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Ubuntu Security Notice USN-7105-1

Ubuntu Security Notice 7105-1 - It was discovered that the NrbfDecoder component in .NET did not properly handle an instance of a type confusion vulnerability. An authenticated attacker could possibly use this issue to gain the privileges of another user and execute arbitrary code. It was discovered that the NrbfDecoder component in .NET did not properly perform input validation. An unauthenticated remote attacker could possibly use this issue to cause a denial of service.

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Ubuntu Security Notice USN-7105-1
November 12, 2024

dotnet9 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 24.10

Summary:

Several security issues were fixed in .NET.

Software Description:

  • dotnet9: .NET CLI tools and runtime

Details:

It was discovered that the NrbfDecoder component in .NET did not properly
handle an instance of a type confusion vulnerability. An authenticated
attacker could possibly use this issue to gain the privileges of another
user and execute arbitrary code. (CVE-2024-43498)

It was discovered that the NrbfDecoder component in .NET did not properly
perform input validation. An unauthenticated remote attacker could possibly
use this issue to cause a denial of service. (CVE-2024-43499)

Update instructions:

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

Ubuntu 24.10
aspnetcore-runtime-9.0 9.0.0-rtm-0ubuntu1~24.10.1
dotnet-host-9.0 9.0.0-rtm-0ubuntu1~24.10.1
dotnet-hostfxr-9.0 9.0.0-rtm-0ubuntu1~24.10.1
dotnet-runtime-9.0 9.0.0-rtm-0ubuntu1~24.10.1
dotnet-sdk-9.0 9.0.100-rtm-0ubuntu1~24.10.1
dotnet-sdk-aot-9.0 9.0.100-rtm-0ubuntu1~24.10.1
dotnet9 9.0.100-9.0.0-0ubuntu1~24.10.1

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

References:
https://ubuntu.com/security/notices/USN-7105-1
CVE-2024-43498, CVE-2024-43499

Package Information:
https://launchpad.net/ubuntu/+source/dotnet9/9.0.100-9.0.0-0ubuntu1~24.10.1

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