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Red Hat: RHSA-2021-0472 Critical Update for .NET Core 3.1 Security Flaw

red hat
Calendar Grey February 10, 2021
Dist Redhat Esm H88
The recent .NET Core 3.1 patch on RHEL addresses critical vulnerabilities. Find out how to implement it today.
An update for rh-dotnet31-dotnet is now available for .NET Core on Red Hat Enterprise Linux

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 3.1.112 and .NET Core Runtime 3.1.12.
Security Fix(es):
* dotnet: certificate chain building recursion Denial of Service (CVE-2021-1721)
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 denial of service security update Red Hat red hat important software fix Denial of Service important update dotnet core .NET Core

References

https://access.redhat.com/security/cve/CVE-2021-1721 https://access.redhat.com/security/updates/classification#important

Package List

.NET Core on Red Hat Enterprise Linux ComputeNode (v. 7):
Source: rh-dotnet31-dotnet-3.1.112-1.el7_9.src.rpm
x86_64: rh-dotnet31-aspnetcore-runtime-3.1-3.1.12-1.el7_9.x86_64.rpm rh-dotnet31-aspnetcore-targeting-pack-3.1-3.1.12-1.el7_9.x86_64.rpm rh-dotnet31-dotnet-3.1.112-1.el7_9.x86_64.rpm rh-dotnet31-dotnet-apphost-pack-3.1-3.1.12-1.el7_9.x86_64.rpm rh-dotnet31-dotnet-debuginfo-3.1.112-1.el7_9.x86_64.rpm rh-dotnet31-dotnet-host-3.1.12-1.el7_9.x86_64.rpm rh-dotnet31-dotnet-hostfxr-3.1-3.1.12-1.el7_9.x86_64.rpm rh-dotnet31-dotnet-runtime-3.1-3.1.12-1.el7_9.x86_64.rpm rh-dotnet31-dotnet-sdk-3.1-3.1.112-1.el7_9.x86_64.rpm rh-dotnet31-dotnet-targeting-pack-3.1-3.1.12-1.el7_9.x86_64.rpm rh-dotnet31-dotnet-templates-3.1-3.1.112-1.el7_9.x86_64.rpm rh-dotnet31-netstandard-targeting-pack-2.1-3.1.112-1.el7_9.x86_64.rpm
.NET Core on Red Hat Enterprise Linux Server (v. 7):
Source: rh-dotnet31-dotnet-3.1.112-1.el7_9.src.rpm
x86_64: rh-dotnet31-aspnetcore-runtime-3.1-3.1.12-1.el7_9.x86_64.rpm rh-dotnet31-aspnetcore-targeting-pack-3.1-3.1.12-1.el7_9.x86_64.rpm rh-dotnet31-dotnet-3.1.112-1.el7_9.x86_64.rpm rh-dotnet31-dotnet-apphost-pack-3.1-3.1.12-1.el7_9.x86_64.rpm rh-dotnet31-dotnet-debuginfo-3.1.112-1.el7_9.x86_64.rpm rh-dotnet31-dotnet-host-3.1.12-1.el7_9.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:0472-01
Product: .NET Core on Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0472
Issue date: 2021-02-10

Topic

An update for rh-dotnet31-dotnet is now available for .NET Core on Red HatEnterprise Linux.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 denial of service security update Red Hat red hat important software fix Denial of Service important update dotnet core .NET Core

Relevant Releases Architectures

.NET Core on Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

.NET Core on Red Hat Enterprise Linux Server (v. 7) - x86_64

.NET Core on Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Bugs Fixed

1926918 - CVE-2021-1721 dotnet: certificate chain building recursion Denial of Service

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