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Generate changelog for BIND 9.21.4
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Andoni Duarte Pintado
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@ -18,6 +18,7 @@ Changelog
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development. Regular users should refer to :ref:`Release Notes <relnotes>`
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for changes relevant to them.
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.. include:: ../changelog/changelog-9.21.4.rst
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.. include:: ../changelog/changelog-9.21.3.rst
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.. include:: ../changelog/changelog-9.21.2.rst
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.. include:: ../changelog/changelog-9.21.1.rst
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304
doc/changelog/changelog-9.21.4.rst
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doc/changelog/changelog-9.21.4.rst
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.. Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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..
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.. SPDX-License-Identifier: MPL-2.0
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..
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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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..
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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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BIND 9.21.4
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-----------
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Security Fixes
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~~~~~~~~~~~~~~
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- [CVE-2024-12705] DNS-over-HTTP(s) flooding fixes. ``bddaff32104``
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Fix DNS-over-HTTP(S) implementation issues that arise under heavy
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query load. Optimize resource usage for :iscman:`named` instances that
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accept queries over DNS-over-HTTP(S).
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Previously, :iscman:`named` would process all incoming HTTP/2 data at
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once, which could overwhelm the server, especially when dealing with
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clients that send requests but don't wait for responses. That has been
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fixed. Now, :iscman:`named` handles HTTP/2 data in smaller chunks and
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throttles reading until the remote side reads the response data. It
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also throttles clients that send too many requests at once.
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Additionally, :iscman:`named` now carefully processes data sent by
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some clients, which can be considered "flooding." It logs these
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clients and drops connections from them. :gl:`#4795`
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In some cases, :iscman:`named` could leave DNS-over-HTTP(S)
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connections in the `CLOSE_WAIT` state indefinitely. That also has been
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fixed. ISC would like to thank JF Billaud for thoroughly investigating
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the issue and verifying the fix. :gl:`#5083` :gl:`#4795` :gl:`#5083`
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- [CVE-2024-11187] Limit the additional processing for large RDATA sets.
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``4d054cca7a0``
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When answering queries, don't add data to the additional section if
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the answer has more than 13 names in the RDATA. This limits the number
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of lookups into the database(s) during a single client query, reducing
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query processing load. :gl:`#5034`
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New Features
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~~~~~~~~~~~~
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- Add Extended DNS Error Code 22 - No Reachable Authority.
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``3972eacdad2``
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When the resolver is trying to query an authority server and
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eventually timed out, a SERVFAIL answer is given to the client. Add
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the Extended DNS Error Code 22 - No Reachable Authority to the
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response. :gl:`#2268` :gl:`!9743`
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- Enable extraction of exact local socket addresses. ``44d5dbeab63``
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Enable extracting the exact address/port that a local wildcard/TCP
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socket is bound to, improving the accuracy of dnstap logging and
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providing more information in debug logs produced by system tests.
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Since this requires issuing an extra system call on some hot paths,
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this new feature is only enabled when the ``ISC_SOCKET_DETAILS``
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preprocessor macro is set at compile time. :gl:`#4344` :gl:`!8348`
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- Log both "from" and "to" socket in debug messages. ``6230bc883a5``
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Debug messages logging network traffic now include information about
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both sides of each communication channel rather than just one of them.
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:gl:`#4345` :gl:`!8349`
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- Add "Zone has [AAAA/A] records but is not served by IPv[6/4]"
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warnings. ``ef6dc36e530``
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Check that zones with AAAA records are served by IPv6 servers and that
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zones with A records are served by IPv4 servers. Sometimes, IPv6
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services are accidentally misconfigured and zones with IPv6 (AAAA)
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address records are not served by DNS servers with IPv6 addresses,
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which means they need to use translation devices to look up those IPv6
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addresses. The reverse is also sometimes true: zones with A records
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are not resolvable over IPv4 when they should be. To prevent this,
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BIND now looks for these misconfigured zones and issues a warning if
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they are found. :gl:`#4370` :gl:`!8393`
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- Add a new option to configure the maximum number of outgoing queries
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per client request. ``80a5745a1f8``
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The configuration option 'max-query-count' sets how many outgoing
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queries per client request is allowed. The existing
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'max-recursion-queries' is the number of permissible queries for a
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single name and is reset on every CNAME redirection. This new option
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is a global limit on the client request. The default is 200.
