CVE-2020-1161: ASP.NET Core Denial of Service Vulnerability in Microsoft.AspNetCore.App.Runtime
Summary
CVE-2020-1161: ASP.NET Core Denial of Service Vulnerability. Affects Microsoft.AspNetCore.App.Runtime.linux-arm versions >= 3.1.0, < 3.1.4. Fixed in 3.1.4. How to fix ↓
Also tracked for
- aspnet-core · Bitnami
The same CVE-2020-1161 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
Microsoft.AspNetCore.App.Runtime is a NuGet package that provides the runtime components for ASP.NET Core applications. It is used to build and run web applications on various platforms, including Linux, macOS, and Windows. The package includes essential libraries and dependencies for ASP.NET Core development. However, a vulnerability has been discovered in this package that can lead to a denial of service (DoS) attack.
Vulnerability Detail
The ASP.NET Core Denial of Service Vulnerability (CVE-2020-1161) arises from a flaw in the way ASP.NET Core handles web requests. This vulnerability allows an attacker to send specially crafted requests that can cause the application to consume excessive resources, leading to a DoS condition. The impact of this vulnerability can range from degraded performance to complete unavailability of the affected ASP.NET Core application. The vulnerability has a CVSS score of 7.5, indicating a high severity level.
How To Fix
Latest published version: 10.0.13 as of 23 Oct 2026
Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
3.1.4
This is the first release that contains the fix.
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Workaround
As a workaround, developers can implement rate limiting or request throttling mechanisms to mitigate the impact of potential DoS attacks. By limiting the number of requests allowed per second or per minute, the application can prevent excessive resource consumption. Implementing such mechanisms can help mitigate the risk until the package is updated to the fixed version.
Conclusion
The ASP.NET Core Denial of Service Vulnerability in Microsoft.AspNetCore.App.Runtime is a critical issue that can lead to a DoS condition in ASP.NET Core applications. It is crucial to update the affected package to the fixed version and implement appropriate mitigations to protect the application from potential attacks. For further support and guidance on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The vulnerability can lead to a DoS condition, causing degraded performance or complete unavailability of the affected ASP.NET Core application.
Update the Microsoft.AspNetCore.App.Runtime package to version 3.1.4 or later.
Implement rate limiting or request throttling mechanisms to mitigate the impact of potential DoS attacks.
The vulnerability has a CVSS score of 7.5, indicating a high severity level.
For more information, you can visit the Vulert Playground (https://vulert.com/scanner) to check if your application is affected and access additional details.
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