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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 significant changes since the last
      production release of BIND on the corresponding major release
      branch.
      Please see the CHANGES 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="relnotes_security"><info><title>Security Fixes</title></info>
    <itemizedlist>
      <listitem>
	<para>
	  <command>named</command> could mishandle authority sections
	  with missing RRSIGs, triggering an assertion failure. This
	  flaw is disclosed in CVE-2016-9444. [RT #43632]
	</para>
      </listitem>
      <listitem>
	<para>
	  <command>named</command> mishandled some responses where
	  covering RRSIG records were returned without the requested
	  data, resulting in an assertion failure. This flaw is
	  disclosed in CVE-2016-9147. [RT #43548]
	</para>
      </listitem>
      <listitem>
	<para>
	  <command>named</command> incorrectly tried to cache TKEY
	  records which could trigger an assertion failure when there was
	  a class mismatch. This flaw is disclosed in CVE-2016-9131.
	  [RT #43522]
        </para>
      </listitem>
      <listitem>
	<para>
	  It was possible to trigger assertions when processing
	  responses containing answers of type DNAME. This flaw is
	  disclosed in CVE-2016-8864. [RT #43465]
	</para>
      </listitem>
      <listitem>
	<para>
	  Added the ability to specify the maximum number of records
	  permitted in a zone (<option>max-records #;</option>).
	  This provides a mechanism to block overly large zone
	  transfers, which is a potential risk with slave zones from
	  other parties, as described in CVE-2016-6170.
	  [RT #42143]
	</para>
      </listitem>
      <listitem>
	<para>
	  It was possible to trigger an assertion when rendering a
	  message using a specially crafted request. This flaw is
	  disclosed in CVE-2016-2776. [RT #43139]
	</para>
      </listitem>
      <listitem>
	<para>
	  Calling <command>getrrsetbyname()</command> with a non-
	  absolute name could trigger an infinite recursion bug in
	  <command>lwresd</command> or <command>named</command> with
	  <command>lwres</command> configured if, when combined with
	  a search list entry from <filename>resolv.conf</filename>,
	  the resulting name is too long.  This flaw is disclosed in
	  CVE-2016-2775. [RT #42694]
	</para>
      </listitem>
    </itemizedlist>
  </section>

  <section xml:id="relnotes_changes"><info><title>Feature Changes</title></info>
    <itemizedlist>
      <listitem>
	<para>
	  The ISC DNSSEC Lookaside Validation (DLV) service is scheduled
	  to be disabled in 2017.  A warning is now logged when
	  <command>named</command> is configured to use this service,
	  either explicitly or via <option>dnssec-lookaside auto;</option>.
	  [RT #42207]
	</para>
      </listitem>
      <listitem>
	<para>
	  If an ACL is specified with an address prefix in which the
	  prefix length is longer than the address portion (for example,
	  192.0.2.1/8), <command>named</command> will now log a warning.
	  In future releases this will be a fatal configuration error.
	  [RT #43367]
	</para>
      </listitem>
    </itemizedlist>
  </section>

  <section xml:id="relnotes_bugs"><info><title>Bug Fixes</title></info>
    <itemizedlist>
      <listitem>
	<para>
	  Windows installs were failing due to triggering UAC without
	  the installation binary being signed.
	</para>
      </listitem>
      <listitem>
	<para>
	  A change in the internal binary representation of the RBT database
	  node structure enabled a race condition to occur (especially when
	  BIND was built with certain compilers or optimizer settings),
	  leading to inconsistent database state which caused random
	  assertion failures. [RT #42380]
	</para>
      </listitem>
      <listitem>
	<para>
	  Referencing a nonexistent zone in a <command>response-policy</command>
	  statement could cause an assertion failure during configuration.
	  [RT #43787]
	</para>
      </listitem>
      <listitem>
	<para>
	  <command>rndc addzone</command> could cause a crash
	  when attempting to add a zone with a type other than
	  <command>master</command> or <command>slave</command>.
	  Such zones are now rejected. [RT #43665]
	</para>
      </listitem>
      <listitem>
	<para>
	  <command>named</command> could hang when encountering log
	  file names with large apparent gaps in version number (for
	  example, when files exist called "logfile.0", "logfile.1",
	  and "logfile.1482954169").  This is now handled correctly.
	  [RT #38688]
	</para>
      </listitem>
      <listitem>
	<para>
	  If a zone was updated while <command>named</command> was
	  processing a query for nonexistent data, it could return
	  out-of-sync NSEC3 records causing potential DNSSEC validation
	  failure. [RT #43247]
	</para>
      </listitem>
      <listitem>
	<para>
	  <command>named</command> could crash when loading a zone
	  which had RRISG records whose expiry fields were far enough
	  apart to cause an integer overflow when comparing them.
	  [RT #40571]
	</para>
      </listitem>
      <listitem>
	<para>
	  The <command>arpaname</command> command was not installed into
	  the correct <command>prefix</command><filename>/bin</filename>
	  directory. [RT #42910]
	</para>
      </listitem>
      <listitem>
	<para>
	  When receiving a response from an authoritative server with
	  a TTL value of zero, <command>named></command> will now only use
	  that response once, to answer the currently active clients that
	  were waiting for it. Previously, such response could be cached
	  and reused for up to one second. [RT #42142]
	</para>
      </listitem>
      <listitem>
	<para>
	  Corrected a bug in the <command>rndc</command> control channel
	  that could allow a read past the end of a buffer, crashing
	  <command>named</command>. Thanks to Lian Yihan for reporting
	  this error.
	</para>
      </listitem>
      <listitem>
	<para>
	  Reverted a change to the query logging format that was
	  inadvertently backported from the 9.11 branch. [RT #43238]
	</para>
      </listitem>
    </itemizedlist>
  </section>

  <section xml:id="relnotes_maint"><info><title>Maintenance</title></info>
    <itemizedlist>
      <listitem>
	<para>
	  The built-in root hints have been updated to include
	  IPv6 addresses for B.ROOT-SERVERS.NET (2001:500:84::b),
	  E.ROOT-SERVERS.NET (2001:500:a8::e) and
	  G.ROOT-SERVERS.NET (2001:500:12::d0d).
	</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
      December, 2017.
      <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>
