Release Notes for BIND Version 9.10.2-P2

Introduction

   This document summarizes changes since BIND 9.10.2:

   BIND 9.10.2-P2 addresses a security issue described in CVE-2015-4620.

   BIND 9.10.2-P1 addressed several bugs that have been identified in the
   BIND 9.10 implementation of response-policy zones (RPZ). The bugs are
   in code which optimizes searching through multiple policy zones. In
   some cases, they can cause RPZ to behave inefficiently by searching for
   query matches in more policy zones than are strictly necessary, or to
   behave unpredictably by failing to search a policy zone that should
   have been searched. In the worst case, they can lead to assertion
   failures, terminating named.

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

     * On servers configured to perform DNSSEC validation an assertion
       failure could be triggered on answers from a specially configured
       server.
       This flaw was discovered by Breno Silveira Soares, and is disclosed
       in CVE-2015-4620. [RT #39795]

New Features

     * None

Feature Changes

     * None

Bug Fixes

     * Asynchronous zone loads were not handled correctly when the zone
       load was already in progress; this could trigger a crash in zt.c.
       [RT #37573]
     * Several bugs have been fixed in the RPZ implementation:
          + Policy zones that did not specifically require recursion could
            be treated as if they did; consequently, setting
            qname-wait-recurse no; was sometimes ineffective. This has
            been corrected. In most configurations, behavioral changes due
            to this fix will not be noticeable. [RT #39229]
          + The server could crash if policy zones were updated (e.g. via
            rndc reload or an incoming zone transfer) while RPZ processing
            was still ongoing for an active query. [RT #39415]
          + On servers with one or more policy zones configured as slaves,
            if a policy zone updated during regular operation (rather than
            at startup) using a full zone reload, such as via AXFR, a bug
            could allow the RPZ summary data to fall out of sync,
            potentially leading to an assertion failure in rpz.c when
            further incremental updates were made to the zone, such as via
            IXFR. [RT #39567]
          + The server could match a shorter prefix than what was
            available in CLIENT-IP policy triggers, and so, an unexpected
            action could be taken. This has been corrected. [RT #39481]
          + The server could crash if a reload of an RPZ zone was
            initiated while another reload of the same zone was already in
            progress. [RT #39649]

End of Life

   The end of life for BIND 9.10 is yet to be determined but will not be
   before BIND 9.12.0 has been released for 6 months.
   [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/