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<section xmlns:db="http://docbook.org/ns/docbook" version="5.0"><info/>

<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="noteversion.xml"/>

<section xml:id="relnotes_intro"><info><title>Introduction</title></info>

<para>

This document summarizes changes since the last production

release on the BIND 9.11 branch.

Please see the <filename>CHANGES</filename> file for a further

list of bug fixes and other changes.

</para>

</section>

<section xml:id="relnotes_download"><info><title>Download</title></info>

<para>

The latest versions of BIND 9 software can always be found at

<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://www.isc.org/downloads/">http://www.isc.org/downloads/</link>.

There you will find additional information about each release,

source code, and pre-compiled versions for Microsoft Windows

operating systems.

</para>

</section>

<section xml:id="root_key"><info><title>New DNSSEC Root Key</title></info>

<para>

ICANN is in the process of introducing a new Key Signing Key (KSK) for

the global root zone. BIND has multiple methods for managing DNSSEC

trust anchors, with somewhat different behaviors. If the root

key is configured using the <command>managed-keys</command>

statement, or if the pre-configured root key is enabled by using

<command>dnssec-validation auto</command>, then BIND can keep

keys up to date automatically. Servers configured in this way

will roll seamlessly to the new key when it is published in

the root zone. However, keys configured using the

<command>trusted-keys</command> statement are not automatically

maintained. If your server is performing DNSSEC validation

and is configured using <command>trusted-keys</command>, you are

advised to change your configuration before the root zone begins

signing with the new KSK. This is currently scheduled for

October 11, 2017.

</para>

<para>

This release includes an updated version of the

<filename>bind.keys</filename> file containing the new root

key. This file can also be downloaded from

<link xmlns:xlink="http://www.w3.org/1999/xlink"

xlink:href="https://www.isc.org/bind-keys">

https://www.isc.org/bind-keys

</link>.

</para>

</section>

<section xml:id="relnotes_license"><info><title>License Change</title></info>

<para>

With the release of BIND 9.11.0, ISC changed to the open

source license for BIND from the ISC license to the Mozilla

Public License (MPL 2.0).

</para>

<para>

The MPL-2.0 license requires that if you make changes to

licensed software (e.g. BIND) and distribute them outside

your organization, that you publish those changes under that

same license. It does not require that you publish or disclose

anything other than the changes you made to our software.

</para>

<para>

This new requirement will not affect anyone who is using BIND

without redistributing it, nor anyone redistributing it without

changes, therefore this change will be without consequence

for most individuals and organizations who are using BIND.

</para>

<para>

Those unsure whether or not the license change affects their

use of BIND, or who wish to discuss how to comply with the

license may contact ISC at <link

xmlns:xlink="http://www.w3.org/1999/xlink"

xlink:href="https://www.isc.org/mission/contact/">

https://www.isc.org/mission/contact/</link>.

</para>

</section>

<section xml:id="relnotes_security"><info><title>Security Fixes</title></info>

<itemizedlist>

<listitem>

<para>

The BIND installer on Windows used an unquoted service path,

which can enable privilege escalation. This flaw is disclosed

in CVE-2017-3141. [RT #45229]

</para>

</listitem>

<listitem>

<para>

With certain RPZ configurations, a response with TTL 0

could cause <command>named</command> to go into an infinite

query loop. This flaw is disclosed in CVE-2017-3140.

[RT #45181]

</para>

</listitem>

</itemizedlist>

</section>

<section xml:id="relnotes_changes"><info><title>Feature Changes</title></info>

<itemizedlist>

<listitem>

<para>

<command>dig +ednsopt</command> now accepts the names

for EDNS options in addition to numeric values. For example,

an EDNS Client-Subnet option could be sent using

<command>dig +ednsopt=ecs:...</command>. Thanks to

John Worley of Secure64 for the contribution. [RT #44461]

</para>

</listitem>

<listitem>

<para>

Threads in <command>named</command> are now set to human-readable

names to assist debugging on operating systems that support that.

Threads will have names such as "isc-timer", "isc-sockmgr",

"isc-worker0001", and so on. This will affect the reporting of

subsidiary thread names in <command>ps</command> and

<command>top</command>, but not the main thread. [RT #43234]

</para>

</listitem>

</itemizedlist>

</section>

<section xml:id="relnotes_bugs"><info><title>Bug Fixes</title></info>

<itemizedlist>

<listitem>

<para>

Due to some incorrectly deleted code, when BIND was

built with LMDB, zones that were deleted via

<command>rndc delzone</command> were removed from the

running server but were not removed from the new zone

database, so that deletion did not persist after a

server restart. This has been corrected. [RT #45185]

</para>

</listitem>

<listitem>

<para>

Semicolons are no longer escaped when printing CAA and

URI records. This may break applications that depend on the

presence of the backslash before the semicolon. [RT #45216]

</para>

</listitem>

</itemizedlist>

</section>

<section xml:id="end_of_life"><info><title>End of Life</title></info>

<para>

The end of life for BIND 9.11 is yet to be determined but

will not be before BIND 9.13.0 has been released for 6 months.

<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>

</para>

</section>

<section xml:id="relnotes_thanks"><info><title>Thank You</title></info>

<para>

Thank you to everyone who assisted us in making this release possible.

If you would like to contribute to ISC to assist us in continuing to

make quality open source software, please visit our donations page at

<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://www.isc.org/donate/">http://www.isc.org/donate/</link>.

</para>

</section>

</section>