1. Ubuntu Security Notices
  2. USN-6278-2

USN-6278-2: .NET vulnerabilities

Publication date

10 August 2023

Overview

Several security issues were fixed in .NET.

Releases

Packages

  • dotnet6 - dotNET CLI tools and runtime
  • dotnet7 - dotNET CLI tools and runtime

Details

USN-6278-1 fixed several vulnerabilities in .NET. This update
provides the corresponding updates for Ubuntu 22.04 LTS.

Original advisory details:

It was discovered that .NET did properly handle the execution of
certain commands. An attacker could possibly use this issue to
achieve remote code execution. (CVE-2023-35390)

Benoit Foucher discovered that .NET did not properly implement the
QUIC stream limit in HTTP/3. An attacker could possibly use this
issue to cause a denial of service. (CVE-2023-38178)

It was discovered that .NET did not properly handle the disconnection
of potentially malicious clients interfacing with a Kestrel server. An
attacker could possibly use this issue to cause a denial of service.
(CVE-2023-38180)

USN-6278-1 fixed several vulnerabilities in .NET. This update
provides the corresponding updates for Ubuntu 22.04 LTS.

Original advisory details:

It was discovered that .NET did properly handle the execution of
certain commands. An attacker could possibly use this issue to
achieve remote code execution. (CVE-2023-35390)

Benoit Foucher discovered that .NET did not properly implement the
QUIC stream limit in HTTP/3. An attacker could possibly use this
issue to cause a denial of service. (CVE-2023-38178)

It was discovered that .NET did not properly handle the disconnection
of potentially malicious clients interfacing with a Kestrel server. An
attacker could possibly use this issue to cause a denial of service.
(CVE-2023-38180)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
22.04 jammy aspnetcore-runtime-6.0 –  6.0.121-0ubuntu1~22.04.1
aspnetcore-runtime-7.0 –  7.0.110-0ubuntu1~22.04.1
dotnet-host –  6.0.121-0ubuntu1~22.04.1
dotnet-host-7.0 –  7.0.110-0ubuntu1~22.04.1
dotnet-hostfxr-6.0 –  6.0.121-0ubuntu1~22.04.1
dotnet-hostfxr-7.0 –  7.0.110-0ubuntu1~22.04.1
dotnet-runtime-6.0 –  6.0.121-0ubuntu1~22.04.1
dotnet-runtime-7.0 –  7.0.110-0ubuntu1~22.04.1
dotnet-sdk-6.0 –  6.0.121-0ubuntu1~22.04.1
dotnet-sdk-7.0 –  7.0.110-0ubuntu1~22.04.1
dotnet6 –  6.0.121-0ubuntu1~22.04.1
dotnet7 –  7.0.110-0ubuntu1~22.04.1

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.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›