Introduction

  BIND 9.6-ESV-R8b1 is the first beta release of BIND 9.6-ESV-R8.

  BIND 9.6-ESV is an Extended Support Version of BIND.

  This document summarizes changes from BIND 9.6-ESV-R7 to BIND
  9.6-ESV-R8b1.  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/services/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.
    [CVE-2012-3817]  [RT #30025]

  - A condition has been corrected where improper handling of
    zero-length RDATA could cause undesirable behavior, including
    termination of the named process. [CVE-2012-1667] [RT #29644]

New Features

  - None

Feature Changes

  - Improves OpenSSL error logging [RT #29932]

  - nslookup now returns a nonzero exit code when it is unable
    to get an answer.  [RT #29492]

Bug Fixes

  - Ensures that servers are expired from the ADB cache when the
    timeout limit is reached so that their learned attributes can
    be refreshed.  Prior to this change, servers that were
    frequently queried might never have their entries removed and
    reinitialized.  This is of particular importance to
    DNSSEC-validating recursive servers that might erroneously
    set "no-edns" for an authoritative server following a period
    of intermittent connectivity. [RT #29856]

  - Adds additional resilience to a previous security change
    (3218) by preventing RRSIG data from being added to cache
    when a pseudo-record matching the covering type and proving
    non-existence exists at a higher trust level. The earlier
    change prevented this inconsistent data from being retrieved
    from cache in response to client queries  - with this additional
    change, the RRSIG records are no longer inserted into cache
    at all. [RT #26809]

  - The tests on random jitter values that are used when handling
    zone refreshes have been relaxed. Prior to this change named
    could terminate unexpectedly when processing stub zones. [RT#
    29821]

  - 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]

  - It is now possible to using multiple control keys again -
    this functionality was inadvertently broken by change #3924
    (RT #28265) which addressed a memory leak. [RT #29694]

  - Setting resolver-query-timeout too low could cause named
    problems recovering after a loss of connectivity.  [RT #29623]

  - Reduces the potential build-up of stale RRsets in cache on a
    busy recursive nameserver by re-using cached DS and RRSIG
    rrsets when possible [RT #29446]

  - Upper-case/lower-case handling of RRSIG signer-names is now
    handled consistently: RRSIG records are generated with the
    signer-name in lower case. They are accepted with any case,
    but if they fail to validate, we try again in lower case. [RT
    #27451]

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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