Release Notes for BIND Version 9.11.2rc1

Introduction

   This document summarizes changes since the last production release on
   the BIND 9.11 branch. Please see the CHANGES file for a further list of
   bug fixes and other changes.

Download

   The latest versions of BIND 9 software can always be found at
   [1]http://www.isc.org/downloads/. There you will find additional
   information about each release, source code, and pre-compiled versions
   for Microsoft Windows operating systems.

New DNSSEC Root Key

   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 managed-keys statement, or if the pre-configured
   root key is enabled by using dnssec-validation auto, 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 trusted-keys statement are not
   automatically maintained. If your server is performing DNSSEC
   validation and is configured using trusted-keys, 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.

   This release includes an updated version of the bind.keys file
   containing the new root key. This file can also be downloaded from
   [2]https://www.isc.org/bind-keys .

License Change

   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).

   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.

   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.

   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 [3]https://www.isc.org/mission/contact/.

Security Fixes

     * 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]
     * 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]
     * With certain RPZ configurations, a response with TTL 0 could cause
       named to go into an infinite query loop. This flaw is disclosed in
       CVE-2017-3140. [RT #45181]

Feature Changes

     * dig +ednsopt now accepts the names for EDNS options in addition to
       numeric values. For example, an EDNS Client-Subnet option could be
       sent using dig +ednsopt=ecs:.... Thanks to John Worley of Secure64
       for the contribution. [RT #44461]
     * Threads in named 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 ps
       and top, but not the main thread. [RT #43234]
     * DiG now warns about .local queries which are reserved for Multicast
       DNS. [RT #44783]

Bug Fixes

     * Reloading or reconfiguring named could fail on some platforms when
       LMDB was in use. [RT #45203]
     * Due to some incorrectly deleted code, when BIND was built with
       LMDB, zones that were deleted via rndc delzone 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]
     * 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]
     * AD could be set on truncated answer with no records present in the
       answer and authority sections. [RT #45140]

End of Life

   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.
   [4]https://www.isc.org/downloads/software-support-policy/

Thank You

   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
   [5]http://www.isc.org/donate/.

References

   1. http://www.isc.org/downloads/
   2. https://www.isc.org/bind-keys
   3. https://www.isc.org/mission/contact/
   4. https://www.isc.org/downloads/software-support-policy/
   5. http://www.isc.org/donate/