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350 lines
13 KiB
XML
350 lines
13 KiB
XML
<!DOCTYPE book [
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<!ENTITY Scaron "Š">
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<!ENTITY ccaron "č">
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<!ENTITY aacute "á">
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<!ENTITY mdash "—">
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<!ENTITY ouml "ö">]>
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<!--
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- Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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-
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- This Source Code Form is subject to the terms of the Mozilla Public
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- License, v. 2.0. If a copy of the MPL was not distributed with this
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- file, You can obtain one at http://mozilla.org/MPL/2.0/.
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-
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- See the COPYRIGHT file distributed with this work for additional
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- information regarding copyright ownership.
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-->
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<section xmlns:db="http://docbook.org/ns/docbook" version="5.0"><info/>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="noteversion.xml"/>
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<section xml:id="relnotes_intro"><info><title>Introduction</title></info>
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<para>
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This document summarizes changes since the last production
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release on the BIND 9.11 (Extended Support Version) branch.
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Please see the <filename>CHANGES</filename> file for a further
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list of bug fixes and other changes.
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</para>
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</section>
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<section xml:id="relnotes_download"><info><title>Download</title></info>
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<para>
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The latest versions of BIND 9 software can always be found at
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<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://www.isc.org/downloads/">http://www.isc.org/downloads/</link>.
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There you will find additional information about each release,
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source code, and pre-compiled versions for Microsoft Windows
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operating systems.
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</para>
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</section>
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<section xml:id="relnotes_license"><info><title>License Change</title></info>
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<para>
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With the release of BIND 9.11.0, ISC changed to the open
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source license for BIND from the ISC license to the Mozilla
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Public License (MPL 2.0).
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</para>
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<para>
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The MPL-2.0 license requires that if you make changes to
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licensed software (e.g. BIND) and distribute them outside
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your organization, that you publish those changes under that
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same license. It does not require that you publish or disclose
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anything other than the changes you made to our software.
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</para>
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<para>
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This requirement will not affect anyone who is using BIND, with
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or without modifications, without redistributing it, nor anyone
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redistributing it without changes. Therefore, this change will be
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without consequence for most individuals and organizations who are
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using BIND.
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</para>
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<para>
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Those unsure whether or not the license change affects their
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use of BIND, or who wish to discuss how to comply with the
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license may contact ISC at <link
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xmlns:xlink="http://www.w3.org/1999/xlink"
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xlink:href="https://www.isc.org/mission/contact/">
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https://www.isc.org/mission/contact/</link>.
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</para>
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</section>
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<section xml:id="win_support"><info><title>Legacy Windows No Longer Supported</title></info>
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<para>
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As of BIND 9.11.2, Windows XP and Windows 2003 are no longer supported
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platforms for BIND; "XP" binaries are no longer available for download
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from ISC.
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</para>
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</section>
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<section xml:id="relnotes_security"><info><title>Security Fixes</title></info>
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<itemizedlist>
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<listitem>
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<para>
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An error in TSIG handling could permit unauthorized zone
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transfers or zone updates. These flaws are disclosed in
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CVE-2017-3142 and CVE-2017-3143. [RT #45383]
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</para>
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</listitem>
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<listitem>
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<para>
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The BIND installer on Windows used an unquoted service path,
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which can enable privilege escalation. This flaw is disclosed
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in CVE-2017-3141. [RT #45229]
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</para>
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</listitem>
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<listitem>
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<para>
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With certain RPZ configurations, a response with TTL 0
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could cause <command>named</command> to go into an infinite
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query loop. This flaw is disclosed in CVE-2017-3140.
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[RT #45181]
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</para>
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</listitem>
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<listitem>
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<para>
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Addresses could be referenced after being freed during resolver
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processing, causing an assertion failure. The chances of this
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happening were remote, but the introduction of a delay in
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resolution increased them. This bug is disclosed in
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CVE-2017-3145. [RT #46839]
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</para>
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</listitem>
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<listitem>
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<para>
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update-policy rules that otherwise ignore the name field now
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require that it be set to "." to ensure that any type list
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present is properly interpreted. If the name field was omitted
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from the rule declaration and a type list was present it wouldn't
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be interpreted as expected.
