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Red Hat Security Advisory 2021-3148-01

Red Hat Security Advisory 2021-3148-01
Posted Aug 12, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3148-01 - .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. Issues addressed include a denial of service vulnerability.

tags | advisory, denial of service, vulnerability
systems | linux, redhat
advisories | CVE-2021-26423, CVE-2021-34485, CVE-2021-34532
SHA-256 | b9e765dd4d08b602c62191da5851f18452520c92ab9a0c4dfc37d96425f38eb9

Red Hat Security Advisory 2021-3148-01

Change Mirror Download
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====================================================================
Red Hat Security Advisory

Synopsis: Important: .NET 5.0 security and bugfix update
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
CVE Names: CVE-2021-26423 CVE-2021-34485 CVE-2021-34532
====================================================================
1. Summary:

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 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.

2. Relevant releases/architectures:

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

3. Description:

.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.

4. 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

5. Bugs fixed (https://bugzilla.redhat.com/):

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

6. 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/

7. 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

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
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