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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: .NET Core on Red Hat Enterprise Linux security update
Advisory ID:       RHSA-2019:0040-01
Product:           .NET Core on Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2019:0040
Issue date:        2019-01-09
CVE Names:         CVE-2019-0545 CVE-2019-0548 CVE-2019-0564 
=====================================================================

1. Summary:

Updates for rh-dotnet21-dotnet and rh-dotnet22-dotnet are now available for
.NET Core on Red Hat Enterprise Linux.

Red Hat Product Security has rated this update as having a security impact
of Moderate. 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 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 security vulnerabilities are now
available. The updated versions are .NET Core 2.1.5 and 2.2.1.

Security Fix(es):

* .NET Core: NCL - SocketsHttpHandler mishandling 1xx response as a final
response leads to info disclosure (CVE-2019-0545)

* .NET Core: ANCM WebSocket DOS (CVE-2019-0548)

* .NET Core: Kestrel - WebSocket DoS via CancellationToken (CoreFX and
ASP.NET) (CVE-2019-0564)

For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.

For more information, please refer to the upstream docs in the References
section.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

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

1660632 - CVE-2019-0545 .NET Core: NCL - SocketsHttpHandler mishandling 1xx response as a final response leads to info disclosure
1660634 - CVE-2019-0564 .NET Core: Kestrel - WebSocket DoS via CancellationToken (CoreFX and ASP.NET)
1660636 - CVE-2019-0548 .NET Core: ANCM WebSocket DOS

6. Package List:

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

Source:
rh-dotnet21-2.1-6.el7.src.rpm
rh-dotnet21-dotnet-2.1.503-1.el7.src.rpm

x86_64:
rh-dotnet21-dotnet-sdk-2.1-2.1.503-1.el7.x86_64.rpm
rh-dotnet21-runtime-2.1-6.el7.x86_64.rpm

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

Source:
rh-dotnet22-2.2-2.el7.src.rpm
rh-dotnet22-dotnet-2.2.102-1.el7.src.rpm

x86_64:
rh-dotnet22-2.2-2.el7.x86_64.rpm
rh-dotnet22-dotnet-2.2.102-1.el7.x86_64.rpm
rh-dotnet22-dotnet-debuginfo-2.2.102-1.el7.x86_64.rpm
rh-dotnet22-dotnet-host-2.2.1-1.el7.x86_64.rpm
rh-dotnet22-dotnet-host-fxr-2.2-2.2.1-1.el7.x86_64.rpm
rh-dotnet22-dotnet-runtime-2.2-2.2.1-1.el7.x86_64.rpm
rh-dotnet22-dotnet-sdk-2.2-2.2.102-1.el7.x86_64.rpm
rh-dotnet22-dotnet-sdk-2.2.1xx-2.2.102-1.el7.x86_64.rpm
rh-dotnet22-runtime-2.2-2.el7.x86_64.rpm

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

Source:
rh-dotnet21-2.1-6.el7.src.rpm
rh-dotnet21-dotnet-2.1.503-1.el7.src.rpm

x86_64:
rh-dotnet21-dotnet-sdk-2.1-2.1.503-1.el7.x86_64.rpm
rh-dotnet21-runtime-2.1-6.el7.x86_64.rpm

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

Source:
rh-dotnet22-2.2-2.el7.src.rpm
rh-dotnet22-dotnet-2.2.102-1.el7.src.rpm

x86_64:
rh-dotnet22-2.2-2.el7.x86_64.rpm
rh-dotnet22-dotnet-2.2.102-1.el7.x86_64.rpm
rh-dotnet22-dotnet-debuginfo-2.2.102-1.el7.x86_64.rpm
rh-dotnet22-dotnet-host-2.2.1-1.el7.x86_64.rpm
rh-dotnet22-dotnet-host-fxr-2.2-2.2.1-1.el7.x86_64.rpm
rh-dotnet22-dotnet-runtime-2.2-2.2.1-1.el7.x86_64.rpm
rh-dotnet22-dotnet-sdk-2.2-2.2.102-1.el7.x86_64.rpm
rh-dotnet22-dotnet-sdk-2.2.1xx-2.2.102-1.el7.x86_64.rpm
rh-dotnet22-runtime-2.2-2.el7.x86_64.rpm

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

Source:
rh-dotnet21-2.1-6.el7.src.rpm
rh-dotnet21-dotnet-2.1.503-1.el7.src.rpm

x86_64:
rh-dotnet21-dotnet-sdk-2.1-2.1.503-1.el7.x86_64.rpm
rh-dotnet21-runtime-2.1-6.el7.x86_64.rpm

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

Source:
rh-dotnet22-2.2-2.el7.src.rpm
rh-dotnet22-dotnet-2.2.102-1.el7.src.rpm

x86_64:
rh-dotnet22-2.2-2.el7.x86_64.rpm
rh-dotnet22-dotnet-2.2.102-1.el7.x86_64.rpm
rh-dotnet22-dotnet-debuginfo-2.2.102-1.el7.x86_64.rpm
rh-dotnet22-dotnet-host-2.2.1-1.el7.x86_64.rpm
rh-dotnet22-dotnet-host-fxr-2.2-2.2.1-1.el7.x86_64.rpm
rh-dotnet22-dotnet-runtime-2.2-2.2.1-1.el7.x86_64.rpm
rh-dotnet22-dotnet-sdk-2.2-2.2.102-1.el7.x86_64.rpm
rh-dotnet22-dotnet-sdk-2.2.1xx-2.2.102-1.el7.x86_64.rpm
rh-dotnet22-runtime-2.2-2.el7.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-2019-0545
https://access.redhat.com/security/cve/CVE-2019-0548
https://access.redhat.com/security/cve/CVE-2019-0564
https://access.redhat.com/security/updates/classification/#moderate
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0545
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0548
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0564

8. Contact:

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

Copyright 2019 Red Hat, Inc.
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