RHSA-2023:4449 — Security Advisory

Red Hat Security Advisory: .NET 6.0 security update

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Severity

Important

Red Hat Product Security

RHEL 9

Products

Official CSAF product identity

Published · August 3, 2023

Updated · June 25, 2026

Topic

An update for .NET 6.0 is now available for Red Hat Enterprise Linux 9.0 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 6.0.120 and .NET Runtime 6.0.20.

Security Fix(es):

dotnet: .NET Kestrel: Denial of Service processing X509 Certificates (CVE-2023-29331)
dotnet: vulnerability exists in NuGet where a potential race condition can lead to a symlink attack (CVE-2023-29337)
dotnet: Remote Code Execution - Source generators issue can lead to a crash due to unmanaged heap corruption (CVE-2023-33128)
dotnet: race condition in Core SignInManager<TUser> PasswordSignInAsync method (CVE-2023-33170)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.