System.Formats.Asn1

Provides classes that can read and write the ASN.1 BER, CER, and DER data formats.

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Activity

Latest release: 5d ago
Total releases: 98
Cadence: ~4 days
Last 12 months: 33

Details

License: MIT
First release: Jul 21, 2020

Releases

Version	Released
`10.0.12` patch	Sep 08, 2026
`11.0.0-rc.1.26425.128` pre	Sep 08, 2026
`9.0.20` patch	Sep 08, 2026
`10.0.11` patch	Aug 11, 2026
`9.0.19` patch	Aug 11, 2026
`11.0.0-preview.7.26381.103` pre	Aug 11, 2026
`10.0.10` patch	Jul 14, 2026
`9.0.18` patch	Jul 14, 2026
`11.0.0-preview.6.26359.118` pre	Jul 14, 2026
`10.0.9` patch	Jun 09, 2026
`9.0.17` patch	Jun 09, 2026
`11.0.0-preview.5.26302.115` pre	Jun 09, 2026
`10.0.8` patch	May 12, 2026
`9.0.16` patch	May 12, 2026
`11.0.0-preview.4.26230.115` pre	May 12, 2026
`10.0.7` patch	Apr 21, 2026
`9.0.15` patch	Apr 14, 2026
`10.0.6` patch	Apr 14, 2026
`11.0.0-preview.3.26207.106` pre	Apr 14, 2026
`10.0.5` patch	Mar 12, 2026
`11.0.0-preview.2.26159.112` pre	Mar 10, 2026
`9.0.14` patch	Mar 10, 2026
`10.0.4` patch	Mar 10, 2026
`11.0.0-preview.1.26104.118` pre	Feb 10, 2026
`9.0.13` patch	Feb 10, 2026
`10.0.3` patch	Feb 10, 2026
`10.0.2` patch	Jan 13, 2026
`9.0.12` patch	Jan 13, 2026
`10.0.1` patch	Dec 09, 2025
`10.0.0` major	Nov 11, 2025
`9.0.11` patch	Nov 11, 2025
`10.0.0-rc.2.25502.107` pre	Oct 14, 2025
`9.0.10` patch	Oct 14, 2025
`9.0.9` patch	Sep 09, 2025
`10.0.0-rc.1.25451.107` pre	Sep 09, 2025
`10.0.0-preview.7.25380.108` pre	Aug 12, 2025
`9.0.8` patch	Aug 04, 2025
`10.0.0-preview.6.25358.103` pre	Jul 15, 2025
`9.0.7` patch	Jul 08, 2025
`9.0.6` patch	Jun 10, 2025
`10.0.0-preview.5.25277.114` pre	Jun 06, 2025
`9.0.5` patch	May 13, 2025
`10.0.0-preview.4.25258.110` pre	May 12, 2025
`10.0.0-preview.3.25171.5` pre	Apr 10, 2025
`9.0.4` patch	Apr 08, 2025
`10.0.0-preview.2.25163.2` pre	Mar 18, 2025
`9.0.3` patch	Mar 11, 2025
`10.0.0-preview.1.25080.5` pre	Feb 25, 2025
`9.0.2` patch	Feb 11, 2025
`8.0.2` patch	Feb 11, 2025

1–50 of 98

Dependencies (2)

Depends on

10.0.12

Used by

866

Supply-chain exposure

866 tracked projects depend on this, <1% of every package we track.

A known CVE here directly exposes every one of them.

Known CVEs (1)

CVE-2024-38095 GHSA-447r-wph3-92pm BIT-dotnet-2024-38095 BIT-dotnet-sdk-2024-38095 Jul 09, 2024

Microsoft Security Advisory CVE-2024-38095 | .NET Denial of Service Vulnerability

High
Network Low None None

Microsoft Security Advisory CVE-2024-38095 | .NET Denial of Service Vulnerability

Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 6.0 and .NET 8.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

A Vulnerability exists when System.Formats.Asn1 in .NET parses an X.509 certificate or collection of certificates, a malicious certificate can result in excessive CPU consumption on all platforms result in Denial of Service.

Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/312

Mitigation factors

Microsoft has not identified any mitigating factors for this vulnerability.

Affected software

Any .NET 6.0 application running on .NET 6.0.31 or earlier.

Any .NET 8.0 application running on .NET 8.0.6 or earlier.

Affected Packages

The vulnerability affects any Microsoft .NET Core project if it uses any of affected packages versions listed below

.NET 6

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- Microsoft.NetCore.App.Runtime.linux-arm | >=6.0.0, <= 6.0.31 | 6.0.32 Microsoft.NetCore.App.Runtime.linux-arm64 | >=6.0.0, <= 6.0.31 | 6.0.32 Microsoft.NetCore.App.Runtime.linux-musl-arm | >=6.0.0, <= 6.0.31 | 6.0.32 Microsoft.NetCore.App.Runtime.linux-musl-arm64 | >=6.0.0, <= 6.0.31 | 6.0.32 Microsoft.NetCore.App.Runtime.linux-musl-x64 | >=6.0.0, <= 6.0.31 | 6.0.32 Microsoft.NetCore.App.Runtime.linux-x64 | >=6.0.0, <= 6.0.31 | 6.0.32 Microsoft.NetCore.App.Runtime.osx-arm64 | >=6.0.0, <= 6.0.31 | 6.0.32 Microsoft.NetCore.App.Runtime.osx-x64 | >=6.0.0, <= 6.0.31 | 6.0.32 Microsoft.NetCore.App.Runtime.win-arm | >=6.0.0, <= 6.0.31 | 6.0.32 Microsoft.NetCore.App.Runtime.win-arm64 | >=6.0.0, <= 6.0.31 | 6.0.32 Microsoft.NetCore.App.Runtime.win-x64 | >=6.0.0, <= 6.0.31 | 6.0.32 Microsoft.NetCore.App.Runtime.win-x86 | >=6.0.0, <= 6.0.31 | 6.0.32 System.Formats.Asn1 | >=5.0.0-preview.7.20364.11 | 6.0.1