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</para>
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</listitem>
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</itemizedlist>
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</section>
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<section xml:id="relnotes_removed"><info><title>Removed Features</title></info>
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<itemizedlist>
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<listitem>
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<para>
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The ISC DNSSEC Lookaside Validation (DLV) service has
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been shut down; all DLV records in the dlv.isc.org zone
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have been removed. References to the service have been
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removed from BIND documentation. Lookaside validation
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is no longer used by default by <command>delv</command>.
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The DLV key has been removed from <filename>bind.keys</filename>.
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Setting <command>dnssec-lookaside</command> to
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<command>auto</command> or to use dlv.isc.org as a trust
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anchor results in a warning being issued.
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</para>
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</listitem>
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<listitem>
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<para>
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<command>named</command> will now log a warning if the old
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root DNSSEC key is explicitly configured and has not been updated.
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[RT #43670]
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</para>
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</listitem>
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<listitem>
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<para>
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<command>named</command> will now log a warning if the old
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BIND now can be compiled against libidn2 library to add
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IDNA2008 support. Previously BIND only supported IDNA2003
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using (now obsolete) idnkit-1 library.
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</para>
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</listitem>
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</itemizedlist>
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</section>
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<section xml:id="proto_changes"><info><title>Protocol Changes</title></info>
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<itemizedlist>
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<listitem>
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<para>
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BIND can now use the Ed25519 and Ed448 Edwards Curve DNSSEC
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signing algorithms described in RFC 8080. Note, however, that
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these algorithms must be supported in OpenSSL;
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currently they are only available in the development branch
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of OpenSSL at
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<link xmlns:xlink="http://www.w3.org/1999/xlink"
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xlink:href="https://github.com/openssl/openssl">
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https://github.com/openssl/openssl</link>.
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[RT #44696]
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</para>
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</listitem>
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<listitem>
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<para>
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When parsing DNS messages, EDNS KEY TAG options are checked
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for correctness. When printing messages (for example, in
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<command>dig</command>), EDNS KEY TAG options are printed
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in readable format.
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</para>
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</listitem>
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<listitem>
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<para>
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<command>rndc reload</command> could cause <command>named</command>
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to leak memory if it was invoked before the zone loading actions
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from a previous <command>rndc reload</command> command were
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completed. [RT #47076]
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</para>
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</listitem>
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</itemizedlist>
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</section>
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<section xml:id="relnotes_changes"><info><title>Feature Changes</title></info>
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<itemizedlist>
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<listitem>
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<para>
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<command>named</command> will no longer start or accept
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reconfiguration if <command>managed-keys</command> or
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<command>dnssec-validation auto</command> are in use and
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the managed-keys directory (specified by
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<command>managed-keys-directory</command>, and defaulting
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to the working directory if not specified),
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is not writable by the effective user ID. [RT #46077]
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</para>
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</listitem>
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<listitem>
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<para>
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Previously, <command>update-policy local;</command> accepted
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updates from any source so long as they were signed by the
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locally-generated session key. This has been further restricted;
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updates are now only accepted from locally configured addresses.
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[RT #45492]
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</para>
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</listitem>
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<listitem>
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<para>
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<command>dig +ednsopt</command> now accepts the names
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for EDNS options in addition to numeric values. For example,
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an EDNS Client-Subnet option could be sent using
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<command>dig +ednsopt=ecs:...</command>. Thanks to
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John Worley of Secure64 for the contribution. [RT #44461]
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</para>
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</listitem>
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<listitem>
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<para>
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Threads in <command>named</command> are now set to human-readable
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names to assist debugging on operating systems that support that.
