Hello,
this is pre-release announcement. We are going to release Knot Resolver
4.1.0 with two security fixes on Wednesday 2019-07-10. This release
includes fixes for CVE-2019-10190 and CVE-2019-10191.
We advise all users to upgrade to version 4.1.0 as soon as possible.
Version 4.1.0 is fully is compatible with version 4.0.0 and no manual
steps are required during upgrade.
Pre-built software packages and source code will be made available from
https://www.knot-resolver.cz/download/
during Wednesday 2019-07-10.
Customers with formal support contracts with CZ.NIC can receive fixes
immediatelly.
Software packages provided by Linux distributions (i.e. not supplied by
CZ.NIC) will follow usual release cycle of respective vendors. CZ.NIC
cannot guarantee availability and timeline related to fixes in these
packages. Nevertheless, following vendors received security patches in
advance:
ALT Linux, Amazon Linux AMI, Arch Linux, Chrome OS, CloudLinux, CoreOS,
Debian, Gentoo, Openwall, Oracle, Red Hat, Slackware, SUSE, Ubuntu, Wind
River.
Please send your questions to mailing list
knot-resolver-users(a)lists.nic.cz.
--
Petr Špaček @ CZ.NIC
Dear Knot Resolver users,
Knot Resolver 4.0.0 has been released!
This is a major release with many improvements and also some breaking
changes, please see our upgrading guide:
https://knot-resolver.readthedocs.io/en/stable/upgrading.html
Those interested in DNS-over-HTTPS are welcome to look for unintentional
Easter Bugs we may have accidentally hidden in our experimental
implementation. Upstream packages with DNS-over-HTTPS support are
available for Debian 9, CentOS 7, Ubuntu 18, Fedora and Arch.
Incompatible changes
--------------------
- see upgrading guide:
https://knot-resolver.readthedocs.io/en/stable/upgrading.html
- configuration: trust_anchors aliases .file, .config() and .negative
were removed (!788)
- configuration: trust_anchors.keyfile_default is no longer accessible
(!788)
- daemon: -k/--keyfile and -K/--keyfile-ro options were removed
- meson build system is now used for builds (!771)
- build with embedded LMBD is no longer supported
- default modules dir location has changed
- DNSSEC is enabled by default
- upstream packages for Debian now require systemd
- libknot >= 2.8 is required
- net.list() output format changed (#448)
- net.listen() reports error when address-port pair is in use
- bind to DNS-over-TLS port by default (!792)
- stop versioning libkres library
- default port for web management and APIs changed to 8453
Improvements
------------
- policy.TLS_FORWARD: if hostname is configured, send it on wire (!762)
- hints module: allow configuring the TTL and change default from 0 to 5s
- policy module: policy.rpz() will watch the file for changes by default
- packaging: lua cqueues added to default dependencies where available
- systemd: service is no longer auto-restarted on configuration errors
- always send DO+CD flags upstream, even in insecure zones (#153)
- cache.stats() output is completely new; see docs (!775)
- improve usability of table_print() (!790, !801)
- add DNS-over-HTTPS support (#280)
- docker image supports and exposes DNS-over-HTTPS
Bugfixes
--------
- predict module: load stats module if config didn't specify period (!755)
- trust_anchors: don't do 5011-style updates on anchors from files
that were loaded as unmanaged trust anchors (!753)
- trust_anchors.add(): include these TAs in .summary() (!753)
- policy module: support '#' for separating port numbers, for consistency
- fix startup on macOS+BSD when </dev/null and cqueues installed
- policy.RPZ: log problems from zone-file level of parser as well (#453)
- fix flushing of messages to logs in some cases (notably systemd) (!781)
- fix fallback when SERVFAIL or REFUSED is received from upstream (!784)
- fix crash when dealing with unknown TA key algorhitm (#449)
- go insecure due to algorithm support even if DNSKEY is NODATA (!798)
- fix mac addresses in the output of net.interfaces() command (!804)
- http module: fix too early renewal of ephemeral certificates (!808)
Module API changes
------------------
- kr_straddr_split() changed API a bit (compiler will catch that)
- C modules defining `*_layer` or `*_props` symbols need to change a bit
See the upgrading guide for details. It's detected on module load.