.NET 8

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- Microsoft.NetCore.App.Runtime.linux-arm | >=8.0.0, <= 8.0.6 | 8.0.7 Microsoft.NetCore.App.Runtime.linux-arm64 | >=8.0.0, <= 8.0.6 | 8.0.7 Microsoft.NetCore.App.Runtime.linux-musl-arm | >=8.0.0, <= 8.0.6 | 8.0.7 Microsoft.NetCore.App.Runtime.linux-musl-arm64 | >=8.0.0, <= 8.0.6 | 8.0.7 Microsoft.NetCore.App.Runtime.linux-musl-x64 | >=8.0.0, <= 8.0.6 | 8.0.7 Microsoft.NetCore.App.Runtime.linux-x64 | >=8.0.0, <= 8.0.6 | 8.0.7 Microsoft.NetCore.App.Runtime.osx-arm64 | >=8.0.0, <= 8.0.6 | 8.0.7 Microsoft.NetCore.App.Runtime.osx-x64 | >=8.0.0, <= 8.0.6 | 8.0.7 Microsoft.NetCore.App.Runtime.win-arm | >=8.0.0, <= 8.0.6 | 8.0.7 Microsoft.NetCore.App.Runtime.win-arm64 | >=8.0.0, <= 8.0.6 | 8.0.7 Microsoft.NetCore.App.Runtime.win-x64 | >=8.0.0, <= 8.0.6 | 8.0.7 Microsoft.NetCore.App.Runtime.win-x86 | >=8.0.0, <= 8.0.6 | 8.0.7 System.Formats.Asn1 | <=6.0.0, >=7.0.0-preview.1.22076.8 | 8.0.1

Advisory FAQ

How do I know if I am affected?

If you have a runtime or SDK with a version listed, or an affected package listed in affected software or affected packages, you're exposed to the vulnerability.

How do I fix the issue?

To fix the issue please install the latest version of .NET 8.0 or .NET 7.0 or .NET 6.0. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET SDKs.

If you have .NET 6.0 or greater installed, you can list the versions you have installed by running the dotnet --info command. You will see output like the following;

.NET Core SDK (reflecting any global.json): Version: 8.0.200 Commit: 8473146e7d Runtime Environment: OS Name: Windows OS Version: 10.0.18363 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\6.0.300\ Host (useful for support): Version: 8.0.3 Commit: 8473146e7d .NET Core SDKs installed: 8.0.200 [C:\Program Files\dotnet\sdk] .NET Core runtimes installed: Microsoft.AspAspNetCore.App 8.0.3 [C:\Program Files\dotnet\shared\Microsoft.AspAspNetCore.App] Microsoft.AspNetCore.App 8.0.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.WindowsDesktop.App 8.0.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] To install additional .NET Core runtimes or SDKs: https://aka.ms/dotnet-download

If you're using .NET 8.0, you should download and install .NET 8.0.7 Runtime or .NET 8.0.107 SDK (for Visual Studio 2022 v17.8) from https://dotnet.microsoft.com/download/dotnet-core/8.0.

If you're using .NET 6.0, you should download and install Runtime 6.0.32 or SDK 6.0.132 (for Visual Studio 2022 v17.4) from https://dotnet.microsoft.com/download/dotnet-core/6.0.

.NET 6.0 and .NET 8.0 updates are also available from Microsoft Update. To access this either type "Check for updates" in your Windows search, or open Settings, choose Update & Security and then click Check for Updates.

Once you have installed the updated runtime or SDK, restart your apps for the update to take effect.

Additionally, if you've deployed self-contained applications targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.

Other Information

Reporting Security Issues

If you have found a potential security issue in .NET 8.0 or .NET 6.0, please email details to secure@microsoft.com. Reports may qualify for the Microsoft .NET Core & .NET 5 Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty.

Support

You can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime and https://github.com/dotnet/aspnet/. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.

Disclaimer

The information provided in this advisory is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

External Links

CVE-2024-38095

Revisions

V1.0 (July 09, 2024): Advisory published.

Version 1.0

Last Updated 2024-07-09

Affected versions

5.0.06.0.07.0.08.0.0

Fixed in

6.0.18.0.1

References

https://github.com/dotnet/runtime/security/advisories/GHSA-447r-wph3-92pm
https://nvd.nist.gov/vuln/detail/CVE-2024-38095
https://github.com/dotnet/runtime
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38095

Updated Sep 10, 2026 · Source: OSV.dev

Insights

Releases per month

last 12 months

Release mix

major 5
patch 35
pre 57

98 releases

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per release

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