! Corrected a buffer overwrite possible when parsing hexadecimal
literals with more than 1024 octets. Reported by Jon Franklin from Dell,
and also by Pawel Wieczorkiewicz from Amazon Web Services.
[Gitlab #182]
CVE: CVE-2021-25217
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]
mDNSResponder: another wrong return local address
dhcp: ignore a seemingly impossible stringop overflow
hpacel: avoid maybe uninitialised error that is wrong.
rsh: avoid impossible malloc(0)
udf: cast pointers through (uintptr_t) to fool invalid boundary checks
The duplicate include has been added upstream, further up in the file.
Since lint1/tree.c 1.202 from 2021-01-31, lint no longer needs the
/*CONSTCOND*/ for do-while-0 "loops".
the nslookup.1 page in the distribution. Consider replacing this man page
with the one from the distribution, since this manual page describes options
available only in the original implemementation. On the other hand, this
man page is mdoc, not man... (Takahiro Kambe)
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]
Cherry-picked from upstream:
https://git.savannah.gnu.org/gitweb/?p=config.git;a=commit;h=1c4398015583eb77bc043234f5734be055e64bea
Everything except external/apache2/llvm/dist/llvm/cmake/config.guess
is patched, which is under vendor tag and cannot be modified. I expect
that this file is not actually used as we use hand-crafted version of
configure script instead of cmake for building LLVM.
Note that external/apache2/llvm/autoconf/autoconf/config.guess has
already been committed on Oct. 20, but commit message disappeared as
cvs aborted due to "permission denied" when trying to modify the file
mentioned above. Sorry for confusing you.
Also note that GMP uses its own config.guess Patch for
external/lgpl3/gmp/dist/config.guess is provided by ryo@. Thanks!
Version 4.4.2
22 January 2020
Release Notes
NEW FEATURES
Please note that that ISC DHCP is now licensed under the Mozilla Public License,
MPL 2.0. Please see https://www.mozilla.org/en-US/MPL/2.0/ to read the MPL 2.0
license terms.
While release 4.4.2 is primarily a maintenance release that addresses a number
of defects, it does introduce a few new features:
- Keama - Keama is a migration utility that assists in converting ISC DHCP
server configuration files to Kea configuration files. It is found in the
keama subdirectory and includes a README.md file with instructions on how
to build it as well as a manpage on its usage.
- Two new server parameters related to ping checking were added:
1. ping-cltt-secs which allows the user to specify the number of seconds
that must elapse since CLTT before a ping check is conducted.
2. ping-timeout-ms which allows the user to specify the amount of time the
server waits for a ping-check response in milliseconds rather than in
seconds.
In general, the areas of focus for ISC DHCP 4.4 were:
1. Dynamic DNS additions
2. dhclient improvements
3. Support for dynamic shared libraries
Dynamic DNS Improvements:
- We added three new server configuration parameters which influence DDNS
conflict resolution:
1. ddns-dual-stack-mixed-mode - alters DNS conflict resolution behavior
to mitigate issues with non-compliant clients in dual stack environments.
2. ddns-guard-id-must-match - relaxes the DHCID RR client id matching
requirement of DNS conflict resolution.
3. ddns-other-guard-is-dynamic - alters dual-stack-mixed-mode behavior to
allow unguarded DNS entries to be overwritten in certain cases
- The server now honors update-static-leases parameter for static DHCPv6
hosts.
dhclient Improvements:
- We've added three command line parameters to dhclient:
1. --prefix-len-hint - directs dhclient to use the given length as
the prefix length hint when requesting prefixes
2. --decline-wait-time - instructs the client to wait the given number
of seconds after declining an IPv4 address before issuing a discover
3. --address-prefix-len - specifies the prefix length passed by dhclient
into the client script (via the environment variable ip6_prefixlen) with
each IPv6 address. We added this parameter because we have changed the
default value from 64 to 128 in order to be compliant with RFC3315bis
draft (-09, page 64) and RFC5942, Section 4, point 1.
**WARNING**: The new default value of 128 may not be backwardly compatible
with your environment. If you are operating without a router, such as
between VMs on a host, you may find they cannot see each other with prefix
length of 128. In such cases, you'll need to either provide routing or use
the command line parameter to set the value to 64. Alternatively you may
change the default at compile time by setting DHCLIENT_DEFAULT_PREFIX_LEN
in includes/site.h.
