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Red Hat Enterprise Linux 8: RHSA-2021-0095 Important: Krestel Deadlock

red hat
Calendar Grey January 13, 2021
Dist Redhat Esm H88
Essential security patch and bug resolution update for .NET Core 3.1 on Red Hat Enterprise Linux tackling significant vulnerabilities.
An update for .NET Core 3.1 is now available for Red Hat Enterprise Linux 8

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

Summary

.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.

Topics%20covered

Topics Covered

security advisory security issue Red Hat bug fix important deadlock dotnet ASP.NET Core Krestel deadlock

References

https://access.redhat.com/security/cve/CVE-2021-1723 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: dotnet3.1-3.1.111-1.el8_3.src.rpm
x86_64: aspnetcore-runtime-3.1-3.1.11-1.el8_3.x86_64.rpm aspnetcore-targeting-pack-3.1-3.1.11-1.el8_3.x86_64.rpm dotnet-apphost-pack-3.1-3.1.11-1.el8_3.x86_64.rpm dotnet-apphost-pack-3.1-debuginfo-3.1.11-1.el8_3.x86_64.rpm dotnet-hostfxr-3.1-3.1.11-1.el8_3.x86_64.rpm dotnet-hostfxr-3.1-debuginfo-3.1.11-1.el8_3.x86_64.rpm dotnet-runtime-3.1-3.1.11-1.el8_3.x86_64.rpm dotnet-runtime-3.1-debuginfo-3.1.11-1.el8_3.x86_64.rpm dotnet-sdk-3.1-3.1.111-1.el8_3.x86_64.rpm dotnet-sdk-3.1-debuginfo-3.1.111-1.el8_3.x86_64.rpm dotnet-targeting-pack-3.1-3.1.11-1.el8_3.x86_64.rpm dotnet-templates-3.1-3.1.111-1.el8_3.x86_64.rpm dotnet3.1-debuginfo-3.1.111-1.el8_3.x86_64.rpm dotnet3.1-debugsource-3.1.111-1.el8_3.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:0095-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0095
Issue date: 2021-01-13

Topic

An update for .NET Core 3.1 is now available for Red Hat Enterprise Linux8.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security issue Red Hat bug fix important deadlock dotnet ASP.NET Core Krestel deadlock

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - x86_64

Bugs Fixed

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

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