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Red Hat 8: RHSA-2021-0471 Important: .NET Core DoS Patch

red hat
Calendar Grey February 10, 2021
Dist Redhat Esm H88
.NET Core 3.1 receives an important update for Red Hat that incorporates significant security patches targeted at resolving denial of service 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 3.1.112 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 red hat software update DoS security fix important Red Hat Enterprise dotnet

References

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

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: dotnet3.1-3.1.112-1.el8_3.src.rpm
x86_64: aspnetcore-runtime-3.1-3.1.12-1.el8_3.x86_64.rpm aspnetcore-targeting-pack-3.1-3.1.12-1.el8_3.x86_64.rpm dotnet-apphost-pack-3.1-3.1.12-1.el8_3.x86_64.rpm dotnet-apphost-pack-3.1-debuginfo-3.1.12-1.el8_3.x86_64.rpm dotnet-hostfxr-3.1-3.1.12-1.el8_3.x86_64.rpm dotnet-hostfxr-3.1-debuginfo-3.1.12-1.el8_3.x86_64.rpm dotnet-runtime-3.1-3.1.12-1.el8_3.x86_64.rpm dotnet-runtime-3.1-debuginfo-3.1.12-1.el8_3.x86_64.rpm dotnet-sdk-3.1-3.1.112-1.el8_3.x86_64.rpm dotnet-sdk-3.1-debuginfo-3.1.112-1.el8_3.x86_64.rpm dotnet-targeting-pack-3.1-3.1.12-1.el8_3.x86_64.rpm dotnet-templates-3.1-3.1.112-1.el8_3.x86_64.rpm dotnet3.1-debuginfo-3.1.112-1.el8_3.x86_64.rpm dotnet3.1-debugsource-3.1.112-1.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-2021:0471-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0471
Issue date: 2021-02-10

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 denial of service red hat software update DoS security fix important Red Hat Enterprise dotnet

Relevant Releases Architectures

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

Bugs Fixed

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

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