h2 | ||
| Microsoft Windows 10 22h2 | ||
| Microsoft Windows 10 22h2 | ||
| Microsoft Windows 11 21h2 | ||
| Microsoft Windows 11 21h2 | ||
| Microsoft Windows 11 22h2 | ||
| Microsoft Windows 11 22h2 | ||
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2022 | ||
| All of | ||
| Any of | ||
| Microsoft .NET Framework | =3.5 | |
| Microsoft .NET Framework | =4.7.2 | |
| Any of | ||
| Microsoft Windows 10 1809 | ||
| Microsoft Windows 10 1809 | ||
| Microsoft Windows Server 2019 | ||
| All of | ||
| Any of | ||
| Microsoft .NET Framework | =3.5 | |
| Microsoft .NET Framework | =4.6.2 | |
| Microsoft .NET Framework | =4.7 | |
| Microsoft .NET Framework | =4.7.1 | |
| Microsoft .NET Framework | =4.7.2 | |
| Any of | ||
| Microsoft Windows 10 Version 1607 x86 | ||
| Microsoft Windows 10 Version 1607 x86 | ||
| Microsoft Windows Server 2016 | ||
| All of | ||
| Microsoft .NET Framework | =3.5 | |
| Any of | ||
| Microsoft Windows Server 2012 x64 | ||
| Microsoft Windows Server 2012 x64 | =r2 | |
| All of | ||
| Microsoft .NET Framework | =3.0-sp2 | |
| Any of | ||
| Microsoft Windows Server 2008 Itanium | =sp2 | |
| Microsoft Windows Server 2008 Itanium | =sp2 | |
| All of | ||
| Microsoft .NET Framework | =2.0-sp2 | |
| Any of | ||
| Microsoft Windows Server 2008 Itanium | =sp2 | |
| Microsoft Windows Server 2008 Itanium | =sp2 | |
| Microsoft .NET Framework | =6.0.0 | |
| Microsoft .NET Framework | =7.0.0 | |
| Microsoft .NET Framework | =3.5.1 | |
| Microsoft .NET Framework | =4.6.2 | |
| Microsoft .NET Framework | =3.0 | |
| Microsoft .NET Framework | =2.0 | |
| Microsoft .NET Framework | =4.6.2=4.7=4.7.1=4.7.2 | |
| Microsoft .NET Framework | =3.0 | |
| Microsoft .NET Framework | =2.0 | |
| Microsoft .NET Framework | =4.8 | |
| Microsoft .NET Framework | =4.8 | |
| Microsoft .NET Framework | =4.6.2=4.7=4.7.1=4.7.2 | |
| Microsoft .NET Framework | =4.8 | |
| Microsoft .NET Framework | =3.5 | |
| Microsoft .NET Framework | =4.6.2=4.7=4.7.1=4.7.2 | |
| Microsoft .NET Framework | =3.5 | |
| Microsoft .NET Framework | =3.5=4.8 | |
| Microsoft .NET Framework | =3.5=4.7.2 | |
| Microsoft .NET Framework | =4.8 | |
| Microsoft .NET Framework | =3.5=4.6.2=4.7=4.7.1=4.7.2 | |
| Microsoft .NET Framework | =3.5=4.7.2 | |
| Microsoft .NET Framework | =3.5=4.8 | |
| Microsoft .NET Framework | =3.5=4.8 | |
| Microsoft .NET Framework | =3.5=4.8 | |
| Microsoft .NET Framework | =3.5=4.8.1 | |
| Microsoft .NET Framework | =3.5=4.8.1 | |
| Microsoft .NET Framework | =3.5=4.8.1 | |
| Microsoft .NET Framework | =3.5=4.8.1 | |
| Microsoft .NET Framework | =3.5=4.8.1 | |
| Microsoft .NET Framework | =4.8 | |
| Microsoft Windows 10 Version 1607 x86 | ||
| Microsoft Windows 10 Version 1607 x86 | ||
| Microsoft Windows Server 2008 Itanium | =r2-sp1 | |
| Microsoft Windows Server 2012 x64 | ||
| Microsoft Windows Server 2012 x64 | =r2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft .NET Framework | =4.6.2 | |
| Microsoft .NET Framework | =4.7 | |
| Microsoft .NET Framework | =4.7.1 | |
| Microsoft .NET Framework | =4.7.2 | |
| Microsoft Windows Server 2008 Itanium | =sp2 | |
| Microsoft Windows Server 2008 Itanium | =sp2 | |
| Microsoft .NET Framework | =3.5.1 | |
| Microsoft .NET Framework | =3.5 | |
| Microsoft Windows 10 1507 | ||
| Microsoft Windows 10 1507 | ||
| Microsoft .NET Framework | =4.8.1 | |
| Microsoft Windows 10 21h2 | ||
| Microsoft Windows 10 21h2 | ||
| Microsoft Windows 10 21h2 | ||
| Microsoft Windows 10 22h2 | ||
| Microsoft Windows 10 22h2 | ||
| Microsoft Windows 10 22h2 | ||
| Microsoft Windows 11 21h2 | ||
| Microsoft Windows 11 21h2 | ||
| Microsoft Windows 11 22h2 | ||
| Microsoft Windows 11 22h2 | ||
| Microsoft Windows Server 2022 | ||
| Microsoft Windows 10 1809 | ||
| Microsoft Windows 10 1809 | ||
| Microsoft Windows Server 2019 | ||
| Microsoft .NET Framework | =3.0-sp2 | |
| Microsoft .NET Framework | =2.0-sp2 | |
| Microsoft .NET Framework | =3.5 |
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Reference Links
- https://github.com/dotnet/runtime/security/advisories/GHSA-555c-2p6r-68mm
- https://nvd.nist.gov/vuln/detail/CVE-2023-29331
