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Merge changes between bind 9.16.15 and 9.16.20 and restore dns client APIs needed by dhcpd.
Merge our changes between bind 9.16.12 and 9.16.15
Import bind-9.16.15 Changes since bind-9.16.12: --- 9.16.15 released --- 5621. [bug] Due to a backporting mistake in change 5609, named binaries built against a Kerberos/GSSAPI library whose header files did not define the GSS_SPNEGO_MECHANISM preprocessor macro were not able to start if their configuration included the "tkey-gssapi-credential" option. This has been fixed. [GL #2634] 5620. [bug] If zone journal files written by BIND 9.16.11 or earlier were present when BIND was upgraded, the zone file for that zone could have been inadvertently rewritten with the current zone contents. This caused the original zone file structure (e.g. comments, $INCLUDE directives) to be lost, although the zone data itself was preserved. This has been fixed. [GL #2623] --- 9.16.14 released --- 5617. [security] A specially crafted GSS-TSIG query could cause a buffer overflow in the ISC implementation of SPNEGO. (CVE-2021-25216) [GL #2604] 5616. [security] named crashed when a DNAME record placed in the ANSWER section during DNAME chasing turned out to be the final answer to a client query. (CVE-2021-25215) [GL #2540] 5615. [security] Insufficient IXFR checks could result in named serving a zone without an SOA record at the apex, leading to a RUNTIME_CHECK assertion failure when the zone was subsequently refreshed. This has been fixed by adding an owner name check for all SOA records which are included in a zone transfer. (CVE-2021-25214) [GL #2467] 5614. [bug] Ensure all resources are properly cleaned up when a call to gss_accept_sec_context() fails. [GL #2620] 5613. [bug] It was possible to write an invalid transaction header in the journal file for a managed-keys database after upgrading. This has been fixed. Invalid headers in existing journal files are detected and named is able to recover from them. [GL #2600] 5611. [func] Set "stale-answer-client-timeout" to "off" by default. [GL #2608] 5610. [bug] Prevent a crash which could happen when a lookup triggered by "stale-answer-client-timeout" was attempted right after recursion for a client query finished. [GL #2594] 5609. [func] The ISC implementation of SPNEGO was removed from BIND 9 source code. It was no longer necessary as all major contemporary Kerberos/GSSAPI libraries include support for SPNEGO. [GL #2607] 5608. [bug] When sending queries over TCP, dig now properly handles "+tries=1 +retry=0" by not retrying the connection when the remote server closes the connection prematurely. [GL #2490] 5607. [bug] As "rndc dnssec -checkds" and "rndc dnssec -rollover" commands may affect the next scheduled key event, reconfiguration of zone keys is now triggered after receiving either of these commands to prevent unnecessary key rollover delays. [GL #2488] 5606. [bug] CDS/CDNSKEY DELETE records are now removed when a zone transitions from a secure to an insecure state. named-checkzone also no longer reports an error when such records are found in an unsigned zone. [GL #2517] 5605. [bug] "dig -u" now uses the CLOCK_REALTIME clock source for more accurate time reporting. [GL #2592] 5603. [bug] Fix a memory leak that occurred when named failed to bind a UDP socket to a network interface. [GL #2575] 5602. [bug] Fix TCPDNS and TLSDNS timers in Network Manager. This makes the "tcp-initial-timeout" and "tcp-idle-timeout" options work correctly again. [GL #2583] 5601. [bug] Zones using KASP could not be thawed after they were frozen using "rndc freeze". This has been fixed. [GL #2523] --- 9.16.13 released --- 5597. [bug] When serve-stale was enabled and starting the recursive resolution process for a query failed, a named instance could crash if it was configured as both a recursive and authoritative server. This problem was introduced by change 5573 and has now been fixed. [GL #2565] 5595. [cleanup] Public header files for BIND 9 libraries no longer directly include third-party library headers. This prevents the need to include paths to third-party header files in CFLAGS whenever BIND 9 public header files are used, which could cause build-time issues on hosts with older versions of BIND 9 