openSUSE Security Update: Security update for nsd
______________________________________________________________________________

Announcement ID:    openSUSE-SU-2020:2222-1
Rating:             moderate
References:         #1157331 #1179191 
Cross-References:   CVE-2019-13207 CVE-2020-28935
Affected Products:
                    openSUSE Leap 15.2
                    openSUSE Leap 15.1
                    openSUSE Backports SLE-15-SP2
                    openSUSE Backports SLE-15-SP1
                    SUSE Package Hub for SUSE Linux Enterprise 12
______________________________________________________________________________

   An update that fixes two vulnerabilities is now available.

Description:

   This update for nsd fixes the following issues:

   nsd was updated to the new upstream release 4.3.4

   FEATURES:

   - Merge PR #141: ZONEMD RR type.

   BUG FIXES:

   - Fix that symlink does not interfere with chown of pidfile (boo#1179191,
     CVE-2020-28935)
   - Fix #128: Fix that the invalid port number is logged for sendmmsg
     failed: Invalid argument.
   - Fix #133: fix 0-init of local ( stack ) buffer.
   - Fix #134: IPV4_MINIMAL_RESPONSE_SIZE vs EDNS_MAX_MESSAGE_LEN.
   - Fix to add missing closest encloser NSEC3 for wildcard nodata type DS
     answer.
   - Fix #138: NSD returns non-EDNS answer when QUESTION is empty.
   - Fix #142: NODATA answers missin SOA in authority section after CNAME
     chain.

   New upstream release 4.3.3:

   FEATURES:

   - Follow DNS flag day 2020 advice and set default EDNS message size to
     1232.
   - Merged PR #113 with fixes.  Instead of listing an IP-address to listen
     on, an interface name can be specified in nsd.conf, with ip-address:
     eth0.  The IP-addresses for that interface are then used.

   - New upstream release 4.3.2

   FEATURES:

   - Fix #96: log-only-syslog: yes sets to only use syslog, fixes that the
     default configuration and systemd results in duplicate log messages.
   - Fix #107: nsd -v shows configure line, openssl version and libevent
     version.
   - Fix #103 with #110: min-expire-time option.  To provide a lower bound
     for expire period.  Expressed in number of seconds or refresh+retry+1.

   BUG FIXES:

   - Fix to omit the listen-on lines from log at startup, unless verbose.
   - Fix #97: EDNS unknown version: query not in response.
   - Fix #99: Fix copying of socket properties with reuseport enabled.
   - Document default value for tcp-timeout.
   - Merge PR#102 from and0x000: add missing default in documentation for
     drop-updates.
   - Fix unlink of pidfile warning if not possible due to permissions, nsd
     can display the message at high verbosity levels.
   - Removed contrib/nsd.service, example is too complicated and not useful.
   - Merge #108 from Nomis: Make the max-retry-time description clearer.
   - Retry when udp send buffer is full to wait until buffer space is
     available.
   - Remove errno reset behaviour from sendmmsg and recvmmsg replacement
     functions.
   - Fix unit test for different nsd-control-setup -h exit code.
   - Merge #112 from jaredmauch: log old and new serials when NSD rejects an
     IXFR due to an old serial number.
   - Fix #106: Adhere better to xfrd bounds.  Refresh and retry times.
   - Fix #105: Clearing hash_tree means just emptying the tree.

   New upstream release 4.3.1

   BUG FIXES:
   - Merge PR #91 by gearnode: nsd-control-setup recreate certificates. The
     '-r' option recreates certificates.  Without it it creates them if they
     do not exist, and does not modify them otherwise.

   New upstream release 4.3.0

   FEATURES:

   - Fix to use getrandom() for randomness, if available.
   - Fix #56: Drop sparse TSIG signing support in NSD. Sign every axfr packet
     with TSIG, according to the latest draft-ietf-dnsop-rfc2845bis-06,
     Section 5.3.1.
   - Merge pull request #59 from buddyns: add FreeBSD support for conf key
     ip-transparent.
   - Add feature to pin server processes to specific cpus.
   - Add feature to pin IP addresses to selected server processes.
   - Set process title to identify individual processes.
   - Merge PR#22: minimise-any: prefer polular and not large RRset, from
     Daisuke Higashi.
   - Add support for SO_BINDTODEVICE on Linux.
   - Add feature to drop queries with opcode UPDATE.

   BUG FIXES:

   - Fix whitespace in nsd.conf.sample.in, patch from Paul Wouters.
   - use-systemd is ignored in nsd.conf, when NSD is compiled with libsystemd
     it always signals readiness, if possible.
   - Note that use-systemd is not necessary and ignored in man page.
   - Fix responses for IXFR so that the authority section is not echoed in
     the response.
   - Fix that the retry wait does not exceed one day for zone transfers.