- dhclient will now generate a DHCPv6 DECLINE message when the client script
indicates a DAD failure
Dynamic shared library support:
Configure script, configure.ac+lt, which supports libtool is now provided
with the source tar ball. This script can be used to configure ISC DHCP
to build with libtool and thus use dynamic shared libraries.
Other Highlights:
- The server now supports dhcp-cache-threshold for DHCPv6 operations
- The server now supports DHPv6 address allocation based on EUI-64 DUIDs
- Experimental support for alternate relay port in the both the server
and relay for IPv4, IPv6 and 4o6 (see: draft-ietf-dhc-relay-port-10.txt)
For information on how to install, configure and run this software, as
well as how to find documentation and report bugs, please consult the
README file.
ISC DHCP uses standard GNU configure for installation. Please review the
output of "./configure --help" to see what options are available.
The system has only been tested on Linux, FreeBSD, and Solaris, and may not
work on other platforms. Please report any problems and suggested fixes to
<dhcp-users@isc.org>.
ISC DHCP is open source software maintained by Internet Systems
Consortium. This product includes cryptographic software written
by Eric Young (eay@cryptsoft.com).
Changes since 4.4.2b1 (Bug Fixes)
- Added a clarification on DHCPINFORMs and server authority to
dhcpd.conf.5
[Gitlab #37]
- Only emit lease scrubbing log messages when DEBUG_FAILOVER_MESSAGES
is defined.
[Gitlab #72]
- Added the interface name to socket initialization failure log messages.
Prior to this the log messages stated only the error reason without
stating the target interface.
[Gitlab #75]
- Corrected buffer pointer logic in dhcrelay functions that manipulate
agent relay options. Thanks to Thomas Imbert of MSRC Vulnerabilities
& Mitigations for reporting the issue.
[#71]
- Corrected unresolved symbol errors building relay_unittests when
configured to build using libtool.
[#80]
Changes since 4.4.1 (New Features)
- A new configuration parameter, ping-cltt-secs (v4 operation only), has
been added to allow the user to specify the number of seconds that must
elapse since CLTT before a ping check is conducted. Prior to this, the
value was hard coded at 60 seconds. Please see the server man pages for
a more detailed discussion.
[ISC-Bugs #36283]
- A new configuration parameter, ping-timeout-ms (v4 operation only),
has been added that allows the user to specify the amount of time
the server waits for a ping-check response in milliseconds rather
than in seconds (via ping-timeout). When greater than zero, the value
of ping-timeout-ms will override the value of ping-timeout. Thanks
to Jay Doran from Bluecat Networks for suggesting this feature.
[Gitlab #10]
- An experimental tool called, Keama (KEA Migration Assistant), which helps
translate ISC DHCP configurations to Kea configurations, is now included
in the distribution.
[Gitlab #34]
Changes since 4.4.1 (Bug Fixes)
- Corrected a misuse of the BIND9 DDNS API which caused DDNS updates to be
carried out over TCP rather than UDP. The coding error was exposed by
migration to BIND9 9.11. Thanks to Jinmei Tatuya at Infoblox for
reporting the issue.
[ISC-Bugs #47757]
- Bind9 now defaults to requiring python to build. The Makefile for
building Bind9 when bundled with ISC DHCP was modified to turn off
this dependency.
[Gitlab #3]
- Corrected a dual-stack mixed-mode issue that occurs when both
ddns-guard-id-must-match and ddns-other-guard-is-dynamic
are enabled and that caused the server to incorrectly interpret
the presence of a guard record belonging to another client as
a case of no guard record at all. Thanks to Fernando Soto
from BlueCat Networks for reporting this issue.
[Gitlab #1]
- Corrected a compilation issue that occurred when building without DNS
update ability (e.g. by undefining NSUPDATE).
[Gitlab #16]
- Corrected an issue that was causing the server, when running in
DHPCv4 mode, to segfault when class lease limits are reached.
Thanks to Peter Nagy at Porion-Digital for reporting the matter
and submitting a patch.
[Gitlab #13]
- Made minor changes to eliminate warnings when compiled with GCC 9.