Full changelog:
https://gitlab.labs.nic.cz/knot/knot-resolver/raw/v4.0.0/NEWS
Sources:
https://secure.nic.cz/files/knot-resolver/knot-resolver-4.0.0.tar.xz
GPG signature:
https://secure.nic.cz/files/knot-resolver/knot-resolver-4.0.0.tar.xz.asc
Documentation:
https://knot-resolver.readthedocs.io/en/v4.0.0/
--
Tomas Krizek
PGP: 4A8B A48C 2AED 933B D495 C509 A1FB A5F7 EF8C 4869
Dear Knot Resolver users,
Knot Resolver 3.2.1 has been released.
Bugfixes
--------
- trust_anchors: respect validity time range during TA bootstrap (!748)
- fix TLS rehandshake handling (!739)
- make TLS_FORWARD compatible with GnuTLS 3.3 (!741)
- special thanks to Grigorii Demidov for his long-term work on Knot
Resolver!
Improvements
------------
- improve handling of timeouted outgoing TCP connections (!734)
- trust_anchors: check syntax of public keys in DNSKEY RRs (!748)
- validator: clarify message about bogus non-authoritative data (!735)
- dnssec validation failures contain more verbose reasoning (!735)
- new function trust_anchors.summary() describes state of DNSSEC TAs (!737),
and logs new state of trust anchors after start up and automatic changes
- trust anchors: refuse revoked DNSKEY even if specified explicitly,
and downgrade missing the SEP bit to a warning
Full changelog:
https://gitlab.labs.nic.cz/knot/knot-resolver/raw/v3.2.1/NEWS
Sources:
https://secure.nic.cz/files/knot-resolver/knot-resolver-3.2.1.tar.xz
GPG signature:
https://secure.nic.cz/files/knot-resolver/knot-resolver-3.2.1.tar.xz.asc
Documentation:
https://knot-resolver.readthedocs.io/en/v3.2.1/
--
Tomas Krizek
PGP: 4A8B A48C 2AED 933B D495 C509 A1FB A5F7 EF8C 4869
Dear Knot Resolver users,
Knot Resolver 3.2.0 has been released.
New features
------------
- module edns_keepalive to implement server side of RFC 7828 (#408)
- module nsid to implement server side of RFC 5001 (#289)
- module bogus_log provides .frequent() table (!629, credit Ulrich Wisser)
- module stats collects flags from answer messages (!629, credit Ulrich
Wisser)
- module view supports multiple rules with identical address/TSIG
specification
and keeps trying rules until a "non-chain" action is executed (!678)
- module experimental_dot_auth implements an DNS-over-TLS to auth protocol
(!711, credit Manu Bretelle)
- net.bpf bindings allow advanced users to use eBPF socket filters
Bugfixes
--------
- http module: only run prometheus in parent process if using --forks=N,
as the submodule collects metrics from all sub-processes as well.
- TLS fixes for corner cases (!700, !714, !716, !721, !728)
- fix build with -DNOVERBOSELOG (#424)
- policy.{FORWARD,TLS_FORWARD,STUB}: respect net.ipv{4,6} setting (!710)
- avoid SERVFAILs due to certain kind of NS dependency cycles, again
(#374) this time seen as 'circular dependency' in verbose logs
- policy and view modules do not overwrite result finished requests (!678)
Improvements
------------
- Dockerfile: rework, basing on Debian instead of Alpine
- policy.{FORWARD,TLS_FORWARD,STUB}: give advantage to IPv6
when choosing whom to ask, just as for iteration
- use pseudo-randomness from gnutls instead of internal ISAAC (#233)
- tune the way we deal with non-responsive servers (!716, !723)
- documentation clarifies interaction between policy and view modules
(!678, !730)
Module API changes
------------------
- new layer is added: answer_finalize
- kr_request keeps ::qsource.packet beyond the begin layer
- kr_request::qsource.tcp renamed to ::qsource.flags.tcp
- kr_request::has_tls renamed to ::qsource.flags.tls
- kr_zonecut_add(), kr_zonecut_del() and kr_nsrep_sort() changed
parameters slightly
Full changelog:
https://gitlab.labs.nic.cz/knot/knot-resolver/raw/v3.2.0/NEWS
Sources:
https://secure.nic.cz/files/knot-resolver/knot-resolver-3.2.0.tar.xz
GPG signature:
https://secure.nic.cz/files/knot-resolver/knot-resolver-3.2.0.tar.xz.asc
Documentation:
https://knot-resolver.readthedocs.io/en/v3.2.0/
--
Tomas Krizek
PGP: 4A8B A48C 2AED 933B D495 C509 A1FB A5F7 EF8C 4869
Dear Knot Resolver users,
Knot Resolver 3.0.0 has been released.
