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Red Hat 8: RHSA-2021-3148-01 Critical: .NET 5.0 DoS and Security Issues

red hat
Calendar Grey August 12, 2021
Dist Redhat Esm H88
Crucial patch for vulnerabilities and enhancements released for .NET 5.0 on Red Hat Enterprise Linux 8. Fortify your infrastructure immediately!
An update for .NET 5.0 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 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 security vulnerabilities are now available. The updated versions are .NET SDK 5.0.206 and .NET Runtime 5.0.9.
Security Fix(es):
* dotnet: ASP.NET Core WebSocket frame processing DoS (CVE-2021-26423)
* dotnet: Dump file created world-readable (CVE-2021-34485)
* dotnet: ASP.NET Core JWT token logging (CVE-2021-34532)
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 update Red Hat DoS important dotnet ASP.NET

References

https://access.redhat.com/security/cve/CVE-2021-26423 https://access.redhat.com/security/cve/CVE-2021-34485 https://access.redhat.com/security/cve/CVE-2021-34532 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: dotnet5.0-5.0.206-1.el8_4.src.rpm
x86_64: aspnetcore-runtime-5.0-5.0.9-1.el8_4.x86_64.rpm aspnetcore-targeting-pack-5.0-5.0.9-1.el8_4.x86_64.rpm dotnet-5.0.206-1.el8_4.x86_64.rpm dotnet-apphost-pack-5.0-5.0.9-1.el8_4.x86_64.rpm dotnet-apphost-pack-5.0-debuginfo-5.0.9-1.el8_4.x86_64.rpm dotnet-host-5.0.9-1.el8_4.x86_64.rpm dotnet-host-debuginfo-5.0.9-1.el8_4.x86_64.rpm dotnet-hostfxr-5.0-5.0.9-1.el8_4.x86_64.rpm dotnet-hostfxr-5.0-debuginfo-5.0.9-1.el8_4.x86_64.rpm dotnet-runtime-5.0-5.0.9-1.el8_4.x86_64.rpm dotnet-runtime-5.0-debuginfo-5.0.9-1.el8_4.x86_64.rpm dotnet-sdk-5.0-5.0.206-1.el8_4.x86_64.rpm dotnet-sdk-5.0-debuginfo-5.0.206-1.el8_4.x86_64.rpm dotnet-targeting-pack-5.0-5.0.9-1.el8_4.x86_64.rpm dotnet-templates-5.0-5.0.206-1.el8_4.x86_64.rpm dotnet5.0-debuginfo-5.0.206-1.el8_4.x86_64.rpm dotnet5.0-debugsource-5.0.206-1.el8_4.x86_64.rpm netstandard-targeting-pack-2.1-5.0.206-1.el8_4.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-2021:3148-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3148
Issue date: 2021-08-12

Topic

An update for .NET 5.0 is now available for Red Hat Enterprise Linux 8.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 update Red Hat DoS important dotnet ASP.NET

Relevant Releases Architectures

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

Bugs Fixed

1990286 - CVE-2021-34485 dotnet: Dump file created world-readable

1990295 - CVE-2021-26423 dotnet: ASP.NET Core WebSocket frame processing DoS

1990300 - CVE-2021-34532 dotnet: ASP.NET Core JWT token logging

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