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120 lines
4.5 KiB
ReStructuredText
..
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Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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This Source Code Form is subject to the terms of the Mozilla Public
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License, v. 2.0. If a copy of the MPL was not distributed with this
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file, you can obtain one at https://mozilla.org/MPL/2.0/.
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See the COPYRIGHT file distributed with this work for additional
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information regarding copyright ownership.
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Notes for BIND 9.17.12
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----------------------
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Security Fixes
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~~~~~~~~~~~~~~
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- A malformed incoming IXFR transfer could trigger an assertion failure
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in ``named``, causing it to quit abnormally. (CVE-2021-25214)
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ISC would like to thank Greg Kuechle of SaskTel for bringing this
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vulnerability to our attention. [GL #2467]
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- ``named`` crashed when a DNAME record placed in the ANSWER section
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during DNAME chasing turned out to be the final answer to a client
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query. (CVE-2021-25215)
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ISC would like to thank `Siva Kakarla`_ for bringing this
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vulnerability to our attention. [GL #2540]
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.. _Siva Kakarla: https://github.com/sivakesava1
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Known Issues
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~~~~~~~~~~~~
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- None.
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New Features
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~~~~~~~~~~~~
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- None.
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Removed Features
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~~~~~~~~~~~~~~~~
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- None.
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Feature Changes
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~~~~~~~~~~~~~~~
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- The GSSAPI no longer uses the ISC implementation of the SPNEGO
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mechanism and instead relies on the SPNEGO implementation from the
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system Kerberos library. All major Kerberos libraries contain the
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SPNEGO mechanism implementation. This change was implemented in BIND
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9.17.2, but it was not included in the release notes at the time.
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[GL #2607]
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- The default value for the ``stale-answer-client-timeout`` option was
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changed from ``1800`` (ms) to ``off``. The default value may be
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changed again in future releases as this feature matures. [GL #2608]
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- Implement ``draft-vandijk-dnsop-nsec-ttl``, NSEC(3) TTL values are now set to
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the minimum of the SOA MINIMUM value and the SOA TTL. [GL #2347].
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- Reduce the supported maximum number of iterations that can be
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configured in an NSEC3 zones to 150. [GL #2642]
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Bug Fixes
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~~~~~~~~~
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- When calling ``rndc dnssec -rollover`` or ``rndc checkds -checkds``,
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``named`` now updates the keys immediately, avoiding unnecessary rollover
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delays. [#2488]
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- Dynamic zones with ``dnssec-policy`` that were frozen could not be thawed.
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This has been fixed. [GL #2523]
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- CDS/CDNSKEY DELETE records are now removed when a zone transitioned from
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secure to insecure. "named-checkzone" no longer complains if such records
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exist in an unsigned zone. [GL #2517]
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- Fix a crash when transferring a zone over TLS, after "named" previously
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skipped a master. [GL #2562]
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- It was discovered that the TCP idle and initial timeouts were incorrectly
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applied in the BIND 9.16 and 9.17 branches. Only the ``tcp-initial-timeout``
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was applied on the whole connection, even if the connection were still active,
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which could cause a large zone transfer to be sent back to the client. The
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default setting for ``tcp-initial-timeout`` was 30 seconds, which meant that
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any TCP connection taking more than 30 seconds was abruptly terminated. This
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has been fixed. [GL #2573]
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- When ``stale-answer-client-timeout`` was set to a positive value and
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recursion for a client query completed when ``named`` was about to look for
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a stale answer, an assertion could fail in ``query_respond()``, resulting in
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a crash. This has been fixed. [GL #2594]
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- After upgrading to the previous release, journal files for trust anchor
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databases (e.g., ``managed-keys.bind.jnl``) could be left in a corrupt
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state. (Other zone journal files were not affected.) This has been
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fixed. If a corrupt journal file is detected, ``named`` can now recover
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from it. [GL #2600]
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- When dumping the cache to file, TTLs were being increased with
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``max-stale-ttl``. Also the comment above stale RRsets could have nonsensical
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values if the RRset was still marked a stale but the ``max-stale-ttl`` has
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passed (and is actually an RRset awaiting cleanup). Both issues have now
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been fixed. [GL #389] [GL #2289]
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- ``named`` would overwrite a zone file unconditionally when it recovered from
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a corrupted journal. [GL #2623]
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- After the networking manager was introduced to ``named`` to handle
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incoming traffic, it was discovered that the recursive performance had been
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degraded compared to the previous version (9.11). This has been now fixed by
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running internal tasks inside the networking manager worker threads, so
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they do not compete for resources. [GL #2638]
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- With ``dnssec-policy``, when creating new keys also check for keyid conflicts
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between the new keys too. [GL #2628]
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