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AUSCERT External Security Bulletin Redistribution
ESB-2021.3403
.NET 5.0 security and bugfix update
14 October 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: .NET 5.0
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-41355
Reference: ASB-2021.0192
Original Bulletin:
https://access.redhat.com/errata/RHSA-2021:3819
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Red Hat Security Advisory
Synopsis: Important: .NET 5.0 security and bugfix update
Advisory ID: RHSA-2021:3819-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3819
Issue date: 2021-10-12
CVE Names: CVE-2021-41355
=====================================================================
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 a security vulnerability are now
available. The updated versions are .NET SDK 5.0.208 and .NET Runtime
5.0.11.
Security Fix(es):
* dotnet: System.DirectoryServices.Protocols.LdapConnection sends
credentials in plaintext if TLS handshake fails (CVE-2021-41355)
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/):
2011487 - CVE-2021-41355 dotnet: System.DirectoryServices.Protocols.LdapConnection sends credentials in plaintext if TLS handshake fails
6. Package List:
Red Hat Enterprise Linux AppStream (v. 8):
Source:
dotnet5.0-5.0.208-1.el8_4.src.rpm
x86_64:
aspnetcore-runtime-5.0-5.0.11-1.el8_4.x86_64.rpm
aspnetcore-targeting-pack-5.0-5.0.11-1.el8_4.x86_64.rpm
dotnet-5.0.208-1.el8_4.x86_64.rpm
dotnet-apphost-pack-5.0-5.0.11-1.el8_4.x86_64.rpm
dotnet-apphost-pack-5.0-debuginfo-5.0.11-1.el8_4.x86_64.rpm
dotnet-host-5.0.11-1.el8_4.x86_64.rpm
dotnet-host-debuginfo-5.0.11-1.el8_4.x86_64.rpm
dotnet-hostfxr-5.0-5.0.11-1.el8_4.x86_64.rpm
dotnet-hostfxr-5.0-debuginfo-5.0.11-1.el8_4.x86_64.rpm
dotnet-runtime-5.0-5.0.11-1.el8_4.x86_64.rpm
dotnet-runtime-5.0-debuginfo-5.0.11-1.el8_4.x86_64.rpm
dotnet-sdk-5.0-5.0.208-1.el8_4.x86_64.rpm
dotnet-sdk-5.0-debuginfo-5.0.208-1.el8_4.x86_64.rpm
dotnet-targeting-pack-5.0-5.0.11-1.el8_4.x86_64.rpm
dotnet-templates-5.0-5.0.208-1.el8_4.x86_64.rpm
dotnet5.0-debuginfo-5.0.208-1.el8_4.x86_64.rpm
dotnet5.0-debugsource-5.0.208-1.el8_4.x86_64.rpm
netstandard-targeting-pack-2.1-5.0.208-1.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-2021-41355
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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