CVE-2023-29337 is a high-severity (CVSS 7.1) CWE-367 vulnerability in Microsoft.Build.NuGetSdkResolver. A fix is available for Microsoft.Build.NuGetSdkResolver — see the affected versions and patch details below.
NuGet Client Remote Code Execution Vulnerability
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2023-29337.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
Microsoft.Build.NuGetSdkResolver.NETNuGet.PackageManagement.NETNuGet.PackageManagement.NETNuGet.PackageManagement.NETNuGet.PackageManagement.NETNuGet.PackageManagement.NETNuGet.PackageManagement.NETMicrosoft.Build.NuGetSdkResolver+30 moreReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.
Description
Description
Microsoft is releasing this security advisory to provide information about a vulnerability in .NET and NuGet on Linux. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
A vulnerability exists in .NET 6.0, .NET 7.0 and NuGet(nuget.exe, NuGet.Protocol, NuGet.Common, NuGet.CommandLine, NuGet.Commands, Microsoft.Build.NuGetSdkResolver, NuGet.PackageManagement) where a potential race condition that can lead to a symlink attack on Linux. Non-Linux platforms are not affected.
Affected software
This issue only affects Linux systems.
NuGet & NuGet Packages
- Any NuGet.exe, NuGet.Protocol, NuGet.Common, NuGet.CommandLine, NuGet.Commands, Microsoft.Build.NuGetSdkResolver, NuGet.PackageManagement 6.6.0 version or earlier.
- Any NuGet.exe, NuGet.Protocol, NuGet.Common, NuGet.CommandLine, NuGet.Commands, Microsoft.Build.NuGetSdkResolver, NuGet.PackageManagement 6.5.0 version or earlier.
- Any NuGet.exe, NuGet.Protocol, NuGet.Common, NuGet.CommandLine, NuGet.Commands, Microsoft.Build.NuGetSdkResolver, NuGet.PackageManagement 6.4.1 version or earlier.
- Any NuGet.exe, NuGet.Protocol, NuGet.Common, NuGet.CommandLine, NuGet.Commands, Microsoft.Build.NuGetSdkResolver, NuGet.PackageManagement 6.3.2 version or earlier.
- Any NuGet.exe, NuGet.Protocol, NuGet.Common, NuGet.CommandLine, NuGet.Commands, Microsoft.Build.NuGetSdkResolver, NuGet.PackageManagement 6.2.3 version or earlier.
- Any NuGet.exe, NuGet.Protocol, NuGet.Common, NuGet.CommandLine, NuGet.Commands, Microsoft.Build.NuGetSdkResolver, NuGet.PackageManagement 6.0.4 version or earlier.
- Any NuGet.exe, NuGet.Protocol, NuGet.Common, NuGet.CommandLine, NuGet.Commands, Microsoft.Build.NuGetSdkResolver, NuGet.PackageManagement 5.11.4
.NET SDK(s)
- Any .NET SDK 7.0.106 or earlier, or 7.0.303 or earlier
- Any .NET SDK 6.0.117 or earlier, or 6.0.312 or earlier, or 6.0.409 or earlier.
Patches
To fix the issue, please install the latest version of .NET 6.0 or .NET 7.0 and NuGet (NuGet.exe, NuGet.Protocol, NuGet.Common, NuGet.CommandLine, NuGet.Commands, NuGet.PackageManagement versions). 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.
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If you're using NuGet.exe 6.6.0 or lower, you should download and install 6.6.1 from https://dist.nuget.org/win-x86-commandline/v6.6.1/nuget.exe.
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If you're using NuGet.exe 6.5.0 or lower, you should download and install 6.5.1 from https://dist.nuget.org/win-x86-commandline/v6.5.1/nuget.exe.
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If you're using NuGet.exe 6.4.1 or lower, you should download and install 6.4.2 from https://dist.nuget.org/win-x86-commandline/v6.4.2/nuget.exe.
