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

Synopsis:          Moderate: bind security, bug fix, and enhancement update
Advisory ID:       RHSA-2020:4500-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2020:4500
Issue date:        2020-11-03
CVE Names:         CVE-2020-8619 CVE-2020-8622 CVE-2020-8623
                   CVE-2020-8624
====================================================================
1. Summary:

An update for bind is now available for Red Hat Enterprise Linux 8.

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 Enterprise Linux AppStream (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64
Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, ppc64le, s390x, 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.

The following packages have been upgraded to a later upstream version: bind
(9.11.20). (BZ#1818785)

Security Fix(es):

* bind: asterisk character in an empty non-terminal can cause an assertion
failure in rbtdb.c (CVE-2020-8619)

* bind: truncated TSIG response can lead to an assertion failure
(CVE-2020-8622)

* bind: remotely triggerable assertion failure in pk11.c (CVE-2020-8623)

* bind: incorrect enforcement of update-policy rules of type "subdomain"
(CVE-2020-8624)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 8.3 Release Notes linked from 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/):

1693395 - Remove revoked KSK from trusted keys
1749505 - internal test suite failures
1814158 - bind internal testsuite, random failure in autosign
1817870 - /usr/bin/nsupdate -g segfault when connect to AD
1847244 - CVE-2020-8619 bind: asterisk character in an empty non-terminal can cause an assertion failure in rbtdb.c
1848169 - named-checkconf fails to validate configuration file with CIDRs with host bits set
1859454 - named-pkcs11.service:  (named-pkcs11) of user 25 dumped core.
1869473 - CVE-2020-8622 bind: truncated TSIG response can lead to an assertion failure
1869477 - CVE-2020-8623 bind: remotely triggerable assertion failure in pk11.c
1869480 - CVE-2020-8624 bind: incorrect enforcement of update-policy rules of type "subdomain"

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

aarch64:
bind-9.11.20-5.el8.aarch64.rpm
bind-chroot-9.11.20-5.el8.aarch64.rpm
bind-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-debugsource-9.11.20-5.el8.aarch64.rpm
bind-devel-9.11.20-5.el8.aarch64.rpm
bind-export-libs-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-libs-9.11.20-5.el8.aarch64.rpm
bind-libs-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-libs-lite-9.11.20-5.el8.aarch64.rpm
bind-libs-lite-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-lite-devel-9.11.20-5.el8.aarch64.rpm
bind-pkcs11-9.11.20-5.el8.aarch64.rpm
bind-pkcs11-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-pkcs11-devel-9.11.20-5.el8.aarch64.rpm
bind-pkcs11-libs-9.11.20-5.el8.aarch64.rpm
bind-pkcs11-libs-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-pkcs11-utils-9.11.20-5.el8.aarch64.rpm
bind-pkcs11-utils-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-sdb-9.11.20-5.el8.aarch64.rpm
bind-sdb-chroot-9.11.20-5.el8.aarch64.rpm
bind-sdb-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-utils-9.11.20-5.el8.aarch64.rpm
bind-utils-debuginfo-9.11.20-5.el8.aarch64.rpm

noarch:
bind-license-9.11.20-5.el8.noarch.rpm
python3-bind-9.11.20-5.el8.noarch.rpm

ppc64le:
bind-9.11.20-5.el8.ppc64le.rpm
bind-chroot-9.11.20-5.el8.ppc64le.rpm
bind-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-debugsource-9.11.20-5.el8.ppc64le.rpm
bind-devel-9.11.20-5.el8.ppc64le.rpm
bind-export-libs-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-libs-9.11.20-5.el8.ppc64le.rpm
bind-libs-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-libs-lite-9.11.20-5.el8.ppc64le.rpm
bind-libs-lite-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-lite-devel-9.11.20-5.el8.ppc64le.rpm
bind-pkcs11-9.11.20-5.el8.ppc64le.rpm
bind-pkcs11-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-pkcs11-devel-9.11.20-5.el8.ppc64le.rpm
bind-pkcs11-libs-9.11.20-5.el8.ppc64le.rpm
bind-pkcs11-libs-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-pkcs11-utils-9.11.20-5.el8.ppc64le.rpm
bind-pkcs11-utils-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-sdb-9.11.20-5.el8.ppc64le.rpm
bind-sdb-chroot-9.11.20-5.el8.ppc64le.rpm
bind-sdb-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-utils-9.11.20-5.el8.ppc64le.rpm
bind-utils-debuginfo-9.11.20-5.el8.ppc64le.rpm