Thanks to Brett Neumeier for bringing the matter to our attention.
[Gitlab #15]
- Fixed potential memory leaks in parser error message generation
spotted by Coverity, CIDs: 1448191, 1448193, 1448194, 1448195
[Gitlab #30]
- Updated URL of IEEE oui.txt in contrib/dhcp-lease-list.pl. Thanks
to Tommy Smith for contributing the patch.
[Gitlab #26]
- Fixed define flags when using SO_BINDTODEVICE. Thanks to Joe LeVeque for
reporting the issue.
[GitLab #19]
- Applied a patch from OpenBSD to always set the scope id of outbound
DHPCv6 packets. Note this change only applies when compiling under
OpenBSD. Thanks to Brad Smith at OpenBSD from bringing it to our
attention.
[Gitlab #33]
- Modified dhclient to not discard config file leases that are
duplicates of server-provided leases and to retain such leases
after they have been used as the fallback active lease and
DHCP service has been restored. This allows them to be used
more than once during the lifetime of a dhclient instance.
This applies to DHCPv4 operation only.
[Gitlab #9]
- Corrected a number of reference counter and zero-length buffer leaks.
Thanks to Christopher Ertl of MSRC Vulnerabilities & Mitigations for
pointing them out.
[Gitlab #57]
- Closed a small window of time between the installation of graceful
shutdown signal handlers and application context startup, during which
the receipt of shutdown signal would cause a REQUIRE() assertion to
occur. Note this issue is only visible when compiling with
ENABLE_GENTLE_SHUTDOWN defined.
[Gitlab #53]
- Corrected a buffer overflow that can occur when retrieving zone
names that are more than 255 characters in length.
[Gitlab #20]
- The "d" domain name option format was incorrectly handled as text
instead of RFC 1035 wire format. Thanks to Jay Doran at BlueCat Networks
for reporting this issue.
[Gitlab #2]
- Improved the error message issued when a host declaration has both
a uid and a dhcp-client-identifier. Server configuration parsing will
now fail if a host declaration specifies more than one uid.
[Gitlab #7]
- Updated developer's documentation on building and running unit tests.
Removed support for --with-atf=bind as BIND9 no longer bundles in ATF
source.
[Gitlab #35]
- Fixed a syntax error in ldap.c which cropped up under Ubuntu
18.04.1/gcc 7.4.0. Thanks to Charles Hedrick for pointing it out.
[Gitlab #51]
- Added clarification to dhcp-options.5 section on ip-address values
describing the first-use DNS resolution of options with hostnames as
values (e.g. next-server).
[Gitlab #28]
- The option format for the server option omapi-key was changed to a
format type 'k' (key name); while server options ldap-port and
ldap-init-retry were changed to 'L' (unsigned 32-bit integer). These
three options were inadvertantly broken when the 'd' format content
was changed to comply with RFC 1035 wire format (see Gitlab #2).
[Gitlab #68]
5458. [bug] Prevent a theoretically possible NULL dereference caused
by a data race between zone_maintenance() and
dns_zone_setview_helper(). [GL #1627]
5455. [bug] named could crash when cleaning dead nodes in
lib/dns/rbtdb.c that were being reused. [GL #1968]
5454. [bug] Address a startup crash that occurred when the server
was under load and the root zone had not yet been
loaded. [GL #1862]
5453. [bug] named crashed on shutdown when a new rndc connection was
received during shutdown. [GL #1747]
5452. [bug] The "blackhole" ACL was accidentally disabled for client
queries. [GL #1936]
5451. [func] Add 'rndc dnssec -status' command. [GL #1612]
5449. [bug] Fix a socket shutdown race in netmgr udp. [GL #1938]
5448. [bug] Fix a race condition in isc__nm_tcpdns_send().
[GL #1937]
5447. [bug] IPv6 addresses ending in "::" could break YAML
parsing. A "0" is now appended to such addresses
in YAML output from dig, mdig, delv, and dnstap-read.
[GL #1952]
5446. [bug] The validator could fail to accept a properly signed
RRset if an unsupported algorithm appeared earlier in
the DNSKEY RRset than a supported algorithm. It could
also stop if it detected a malformed public key.
