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

Synopsis:          Important: rh-nginx118-nginx security update
Advisory ID:       RHSA-2021:2258-01
Product:           Red Hat Software Collections
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:2258
Issue date:        2021-06-07
CVE Names:         CVE-2021-23017 
=====================================================================

1. Summary:

An update for rh-nginx118-nginx is now available for Red Hat Software
Collections.

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 Software Collections for Red Hat Enterprise Linux Server (v. 7) - ppc64le, s390x, x86_64
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) - ppc64le, s390x, x86_64
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) - x86_64

3. Description:

nginx is a web and proxy server supporting HTTP and other protocols, with a
focus on high concurrency, performance, and low memory usage. 

Security Fix(es):

* nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a
pointer to a root domain name (CVE-2021-23017)

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

The rh-nginx118-nginx service must be restarted for this update to take
effect.

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

1963121 - CVE-2021-23017 nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name

6. Package List:

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7):

Source:
rh-nginx118-nginx-1.18.0-3.el7.src.rpm

ppc64le:
rh-nginx118-nginx-1.18.0-3.el7.ppc64le.rpm
rh-nginx118-nginx-debuginfo-1.18.0-3.el7.ppc64le.rpm
rh-nginx118-nginx-mod-http-image-filter-1.18.0-3.el7.ppc64le.rpm
rh-nginx118-nginx-mod-http-perl-1.18.0-3.el7.ppc64le.rpm
rh-nginx118-nginx-mod-http-xslt-filter-1.18.0-3.el7.ppc64le.rpm
rh-nginx118-nginx-mod-mail-1.18.0-3.el7.ppc64le.rpm
rh-nginx118-nginx-mod-stream-1.18.0-3.el7.ppc64le.rpm

s390x:
rh-nginx118-nginx-1.18.0-3.el7.s390x.rpm
rh-nginx118-nginx-debuginfo-1.18.0-3.el7.s390x.rpm
rh-nginx118-nginx-mod-http-image-filter-1.18.0-3.el7.s390x.rpm
rh-nginx118-nginx-mod-http-perl-1.18.0-3.el7.s390x.rpm
rh-nginx118-nginx-mod-http-xslt-filter-1.18.0-3.el7.s390x.rpm
rh-nginx118-nginx-mod-mail-1.18.0-3.el7.s390x.rpm
rh-nginx118-nginx-mod-stream-1.18.0-3.el7.s390x.rpm

x86_64:
rh-nginx118-nginx-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-debuginfo-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-http-image-filter-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-http-perl-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-http-xslt-filter-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-mail-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-stream-1.18.0-3.el7.x86_64.rpm

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7):

Source:
rh-nginx118-nginx-1.18.0-3.el7.src.rpm

ppc64le:
rh-nginx118-nginx-1.18.0-3.el7.ppc64le.rpm
rh-nginx118-nginx-debuginfo-1.18.0-3.el7.ppc64le.rpm
rh-nginx118-nginx-mod-http-image-filter-1.18.0-3.el7.ppc64le.rpm
rh-nginx118-nginx-mod-http-perl-1.18.0-3.el7.ppc64le.rpm
rh-nginx118-nginx-mod-http-xslt-filter-1.18.0-3.el7.ppc64le.rpm
rh-nginx118-nginx-mod-mail-1.18.0-3.el7.ppc64le.rpm
rh-nginx118-nginx-mod-stream-1.18.0-3.el7.ppc64le.rpm

s390x:
rh-nginx118-nginx-1.18.0-3.el7.s390x.rpm
rh-nginx118-nginx-debuginfo-1.18.0-3.el7.s390x.rpm
rh-nginx118-nginx-mod-http-image-filter-1.18.0-3.el7.s390x.rpm
rh-nginx118-nginx-mod-http-perl-1.18.0-3.el7.s390x.rpm
rh-nginx118-nginx-mod-http-xslt-filter-1.18.0-3.el7.s390x.rpm
rh-nginx118-nginx-mod-mail-1.18.0-3.el7.s390x.rpm
rh-nginx118-nginx-mod-stream-1.18.0-3.el7.s390x.rpm

x86_64:
rh-nginx118-nginx-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-debuginfo-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-http-image-filter-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-http-perl-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-http-xslt-filter-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-mail-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-stream-1.18.0-3.el7.x86_64.rpm

Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7):

Source:
rh-nginx118-nginx-1.18.0-3.el7.src.rpm

x86_64:
rh-nginx118-nginx-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-debuginfo-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-http-image-filter-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-http-perl-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-http-xslt-filter-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-mail-1.18.0-3.el7.x86_64.rpm
rh-nginx118-nginx-mod-stream-1.18.0-3.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-2021-23017
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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