installed. [GL #2357] 5594. [bug] Building with --enable-dnsrps --enable-dnsrps-dl failed. [GL #2298] 5593. [bug] Journal files written by older versions of named can now be read when loading zones, so that journal incompatibility does not cause problems on upgrade. Outdated journals are updated to the new format after loading. [GL #2505] 5592. [bug] Prevent hazard pointer table overflows on machines with many cores, by allowing the thread IDs (serving as indices into hazard pointer tables) of finished threads to be reused by those created later. [GL #2396] 5591. [bug] Fix a crash that occurred when "stale-answer-client-timeout" was triggered without any (stale) data available in the cache to answer the query. [GL #2503] 5590. [bug] NSEC3 records were not immediately created for dynamic zones using NSEC3 with "dnssec-policy", resulting in such zones going bogus. Add code to process the NSEC3PARAM queue at zone load time so that NSEC3 records for such zones are created immediately. [GL #2498] 5588. [func] Add a new "purge-keys" option for "dnssec-policy". This option determines the period of time for which key files are retained after they become obsolete. [GL #2408] 5586. [bug] An invalid direction field in a LOC record resulted in an INSIST failure when a zone file containing such a record was loaded. [GL #2499] 5584. [bug] No longer set the IP_DONTFRAG option on UDP sockets, to prevent dropping outgoing packets exceeding "max-udp-size". [GL #2466] 5582. [bug] BIND 9 failed to build when static OpenSSL libraries were used and the pkg-config files for libssl and/or libcrypto were unavailable. This has been fixed by ensuring that the correct linking order for libssl and libcrypto is always used. [GL #2402] 5581. [bug] Fix a memory leak that occurred when inline-signed zones were added to the configuration, followed by a reconfiguration of named. [GL #2041] 5580. [test] The system test framework no longer differentiates between SKIPPED and UNTESTED system test results. Any system test which is not run is now marked as SKIPPED. [GL !4517] 5573. [func] When serve-stale is enabled and stale data is available, named now returns stale answers upon encountering any unexpected error in the query resolution process. However, the "stale-refresh-time" window is still only started upon a timeout. [GL #2434] 5564. [cleanup] Network manager's TLSDNS module was refactored to use libuv and libssl directly instead of a stack of TCP/TLS sockets. [GL #2335]
merge conflicts, adjust build.
--- 9.16.12 released ---
5578. [protocol] Make "check-names" accept A records below "_spf",
"_spf_rate", and "_spf_verify" labels in order to cater
for the "exists" SPF mechanism specified in RFC 7208
section 5.7 and appendix D.1. [GL #2377]
5577. [bug] Fix the "three is a crowd" key rollover bug in KASP by
correctly implementing Equation (2) of the "Flexible and
Robust Key Rollover" paper. [GL #2375]
5575. [bug] When migrating to KASP, BIND 9 considered keys with the
"Inactive" and/or "Delete" timing metadata to be
possible active keys. This has been fixed. [GL #2406]
5572. [bug] Address potential double free in generatexml().
[GL #2420]
5571. [bug] named failed to start when its configuration included a
zone with a non-builtin "allow-update" ACL attached.
[GL #2413]
5570. [bug] Improve performance of the DNSSEC verification code by
reducing the number of repeated calls to
dns_dnssec_keyfromrdata(). [GL #2073]
5569. [bug] Emit useful error message when "rndc retransfer" is
applied to a zone of inappropriate type. [GL #2342]
5568. [bug] Fixed a crash in "dnssec-keyfromlabel" when using ECDSA
keys. [GL #2178]
5567. [bug] Dig now reports unknown dash options while pre-parsing
the options. This prevents "-multi" instead of "+multi"
from reporting memory usage before ending option parsing
with "Invalid option: -lti". [GL #2403]
5566. [func] Add "stale-answer-client-timeout" option, which is the
amount of time a recursive resolver waits before
attempting to answer the query using stale data from
cache. [GL #2247]
5565. [func] The SONAMEs for BIND 9 libraries now include the current
BIND 9 version number, in an effort to tightly couple
internal libraries with a specific release. [GL #2387]
5562. [security] Fix off-by-one bug in ISC SPNEGO implementation.
