Unbound 1.13.0rc1 pre-release

Tue Nov 24 15:45:26 UTC 2020

Hi Wouter,

Sorry this update just crashes...

This is the tail of the log file - I have a complete log if required.

BTW does this new release include a fix for my RPZ issue that George was looking at?

24/11/2020 15:41:08 unbound.exe[13260:2] info: sending query: www.tm.lg.prod.aadmsa.akadns.net. A IN
24/11/2020 15:41:08 unbound.exe[13260:2] debug: sending to target: <.> 8.8.8.8#853
24/11/2020 15:41:08 unbound.exe[13260:2] debug: dnssec status: not expected
24/11/2020 15:41:08 unbound.exe[13260:2] debug: pending_tcp_query
24/11/2020 15:41:08 unbound.exe[13260:2] debug: reuse_tcp_find
24/11/2020 15:41:08 unbound.exe[13260:2] debug: reuse_tcp_find: num reuse streams 45
24/11/2020 15:41:08 unbound.exe[13260:2] debug: reuse_tcp_find check inexact match
24/11/2020 15:41:08 unbound.exe[13260:2] debug: reuse_tcp_close_oldest
24/11/2020 15:41:08 unbound.exe[13260:2] debug: decommission_pending_tcp
24/11/2020 15:41:08 unbound.exe[13260:2] debug: bio_cb 3, before read 
24/11/2020 15:41:08 unbound.exe[13260:2] debug: bio_cb 131, return read 
24/11/2020 15:41:08 unbound.exe[13260:2] debug: bio_cb 6, before read 
24/11/2020 15:41:08 unbound.exe[13260:2] debug: bio_cb 134, return read 
24/11/2020 15:41:08 unbound.exe[13260:2] debug: bio_cb 1, before write 
24/11/2020 15:41:08 unbound.exe[13260:2] debug: comm_point_close of 808: event_del
24/11/2020 15:41:08 unbound.exe[13260:2] debug: event_del 00000000075033A0 added=1 fd=808 tv=1606232526623  EV_READ EV_TIMEOUT
24/11/2020 15:41:08 unbound.exe[13260:2] debug: winsock: tcp wouldblock EV_READ
24/11/2020 15:41:08 unbound.exe[13260:2] debug: winsock: tcp wouldblock EV_WRITE
24/11/2020 15:41:08 unbound.exe[13260:2] debug: close fd 808
24/11/2020 15:41:08 unbound.exe[13260:2] debug: reuse_tcp_remove_tree_list
24/11/2020 15:41:08 unbound.exe[13260:2] fatal error: util/rbtree.c:324: change_child_ptr: assertion child->parent == old || child->parent == new failed

-----Original Message-----
From: Wouter Wijngaards <wouter at nlnetlabs.nl> 
Sent: 24 November 2020 14:29
To: unbound-users at nlnetlabs.nl; maintainers at nlnetlabs.nl
Subject: Unbound 1.13.0rc1 pre-release

Hi,

Unbound 1.13.0rc1 pre-release is available:
https://nlnetlabs.nl/downloads/unbound/unbound-1.13.0rc1.tar.gz
sha256 a55e8b5dfc290867017e7fbb75f1023ee2f6234943f870a5c24694b0908d7c17
pgp https://nlnetlabs.nl/downloads/unbound/unbound-1.13.0rc1.tar.gz.asc

This version has fixes to connect for UDP sockets, slowing down potential ICMP side channel leakage.  The fix can be controlled with the option udp-connect: yes, it is enabled by default.

Additionally CVE-2020-28935 is fixed, this solves a problem where the pidfile is altered by a symlink, and fails if a symlink is encountered.
See https://nlnetlabs.nl/downloads/unbound/CVE-2020-28935.txt for more information.

New features are upstream TCP and TLS query reuse, where a channel is reused for several queries.  And http-notls-downstream: yesno for unencrypted DoH, useful for back end support servers.  The option infra-keep-probing can be used to probe hosts that are down more frequently.

The options edns-client-string and edns-client-string-opcode can be used to add an EDNS option with the specified string in queries towards servers, with the servers specified by IP address.  It replaces the edns-client-tag option.

