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Red Hat Security Advisory 2023-4037-01

Red Hat Security Advisory 2023-4037-01 - An update for bind9.16 is now available for Red Hat Enterprise Linux 8.6 Extended Update Support.

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

Synopsis: Important: bind9.16 security update
Advisory ID: RHSA-2023:4037-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:4037
Issue date: 2023-07-12
CVE Names: CVE-2023-2828
=====================================================================

  1. Summary:

An update for bind9.16 is now available for Red Hat Enterprise Linux 8.6
Extended 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.

  1. Relevant releases/architectures:

Red Hat CodeReady Linux Builder EUS (v.8.6) - aarch64, noarch, ppc64le, s390x, x86_64
Red Hat Enterprise Linux AppStream EUS (v.8.6) - aarch64, noarch, ppc64le, s390x, x86_64

  1. 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: named’s configured cache size limit can be significantly exceeded
    (CVE-2023-2828)

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.

  1. 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

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

2216227 - CVE-2023-2828 bind: named’s configured cache size limit can be significantly exceeded

  1. Package List:

Red Hat Enterprise Linux AppStream EUS (v.8.6):

Source:
bind9.16-9.16.23-0.7.el8_6.2.src.rpm

aarch64:
bind9.16-9.16.23-0.7.el8_6.2.aarch64.rpm
bind9.16-chroot-9.16.23-0.7.el8_6.2.aarch64.rpm
bind9.16-debuginfo-9.16.23-0.7.el8_6.2.aarch64.rpm
bind9.16-debugsource-9.16.23-0.7.el8_6.2.aarch64.rpm
bind9.16-dnssec-utils-debuginfo-9.16.23-0.7.el8_6.2.aarch64.rpm
bind9.16-libs-9.16.23-0.7.el8_6.2.aarch64.rpm
bind9.16-libs-debuginfo-9.16.23-0.7.el8_6.2.aarch64.rpm
bind9.16-utils-9.16.23-0.7.el8_6.2.aarch64.rpm
bind9.16-utils-debuginfo-9.16.23-0.7.el8_6.2.aarch64.rpm

noarch:
bind9.16-license-9.16.23-0.7.el8_6.2.noarch.rpm

ppc64le:
bind9.16-9.16.23-0.7.el8_6.2.ppc64le.rpm
bind9.16-chroot-9.16.23-0.7.el8_6.2.ppc64le.rpm
bind9.16-debuginfo-9.16.23-0.7.el8_6.2.ppc64le.rpm
bind9.16-debugsource-9.16.23-0.7.el8_6.2.ppc64le.rpm
bind9.16-dnssec-utils-debuginfo-9.16.23-0.7.el8_6.2.ppc64le.rpm
bind9.16-libs-9.16.23-0.7.el8_6.2.ppc64le.rpm
bind9.16-libs-debuginfo-9.16.23-0.7.el8_6.2.ppc64le.rpm
bind9.16-utils-9.16.23-0.7.el8_6.2.ppc64le.rpm
bind9.16-utils-debuginfo-9.16.23-0.7.el8_6.2.ppc64le.rpm

s390x:
bind9.16-9.16.23-0.7.el8_6.2.s390x.rpm
bind9.16-chroot-9.16.23-0.7.el8_6.2.s390x.rpm
bind9.16-debuginfo-9.16.23-0.7.el8_6.2.s390x.rpm
bind9.16-debugsource-9.16.23-0.7.el8_6.2.s390x.rpm
bind9.16-dnssec-utils-debuginfo-9.16.23-0.7.el8_6.2.s390x.rpm
bind9.16-libs-9.16.23-0.7.el8_6.2.s390x.rpm
bind9.16-libs-debuginfo-9.16.23-0.7.el8_6.2.s390x.rpm
bind9.16-utils-9.16.23-0.7.el8_6.2.s390x.rpm
bind9.16-utils-debuginfo-9.16.23-0.7.el8_6.2.s390x.rpm

x86_64:
bind9.16-9.16.23-0.7.el8_6.2.x86_64.rpm
bind9.16-chroot-9.16.23-0.7.el8_6.2.x86_64.rpm
bind9.16-debuginfo-9.16.23-0.7.el8_6.2.x86_64.rpm
bind9.16-debugsource-9.16.23-0.7.el8_6.2.x86_64.rpm
bind9.16-dnssec-utils-debuginfo-9.16.23-0.7.el8_6.2.x86_64.rpm
bind9.16-libs-9.16.23-0.7.el8_6.2.x86_64.rpm
bind9.16-libs-debuginfo-9.16.23-0.7.el8_6.2.x86_64.rpm
bind9.16-utils-9.16.23-0.7.el8_6.2.x86_64.rpm
bind9.16-utils-debuginfo-9.16.23-0.7.el8_6.2.x86_64.rpm

