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Red Hat Security Advisory 2021-2351-01

Red Hat Security Advisory 2021-2351-01
Posted Jun 9, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2351-01 - .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 a security vulnerability are now available. The updated versions are .NET SDK 5.0.204 and .NET Runtime 5.0.7. Issues addressed include a denial of service vulnerability.

tags | advisory, denial of service
systems | linux, redhat
advisories | CVE-2021-31957
MD5 | 26cfeaf500c9c0a63ef6f345601f65f6

Red Hat Security Advisory 2021-2351-01

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

Synopsis: Important: .NET 5.0 on RHEL 7 security and bugfix update
Advisory ID: RHSA-2021:2351-01
Product: .NET Core on Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2351
Issue date: 2021-06-08
CVE Names: CVE-2021-31957
====================================================================
1. Summary:

An update for rh-dotnet50-dotnet is now available for .NET on Red Hat
Enterprise Linux.

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:

.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

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 a security vulnerability are now
available. The updated versions are .NET SDK 5.0.204 and .NET Runtime
5.0.7.

Security Fix(es):

* dotnet: ASP.NET Core Client Disconnect Denial of Service (CVE-2021-31957)

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/):

1966990 - CVE-2021-31957 dotnet: ASP.NET Core Client Disconnect Denial of Service

6. Package List:

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

Source:
rh-dotnet50-dotnet-5.0.204-1.el7_9.src.rpm

x86_64:
rh-dotnet50-aspnetcore-runtime-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-aspnetcore-targeting-pack-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-5.0.204-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-apphost-pack-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-debuginfo-5.0.204-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-host-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-hostfxr-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-runtime-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-sdk-5.0-5.0.204-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-targeting-pack-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-templates-5.0-5.0.204-1.el7_9.x86_64.rpm
rh-dotnet50-netstandard-targeting-pack-2.1-5.0.204-1.el7_9.x86_64.rpm

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

Source:
rh-dotnet50-dotnet-5.0.204-1.el7_9.src.rpm

x86_64:
rh-dotnet50-aspnetcore-runtime-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-aspnetcore-targeting-pack-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-5.0.204-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-apphost-pack-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-debuginfo-5.0.204-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-host-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-hostfxr-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-runtime-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-sdk-5.0-5.0.204-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-targeting-pack-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-templates-5.0-5.0.204-1.el7_9.x86_64.rpm
rh-dotnet50-netstandard-targeting-pack-2.1-5.0.204-1.el7_9.x86_64.rpm

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

Source:
rh-dotnet50-dotnet-5.0.204-1.el7_9.src.rpm

x86_64:
rh-dotnet50-aspnetcore-runtime-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-aspnetcore-targeting-pack-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-5.0.204-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-apphost-pack-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-debuginfo-5.0.204-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-host-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-hostfxr-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-runtime-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-sdk-5.0-5.0.204-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-targeting-pack-5.0-5.0.7-1.el7_9.x86_64.rpm
rh-dotnet50-dotnet-templates-5.0-5.0.204-1.el7_9.x86_64.rpm
rh-dotnet50-netstandard-targeting-pack-2.1-5.0.204-1.el7_9.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-2021-31957
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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