s390x:
bind-9.11.20-5.el8.s390x.rpm
bind-chroot-9.11.20-5.el8.s390x.rpm
bind-debuginfo-9.11.20-5.el8.s390x.rpm
bind-debugsource-9.11.20-5.el8.s390x.rpm
bind-devel-9.11.20-5.el8.s390x.rpm
bind-export-libs-debuginfo-9.11.20-5.el8.s390x.rpm
bind-libs-9.11.20-5.el8.s390x.rpm
bind-libs-debuginfo-9.11.20-5.el8.s390x.rpm
bind-libs-lite-9.11.20-5.el8.s390x.rpm
bind-libs-lite-debuginfo-9.11.20-5.el8.s390x.rpm
bind-lite-devel-9.11.20-5.el8.s390x.rpm
bind-pkcs11-9.11.20-5.el8.s390x.rpm
bind-pkcs11-debuginfo-9.11.20-5.el8.s390x.rpm
bind-pkcs11-devel-9.11.20-5.el8.s390x.rpm
bind-pkcs11-libs-9.11.20-5.el8.s390x.rpm
bind-pkcs11-libs-debuginfo-9.11.20-5.el8.s390x.rpm
bind-pkcs11-utils-9.11.20-5.el8.s390x.rpm
bind-pkcs11-utils-debuginfo-9.11.20-5.el8.s390x.rpm
bind-sdb-9.11.20-5.el8.s390x.rpm
bind-sdb-chroot-9.11.20-5.el8.s390x.rpm
bind-sdb-debuginfo-9.11.20-5.el8.s390x.rpm
bind-utils-9.11.20-5.el8.s390x.rpm
bind-utils-debuginfo-9.11.20-5.el8.s390x.rpm

x86_64:
bind-9.11.20-5.el8.x86_64.rpm
bind-chroot-9.11.20-5.el8.x86_64.rpm
bind-debuginfo-9.11.20-5.el8.i686.rpm
bind-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-debugsource-9.11.20-5.el8.i686.rpm
bind-debugsource-9.11.20-5.el8.x86_64.rpm
bind-devel-9.11.20-5.el8.i686.rpm
bind-devel-9.11.20-5.el8.x86_64.rpm
bind-export-libs-debuginfo-9.11.20-5.el8.i686.rpm
bind-export-libs-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-libs-9.11.20-5.el8.i686.rpm
bind-libs-9.11.20-5.el8.x86_64.rpm
bind-libs-debuginfo-9.11.20-5.el8.i686.rpm
bind-libs-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-libs-lite-9.11.20-5.el8.i686.rpm
bind-libs-lite-9.11.20-5.el8.x86_64.rpm
bind-libs-lite-debuginfo-9.11.20-5.el8.i686.rpm
bind-libs-lite-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-lite-devel-9.11.20-5.el8.i686.rpm
bind-lite-devel-9.11.20-5.el8.x86_64.rpm
bind-pkcs11-9.11.20-5.el8.x86_64.rpm
bind-pkcs11-debuginfo-9.11.20-5.el8.i686.rpm
bind-pkcs11-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-pkcs11-devel-9.11.20-5.el8.i686.rpm
bind-pkcs11-devel-9.11.20-5.el8.x86_64.rpm
bind-pkcs11-libs-9.11.20-5.el8.i686.rpm
bind-pkcs11-libs-9.11.20-5.el8.x86_64.rpm
bind-pkcs11-libs-debuginfo-9.11.20-5.el8.i686.rpm
bind-pkcs11-libs-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-pkcs11-utils-9.11.20-5.el8.x86_64.rpm
bind-pkcs11-utils-debuginfo-9.11.20-5.el8.i686.rpm
bind-pkcs11-utils-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-sdb-9.11.20-5.el8.x86_64.rpm
bind-sdb-chroot-9.11.20-5.el8.x86_64.rpm
bind-sdb-debuginfo-9.11.20-5.el8.i686.rpm
bind-sdb-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-utils-9.11.20-5.el8.x86_64.rpm
bind-utils-debuginfo-9.11.20-5.el8.i686.rpm
bind-utils-debuginfo-9.11.20-5.el8.x86_64.rpm

