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

Synopsis:          Moderate: Red Hat OpenStack Platform 16.2 (etcd) security update
Advisory ID:       RHSA-2021:3487-01
Product:           Red Hat OpenStack Platform
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:3487
Issue date:        2021-09-15
CVE Names:         CVE-2021-31525 CVE-2021-33195 CVE-2021-33197 
                   CVE-2021-33198 
=====================================================================

1. Summary:

An update for etcd is now available for Red Hat OpenStack Platform 16.2
(Train).

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:

Red Hat OpenStack Platform 16.2 - ppc64le, x86_64

3. Description:

A highly-available key value store for shared configuration

Security Fix(es):

* net/http: panic in ReadRequest and ReadResponse when reading a very large
header (CVE-2021-31525)

* golang: net: lookup functions may return invalid host names
(CVE-2021-33195)

* golang: net/http/httputil: ReverseProxy forwards connection headers if
first one is empty (CVE-2021-33197)

* golang: math/big.Rat: may cause a panic or an unrecoverable fatal error
if passed inputs with very large exponents (CVE-2021-33198)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page 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/):

1958341 - CVE-2021-31525 golang: net/http: panic in ReadRequest and ReadResponse when reading a very large header
1989564 - CVE-2021-33195 golang: net: lookup functions may return invalid host names
1989570 - CVE-2021-33197 golang: net/http/httputil: ReverseProxy forwards connection headers if first one is empty
1989575 - CVE-2021-33198 golang: math/big.Rat: may cause a panic or an unrecoverable fatal error if passed inputs with very large exponents

6. Package List:

Red Hat OpenStack Platform 16.2:

Source:
etcd-3.3.23-3.1.el8ost.1.src.rpm

ppc64le:
etcd-3.3.23-3.1.el8ost.1.ppc64le.rpm
etcd-debuginfo-3.3.23-3.1.el8ost.1.ppc64le.rpm
etcd-debugsource-3.3.23-3.1.el8ost.1.ppc64le.rpm

x86_64:
etcd-3.3.23-3.1.el8ost.1.x86_64.rpm
etcd-debuginfo-3.3.23-3.1.el8ost.1.x86_64.rpm
etcd-debugsource-3.3.23-3.1.el8ost.1.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-2021-31525
https://access.redhat.com/security/cve/CVE-2021-33195
https://access.redhat.com/security/cve/CVE-2021-33197
https://access.redhat.com/security/cve/CVE-2021-33198
https://access.redhat.com/security/updates/classification/#moderate

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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