Features
- Pass the comm_reply information to the inplace_cb_reply* functions
  during the mesh state and update the documentation on that.
- Fix #330: [Feature request] Add unencrypted DNS over HTTPS support.
  This adds the option http-notls-downstream: yesno to change that,
  and the dohclient test code has the -n option.
- Merge PR #228 : infra-keep-probing option to probe hosts that are
  down.  Add infra-keep-probing: yes option. Hosts that are down are
  probed more frequently.
  With the option turned on, it probes about every 120 seconds,
  eventually after exponential backoff, and that keeps that way. If
  traffic keeps up for the domain. It probes with one at a time, eg.
  one query is allowed to probe, other queries within that 120 second
  interval are turned away.
- Merge PR #313 from Ralph Dolmans: Replace edns-client-tag with
  edns-client-string option.
- Merge PR #283 : Stream reuse.  This implements upstream stream
  reuse for performing several queries over the same TCP or TLS
  channel.
- Fix to connect() to UDP destinations, default turned on,
  this lowers vulnerability to ICMP side channels.
  Option to toggle udp-connect, default is enabled.

Bug Fixes
- Fix #319: potential memory leak on config failure, in rpz config.
- Fix dnstap socket and the chroot not applied properly to the dnstap
  socket path.
- Fix warning in libnss compile, nss_buf2dsa is not used without DSA.
- Fix #323: unbound testsuite fails on mock build in systemd-nspawn
  if systemd support is build.
- Fix for python reply callback to see mesh state reply_list member,
  it only removes it briefly for the commpoint call so that it does
  not drop it and attempt to modify the reply list during reply.
- Fix that if there are on reply callbacks, those are called per
  reply and a new message created if that was modified by the call.
- Free up auth zone parse region after use for lookup of host
- Merge PR #326 from netblue30: DoH: implement content-length
  header field.
- DoH content length, simplify code, remove declaration after
  statement and fix cast warning.
- Fix that if there are reply callbacks for the given rcode, those
  are called per reply and a new message created if that was modified
  by the call.
- Fix that the out of order TCP processing does not limit the
  number of outstanding queries over a connection.
- Fix python documentation warning on functions.rst inplace_cb_reply.
- Log ip address when http session recv fails, eg. due to tls fail.
- Fix to set the tcp handler event toggle flag back to default when
  the handler structure is reused.
- Clean the fix for out of order TCP processing limits on number
  of queries.  It was tested to work.
- Fix that http settings have colon in set_option, for
  http-endpoint, http-max-streams, http-query-buffer-size,
  http-response-buffer-size, and http-nodelay.
- Fix memory leak of https port string when reading config.
- local-zone regional allocations outside of chunk
- Merge PR #324 from James Renken: Add modern X.509v3 extensions to
  unbound-control TLS certificates.
- Fix for PR #324 to attach the x509v3 extensions to the client
  certificate.
- Fix #327: net/if.h check fails on some darwin versions; contribution by
  Joshua Root.
- Fix #320: potential memory corruption due to size miscomputation upton
  custom region alloc init.
- Fix #333: Unbound Segmentation Fault w/ log_info Functions From
  Python Mod.
- Fix that minimal-responses does not remove addresses from a priming
  query response.
- In man page note that tls-cert-bundle is read before permission
  drop and chroot.
- Fix #341: fixing a possible memory leak.
- Fix memory leak after fix for possible memory leak failure.
- Fix #343: Fail to build --with-libnghttp2 with error: 'SSIZE_MAX'
  undeclared.
- Fix for #303 CVE-2020-28935 : Fix that symlink does not interfere
  with chown of pidfile.
- Fix #347: IP_DONTFRAG broken on Apple xcode 12.2.
- Fix #350: with the AF_NETLINK permission, to fix 1.12.0 error:
  failed to list interfaces: getifaddrs: Address family not
  supported by protocol.
- Merge #351 from dvzrv: Add AF_NETLINK to set of allowed socket
  address families.
- iana portlist updated.

Best regards, Wouter