dotnet7.0 Security Update: Denial of Service Vulnerabilities
Summary
ALSA-2024:0805: Important: dotnet7.0 security update. Affects aspnetcore-runtime-7.0 versions < 7.0.16-1.el9_3. Fixed in 7.0.16-1.el9_3. How to fix ↓
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Background
The dotnet7.0 package is a managed-software framework that implements a subset of the .NET framework APIs and includes a CLR implementation. It is widely used for developing and running applications on the AlmaLinux 9 operating system. However, this package is vulnerable to two denial of service (DoS) vulnerabilities, which can be exploited by attackers to disrupt the normal functioning of affected systems.
Vulnerability Detail
The first vulnerability (CVE-2024-21386) is a DoS vulnerability in the SignalR server component of dotnet7.0. An attacker can exploit this vulnerability to cause a denial of service by sending specially crafted requests to the server. The second vulnerability (CVE-2024-21404) is a DoS vulnerability in the X509Certificate2 component. By sending malicious X.509 certificates, an attacker can cause the application to consume excessive resources, leading to a denial of service.
How To Fix
Minimum fixed version
7.0.16-1.el9_3
This is the first release that contains the fix.
sudo dnf update aspnetcore-runtime-7.0Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There are no known workarounds for these vulnerabilities. It is essential to apply the security updates as soon as possible to mitigate the risk of exploitation.
Conclusion
The dotnet7.0 package is vulnerable to two denial of service (DoS) vulnerabilities. To mitigate the risk, it is crucial to update the package to the latest versions (.NET SDK 7.0.116 and .NET Runtime 7.0.16). For further support on vulnerability remediation, you can contact DevNack.com.
See every vulnerability recorded for aspnetcore-runtime-7.0 →
FAQ
dotnet7.0 is a managed-software framework that implements a subset of the .NET framework APIs and includes a CLR implementation. It is used for developing and running applications on the AlmaLinux 9 operating system.
This security update addresses two denial of service (DoS) vulnerabilities: CVE-2024-21386 in the SignalR server component and CVE-2024-21404 in the X509Certificate2 component.
An attacker can exploit the CVE-2024-21386 vulnerability by sending specially crafted requests to the SignalR server, causing a denial of service. The CVE-2024-21404 vulnerability can be exploited by sending malicious X.509 certificates, leading to resource exhaustion and a denial of service.
No, there are no known workarounds for these vulnerabilities. It is crucial to update the dotnet7.0 package to the latest version to mitigate the risk.
You can update the dotnet7.0 package by downloading and installing the latest versions (.NET SDK 7.0.116 and .NET Runtime 7.0.16) from the official AlmaLinux repository. Alternatively, you can use package management tools like yum to update the package.
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