BIND 9.7.6-P2 is now available

[Cathy Almond]

Introduction

  BIND 9.7.6-P2 is the latest production release of BIND 9.7.

  This document summarizes changes from BIND 9.7.5 to BIND 9.7.6-P2.
  Please see the CHANGES file in the source code release for a
  complete list of all changes.

Download

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

Support

  Product support information is available on http://www.isc.org/support
  for paid support options.  Free support is provided by our user
  community via a mailing list.  Information on all public email
  lists is available at https://lists.isc.org/mailman/listinfo.

Security Fixes

- Prevents a named assert (crash) when validating caused by using
  "Bad cache" data before it has been initialized.  [RT #30025]

- A condition has been corrected where improper handling of zero-length
  RDATA could cause undesirable behavior, including termination of
  the named process.  [RT #29644]

New Features

- None

Feature Changes

- BIND now recognizes the TLSA resource record type, created to
  support IETF DANE (DNS-based Authentication of Named Entities)
  [RT #28989]

Bug Fixes

- Fixes the defect introduced by change #3314 that was causing
  failures when saving stub zones to disk (resulting in excessive
  CPU usage in some cases).  [RT #29952]

- The locking strategy around the handling of iterative queries has
  been tuned to reduce unnecessary contention in a multi-threaded
  environment.  (Note that this may not provide a measurable
  improvement over previous versions of BIND, but it corrects the
  performance impact of change 3309 / RT #27995) [RT #29239]

- Addresses a race condition that can cause named to to crash when
  the masters list for a zone is updated via rndc reload/reconfig
  [RT #26732]

- Fixes a race condition in zone.c that can cause named to crash
  during the processing of rndc delzone [RT #29028]

- Prevents a named segfault from resolver.c due to procedure
  fctx_finddone() not being thread-safe.  [RT #27995]

- Uses hmctx, not mctx when freeing rbtdb->heaps to avoid triggering
  an assertion when flushing cache data. [RT #28571]

- Resolves inconsistencies in locating DNSSEC keys where zone names
  contain characters that require special mappings [RT #28600]

- A new flag -R  has been added to queryperf for running tests using
  non-recursive queries.  It also now builds correctly on MacOS
  version 10.7 (darwin)  [RT #28565]

- Named no longer crashes if gssapi is enabled in named.conf but
  was not compiled into the binary [RT #28338]

- SDB now handles unexpected errors from back-end database drivers
  gracefully instead of exiting on an assert. [RT #28534]

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 http://www.isc.org/supportisc.

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