(CVE-2020-8625) [GL #2354]
5561. [bug] KASP incorrectly set signature validity to the value of
the DNSKEY signature validity. This is now fixed.
[GL #2383]
5560. [func] The default value of "max-stale-ttl" has been changed
from 12 hours to 1 day and the default value of
"stale-answer-ttl" has been changed from 1 second to 30
seconds, following RFC 8767 recommendations. [GL #2248]
5456. [func] Added "primaries" as a synonym for "masters" in
named.conf, and "primary-only" as a synonym for
"master-only" in the parameters to "notify", to bring
terminology up-to-date with RFC 8499. [GL #1948]
5362. [func] Limit the size of IXFR responses so that AXFR will
be used instead if it would be smaller. This is
controlled by the "max-ixfr-ratio" option, which
is a percentage representing the ratio of IXFR size
to the size of the entire zone. This value cannot
exceed 100%, which is the default. [GL #1515]
--- 9.16.11 released ---
5559. [bug] The --with-maxminddb=PATH form of the build-time option
enabling support for libmaxminddb was not working
correctly. This has been fixed. [GL #2366]
5557. [bug] Prevent RBTDB instances from being destroyed by multiple
threads at the same time. [GL #2317]
5556. [bug] Further tweak newline printing in dnssec-signzone and
dnssec-verify. [GL #2359]
5555. [bug] server->reload_status was not properly initialized.
[GL #2361]
5554. [bug] dnssec-signzone and dnssec-verify were missing newlines
between log messages. [GL #2359]
5553. [bug] When reconfiguring named, removing "auto-dnssec" did not
turn off DNSSEC maintenance. [GL #2341]
5552. [func] When switching to "dnssec-policy none;", named now
permits a safe transition to insecure mode and publishes
the CDS and CDNSKEY DELETE records, as described in RFC
8078. [GL #1750]
5551. [bug] named no longer attempts to assign threads to CPUs
outside the CPU affinity set. Thanks to Ole Bjørn
Hessen. [GL #2245]
5550. [func] dnssec-signzone and named now log a warning when falling
back to the "increment" SOA serial method. [GL #2058]
5545. [func] OS support for load-balanced sockets is no longer
required to receive incoming queries in multiple netmgr
threads. [GL #2137]
5543. [bug] Fix UDP performance issues caused by making netmgr
callbacks asynchronous-only. [GL #2320]
5542. [bug] Refactor netmgr. [GL #1920] [GL #2034] [GL #2061]
[GL #2194] [GL #2221] [GL #2266] [GL #2283] [GL #2318]
[GL #2321]
--- 9.16.10 released ---
5544. [func] Restore the default value of "nocookie-udp-size" to 4096
bytes. [GL #2250]
5541. [func] Adjust the "max-recursion-queries" default from 75 to
100. [GL #2305]
5540. [port] Fix building with native PKCS#11 support for AEP Keyper.
