Synopsis

Important: .NET Core 3.1 on Red Hat Enterprise Linux security and bugfix update

Type/Severity

Security Advisory: Important

Topic

An update for rh-dotnet31-dotnet is now available for .NET Core on Red Hat Enterprise Linux.

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 Core 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 Core that address a security vulnerability are now available. The updated versions are .NET Core SDK 3.1.111 and .NET Core Runtime 3.1.11.

Security Fix(es):

• dotnet: ASP.NET Core Callbacks outside of locks cause Krestel deadlock when using HTTP2 (CVE-2021-1723)

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• dotNET on RHEL (for RHEL Server) 1 x86_64
• dotNET on RHEL (for RHEL Workstation) 1 x86_64
• dotNET on RHEL (for RHEL Compute Node) 1 x86_64

Fixes

• BZ - 1914258 - CVE-2021-1723 dotnet: ASP.NET Core Callbacks outside of locks cause Krestel deadlock when using HTTP2

CVEs

• CVE-2021-1723

References