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This allows us to send a bit more queries while looking up a single
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name. The default for 'max-recursion-queries' is changed from 32 to
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50. :gl:`#4980` :gl:`#4921` :gl:`!9737`
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Removed Features
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~~~~~~~~~~~~~~~~
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- Remove dnssec-must-be-secure feature. ``f5f792f1ed2``
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:gl:`#4482` :gl:`!9851`
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- Remove 'sortlist' option. ``2bce06e170a``
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The `sortlist` option, which was deprecated in BIND 9.20, has now been
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removed. :gl:`#4665` :gl:`!9839`
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- Remove fixed value for the rrset-order option. ``5bee088dd1f``
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Remove the "fixed" value from the "rrset-order" option and from the
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autoconf script. :gl:`#4666` :gl:`!9852`
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- Remove the log message about incomplete IPv6 API. ``3779a81d501``
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The log message would not be ever reached, because the IPv6 API is
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always considered to be complete. Just remove the dead code.
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:gl:`#5068` :gl:`!9798`
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- Remove trusted-keys and managed-keys options. ``9de6b228d41``
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These options have been deprecated in 9.19 in favor of the
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'trust-anchors' option and are now being removed. :gl:`#5080`
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:gl:`!9855`
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- Drop single-use RETERR macro. ``f6ff4fff85e``
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If the RETERR define is only used once in a file, just drop the macro.
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:gl:`!9871`
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- Remove C++ support from the public header. ``8d9bc93e81e``
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Since BIND 9 headers are not longer public, there's no reason to keep
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the ISC_LANG_BEGINDECL and ISC_LANG_ENDDECL macros to support
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including them from C++ projects. :gl:`!9925`
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- Remove DLV remnants. ``f4377a3cd69``
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DLV is long gone, so we can remove design documentation around DLV,
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related command line options (that were already a hard failure), and
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some DLV related test remnants. :gl:`!9888`
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Feature Changes
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~~~~~~~~~~~~~~~
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- Update picohttpparser.{c,h} with upstream repository. ``9428077f481``
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:gl:`#4485` :gl:`!9857`
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- The configuration clauses parental-agents and primaries are renamed to
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remote-servers. ``858ba71eafc``
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The top blocks 'primaries' and 'parental-agents' are no longer
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preferred and should be renamed to 'remote-servers'. The zone
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statements 'parental-agents' and 'primaries' are still used, and may
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refer to any 'remote-servers' top block. :gl:`#4544` :gl:`!9822`
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- Add TLS SNI extension to all outgoing TLS connections. ``6eb77ed2b07``
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This change ensures that SNI extension is used in outgoing connections
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over TLS (e.g. for DoT and DoH) when applicable. :gl:`#5099`
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:gl:`!9923`
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- Detect and possibly define constexpr using Autoconf. ``1fea227ab8b``
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Previously, we had an ISC_CONSTEXPR macro that was expanded to either
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`constexpr` or `static const`, depending on compiler support. To make
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the code cleaner, move `constexpr` support detection to Autoconf; if
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`constexpr` support is missing from the compiler, define `constexpr`
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as `static const` in config.h. :gl:`!9924`
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- Remove unused maxquerycount. ``43622594f48``
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Related to #4980 :gl:`!9850`
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- Use query counters in validator code. ``63060314098``
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Commit af7db8951364a89c468eda1535efb3f53adc2c1f as part of #4141 was
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supposed to apply the 'max-recursion-queries' quota to validator
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queries, but the counter was never actually passed on to
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'dns_resolver_createfetch()'. This has been fixed, and the global
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query counter ('max-query-count', per client request) is now also
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added.
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Related to #4980 :gl:`!9856`
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Bug Fixes
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~~~~~~~~~
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- Accept resolv.conf with more than 8 search domains. ``eda02dc3424``
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:gl:`#1259` :gl:`!2446`
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- Fix nsupdate hang when processing a large update. ``fa56e0d8b10``
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To mitigate DNS flood attacks over a single TCP connection, we
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throttle the connection when the other side does not read the data.
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Throttling should only occur on server-side sockets, but erroneously
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also happened for nsupdate, which acts as a client. When nsupdate
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started throttling the connection, it never attempts to read again.