[GL #2315]
5539. [bug] Tighten handling of missing DNS COOKIE responses over
UDP by falling back to TCP. [GL #2275]
5538. [func] Add NSEC3 support to KASP. A new option for
"dnssec-policy", "nsec3param", can be used to set the
desired NSEC3 parameters. NSEC3 salt collisions are
automatically prevented during resalting. Salt
generation is now logged with zone context. [GL #1620]
5534. [bug] The CNAME synthesized from a DNAME was incorrectly
followed when the QTYPE was CNAME or ANY. [GL #2280]
--- 9.16.9 released ---
5533. [func] Add the "stale-refresh-time" option, a time window that
starts after a failed lookup, during which a stale RRset
is served directly from cache before a new attempt to
refresh it is made. [GL #2066]
5530. [bug] dnstap did not capture responses to forwarded UPDATE
requests. [GL #2252]
5527. [bug] A NULL pointer dereference occurred when creating an NTA
recheck query failed. [GL #2244]
5525. [bug] Change 5503 inadvertently broke cross-compilation by
replacing a call to AC_LINK_IFELSE() with a call to
AC_RUN_IFELSE() in configure.ac. This has been fixed,
making cross-compilation possible again. [GL #2237]
5523. [bug] The initial lookup in a zone transitioning to/from a
signed state could fail if the DNSKEY RRset was not
found. [GL #2236]
5522. [bug] Fixed a race/NULL dereference in TCPDNS send. [GL #2227]
5520. [bug] Fixed a number of shutdown races, reference counting
errors, and spurious log messages that could occur
in the network manager. [GL #2221]
5518. [bug] Stub zones now work correctly with primary servers using
"minimal-responses yes". [GL #1736]
5517. [bug] Do not treat UV_EOF as a TCP4RecvErr or a TCP6RecvErr.
[GL #2208]
--- 9.16.8 released ---
5516. [func] The default EDNS buffer size has been changed from 4096
to 1232 bytes. [GL #2183]
5515. [func] Add 'rndc dnssec -rollover' command to trigger a manual
rollover for a specific key. [GL #1749]
5514. [bug] Fix KASP expected key size for Ed25519 and Ed448.
[GL #2171]
5513. [doc] The ARM section describing the "rrset-order" statement
was rewritten to make it unambiguous and up-to-date with
the source code. [GL #2139]
5512. [bug] "rrset-order" rules using "order none" were causing
named to crash despite named-checkconf treating them as
valid. [GL #2139]
5511. [bug] 'dig -u +yaml' failed to display timestamps to the
microsecond. [GL #2190]
5510. [bug] Implement the attach/detach semantics for dns_message_t
to fix a data race in accessing an already-destroyed
fctx->rmessage. [GL #2124]
5509. [bug] filter-aaaa: named crashed upon shutdown if it was in
the process of recursing for A RRsets. [GL #1040]
5508. [func] Added new parameter "-expired" for "rndc dumpdb" that
also prints expired RRsets (awaiting cleanup) to the
dump file. [GL #1870]
5507. [bug] Named could compute incorrect SIG(0) responses.
[GL #2109]
5506. [bug] Properly handle failed sysconf() calls, so we don't
report invalid memory size. [GL #2166]
5505. [bug] Updating contents of a mixed-case RPZ could cause some
rules to be ignored. [GL #2169]
5503. [bug] Cleaned up reference counting of network manager
handles, now using isc_nmhandle_attach() and _detach()
instead of _ref() and _unref(). [GL #2122]
--- 9.16.7 released ---
5501. [func] Log CDS/CDNSKEY publication. [GL #1748]
5500. [bug] Fix (non-)publication of CDS and CDNSKEY records.
[GL #2103]
5499. [func] Add '-P ds' and '-D ds' arguments to dnssec-settime.
[GL #1748]
5497. [bug] 'dig +bufsize=0' failed to disable EDNS. [GL #2054]
5496. [bug] Address a TSAN report by ensuring each rate limiter
object holds a reference to its task. [GL #2081]
5495. [bug] With query minimization enabled, named failed to
resolve ip6.arpa. names that had extra labels to the
left of the IPv6 part. [GL #1847]
5494. [bug] Silence the EPROTO syslog message on older systems.
