CVE-2023-21808
HIGH
Published 2023-02-14T20:09:27.030Z
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CVSS Score
V3.1
7.8
/10
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Base Score Metrics
Exploitability: N/A
Impact: N/A
EPSS Score
v2023.03.01
0.003
probability
of exploitation in the wild
There is a 0.3% chance that this vulnerability will be exploited in the wild within the next 30 days.
Updated: 2025-01-25
Exploit Probability
Percentile: 0.687
Higher than 68.7% of all CVEs
Attack Vector Metrics
Impact Metrics
Description
No description available
Available Exploits
No exploits available for this CVE.
Related News
No news articles found for this CVE.
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GitHub Security Advisories
Community-driven vulnerability intelligence from GitHub
Advisory Details
# Microsoft Security Advisory CVE-2023-21808: .NET Remote Code Execution Vulnerability
## <a name="executive-summary"></a>Executive summary
Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 7.0 and .NET 6.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
A vulnerability exists in how .NET reads debugging symbols, where reading a malicious symbols file may result in remote code execution.
## Discussion
Discussion for this issue can be found at https://github.com/dotnet/runtime/issues/82112
### <a name="mitigation-factors"></a>Mitigation factors
Microsoft has not identified any mitigating factors for this vulnerability.
## <a name="affected-software"></a>Affected software
* Any .NET 7.0 application running on .NET 7.0.2 or earlier.
* Any .NET 6.0 application running on .NET 6.0.13 or earlier.
If your application uses the following package versions, ensure you update to the latest version of .NET.
### <a name=".NET 7"></a>.NET 7
Package name | Affected version | Patched version
------------ | ---------------- | -------------------------
[Microsoft.NetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm)|>= 7.0.0, <= 7.0.2|7.0.3
[Microsoft.NetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm64)|>= 7.0.0, <= 7.0.2|7.0.3
[Microsoft.NetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x64)|>= 7.0.0, <= 7.0.2|7.0.3
[Microsoft.NetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x86)|>= 7.0.0, <= 7.0.2|7.0.3
### <a name=".NET 6"></a>.NET 6
Package name | Affected version | Patched version
------------ | ---------------- | -------------------------
[Microsoft.NetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm)|>= 6.0.0, <= 6.0.13|6.0.14
[Microsoft.NetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm64)|>= 6.0.0, <= 6.0.13|6.0.14
[Microsoft.NetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x64)|>= 6.0.0, <= 6.0.13|6.0.14
[Microsoft.NetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x86)|>= 6.0.0, <= 6.0.13|6.0.14
## Advisory FAQ
### <a name="how-affected"></a>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](#affected-software), you're exposed to the vulnerability.
### <a name="how-fix"></a>How do I fix the issue?
* To fix the issue please install the latest version of .NET 6.0 or .NET 7.0. 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 Core 3.1 or greater installed, you can list the versions you have installed by running the `dotnet --info` command. You will see output like the following;
* If you are using one of the affected packages, please update to the patched version listed above.
```
.NET Core SDK (reflecting any global.json):
Version: 6.0.300
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: 6.0.5
Commit: 8473146e7d
.NET Core SDKs installed:
6.0.300 [C:\Program Files\dotnet\sdk]
.NET Core runtimes installed:
Microsoft.AspNetCore.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 6.0.5 [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 7.0, you should download and install Runtime 7.0.3 or SDK 7.0.103 (for Visual Studio 2022 v17.4) from https://dotnet.microsoft.com/download/dotnet-core/7.0.
* If you're using .NET 6.0, you should download and install Runtime 6.0.14 or SDK 6.0.114 (for Visual Studio 2022 v17.1) from https://dotnet.microsoft.com/download/dotnet-core/6.0.
.NET 6.0 and and .NET 7.0 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](https://docs.microsoft.com/dotnet/core/deploying/#self-contained-deployments-scd) 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 6.0 or .NET 7.0, please email details to [email protected]. 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.
### Acknowledgements
[Johan Gorter](https://www.linkedin.com/in/jgorter/) with [AFAS Software](https://www.afas.nl/)
### External Links
[CVE-2023-21808]( https://www.cve.org/CVERecord?id=CVE-2023-21808)
### Revisions
V1.0 (February 14, 2023): Advisory published.
_Version 1.0_
_Last Updated 2023-02-14_
Affected Packages
NuGet
Microsoft.NetCore.App.Runtime.win-arm
ECOSYSTEM:
≥7.0.0
<7.0.3
NuGet
Microsoft.NetCore.App.Runtime.win-arm
ECOSYSTEM:
≥6.0.0
<6.0.14
NuGet
Microsoft.NetCore.App.Runtime.win-arm64
ECOSYSTEM:
≥7.0.0
<7.0.3
NuGet
Microsoft.NetCore.App.Runtime.win-arm64
ECOSYSTEM:
≥6.0.0
<6.0.14
NuGet
Microsoft.NetCore.App.Runtime.win-x64
ECOSYSTEM:
≥7.0.0
<7.0.3
NuGet
Microsoft.NetCore.App.Runtime.win-x64
ECOSYSTEM:
≥6.0.0
<6.0.14
NuGet
Microsoft.NetCore.App.Runtime.win-x86
ECOSYSTEM:
≥7.0.0
<7.0.3
NuGet
Microsoft.NetCore.App.Runtime.win-x86
ECOSYSTEM:
≥6.0.0
<6.0.14
CVSS Scoring
CVSS Score
7.5
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
Advisory provided by GitHub Security Advisory Database. Published: February 14, 2023, Modified: February 14, 2023
Published: 2023-02-14T20:09:27.030Z
Last Modified: 2025-02-28T21:13:45.998Z
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