Moderate: .NET 7.0 security update
Summary
ALSA-2023:6247: Moderate: .NET 7.0 security update. Affects aspnetcore-runtime-7.0 versions < 7.0.13-1.el8_8. Fixed in 7.0.13-1.el8_8. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The .NET framework is a managed-software framework that implements a subset of the .NET framework APIs and includes a CLR implementation. It provides a platform for developing and running applications on various operating systems. The affected package, aspnetcore-runtime-7.0, is a component of .NET that enables the execution of ASP.NET Core applications. It is vulnerable to a security issue that can lead to a denial of service when using .NET Kestrel with client certificates.
Vulnerability Detail
The vulnerability, identified as CVE-2023-36799, allows an attacker to perform a denial of service attack by exploiting a flaw in the handling of client certificates in .NET Kestrel. By sending specially crafted client certificates, an attacker can cause the Kestrel server to consume excessive resources, leading to a denial of service condition. This vulnerability has a moderate severity rating.
How To Fix
Minimum fixed version
7.0.13-1.el8_8
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 is no specific workaround mentioned for this vulnerability.
Conclusion
In conclusion, the .NET 7.0 security update addresses a moderate severity vulnerability that can lead to a denial of service when using .NET Kestrel with client certificates. It is recommended to update the affected package to the latest version to mitigate this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
See every vulnerability recorded for aspnetcore-runtime-7.0 →
FAQ
The vulnerability can be exploited by an attacker to cause a denial of service, potentially disrupting the availability of affected applications.
You can use Vulert's playground (https://vulert.com/scanner) to check if your application is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) and Vulert will analyze it for any open-source vulnerabilities, including this one.
The recommended mitigation is to update the affected package to the latest version, which includes the necessary fixes to address the vulnerability.
There is no known exploit available for this vulnerability at the time of this report.
You can refer to the CVE page for CVE-2023-36799 for more details about the vulnerability, including its impact, CVSS score, acknowledgments, and related information.
Related vulnerabilities
Recent vulnerabilities recorded for aspnetcore-runtime-7.0.
