-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

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

Synopsis:          Important: bind security update
Advisory ID:       RHSA-2021:1475-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:1475
Issue date:        2021-05-03
CVE Names:         CVE-2021-25215 
====================================================================
1. Summary:

An update for bind is now available for Red Hat Enterprise Linux 7.3
Advanced Update Support.

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 Server AUS (v. 7.3) - noarch, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.3) - x86_64

3. Description:

The Berkeley Internet Name Domain (BIND) is an implementation of the Domain
Name System (DNS) protocols. BIND includes a DNS server (named); a resolver
library (routines for applications to use when interfacing with DNS); and
tools for verifying that the DNS server is operating correctly.

Security Fix(es):

* bind: An assertion check can fail while answering queries for DNAME
records that require the DNAME to be processed to resolve itself
(CVE-2021-25215)

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

After installing the update, the BIND daemon (named) will be restarted
automatically.

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

1953857 - CVE-2021-25215 bind: An assertion check can fail while answering queries for DNAME records that require the DNAME to be processed to resolve itself

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 7.3):

Source:
bind-9.9.4-50.el7_3.6.src.rpm

noarch:
bind-license-9.9.4-50.el7_3.6.noarch.rpm

x86_64:
bind-9.9.4-50.el7_3.6.x86_64.rpm
bind-chroot-9.9.4-50.el7_3.6.x86_64.rpm
bind-debuginfo-9.9.4-50.el7_3.6.i686.rpm
bind-debuginfo-9.9.4-50.el7_3.6.x86_64.rpm
bind-libs-9.9.4-50.el7_3.6.i686.rpm
bind-libs-9.9.4-50.el7_3.6.x86_64.rpm
bind-libs-lite-9.9.4-50.el7_3.6.i686.rpm
bind-libs-lite-9.9.4-50.el7_3.6.x86_64.rpm
bind-pkcs11-9.9.4-50.el7_3.6.x86_64.rpm
bind-pkcs11-libs-9.9.4-50.el7_3.6.i686.rpm
bind-pkcs11-libs-9.9.4-50.el7_3.6.x86_64.rpm
bind-pkcs11-utils-9.9.4-50.el7_3.6.x86_64.rpm
bind-utils-9.9.4-50.el7_3.6.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.3):

x86_64:
bind-debuginfo-9.9.4-50.el7_3.6.i686.rpm
bind-debuginfo-9.9.4-50.el7_3.6.x86_64.rpm
bind-devel-9.9.4-50.el7_3.6.i686.rpm
bind-devel-9.9.4-50.el7_3.6.x86_64.rpm
bind-lite-devel-9.9.4-50.el7_3.6.i686.rpm
bind-lite-devel-9.9.4-50.el7_3.6.x86_64.rpm
bind-pkcs11-devel-9.9.4-50.el7_3.6.i686.rpm
bind-pkcs11-devel-9.9.4-50.el7_3.6.x86_64.rpm
bind-sdb-9.9.4-50.el7_3.6.x86_64.rpm
bind-sdb-chroot-9.9.4-50.el7_3.6.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-2021-25215
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2021 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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qN/Z
-----END PGP SIGNATURE-----

--
RHSA-announce mailing list
RHSA-announce@redhat.com
https://listman.redhat.com/mailman/listinfo/rhsa-announce