Merge tag 'v9_16_37' into v9_16

BIND 9.16.37

doc/arm/notes.rst

@@ -47,6 +47,7 @@ for Microsoft Windows operating systems.
 .. include:: ../notes/notes-known-issues.rst
 
 .. include:: ../notes/notes-current.rst
+.. include:: ../notes/notes-9.16.37.rst
 .. include:: ../notes/notes-9.16.36.rst
 .. include:: ../notes/notes-9.16.35.rst
 .. include:: ../notes/notes-9.16.34.rst

doc/arm/reference.rst

@@ -3151,6 +3151,11 @@ system.
    value as ``tcp-keepalive-timeout``. This value can be updated at
    runtime by using ``rndc tcp-timeouts``.
 
+``update-quota``
+   This is the maximum number of simultaneous DNS UPDATE messages that
+   the server will accept for updating local authoritiative zones or
+   forwarding to a primary server. The default is ``100``.
+
 .. _intervals:
 
 Periodic Task Intervals
@@ -6837,6 +6842,11 @@ Name Server Statistics Counters
 ``UpdateBadPrereq``
     This indicates the number of dynamic updates rejected due to a prerequisite failure.
 
+``UpdateQuota``
+    This indicates the number of times a dynamic update or update
+    forwarding request was rejected because the number of pending
+    requests exceeded ``update-quota``.
+
 ``RateDropped``
     This indicates the number of responses dropped due to rate limits.
 

doc/dnssec-guide/introduction.rst

@@ -250,7 +250,7 @@ at a very high level, looking up the name ``www.isc.org`` :
 
     Let's take a quick break here and look at what we've got so far...
     how can our server trust this answer? If a clever attacker had taken over
-    the ``isc.org`` name server(s), or course she would send matching
+    the ``isc.org`` name server(s), of course she would send matching
     keys and signatures. We need to ask someone else to have confidence
     that we are really talking to the real ``isc.org`` name server. This
     is a critical part of DNSSEC: at some point, the DNS administrators

doc/man/named.conf.5in

@@ -231,7 +231,7 @@ options {
       answer\-cookie boolean;
       attach\-cache string;
       auth\-nxdomain boolean; // default changed
-      auto\-dnssec ( allow | maintain | off );
+      auto\-dnssec ( allow | maintain | off );// deprecated
       automatic\-interface\-scan boolean;
       avoid\-v4\-udp\-ports { portrange; ... };
       avoid\-v6\-udp\-ports { portrange; ... };
@@ -498,6 +498,7 @@ options {
       trust\-anchor\-telemetry boolean; // experimental
       try\-tcp\-refresh boolean;
       update\-check\-ksk boolean;
+      update\-quota integer;
       use\-alt\-transfer\-source boolean;
       use\-v4\-udp\-ports { portrange; ... };
       use\-v6\-udp\-ports { portrange; ... };
@@ -668,7 +669,7 @@ view string [ class ] {
           * ) ] [ dscp integer ];
       attach\-cache string;
       auth\-nxdomain boolean; // default changed
-      auto\-dnssec ( allow | maintain | off );
+      auto\-dnssec ( allow | maintain | off );// deprecated
       cache\-file quoted_string;// deprecated
       catalog\-zones { zone string [ default\-masters [ port integer ]
           [ dscp integer ] { ( remote\-servers | ipv4_address [ port
@@ -943,7 +944,7 @@ view string [ class ] {
                   integer | * ) ] [ dscp integer ];
               alt\-transfer\-source\-v6 ( ipv6_address | * ) [ port (
                   integer | * ) ] [ dscp integer ];
-              auto\-dnssec ( allow | maintain | off );
+              auto\-dnssec ( allow | maintain | off );// deprecated
               check\-dup\-records ( fail | warn | ignore );
               check\-integrity boolean;
               check\-mx ( fail | warn | ignore );
@@ -1065,7 +1066,7 @@ zone string [ class ] {
           ] [ dscp integer ];
       alt\-transfer\-source\-v6 ( ipv6_address | * ) [ port ( integer |
           * ) ] [ dscp integer ];
-      auto\-dnssec ( allow | maintain | off );
+      auto\-dnssec ( allow | maintain | off );// deprecated
       check\-dup\-records ( fail | warn | ignore );
       check\-integrity boolean;
       check\-mx ( fail | warn | ignore );

doc/misc/master.zoneopt.rst

@@ -20,7 +20,7 @@
   	also-notify [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ]; ... };
   	alt-transfer-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
   	alt-transfer-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
-  	auto-dnssec ( allow | maintain | off );
+  	auto-dnssec ( allow | maintain | off ); // deprecated
   	check-dup-records ( fail | warn | ignore );
   	check-integrity <boolean>;
   	check-mx ( fail | warn | ignore );

doc/misc/options

@@ -404,6 +404,7 @@ options {
         trust-anchor-telemetry <boolean>; // experimental
         try-tcp-refresh <boolean>;
         update-check-ksk <boolean>;
+        update-quota <integer>;
         use-alt-transfer-source <boolean>;
         use-id-pool <boolean>; // ancient
         use-ixfr <boolean>; // obsolete

