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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 BIND 9.9.11.
    </para>
    <para>
      BIND 9.9.11-P1 addresses the security issue described in
      CVE-2017-3145.
    </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 should have
      begun the process of rolling to the new key when it was published in
      the root zone in July 2017. 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="win_support"><info><title>Windows XP No Longer Supported</title></info>
    <para>
      As of BIND 9.9.11, Windows XP is no longer a supported platform for
      BIND, and Windows XP binaries are no longer available for download
      from ISC.
    </para>
  </section>

  <section xml:id="relnotes_security"><info><title>Security Fixes</title></info>
    <itemizedlist>
      <listitem>
	<para>
	  Addresses could be referenced after being freed during resolver
	  processing, causing an assertion failure. The chances of this
	  happening were remote, but the introduction of a delay in
	  resolution increased them. (The delay will be addressed in
	  an upcoming maintenance release.) This bug is disclosed in
	  CVE-2017-3145. [RT #46839]
	</para>
      </listitem>
      <listitem>
	<para>
	  An error in TSIG handling could permit unauthorized zone
	  transfers or zone updates. These flaws are disclosed in
	  CVE-2017-3142 and CVE-2017-3143. [RT #45383]
	</para>
      </listitem>
      <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>
	  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>
      <listitem>
	<para>
	  DiG now warns about .local queries which are reserved for
	  Multicast DNS. [RT #44783]
	</para>
      </listitem>
    </itemizedlist>
  </section>

  <section xml:id="relnotes_bugs"><info><title>Bug Fixes</title></info>
    <itemizedlist>
      <listitem>
	<para>
	  Fixed a bug that was introduced in an earlier development
	  release which caused multi-packet AXFR and IXFR messages to fail
	  validation if not all packets contained TSIG records; this
	  caused interoperability problems with some other DNS
	  implementations. [RT #45509]
	</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>
      <listitem>
	<para>
	  AD could be set on truncated answer with no records present
	  in the answer and authority sections. [RT #45140]
	</para>
      </listitem>
    </itemizedlist>
  </section>

  <section xml:id="end_of_life"><info><title>End of Life</title></info>
    <para>
      BIND 9.9 (Extended Support Version) will be supported until
      at least June, 2018.
      <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>