Red Hat Enterprise Linux BaseOS (v. 8):

Source:
bind-9.11.20-5.el8.src.rpm

aarch64:
bind-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-debugsource-9.11.20-5.el8.aarch64.rpm
bind-export-devel-9.11.20-5.el8.aarch64.rpm
bind-export-libs-9.11.20-5.el8.aarch64.rpm
bind-export-libs-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-libs-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-libs-lite-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-pkcs11-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-pkcs11-libs-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-pkcs11-utils-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-sdb-debuginfo-9.11.20-5.el8.aarch64.rpm
bind-utils-debuginfo-9.11.20-5.el8.aarch64.rpm

ppc64le:
bind-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-debugsource-9.11.20-5.el8.ppc64le.rpm
bind-export-devel-9.11.20-5.el8.ppc64le.rpm
bind-export-libs-9.11.20-5.el8.ppc64le.rpm
bind-export-libs-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-libs-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-libs-lite-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-pkcs11-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-pkcs11-libs-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-pkcs11-utils-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-sdb-debuginfo-9.11.20-5.el8.ppc64le.rpm
bind-utils-debuginfo-9.11.20-5.el8.ppc64le.rpm

s390x:
bind-debuginfo-9.11.20-5.el8.s390x.rpm
bind-debugsource-9.11.20-5.el8.s390x.rpm
bind-export-devel-9.11.20-5.el8.s390x.rpm
bind-export-libs-9.11.20-5.el8.s390x.rpm
bind-export-libs-debuginfo-9.11.20-5.el8.s390x.rpm
bind-libs-debuginfo-9.11.20-5.el8.s390x.rpm
bind-libs-lite-debuginfo-9.11.20-5.el8.s390x.rpm
bind-pkcs11-debuginfo-9.11.20-5.el8.s390x.rpm
bind-pkcs11-libs-debuginfo-9.11.20-5.el8.s390x.rpm
bind-pkcs11-utils-debuginfo-9.11.20-5.el8.s390x.rpm
bind-sdb-debuginfo-9.11.20-5.el8.s390x.rpm
bind-utils-debuginfo-9.11.20-5.el8.s390x.rpm

x86_64:
bind-debuginfo-9.11.20-5.el8.i686.rpm
bind-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-debugsource-9.11.20-5.el8.i686.rpm
bind-debugsource-9.11.20-5.el8.x86_64.rpm
bind-export-devel-9.11.20-5.el8.i686.rpm
bind-export-devel-9.11.20-5.el8.x86_64.rpm
bind-export-libs-9.11.20-5.el8.i686.rpm
bind-export-libs-9.11.20-5.el8.x86_64.rpm
bind-export-libs-debuginfo-9.11.20-5.el8.i686.rpm
bind-export-libs-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-libs-debuginfo-9.11.20-5.el8.i686.rpm
bind-libs-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-libs-lite-debuginfo-9.11.20-5.el8.i686.rpm
bind-libs-lite-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-pkcs11-debuginfo-9.11.20-5.el8.i686.rpm
bind-pkcs11-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-pkcs11-libs-debuginfo-9.11.20-5.el8.i686.rpm
bind-pkcs11-libs-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-pkcs11-utils-debuginfo-9.11.20-5.el8.i686.rpm
bind-pkcs11-utils-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-sdb-debuginfo-9.11.20-5.el8.i686.rpm
bind-sdb-debuginfo-9.11.20-5.el8.x86_64.rpm
bind-utils-debuginfo-9.11.20-5.el8.i686.rpm
bind-utils-debuginfo-9.11.20-5.el8.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-2020-8619
https://access.redhat.com/security/cve/CVE-2020-8622
https://access.redhat.com/security/cve/CVE-2020-8623
https://access.redhat.com/security/cve/CVE-2020-8624
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/index

8. Contact:

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

Copyright 2020 Red Hat, Inc.
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