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This has been fixed. :gl:`#4910` :gl:`!9709`
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- Lock and attach when returning zone stats. ``3c720c64250``
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When returning zone statistics counters, the statistics sets are now
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attached while the zone is locked. This addresses Coverity warnings
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CID 468720, 468728 and 468729. :gl:`#4934` :gl:`!9488`
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- Fix possible assertion failure when reloading server while processing
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updates. ``be5266a7c61``
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:gl:`#5006` :gl:`!9745`
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- Preserve cache across reconfig when using attach-cache.
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``0b287f3aaf9``
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When the `attach-cache` option is used in the `options` block with an
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arbitrary name, it causes all views to use the same cache. Previously,
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this configuration caused the cache to be deleted and a new cache
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created every time the server was reconfigured. This has been fixed.
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:gl:`#5061` :gl:`!9787`
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- Resolve the spurious drops in performance due GLUE cache.
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``e2c1941efd2``
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For performance reasons, the returned GLUE records are cached on the
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first use. The current implementation could randomly cause a
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performance drop and increased memory use. This has been fixed.
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:gl:`#5064` :gl:`!9831`
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- Fix dnssec-signzone signing non-DNSKEY RRsets with revoked keys.
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``1435770b1a7``
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`dnssec-signzone` was using revoked keys for signing RRsets other than
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DNSKEY. This has been corrected. :gl:`#5070` :gl:`!9800`
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- Disable deterministic ecdsa for fips builds. ``707dded9798``
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FIPS 186-5 [1] allows the usage deterministic ECDSA (Section 6.3)
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which is compabile with RFC 6979 [2] but OpenSSL seems to follow FIPS
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186-4 (Section 6.3) [3] which only allows for random k values, failing
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k value generation for OpenSSL >=3.2. [4]
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Fix signing by not using deterministic ECDSA when FIPS mode is active.
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[1]: https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-5.pdf [2]:
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https://datatracker.ietf.org/doc/html/rfc6979 [3]:
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https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-4.pdf [4]: https:
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//github.com/openssl/openssl/blob/85f17585b0d8b55b335f561e2862db14a20b
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1e64/crypto/ec/ecdsa_ossl.c#L201-L207 :gl:`#5072` :gl:`!9808`
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- Revert "Lock and attach when returning zone stats" ``de6f199f4d2``
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:gl:`#5082` :gl:`!9859`
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- Unknown directive in resolv.conf not handled properly. ``48901ef57e7``
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The line after an unknown directive in resolv.conf could accidentally
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be skipped, potentially affecting dig, host, nslookup, nsupdate, or
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delv. This has been fixed. :gl:`#5084` :gl:`!9865`
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- Querying an NSEC3-signed zone for an empty record could trigger an
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assertion. ``3a94afa03a1``
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A bug in the qpzone database could trigger a crash when querying for a
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deleted name, or a newly-added empty non-terminal name, in an
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NSEC3-signed zone. This has been fixed. :gl:`#5108` :gl:`!9928`
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- Fix response policy zones and catalog zones with an $INCLUDE statement
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defined. ``19a2aab136a``
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Response policy zones (RPZ) and catalog zones were not working
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correctly if they had an $INCLUDE statement defined. This has been
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fixed. :gl:`#5111` :gl:`!9930`
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- Clean up incorrect logging module names. ``3db39ec7ad5``
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Some files used logmodule names that had been copied in from
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elsewhere; these have now been given module names of their own. Also,
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the RBT and RBTDB logmodules have been removed, since they are now
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unused. :gl:`!9895`
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- Finalize removal of memory debug flags size and mctx. ``667383587b2``
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Commit 4b3d0c66009d30f5c0bc12ee128fc59f1d853f44 has removed them, but
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did not remove few traces in documentation and help. Remove them from
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remaining places. :gl:`!9606`
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- Mark loop as shuttingdown earlier in shutdown_cb. ``d71869d6a78``
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:gl:`!9827`
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- Use CMM_{STORE,LOAD}_SHARED to store/load glue in gluelist.
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``6ce55429f14``
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ThreadSanitizer has trouble understanding that gluelist->glue is
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constant after it is assigned to the slabheader with cmpxchg. Help
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ThreadSanitizer to understand the code by using CMM_STORE_SHARED and
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CMM_LOAD_SHARED on gluelist->glue. :gl:`!9929`
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