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Ubuntu Security Notice USN-6278-2

Ubuntu Security Notice USN-6278-2
Posted Aug 11, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6278-2 - USN-6278-1 fixed several vulnerabilities in .NET. This update provides the corresponding updates for Ubuntu 22.04 LTS. 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.

tags | advisory, remote, vulnerability, code execution
systems | linux, ubuntu
advisories | CVE-2023-35390, CVE-2023-38178, CVE-2023-38180
SHA-256 | bbe5ad0ccef22ad3d5b80f2a669f69b1767e2bc58e7c496afd4da28a17cdf5c5

Ubuntu Security Notice USN-6278-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-6278-2
August 10, 2023

dotnet6, dotnet7 vulnerabilities
==========================================================================

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

- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in .NET.

Software Description:
- 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)

Update instructions:

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

Ubuntu 22.04 LTS:
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

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

References:
https://ubuntu.com/security/notices/USN-6278-2
https://ubuntu.com/security/notices/USN-6278-1
CVE-2023-35390, CVE-2023-38178, CVE-2023-38180

Package Information:
https://launchpad.net/ubuntu/+source/dotnet6/6.0.121-0ubuntu1~22.04.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.110-0ubuntu1~22.04.1

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