- https://github.com/dotnet/announcements/issues/257
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-29331 (Advisory)
- https://support.microsoft.com/kb/5025823
- https://github.com/advisories/GHSA-555c-2p6r-68mm (Advisory)
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2214910
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2214912
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2214911
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2214913
- https://access.redhat.com/errata/RHSA-2023:3581
- https://access.redhat.com/errata/RHSA-2023:3582
- https://access.redhat.com/errata/RHSA-2023:3580
- https://access.redhat.com/errata/RHSA-2023:3592
- https://access.redhat.com/errata/RHSA-2023:3593
- https://access.redhat.com/security/cve/cve-2023-29331
- https://access.redhat.com/errata/RHSA-2023:4449
- https://access.redhat.com/errata/RHSA-2023:4448
- https://bugzilla.redhat.com/show_bug.cgi?id=2212617
Frequently Asked Questions
What is the severity of CVE-2023-29331?
CVE-2023-29331 has a severity rating that could lead to unbounded CPU usage due to a Denial of Service vulnerability in .NET applications using X509 certificates.
How do I fix CVE-2023-29331?
To fix CVE-2023-29331, update to the latest versions of affected products such as .NET 7.0 or .NET 6.0 following Microsoft's security guidelines.
Which software versions are affected by CVE-2023-29331?
CVE-2023-29331 affects .NET 6.0 and .NET 7.0, including various versions of Visual Studio 2022.
Can CVE-2023-29331 be exploited remotely?
Yes, CVE-2023-29331 can be exploited remotely when a malicious client presents an X509 certificate to an internet-facing .NET application.
What should developers do to mitigate CVE-2023-29331?
Developers should ensure they are implementing proper validation of client certificates and promptly apply patches or updates from Microsoft.
- collector/msrc
- agent/type
- agent/first-publish-date
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2023-29331
- agent/references
- agent/title
- agent/remedy
- agent/severity
- agent/description
- collector/msrc-cve
- source/Microsoft
- agent/software-canonical-lookup
- agent/author
- agent/weakness
- agent/event
- collector/github-advisory-latest
- source/GitHub
- alias/GHSA-555c-2p6r-68mm
- collector/github-advisory
- agent/trending
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/source
- agent/software-canonical-lookup-request
- collector/nvd-api
- source/NVD
- collector/nvd-cve
- collector/nvd-index
- agent/softwarecombine
- agent/tags
- vendor/microsoft
- canonical/microsoft visual studio 2022
- version/microsoft visual studio 2022/17.6
- version/microsoft visual studio 2022/17.4
- canonical/microsoft .net 7.0
- canonical/microsoft .net 6.0
- version/microsoft visual studio 2022/17.0
- version/microsoft visual studio 2022/17.2
- package-manager/nuget
- canonical/microsoft powershell core
- canonical/microsoft windows 10 version 1607 x86
- canonical/microsoft windows server 2008 itanium
- version/microsoft windows server 2008 itanium/r2-sp1
- canonical/microsoft windows server 2012 x64
- version/microsoft windows server 2012 x64/r2
- canonical/microsoft windows server 2016
- canonical/microsoft .net framework
- version/microsoft .net framework/4.8
- version/microsoft .net framework/4.6.2
- version/microsoft .net framework/4.7
- version/microsoft .net framework/4.7.1
- version/microsoft .net framework/4.7.2
- version/microsoft windows server 2008 itanium/sp2
- version/microsoft .net framework/3.5.1
- canonical/microsoft windows 10 1507
- version/microsoft .net framework/3.5
- canonical/microsoft windows 10 21h2
- canonical/microsoft windows 10 22h2
- canonical/microsoft windows 11 21h2
- canonical/microsoft windows 11 22h2
- canonical/microsoft windows server 2022
- version/microsoft .net framework/4.8.1
- canonical/microsoft windows 10 1809
- canonical/microsoft windows server 2019
- version/microsoft .net framework/3.0-sp2
- version/microsoft .net framework/2.0-sp2
- version/microsoft .net framework/6.0.0
- version/microsoft .net framework/7.0.0
- version/microsoft .net framework/3.0
- version/microsoft .net framework/2.0