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Evan HuntandOndřej Surý 87344e3493 prepare 9.12.1rc1
2018-06-21 18:46:32 +02:00

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<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="id-1.2"></a>Release Notes for BIND Version 9.12.2rc1</h2></div></div></div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="relnotes_intro"></a>Introduction</h3></div></div></div>
<p>
This document summarizes changes since the last production
release on the BIND 9.12 branch. Please see the
<code class="filename">CHANGES</code> for a further list of bug fixes
and other changes.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="relnotes_download"></a>Download</h3></div></div></div>
<p>
The latest versions of BIND 9 software can always be found at
<a class="link" href="http://www.isc.org/downloads/" target="_top">http://www.isc.org/downloads/</a>.
There you will find additional information about each release,
source code, and pre-compiled versions for Microsoft Windows
operating systems.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="relnotes_security"></a>Security Fixes</h3></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<p>
When recursion is enabled but the <span class="command"><strong>allow-recursion</strong></span>
and <span class="command"><strong>allow-query-cache</strong></span> ACLs are not specified, they
should be limited to local networks, but they were inadvertently set
to match the default <span class="command"><strong>allow-query</strong></span>, thus allowing
remote queries. This flaw is disclosed in CVE-2018-5738. [GL #309]
</p>
</li>
<li class="listitem">
<p>
The serve-stale feature could cause an assertion failure in
rbtdb.c even when stale-answer-enable was false. The
simultaneous use of stale cache records and NSEC aggressive
negative caching could trigger a recursion loop in the
<span class="command"><strong>named</strong></span> process. This flaw is disclosed in
CVE-2018-5737. [GL #185]
</p>
</li>
<li class="listitem">
<p>
A bug in zone database reference counting could lead to a crash
when multiple versions of a slave zone were transferred from a
master in close succession. This flaw is disclosed in
CVE-2018-5736. [GL #134]
</p>
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="relnotes_features"></a>New Features</h3></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<p>
<span class="command"><strong>update-policy</strong></span> rules that otherwise ignore the
name field now require that it be set to "." to ensure that any
type list present is properly interpreted. Previously, if the
name field was omitted from the rule declaration but a type list
was present, it wouldn't be interpreted as expected.
</p>
</li>
<li class="listitem">
<p>
<span class="command"><strong>named</strong></span> now supports the "root key sentinel"
mechanism. This enables validating resolvers to indicate
which trust anchors are configured for the root, so that
information about root key rollover status can be gathered.
To disable this feature, add
<span class="command"><strong>root-key-sentinel no;</strong></span> to
<code class="filename">named.conf</code>. [GL #37]
</p>
</li>
<li class="listitem">
<p>
Add the ability to not return a DNS COOKIE option when one
is present in the request. To prevent a cookie being returned
add 'answer-cookie no;' to named.conf. [GL #173]
</p>
<p>
<span class="command"><strong>answer-cookie</strong></span> is only available as a
temporary measure, for use when <span class="command"><strong>named</strong></span>
shares an IP address with other servers that do not yet
support DNS COOKIE. A mismatch between servers on the
same address is not expected to cause operational problems,
but the option to disable COOKIE responses so that all
servers have the same behavior is provided out of an
abundance of caution. DNS COOKIE is an important security
mechanism and should not be disabled unless absolutely
necessary. The <span class="command"><strong>answer-cookie</strong></span> option
is obsolete as of BIND 9.13.
</p>
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="relnotes_changes"></a>Feature Changes</h3></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<p>
<span class="command"><strong>named</strong></span> will now log a warning if the old
root DNSSEC key is explicitly configured and has not been updated.
[RT #43670]
</p>
</li>
<li class="listitem">
<p>
BIND now can be compiled against libidn2 library to add
IDNA2008 support. Previously BIND only supported IDNA2003
using (now obsolete) idnkit-1 library.
</p>
</li>
<li class="listitem">
<p>
<span class="command"><strong>dig +noidnin</strong></span> can be used to disable IDN
processing on the input domain name, when BIND is compiled
with IDN support.
</p>
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="relnotes_bugs"></a>Bug Fixes</h3></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<p>
When answering authoritative queries, <span class="command"><strong>named</strong></span>
does not return the target of a cross-zone CNAME between two
locally served zones; this prevents accidental cache poisoning.
This same restriction was incorrectly applied to recursive
queries as well; this has been fixed. [RT #47078]
</p>
</li>
<li class="listitem">
<p>
<span class="command"><strong>named</strong></span> could crash when acting as a slave for a
catalog zone if zone contained a master definition without an IP
address. [RT #45999]
</p>
</li>
<li class="listitem">
<p>
<span class="command"><strong>named</strong></span> could crash due to a race condition when
rolling <span class="command"><strong>dnstap</strong></span> log files. [RT #46942]
</p>
</li>
<li class="listitem">
<p>
<span class="command"><strong>rndc reload</strong></span> could cause <span class="command"><strong>named</strong></span>
to leak memory if it was invoked before the zone loading actions
from a previous <span class="command"><strong>rndc reload</strong></span> command were
completed. [RT #47076]
</p>
</li>
<li class="listitem">
<p>
<span class="command"><strong>named</strong></span> could crash when rolling a
<span class="command"><strong>dnstap</strong></span> log file. [RT #46942]
</p>
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="relnotes_license"></a>License</h3></div></div></div>
<p>
BIND is open source software licenced under the terms of the Mozilla
Public License, version 2.0 (see the <code class="filename">LICENSE</code>
file for the full text).
</p>
<p>
The license requires that if you make changes to BIND and distribute
them outside your organization, those changes must be published under
the same license. It does not require that you publish or disclose
anything other than the changes you have made to our software. This
requirement does not affect anyone who is using BIND, with or without
modifications, without redistributing it, nor anyone redistributing
BIND without changes.
</p>
<p>
Those wishing to discuss license compliance may contact ISC at
<a class="link" href="https://www.isc.org/mission/contact/" target="_top">
https://www.isc.org/mission/contact/</a>.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="end_of_life"></a>End of Life</h3></div></div></div>
<p>
The end-of-life date for BIND 9.12 has not yet been determined.
However, it is not intended to be an Extended Support Version (ESV)
branch; accordingly, support will end after the next stable
branch (9.14) becomes available. Those needing a longer-lived
branch are encouraged to use the current ESV, BIND 9.11, which
will be supported until December 2021. See
<a class="link" href="https://www.isc.org/downloads/software-support-policy/" target="_top">https://www.isc.org/downloads/software-support-policy/</a>
for details of ISC's software support policy.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="relnotes_thanks"></a>Thank You</h3></div></div></div>
<p>
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
<a class="link" href="http://www.isc.org/donate/" target="_top">http://www.isc.org/donate/</a>.
</p>
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