   - Update keyring as per https://nlnetlabs.nl/people/

   New upstream release 4.2.3:

     * confine-to-zone configures NSD to not return out-of-zone additional
       information.
     * pidfile "" allows to run NSD without a pidfile
     * adds support for readiness notification with READY_FD
     * fix excessive logging of ixfr failures, it stops the log when fallback
       to axfr is possible. log is enabled at high verbosity.
     * The nsd.conf includes are sorted ascending, for include statements
       with a '*' from glob.
     * Fix log address and failure reason with tls handshake errors,
       squelches (the same as unbound) some unless high verbosity is used.
     * Number of different UDP handlers has been reduced to one. recvmmsg and
       sendmmsg implementations are now used on all platforms.
     * Socket options are now set in designated functions for easy reuse.
     * Socket setup has been simplified for easy reuse.
     * Configuration parser is now aware of the context in which an option
       was specified.
     * document that remote-control is a top-level nsd.conf attribute.

   - Remove legacy upgrade of nsd users in %post (boo#1157331)

   New upstream release 4.2.2:

     * Fix #20: CVE-2019-13207 Stack-based Buffer Overflow in the
       dname_concatenate() function.  Reported by Frederic Cambus. It causes
       the zone parser to crash on a malformed zone file, with assertions
       enabled, an assertion catches it.
     * Fix #19: Out-of-bounds read caused by improper validation of array
       index.  Reported by Frederic Cambus.  The zone parser fails on type
       SIG because of mismatched definition with RRSIG.
     * PR #23: Fix typo in nsd.conf man-page.
     * Fix that NSD warns for wrong length of the hash in SSHFP records.
     * Fix #25: NSD doesn't refresh zones after extended downtime, it
       refreshes the old zones.
     * Set no renegotiation on the SSL context to stop client session
       renegotiation.
     * Fix #29: SSHFP check NULL pointer dereference.
     * Fix #30: SSHFP check failure due to missing domain name.
     * Fix to timeval_add in minievent for remaining second in microseconds.
     * PR #31: nsd-control: Add missing stdio header.
     * PR #32: tsig: Fix compilation without HAVE_SSL.
     * Cleanup tls context on xfrd exit.
     * Fix #33: Fix segfault in service of remaining streams on exit.
     * Fix error message for out of zone data to have more information.

   New upstream release 4.2.1:

     * FEATURES:

       - Added num.tls and num.tls6 stat counters.
       - PR #12: send-buffer-size, receive-buffer-size, tcp-reject-overflow
         options for nsd.conf, from Jeroen Koekkoek.
       - Fix #14, tcp connections have 1/10 to be active and have to work
         every second, and then they get time to complete during a reload,
         this is a process that lingers with the old version during a version
         update.

     * BUG FIXES:

       - Fix #13: Stray dot at the end of some log entries, removes dot after
         updated serial number in log entry.
       - Fix TLS cipher selection, the previous was redundant, prefers
         CHACHA20-POLY1305 over AESGCM and was not as readable as it could be.
       - Fix #15: crash in SSL library, initialize variables for TCP access
         when TLS is configured.
       - Fix tls handshake event callback function mistake, reported by
         Mykhailo Danylenko.
       - Fix output of nsd-checkconf -h.

   New upstream release 4.2.0:

     * Implement TCP fast open
     * Added DNS over TLS
     * TLS OCSP stapling support with the tls-service-ocsp option
     * New option hide-identity can be used in nsd.conf to stop NSD from
       responding with the hostname for probe queries that elicit the chaos
       class response, this is conform RFC4892
     * Disable TLS1.0, TLS1.1 and weak ciphers, enable
       CIPHER_SERVER_PREFERENCE

   Update to upstream release 4.1.27:

   * FEATURES:

       - Deny ANY with only one RR in response, by default.  Patch from
         Daisuke Higashi.  The deny-any statement in nsd.conf sets ANY
         queries over UDP to be further moved to TCP as well. Also no
         additional section processig for type ANY, reducing the response
         size.
       - Fix #4215: on-the-fly change of TSIG keys with patch from Igor, adds
         nsd-control print_tsig, update_tsig, add_tsig, assoc_tsig and
         del_tsig.  These changes are gone after reload, edit the config file
         (or a file included from it) to make changes that last after restart.

   * BUG FIXES:

   Update to upstream release 4.1.26:

     * FEATURES:

       - DNSTAP support for NSD, --enable-dnstap and then config in nsd.conf.
       - Support SO_REUSEPORT_LB in FreeBSD 12 with the reuseport: yes
         option in nsd.conf.
       - Added nsd-control changezone.  nsd-control changezone name pattern
         allows the change of a zone pattern option without downtime for the
         zone, in one operation.

     * BUG FIXES:

       - Fix #4194: Zone file parser derailed by non-FQDN names in RHS of
         DNSSEC RRs.
       - Fix #4202: nsd-control delzone incorrect exit code on error.
       - Fix to not set GLOB_NOSORT so the nsd.conf include: files are sorted
         and in a predictable order.
       - Fix #3433: document that reconfig does not change per-zone stats.