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If you're using NuGet.exe 6.3.2 or lower, you should download and install 6.3.3 from https://dist.nuget.org/win-x86-commandline/v6.3.3/nuget.exe.
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If you're using NuGet.exe 6.2.3 or lower, you should download and install 6.2.4 from https://dist.nuget.org/win-x86-commandline/v6.2.4/nuget.exe.
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If you're using NuGet.exe 6.0.4 or lower, you should download and install 6.0.5 from https://dist.nuget.org/win-x86-commandline/v6.0.5/nuget.exe.
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If you're using NuGet.exe 5.11.4 or lower, you should download and install 5.11.5 from https://dist.nuget.org/win-x86-commandline/v5.11.5/nuget.exe.
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If you're using .NET 7.0, you should download and install Runtime 7.0.7 or SDK 7.0.107 or SDK 7.0.304 from https://dotnet.microsoft.com/download/dotnet-core/7.0.
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If you're using .NET 7.0, you should download and install Runtime 7.0.7 or SDK 7.0.107 or SDK 7.0.304 from https://dotnet.microsoft.com/download/dotnet-core/7.0.
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If you're using .NET 6.0, you should download and install Runtime 6.0.18 or SDK 6.0.118 or SDK 6.0.312 from https://dotnet.microsoft.com/download/dotnet-core/6.0.
Other details
Announcement for this issue can be found at https://github.com/NuGet/Announcements/issues/69
MSRC details for this can be found at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-29337
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| .NETNuGet | Microsoft.Build.NuGetSdkResolver | all versions | No fix |
| .NETNuGet | NuGet.PackageManagement | ≥ 6.0.0&&< 6.0.5 | 6.0.5dotnet add package NuGet.PackageManagement --version 6.0.5 |
| .NETNuGet | NuGet.PackageManagement | ≥ 6.2.0&&< 6.2.4 | 6.2.4dotnet add package NuGet.PackageManagement --version 6.2.4 |
| .NETNuGet | NuGet.PackageManagement | ≥ 6.3.0&&< 6.3.3 | 6.3.3dotnet add package NuGet.PackageManagement --version 6.3.3 |
| .NETNuGet | NuGet.PackageManagement | ≥ 6.4.0&&< 6.4.2 | 6.4.2dotnet add package NuGet.PackageManagement --version 6.4.2 |
| .NETNuGet | NuGet.PackageManagement | ≥ 6.5.0&&< 6.5.1 | 6.5.1dotnet add package NuGet.PackageManagement --version 6.5.1 |
Affected Products
nugetmicrosoftDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Microsoft.Build.NuGetSdkResolver, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
A fix is available for CVE-2023-29337; check the affected-versions list above or the advisory for the patched release of Microsoft.Build.NuGetSdkResolver, then make sure no transitive dependency still pins the vulnerable range.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
| Product | Fixed in | Advisory |
|---|---|---|
| .NET Core on Red Hat Enterprise Linux | rh-dotnet60-dotnet-0:6.0.118-1.el7_9 | RHSA-2023:3580 |
| Red Hat Enterprise Linux 8 | dotnet6.0-0:6.0.118-1.el8_8 | RHSA-2023:3582 |
| Red Hat Enterprise Linux 8 | dotnet7.0-0:7.0.107-1.el8_8 | RHSA-2023:3593 |
| Red Hat Enterprise Linux 8.6 Extended Update Support | dotnet6.0-0:6.0.120-1.el8_6 | RHSA-2023:4448 |
| Red Hat Enterprise Linux 9 | dotnet6.0-0:6.0.118-1.el9_2 | RHSA-2023:3581 |
| Red Hat Enterprise Linux 9 | dotnet7.0-0:7.0.107-1.el9_2 | RHSA-2023:3592 |
| Red Hat Enterprise Linux 9.0 Extended Update Support | dotnet6.0-0:6.0.120-1.el9_0 | RHSA-2023:4449 |
Frequently Asked Questions
Is CVE-2023-29337 in your dependencies?
Find it across NuGet, including transitive dependencies.