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Threads will have names such as "isc-timer", "isc-sockmgr",
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"isc-worker0001", and so on. This will affect the reporting of
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subsidiary thread names in <command>ps</command> and
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<command>top</command>, but not the main thread. [RT #43234]
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</para>
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</listitem>
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<listitem>
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<para>
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DiG now warns about .local queries which are reserved for
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Multicast DNS. [RT #44783]
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</para>
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</listitem>
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<listitem>
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<para>
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<command>dig +noidnin</command> can be used to disable IDN
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processing on the input domain name, when BIND is compiled
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with IDN support.
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</para>
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</listitem>
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</itemizedlist>
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</section>
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<section xml:id="relnotes_bugs"><info><title>Bug Fixes</title></info>
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<itemizedlist>
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<listitem>
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<para>
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Attempting to validate improperly unsigned CNAME responses
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from secure zones could cause a validator loop. This caused
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a delay in returning SERVFAIL and also increased the chances
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of encountering the crash bug described in CVE-2017-3145.
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[RT #46839]
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</para>
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</listitem>
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<listitem>
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<para>
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When <command>named</command> was reconfigured, failure of some
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zones to load correctly could leave the system in an inconsistent
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state; while generally harmless, this could lead to a crash later
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when using <command>rndc addzone</command>. Reconfiguration changes
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are now fully rolled back in the event of failure. [RT #45841]
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</para>
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</listitem>
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<listitem>
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<para>
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Fixed a bug that was introduced in an earlier development
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release which caused multi-packet AXFR and IXFR messages to fail
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validation if not all packets contained TSIG records; this
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caused interoperability problems with some other DNS
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implementations. [RT #45509]
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</para>
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</listitem>
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<listitem>
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<para>
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Reloading or reconfiguring <command>named</command> could
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fail on some platforms when LMDB was in use. [RT #45203]
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</para>
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</listitem>
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<listitem>
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<para>
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Due to some incorrectly deleted code, when BIND was
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built with LMDB, zones that were deleted via
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<command>rndc delzone</command> were removed from the
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running server but were not removed from the new zone
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database, so that deletion did not persist after a
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server restart. This has been corrected. [RT #45185]
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</para>
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</listitem>
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<listitem>
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<para>
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Semicolons are no longer escaped when printing CAA and
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URI records. This may break applications that depend on the
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presence of the backslash before the semicolon. [RT #45216]
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</para>
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</listitem>
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<listitem>
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<para>
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AD could be set on truncated answer with no records present
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in the answer and authority sections. [RT #45140]
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</para>
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</listitem>
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<listitem>
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<para>
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Some header files included <isc/util.h> incorrectly as
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it pollutes with namespace with non ISC_ macros and this should
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only be done by explicitly including <isc/util.h>. This
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has been corrected. Some code may depend on <isc/util.h>
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being implicitly included via other header files. Such
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code should explicitly include <isc/util.h>.
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</para>
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</listitem>
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<listitem>
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<para>
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Zones created with <command>rndc addzone</command> could
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temporarily fail to inherit the <command>allow-transfer</command>
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ACL set in the <command>options</command> section of
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<filename>named.conf</filename>. [RT #46603]
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</para>
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</listitem>
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<listitem>
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<para>
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<command>named</command> failed to properly determine whether
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there were active KSK and ZSK keys for an algorithm when
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<command>update-check-ksk</command> was true (which is the
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default setting). This could leave records unsigned
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when rolling keys. [RT #46743] [RT #46754] [RT #46774]
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</para>
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</listitem>
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</itemizedlist>
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</section>
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<section xml:id="end_of_life"><info><title>End of Life</title></info>
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<para>
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BIND 9.11 (Extended Support Version) will be supported until at
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least December, 2021.
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See <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.isc.org/downloads/software-support-policy/">https://www.isc.org/downloads/software-support-policy/</link> for details of ISC's software support policy.
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</para>
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</section>
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<section xml:id="relnotes_thanks"><info><title>Thank You</title></info>
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<para>
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Thank you to everyone who assisted us in making this release possible.
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If you would like to contribute to ISC to assist us in continuing to
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make quality open source software, please visit our donations page at
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<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://www.isc.org/donate/">http://www.isc.org/donate/</link>.
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</para>
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</section>
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</section>
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