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Ubuntu Security Notice USN-6161-2

Ubuntu Security Notice 6161-2 - USN-6161-1 fixed vulnerabilities in .NET. The update introduced a regression with regards to how the runtime imported X.509 certificates. This update fixes the problem. It was discovered that .NET did not properly enforce certain restrictions when deserializing a DataSet or DataTable from XML. An attacker could possibly use this issue to elevate their privileges.

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==========================================================================
Ubuntu Security Notice USN-6161-2
June 23, 2023

dotnet6, dotnet7 regression

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

  • Ubuntu 23.04
  • Ubuntu 22.10
  • Ubuntu 22.04 LTS

Summary:

USN 6161-1 introduced a regression in .NET that could incorrectly
cause X.509 certificate imports to fail when they should succeed.

Software Description:

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

Details:

USN-6161-1 fixed vulnerabilities in .NET. The update introduced
a regression with regards to how the runtime imported X.509
certificates. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that .NET did not properly enforce certain
restrictions when deserializing a DataSet or DataTable from
XML. An attacker could possibly use this issue to elevate their
privileges. (CVE-2023-24936)

Kevin Jones discovered that .NET did not properly handle the
AIA fetching process for X.509 client certificates. An attacker
could possibly use this issue to cause a denial of service.
(CVE-2023-29331)

Kalle Niemitalo discovered that the .NET package manager,
NuGet, was susceptible to a potential race condition. An
attacker could possibly use this issue to perform remote
code execution. (CVE-2023-29337)

Tom Deseyn discovered that .NET did not properly process certain
arguments when extracting the contents of a tar file. An attacker
could possibly use this issue to elevate their privileges. This
issue only affected the dotnet7 package. (CVE-2023-32032)

It was discovered that .NET did not properly handle memory in
certain circumstances. An attacker could possibly use this issue
to cause a denial of service or perform remote code execution.
(CVE-2023-33128)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:
Ubuntu 23.04:
aspnetcore-runtime-6.0 6.0.118-0ubuntu1~23.04.1
aspnetcore-runtime-7.0 7.0.107-0ubuntu1~23.04.1
dotnet-host 6.0.118-0ubuntu1~23.04.1
dotnet-host-7.0 7.0.107-0ubuntu1~23.04.1
dotnet-hostfxr-6.0 6.0.118-0ubuntu1~23.04.1
dotnet-hostfxr-7.0 7.0.107-0ubuntu1~23.04.1
dotnet-runtime-6.0 6.0.118-0ubuntu1~23.04.1
dotnet-runtime-7.0 7.0.107-0ubuntu1~23.04.1
dotnet-sdk-6.0 6.0.118-0ubuntu1~23.04.1
dotnet-sdk-7.0 7.0.107-0ubuntu1~23.04.1
dotnet6 6.0.118-0ubuntu1~23.04.1
dotnet7 7.0.107-0ubuntu1~23.04.1

Ubuntu 22.10:
aspnetcore-runtime-6.0 6.0.118-0ubuntu1~22.10.1
aspnetcore-runtime-7.0 7.0.107-0ubuntu1~22.10.1
dotnet-host 6.0.118-0ubuntu1~22.10.1
dotnet-host-7.0 7.0.107-0ubuntu1~22.10.1
dotnet-hostfxr-6.0 6.0.118-0ubuntu1~22.10.1
dotnet-hostfxr-7.0 7.0.107-0ubuntu1~22.10.1
dotnet-runtime-6.0 6.0.118-0ubuntu1~22.10.1
dotnet-runtime-7.0 7.0.107-0ubuntu1~22.10.1
dotnet-sdk-6.0 6.0.118-0ubuntu1~22.10.1
dotnet-sdk-7.0 7.0.107-0ubuntu1~22.10.1
dotnet6 6.0.118-0ubuntu1~22.10.1
dotnet7 7.0.107-0ubuntu1~22.10.1

Ubuntu 22.04 LTS:
aspnetcore-runtime-6.0 6.0.118-0ubuntu1~22.04.1
aspnetcore-runtime-7.0 7.0.107-0ubuntu1~22.04.1
dotnet-host 6.0.118-0ubuntu1~22.04.1
dotnet-host-7.0 7.0.107-0ubuntu1~22.04.1
dotnet-hostfxr-6.0 6.0.118-0ubuntu1~22.04.1
dotnet-hostfxr-7.0 7.0.107-0ubuntu1~22.04.1
dotnet-runtime-6.0 6.0.118-0ubuntu1~22.04.1
dotnet-runtime-7.0 7.0.107-0ubuntu1~22.04.1
dotnet-sdk-6.0 6.0.118-0ubuntu1~22.04.1
dotnet-sdk-7.0 7.0.107-0ubuntu1~22.04.1
dotnet6 6.0.118-0ubuntu1~22.04.1
dotnet7 7.0.107-0ubuntu1~22.04.1

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

References:
https://ubuntu.com/security/notices/USN-6161-2
https://ubuntu.com/security/notices/USN-6161-1
https://launchpad.net/bugs/2024893, https://launchpad.net/bugs/2024894

Package Information:
https://launchpad.net/ubuntu/+source/dotnet6/6.0.119-0ubuntu1~23.04.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.108-0ubuntu1~23.04.1
https://launchpad.net/ubuntu/+source/dotnet6/6.0.119-0ubuntu1~22.10.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.108-0ubuntu1~22.10.1
https://launchpad.net/ubuntu/+source/dotnet6/6.0.119-0ubuntu1~22.04.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.108-0ubuntu1~22.04.1

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Ubuntu Security Notice USN-6161-1

Ubuntu Security Notice 6161-1 - It was discovered that .NET did not properly enforce certain restrictions when deserializing a DataSet or DataTable from XML. An attacker could possibly use this issue to elevate their privileges. Kevin Jones discovered that .NET did not properly handle the AIA fetching process for X.509 client certificates. An attacker could possibly use this issue to cause a denial of service.

Ubuntu Security Notice USN-6161-1

Ubuntu Security Notice 6161-1 - It was discovered that .NET did not properly enforce certain restrictions when deserializing a DataSet or DataTable from XML. An attacker could possibly use this issue to elevate their privileges. Kevin Jones discovered that .NET did not properly handle the AIA fetching process for X.509 client certificates. An attacker could possibly use this issue to cause a denial of service.

Ubuntu Security Notice USN-6161-1

Ubuntu Security Notice 6161-1 - It was discovered that .NET did not properly enforce certain restrictions when deserializing a DataSet or DataTable from XML. An attacker could possibly use this issue to elevate their privileges. Kevin Jones discovered that .NET did not properly handle the AIA fetching process for X.509 client certificates. An attacker could possibly use this issue to cause a denial of service.

Ubuntu Security Notice USN-6161-1

Ubuntu Security Notice 6161-1 - It was discovered that .NET did not properly enforce certain restrictions when deserializing a DataSet or DataTable from XML. An attacker could possibly use this issue to elevate their privileges. Kevin Jones discovered that .NET did not properly handle the AIA fetching process for X.509 client certificates. An attacker could possibly use this issue to cause a denial of service.

Ubuntu Security Notice USN-6161-1

Ubuntu Security Notice 6161-1 - It was discovered that .NET did not properly enforce certain restrictions when deserializing a DataSet or DataTable from XML. An attacker could possibly use this issue to elevate their privileges. Kevin Jones discovered that .NET did not properly handle the AIA fetching process for X.509 client certificates. An attacker could possibly use this issue to cause a denial of service.

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