doc/misc/options.active

@@ -363,6 +363,7 @@ options {
         trust-anchor-telemetry <boolean>; // experimental
         try-tcp-refresh <boolean>;
         update-check-ksk <boolean>;
+        update-quota <integer>;
         use-alt-transfer-source <boolean>;
         use-v4-udp-ports { <portrange>; ... };
         use-v6-udp-ports { <portrange>; ... };

doc/misc/options.grammar.rst

@@ -33,7 +33,7 @@
   	answer-cookie <boolean>;
   	attach-cache <string>;
   	auth-nxdomain <boolean>; // default changed
-  	auto-dnssec ( allow | maintain | off );
+  	auto-dnssec ( allow | maintain | off ); // deprecated
   	automatic-interface-scan <boolean>;
   	avoid-v4-udp-ports { <portrange>; ... };
   	avoid-v6-udp-ports { <portrange>; ... };
@@ -300,6 +300,7 @@
   	trust-anchor-telemetry <boolean>; // experimental
   	try-tcp-refresh <boolean>;
   	update-check-ksk <boolean>;
+  	update-quota <integer>;
   	use-alt-transfer-source <boolean>;
   	use-v4-udp-ports { <portrange>; ... };
   	use-v6-udp-ports { <portrange>; ... };

doc/misc/slave.zoneopt.rst

@@ -21,7 +21,7 @@
   	also-notify [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ]; ... };
   	alt-transfer-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
   	alt-transfer-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
-  	auto-dnssec ( allow | maintain | off );
+  	auto-dnssec ( allow | maintain | off ); // deprecated
   	check-names ( fail | warn | ignore );
   	database <string>;
   	dialup ( notify | notify-passive | passive | refresh | <boolean> );

doc/notes/notes-9.16.37.rst

@@ -0,0 +1,80 @@
+.. Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+..
+.. SPDX-License-Identifier: MPL-2.0
+..
+.. This Source Code Form is subject to the terms of the Mozilla Public
+.. License, v. 2.0.  If a copy of the MPL was not distributed with this
+.. file, you can obtain one at https://mozilla.org/MPL/2.0/.
+..
+.. See the COPYRIGHT file distributed with this work for additional
+.. information regarding copyright ownership.
+
+Notes for BIND 9.16.37
+----------------------
+
+Security Fixes
+~~~~~~~~~~~~~~
+
+- An UPDATE message flood could cause :iscman:`named` to exhaust all
+  available memory. This flaw was addressed by adding a new
+  ``update-quota`` option that controls the maximum number of
+  outstanding DNS UPDATE messages that :iscman:`named` can hold in a
+  queue at any given time (default: 100). (CVE-2022-3094)
+
+  ISC would like to thank Rob Schulhof from Infoblox for bringing this
+  vulnerability to our attention. :gl:`#3523`
+
+- :iscman:`named` could crash with an assertion failure when an RRSIG
+  query was received and ``stale-answer-client-timeout`` was set to a
+  non-zero value. This has been fixed. (CVE-2022-3736)
+
+  ISC would like to thank Borja Marcos from Sarenet (with assistance by
+  Iratxe Niño from Fundación Sarenet) for bringing this vulnerability to
+  our attention. :gl:`#3622`
+
+- :iscman:`named` running as a resolver with the
+  ``stale-answer-client-timeout`` option set to any value greater than
+  ``0`` could crash with an assertion failure, when the
+  ``recursive-clients`` soft quota was reached. This has been fixed.
+  (CVE-2022-3924)
+
+  ISC would like to thank Maksym Odinintsev from AWS for bringing this
+  vulnerability to our attention. :gl:`#3619`
+
+New Features
+~~~~~~~~~~~~
+
+- The new ``update-quota`` option can be used to control the number of
+  simultaneous DNS UPDATE messages that can be processed to update an
+  authoritative zone on a primary server, or forwarded to the primary
+  server by a secondary server. The default is 100. A new statistics
+  counter has also been added to record events when this quota is
+  exceeded, and the version numbers for the XML and JSON statistics
+  schemas have been updated. :gl:`#3523`
+
+Feature Changes
+~~~~~~~~~~~~~~~
+
+- The Differentiated Services Code Point (DSCP) feature in BIND has been
+  deprecated. Configuring DSCP values in ``named.conf`` now causes a
+  warning to be logged. Note that this feature has only been partly
+  operational since the new Network Manager was introduced in BIND
+  9.16.0. :gl:`#3773`
+
+- The catalog zone implementation has been optimized to work with
+  hundreds of thousands of member zones. :gl:`#3744`
+
+Bug Fixes
+~~~~~~~~~
+
+- In certain query resolution scenarios (e.g. when following CNAME
+  records), :iscman:`named` configured to answer from stale cache could
+  return a SERVFAIL response despite a usable, non-stale answer being
+  present in the cache. This has been fixed. :gl:`#3678`
+
+Known Issues
+~~~~~~~~~~~~
+
+- There are no new known issues with this release. See :ref:`above
+  <relnotes_known_issues>` for a list of all known issues affecting this
+  BIND 9 branch.