[GL #1689]
5444. [bug] 'rndc dnstap -roll <value>' did not limit the number of
saved files to <value>. [GL !3728]
5443. [bug] The "primary" and "secondary" keywords, when used
as parameters for "check-names", were not
processed correctly and were being ignored. [GL #1949]
5441. [bug] ${LMDB_CFLAGS} was missing from make/includes.in.
[GL #1955]
5440. [test] Properly handle missing kyua. [GL #1950]
5439. [bug] The DS RRset returned by dns_keynode_dsset() was used in
a non-thread-safe manner. [GL #1926]
--- 9.16.4 released ---
5438. [bug] Fix a race in TCP accepting code. [GL #1930]
5437. [bug] Fix a data race in lib/dns/resolver.c:log_formerr().
[GL #1808]
5436. [security] It was possible to trigger an INSIST when determining
whether a record would fit into a TCP message buffer.
(CVE-2020-8618) [GL #1850]
5435. [tests] Add RFC 4592 responses examples to the wildcard system
test. [GL #1718]
5434. [security] It was possible to trigger an INSIST in
lib/dns/rbtdb.c:new_reference() with a particular zone
content and query patterns. (CVE-2020-8619) [GL #1111]
[GL #1718]
5431. [func] Reject DS records at the zone apex when loading
master files. Log but otherwise ignore attempts to
add DS records at the zone apex via UPDATE. [GL #1798]
5430. [doc] Update docs - with netmgr, a separate listening socket
is created for each IPv6 interface (just as with IPv4).
[GL #1782]
5428. [bug] Clean up GSSAPI resources in nsupdate only after taskmgr
has been destroyed. Thanks to Petr Menšík. [GL !3316]
5426. [bug] Don't abort() when setting SO_INCOMING_CPU on the socket
fails. [GL #1911]
5425. [func] The default value of "max-stale-ttl" has been changed
from 1 week to 12 hours. [GL #1877]
5424. [bug] With KASP, when creating a successor key, the "goal"
state of the current active key (predecessor) was not
changed and thus never removed from the zone. [GL #1846]
5423. [bug] Fix a bug in keymgr_key_has_successor(): it incorrectly
returned true if any other key in the keyring had a
successor. [GL #1845]
5422. [bug] When using dnssec-policy, print correct key timing
metadata. [GL #1843]
5421. [bug] Fix a race that could cause named to crash when looking
up the nodename of an RBT node if the tree was modified.
[GL #1857]
5420. [bug] Add missing isc_{mutex,conditional}_destroy() calls
that caused a memory leak on FreeBSD. [GL #1893]
5418. [bug] delv failed to parse deprecated trusted-keys-style
trust anchors. [GL #1860]
5416. [bug] Fix a lock order inversion in lib/isc/unix/socket.c.
[GL #1859]
5415. [test] Address race in dnssec system test that led to
test failures. [GL #1852]
5414. [test] Adjust time allowed for journal truncation to occur
in nsupdate system test to avoid test failure.
[GL #1855]
5413. [test] Address race in autosign system test that led to
test failures. [GL #1852]
5412. [bug] 'provide-ixfr no;' failed to return up-to-date responses
when the serial was greater than or equal to the
current serial. [GL #1714]
5411. [cleanup] TCP accept code has been refactored to use a single
accept() and pass the accepted socket to child threads
for processing. [GL !3320]
5409. [performance] When looking up NSEC3 data in a zone database, skip the
check for empty non-terminal nodes; the NSEC3 tree does
not have any. [GL #1834]
5408. [protocol] Print Extended DNS Errors if present in OPT record.
[GL #1835]
5407. [func] Zone timers are now exported via statistics channel.
Thanks to Paul Frieden, Verizon Media. [GL #1232]
5405. [bug] 'named-checkconf -p' could include spurious text in
server-addresses statements due to an uninitialized DSCP
value. [GL #1812]
This logic correctly uses strncpy(3) to fully initialize a fixed-width field, and also ensures
NUL-termination on the next line as other users of the field expect.
Add -Werror=stringop-truncation to prevent build failure, when run with MKSANITIZER=yes.
Error was reported when build.sh was run with MKSANITIZER=yes flag.
Reviewed by: kamil@