[GL #1928]
5493. [bug] Fix off-by-one error when calculating new hash table
size. [GL #2104]
5492. [bug] Tighten LOC parsing to reject a period (".") and/or "m"
as a value. Fix handling of negative altitudes which are
not whole meters. [GL #2074]
5491. [bug] rbtversion->glue_table_size could be read without the
appropriate lock being held. [GL #2080]
5489. [bug] Named erroneously accepted certain invalid resource
records that were incorrectly processed after
subsequently being written to disk and loaded back, as
the wire format differed. Such records include: CERT,
IPSECKEY, NSEC3, NSEC3PARAM, NXT, SIG, TLSA, WKS, and
X25. [GL !3953]
5488. [bug] NTA code needed to have a weak reference on its
associated view to prevent the latter from being deleted
while NTA tests were being performed. [GL #2067]
5486. [func] Add 'rndc dnssec -checkds' command, which signals to
named that the DS record for a given zone or key has
been updated in the parent zone. [GL #1613]
--- 9.16.6 released ---
5484. [func] Expire zero TTL records quickly rather than using them
for stale answers. [GL #1829]
5483. [func] A new configuration option "stale-cache-enable" has been
introduced to enable or disable keeping stale answers in
cache. [GL #1712]
5482. [bug] If the Duplicate Address Detection (DAD) mechanism had
not yet finished after adding a new IPv6 address to the
system, BIND 9 would fail to bind to IPv6 addresses in a
tentative state. [GL #2038]
5481. [security] "update-policy" rules of type "subdomain" were
incorrectly treated as "zonesub" rules, which allowed
keys used in "subdomain" rules to update names outside
of the specified subdomains. The problem was fixed by
making sure "subdomain" rules are again processed as
described in the ARM. (CVE-2020-8624) [GL #2055]
5480. [security] When BIND 9 was compiled with native PKCS#11 support, it
was possible to trigger an assertion failure in code
determining the number of bits in the PKCS#11 RSA public
key with a specially crafted packet. (CVE-2020-8623)
[GL #2037]
5479. [security] named could crash in certain query resolution scenarios
where QNAME minimization and forwarding were both
enabled. (CVE-2020-8621) [GL #1997]
5478. [security] It was possible to trigger an assertion failure by
sending a specially crafted large TCP DNS message.
(CVE-2020-8620) [GL #1996]
5477. [bug] The idle timeout for connected TCP sockets, which was
previously set to a high fixed value, is now derived
from the client query processing timeout configured for
a resolver. [GL #2024]
5476. [security] It was possible to trigger an assertion failure when
verifying the response to a TSIG-signed request.
(CVE-2020-8622) [GL #2028]
5475. [bug] Wildcard RPZ passthru rules could incorrectly be
overridden by other rules that were loaded from RPZ
zones which appeared later in the "response-policy"
statement. This has been fixed. [GL #1619]
5474. [bug] dns_rdata_hip_next() failed to return ISC_R_NOMORE
when it should have. [GL !3880]
5473. [func] The RBT hash table implementation has been changed
to use a faster hash function (HalfSipHash2-4) and
Fibonacci hashing for better distribution. Setting
"max-cache-size" now preallocates a fixed-size hash
table so that rehashing does not cause resolution
brownouts while the hash table is grown. [GL #1775]
5471. [bug] The introduction of KASP support inadvertently caused
the second field of "sig-validity-interval" to always be
calculated in hours, even in cases when it should have
been calculated in days. This has been fixed. (Thanks to
Tony Finch.) [GL !3735]
5469. [port] On illumos, a constant called SEC is already defined in
<sys/time.h>, which conflicts with an identically named
constant in libbind9. This conflict has been resolved.
[GL #1993]
5468. [bug] Addressed potential double unlock in process_fd().
[GL #2005]
5466. [bug] Addressed an error in recursive clients stats reporting.
[GL #1719]
5465. [func] Added fallback to built-in trust-anchors, managed-keys,
or trusted-keys if the bindkeys-file (bind.keys) cannot
be parsed. [GL #1235]
5464. [bug] Requesting more than 128 files to be saved when rolling
dnstap log files caused a buffer overflow. This has been
fixed. [GL #1989]
5462. [bug] Move LMDB locking from LMDB itself to named. [GL #1976]
5461. [bug] The STALE rdataset header attribute was updated while
the write lock was not being held, leading to incorrect
statistics. The header attributes are now converted to
use atomic operations. [GL #1475]
Initial revision