Denial of Service (DoS) Affecting microsoft.aspnetcore.app.runtime.win-x64 package, versions [7.0.0,7.0.10)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.14% (51st percentile)

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  • Snyk IDSNYK-DOTNET-MICROSOFTASPNETCOREAPPRUNTIMEWINX64-5831252
  • published9 Aug 2023
  • disclosed8 Aug 2023
  • creditBenoit Foucher

Introduced: 8 Aug 2023

CVE-2023-38178  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade Microsoft.AspNetCore.App.Runtime.win-x64 to version 7.0.10 or higher.

Overview

Microsoft.AspNetCore.App.Runtime.win-x64 is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments.

Affected versions of this package are vulnerable to Denial of Service (DoS) in .NET Kestrel where a malicious client can bypass QUIC stream limit in HTTP/3 in both ASP.NET and .NET runtimes, resulting in exploitation of this vulnerability.

Note: .NET 6 included HTTP/3 support as a preview feature, which requires specific opt-in code. If you are using HTTP/3 in .NET 6 you must update your application to .NET 7, where the feature is supported, to fix the vulnerability. Future versions of .NET will disable the preview feature entirely.

Details

Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.

Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.

One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.

When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.

Two common types of DoS vulnerabilities:

  • High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.

  • Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm ws package

References

CVSS Scores

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