Red Hat CodeReady Linux Builder EUS (v.8.6):

aarch64:
bind9.16-debuginfo-9.16.23-0.7.el8_6.2.aarch64.rpm
bind9.16-debugsource-9.16.23-0.7.el8_6.2.aarch64.rpm
bind9.16-devel-9.16.23-0.7.el8_6.2.aarch64.rpm
bind9.16-dnssec-utils-9.16.23-0.7.el8_6.2.aarch64.rpm
bind9.16-dnssec-utils-debuginfo-9.16.23-0.7.el8_6.2.aarch64.rpm
bind9.16-libs-debuginfo-9.16.23-0.7.el8_6.2.aarch64.rpm
bind9.16-utils-debuginfo-9.16.23-0.7.el8_6.2.aarch64.rpm

noarch:
bind9.16-doc-9.16.23-0.7.el8_6.2.noarch.rpm
python3-bind9.16-9.16.23-0.7.el8_6.2.noarch.rpm

ppc64le:
bind9.16-debuginfo-9.16.23-0.7.el8_6.2.ppc64le.rpm
bind9.16-debugsource-9.16.23-0.7.el8_6.2.ppc64le.rpm
bind9.16-devel-9.16.23-0.7.el8_6.2.ppc64le.rpm
bind9.16-dnssec-utils-9.16.23-0.7.el8_6.2.ppc64le.rpm
bind9.16-dnssec-utils-debuginfo-9.16.23-0.7.el8_6.2.ppc64le.rpm
bind9.16-libs-debuginfo-9.16.23-0.7.el8_6.2.ppc64le.rpm
bind9.16-utils-debuginfo-9.16.23-0.7.el8_6.2.ppc64le.rpm

s390x:
bind9.16-debuginfo-9.16.23-0.7.el8_6.2.s390x.rpm
bind9.16-debugsource-9.16.23-0.7.el8_6.2.s390x.rpm
bind9.16-devel-9.16.23-0.7.el8_6.2.s390x.rpm
bind9.16-dnssec-utils-9.16.23-0.7.el8_6.2.s390x.rpm
bind9.16-dnssec-utils-debuginfo-9.16.23-0.7.el8_6.2.s390x.rpm
bind9.16-libs-debuginfo-9.16.23-0.7.el8_6.2.s390x.rpm
bind9.16-utils-debuginfo-9.16.23-0.7.el8_6.2.s390x.rpm

x86_64:
bind9.16-debuginfo-9.16.23-0.7.el8_6.2.i686.rpm
bind9.16-debuginfo-9.16.23-0.7.el8_6.2.x86_64.rpm
bind9.16-debugsource-9.16.23-0.7.el8_6.2.i686.rpm
bind9.16-debugsource-9.16.23-0.7.el8_6.2.x86_64.rpm
bind9.16-devel-9.16.23-0.7.el8_6.2.i686.rpm
bind9.16-devel-9.16.23-0.7.el8_6.2.x86_64.rpm
bind9.16-dnssec-utils-9.16.23-0.7.el8_6.2.x86_64.rpm
bind9.16-dnssec-utils-debuginfo-9.16.23-0.7.el8_6.2.i686.rpm
bind9.16-dnssec-utils-debuginfo-9.16.23-0.7.el8_6.2.x86_64.rpm
bind9.16-libs-9.16.23-0.7.el8_6.2.i686.rpm
bind9.16-libs-debuginfo-9.16.23-0.7.el8_6.2.i686.rpm
bind9.16-libs-debuginfo-9.16.23-0.7.el8_6.2.x86_64.rpm
bind9.16-utils-debuginfo-9.16.23-0.7.el8_6.2.i686.rpm
bind9.16-utils-debuginfo-9.16.23-0.7.el8_6.2.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/

  1. References:

https://access.redhat.com/security/cve/CVE-2023-2828
https://access.redhat.com/security/updates/classification/#important

  1. Contact:

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

Copyright 2023 Red Hat, Inc.
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Ubuntu Security Notice 6183-1 - Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered that Bind incorrectly handled the cache size limit. A remote attacker could possibly use this issue to consume memory, leading to a denial of service. It was discovered that Bind incorrectly handled the recursive-clients quota. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 22.10, and Ubuntu 23.04.

CVE-2023-2828: CVE-2023-2828

Every `named` instance configured to run as a recursive resolver maintains a cache database holding the responses to the queries it has recently sent to authoritative servers. The size limit for that cache database can be configured using the `max-cache-size` statement in the configuration file; it defaults to 90% of the total amount of memory available on the host. When the size of the cache reaches 7/8 of the configured limit, a cache-cleaning algorithm starts to remove expired and/or least-recently used RRsets from the cache, to keep memory use below the configured limit. It has been discovered that the effectiveness of the cache-cleaning algorithm used in `named` can be severely diminished by querying the resolver for specific RRsets in a certain order, effectively allowing the configured `max-cache-size` limit to be significantly exceeded. This issue affects BIND 9 versions 9.11.0 through 9.16.41, 9.18.0 through 9.18.15, 9.19.0 through 9.19.13, 9.11.3-S1 through 9.16.41-S1, and 9...

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