   Update to upstream release 4.1.25:

     * FEATURES:

       - nsd-control prints neater errors for file failures.

     * BUG FIXES:

       - Fix that nsec3 precompile deletion happens before the RRs of the
         zone are deleted.
       - Fix printout of accepted remote control connection for unix sockets.
       - Fix use_systemd typo/leftover in remote.c.
       - Fix codingstyle in nsd-checkconf.c in patch from Sharp Liu.
       - append_trailing_slash has one implementation and is not repeated
         differently.
       - Fix coding style in nsd.c
       - Fix to combine the same error function into one, from Xiaobo Liu.
       - Fix initialisation in remote.c.
       - please clang analyzer and fix parse of IPSECKEY with bad gateway.
       - Fix nsd-checkconf fail on bad zone name.
       - Annotate exit functions with noreturn.
       - Remove unused if clause during server service startup.
       - Fix #4156: Fix systemd service manager state change notification
         When it is compiled, systemd readiness signalling is enabled. The
         option in nsd.conf is not used, it is ignored when read.

   Update to upstream release 4.1.24:

   - Features

       * #4102: control interface via local socket
       * configure --enable-systemd (needs pkg-config and libsystemd) can be
         used to then use-systemd: yes in nsd.conf and have readiness
         signalling with systemd.
       * RFC8162 support, for record type SMIMEA.
     - Bug Fixes
       * Patch to fix openwrt for mac os build darwin detection in configure.
       * Fix that first control-interface determines if TLS is used. Warn
         when IP address interfaces are used without TLS.
       * #4106: Fix that stats printed from nsd-control are recast from
         unsigned long to unsigned (remote.c).
       * Fix that type CAA (and URI) in the zone file can contain dots when
         not in quotes.
       * #4133: Fix that when IXFR contains a zone with broken NSEC3PARAM
         chain, NSD leniently attempts to find a working NSEC3PARAM.

   Update to upstream release 4.1.23:

     - Fix NSD time sensitive TSIG compare vulnerability.

   Update to upstream release 4.1.22:

     - Features:
       * refuse-any sends truncation (+TC) in reply to ANY queries
       over UDP, and allows TCP queries like normal.
       * Use accept4 to speed up answer of TCP queries
     - Bug fixes:
       * Fix nsec3 hash of parent and child co-hosted nsec3 enabled zones.
       * Fix to use same condition for nsec3 hash allocation and free.

   - Changes in version 4.1.21:

     - Features:
       * --enable-memclean cleans up memory for use with memory checkers, eg.
         valgrind.
       * refuse-any nsd.conf option that refuses queries of type ANY.
       * lower memory usage for tcp connections, so tcp-count can be higher.
     - Bug fixes:
       * Fix spelling error in xfr-inspect.
       * Fix buffer size warnings from compiler on filename lengths.


Patch Instructions:

   To install this openSUSE Security Update use the SUSE recommended installation methods
   like YaST online_update or "zypper patch".

   Alternatively you can run the command listed for your product:

   - openSUSE Leap 15.2:

      zypper in -t patch openSUSE-2020-2222=1

   - openSUSE Leap 15.1:

      zypper in -t patch openSUSE-2020-2222=1

   - openSUSE Backports SLE-15-SP2:

      zypper in -t patch openSUSE-2020-2222=1

   - openSUSE Backports SLE-15-SP1:

      zypper in -t patch openSUSE-2020-2222=1

   - SUSE Package Hub for SUSE Linux Enterprise 12:

      zypper in -t patch openSUSE-2020-2222=1



Package List:

   - openSUSE Leap 15.2 (x86_64):

      nsd-4.3.4-lp152.2.3.1
      nsd-debuginfo-4.3.4-lp152.2.3.1
      nsd-debugsource-4.3.4-lp152.2.3.1

   - openSUSE Leap 15.1 (x86_64):

      nsd-4.1.27-lp151.2.3.1
      nsd-debuginfo-4.1.27-lp151.2.3.1
      nsd-debugsource-4.1.27-lp151.2.3.1

   - openSUSE Backports SLE-15-SP2 (aarch64 ppc64le s390x x86_64):

      nsd-4.3.4-bp152.2.3.1
      nsd-debuginfo-4.3.4-bp152.2.3.1
      nsd-debugsource-4.3.4-bp152.2.3.1

   - openSUSE Backports SLE-15-SP1 (aarch64 ppc64le s390x x86_64):

      nsd-4.1.27-bp151.3.3.1

   - SUSE Package Hub for SUSE Linux Enterprise 12 (aarch64 ppc64le s390x x86_64):

      nsd-4.3.4-8.1


References:

   https://www.suse.com/security/cve/CVE-2019-13207.html
   https://www.suse.com/security/cve/CVE-2020-28935.html
   https://bugzilla.suse.com/1157331
   https://bugzilla.suse.com/1179191
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