Release Notes for BIND Version 9.9.10b1

Introduction

   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.

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.

Security Fixes

     * named could mishandle authority sections with missing RRSIGs,
       triggering an assertion failure. This flaw is disclosed in
       CVE-2016-9444. [RT #43632]
     * named 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]
     * named 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]
     * It was possible to trigger assertions when processing responses
       containing answers of type DNAME. This flaw is disclosed in
       CVE-2016-8864. [RT #43465]
     * Added the ability to specify the maximum number of records
       permitted in a zone (max-records #;). 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]
     * 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]
     * Calling getrrsetbyname() with a non- absolute name could trigger an
       infinite recursion bug in lwresd or named with lwres configured if,
       when combined with a search list entry from resolv.conf, the
       resulting name is too long. This flaw is disclosed in
       CVE-2016-2775. [RT #42694]

Feature Changes

     * The ISC DNSSEC Lookaside Validation (DLV) service is scheduled to
       be disabled in 2017. A warning is now logged when named is
       configured to use this service, either explicitly or via
       dnssec-lookaside auto;. [RT #42207]
     * 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), named will now log a warning. In future releases this
       will be a fatal configuration error. [RT #43367]

Bug Fixes

     * Windows installs were failing due to triggering UAC without the
       installation binary being signed.
     * 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]
     * Referencing a nonexistent zone in a response-policy statement could
       cause an assertion failure during configuration. [RT #43787]
     * rndc addzone could cause a crash when attempting to add a zone with
       a type other than master or slave. Such zones are now rejected. [RT
       #43665]
     * named 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]
     * If a zone was updated while named was processing a query for
       nonexistent data, it could return out-of-sync NSEC3 records causing
       potential DNSSEC validation failure. [RT #43247]
     * named 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]
     * The arpaname command was not installed into the correct prefix/bin
       directory. [RT #42910]
     * When receiving a response from an authoritative server with a TTL
       value of zero, named> 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]
     * Corrected a bug in the rndc control channel that could allow a read
       past the end of a buffer, crashing named. Thanks to Lian Yihan for
       reporting this error.
     * Reverted a change to the query logging format that was
       inadvertently backported from the 9.11 branch. [RT #43238]

Maintenance

     * 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).

End of Life

   BIND 9.9 (Extended Support Version) will be supported until December,
   2017. [2]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
   [3]http://www.isc.org/donate/.

References

   1. http://www.isc.org/downloads/
   2. https://www.isc.org/downloads/software-support-policy/
   3. http://www.isc.org/donate/