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USN-7058-1: .NET vulnerabilities

8 October 2024

Several security issues were fixed in dotnet6, dotnet8.

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Releases

Packages

  • dotnet6 - .NET CLI tools and runtime
  • dotnet8 - .NET CLI tools and runtime

Details

Brennan Conroy discovered that the .NET Kestrel web server did not
properly handle closing HTTP/3 streams under certain circumstances. An
attacker could possibly use this issue to achieve remote code execution.
This vulnerability only impacted .NET8. (CVE-2024-38229)

It was discovered that .NET components designed to process malicious input
were susceptible to hash flooding attacks. An attacker could possibly use
this issue to cause a denial of service, resulting in a crash.
(CVE-2024-43483)

It was discovered that the .NET System.IO.Packaging namespace did not
properly process SortedList data structures. An attacker could possibly
use this issue to cause a denial of service, resulting in a crash.
(CVE-2024-43484)

It was discovered that .NET did not properly handle the deserialization of
of certain JSON properties. An attacker could possibly use this issue to
cause a denial of service, resulting in a crash. (CVE-2024-43485)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 24.04
Ubuntu 22.04

In general, a standard system update will make all the necessary changes.

References

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Further reading