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.. Copyright (C) Internet Systems Consortium, Inc. ("ISC")
..
.. SPDX-License-Identifier: MPL-2.0
..
.. This Source Code Form is subject to the terms of the Mozilla Public
.. License, v. 2.0. If a copy of the MPL was not distributed with this
.. file, you can obtain one at https://mozilla.org/MPL/2.0/.
..
.. See the COPYRIGHT file distributed with this work for additional
.. information regarding copyright ownership.
Notes for BIND 9.18.24
----------------------
Security Fixes
~~~~~~~~~~~~~~
- Validating DNS messages containing a lot of DNSSEC signatures could
cause excessive CPU load, leading to a denial-of-service condition.
This has been fixed. :cve:`2023-50387`
ISC would like to thank Elias Heftrig, Haya Schulmann, Niklas Vogel,
and Michael Waidner from the German National Research Center for
Applied Cybersecurity ATHENE for bringing this vulnerability to our
attention. :gl:`#4424`
- Preparing an NSEC3 closest encloser proof could cause excessive CPU
load, leading to a denial-of-service condition. This has been fixed.
:cve:`2023-50868` :gl:`#4459`
- Parsing DNS messages with many different names could cause excessive
CPU load. This has been fixed. :cve:`2023-4408`
ISC would like to thank Shoham Danino from Reichman University, Anat
Bremler-Barr from Tel-Aviv University, Yehuda Afek from Tel-Aviv
University, and Yuval Shavitt from Tel-Aviv University for bringing
this vulnerability to our attention. :gl:`#4234`
- Specific queries could cause :iscman:`named` to crash with an
assertion failure when :any:`nxdomain-redirect` was enabled. This has
been fixed. :cve:`2023-5517` :gl:`#4281`
- A bad interaction between DNS64 and serve-stale could cause
:iscman:`named` to crash with an assertion failure, when both of these
features were enabled. This has been fixed. :cve:`2023-5679`
:gl:`#4334`
- Under certain circumstances, the DNS-over-TLS client code incorrectly
attempted to process more than one DNS message at a time, which could
cause :iscman:`named` to crash with an assertion failure. This has
been fixed. :gl:`#4487`
Bug Fixes
~~~~~~~~~
- The counters exported via the statistics channel were changed back to
64-bit signed values; they were being inadvertently truncated to
unsigned 32-bit values since BIND 9.15.0. :gl:`#4467`
Known Issues
~~~~~~~~~~~~
- There are no new known issues with this release. See :ref:`above
<relnotes_known_issues>` for a list of all known issues affecting this
BIND 9 branch.
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