Incompatible changes
--------------------
- cache: fail lua operations if cache isn't open yet (!639)
By default cache is opened *after* reading the configuration,
and older versions were silently ignoring cache operations.
Valid configuration must open cache using `cache.open()` or
`cache.size =` before executing cache operations like `cache.clear()`.
- libknot >= 2.7.1 is required, which brings also larger API changes
- in case you wrote custom Lua modules, please consult
https://knot-resolver.readthedocs.io/en/latest/lib.html#incompatible-change…
- in case you wrote custom C modules, please see compile against
Knot DNS 2.7 and adjust your module according to messages from C
compiler
- DNS cookie module (RFC 7873) is not available in this release,
it will be later reworked to reflect development in IEFT dnsop working
group
- version module was permanently removed because it was not really used
by users; if you want to receive notifications about new releases
please subscribe to
https://lists.nic.cz/cgi-bin/mailman/listinfo/knot-resolver-announce
Bugfixes
--------
- fix multi-process race condition in trust anchor maintenance (!643)
- ta_sentinel: also consider static trust anchors not managed via
RFC 5011
Improvements
------------
- reorder_RR() implementation is brought back
- bring in performace improvements provided by libknot 2.7
- cache.clear() has a new, more powerful API
- cache documentation was improved
- old name "Knot DNS Resolver" is replaced by unambiguous "Knot
Resolver" to prevent confusion with "Knot DNS" authoritative server
Full changelog:
https://gitlab.labs.nic.cz/knot/knot-resolver/raw/v3.0.0/NEWS
Sources:
https://secure.nic.cz/files/knot-resolver/knot-resolver-3.0.0.tar.xz
GPG signature:
https://secure.nic.cz/files/knot-resolver/knot-resolver-3.0.0.tar.xz.asc
Documentation:
https://knot-resolver.readthedocs.io/en/v3.0.0/
--
Tomas Krizek
PGP: 4A8B A48C 2AED 933B D495 C509 A1FB A5F7 EF8C 4869
Dear Knot Resolver users,
Knot Resolver 2.4.0 has been released.
Incompatible changes
--------------------
- minimal libknot version is now 2.6.7 to pull in latest fixes (#366)
Security
--------
- fix a rare case of zones incorrectly downgraded to insecure status
(!576)
New features
------------
- TLS session resumption (RFC 5077), both server and client (!585, #105)
(disabled when compiling with gnutls < 3.5)
- TLS_FORWARD policy uses system CA certificate store by default (!568)
- aggressive caching for NSEC3 zones (!600)
- optional protection from DNS Rebinding attack (module rebinding, !608)
- module bogus_log to log DNSSEC bogus queries without verbose logging
(!613)
Bugfixes
--------
- prefill: fix ability to read certificate bundle (!578)
- avoid turning off qname minimization in some cases, e.g. co.uk. (#339)
- fix validation of explicit wildcard queries (#274)
- dns64 module: more properties from the RFC implemented (incl.
bug #375)
Improvements
------------
- systemd: multiple enabled kresd instances can now be started using
kresd.target
- ta_sentinel: switch to version 14 of the RFC draft (!596)
- support for glibc systems with a non-Linux kernel (!588)
- support per-request variables for Lua modules (!533)
- support custom HTTP endpoints for Lua modules (!527)
Full changelog:
https://gitlab.labs.nic.cz/knot/knot-resolver/raw/v2.4.0/NEWS
Sources:
https://secure.nic.cz/files/knot-resolver/knot-resolver-2.4.0.tar.xz
GPG signature:
https://secure.nic.cz/files/knot-resolver/knot-resolver-2.4.0.tar.xz.asc
Documentation:
https://knot-resolver.readthedocs.io/en/v2.4.0/
--
Tomas Krizek
PGP: 4A8B A48C 2AED 933B D495 C509 A1FB A5F7 EF8C 4869
Dear Knot Resolver users,
Knot Resolver 2.3.0 has been released. This is a security release that
fixes CVE-2018-1110.
We're also introducing a new mailing list, knot-resolver-announce. Only
notifications about new releases or important announcements will be
posted there.
https://lists.nic.cz/cgi-bin/mailman/listinfo/knot-resolver-announce
Security
--------
- fix CVE-2018-1110: denial of service triggered by malformed DNS
messages (!550, !558, security!2, security!4)
- increase resilience against slow lorris attack (security!5)
Bugfixes
--------
- validation: fix SERVFAIL in case of CNAME to NXDOMAIN in a single
zone (!538)
- validation: fix SERVFAIL for DS . query (!544)
- lib/resolve: don't send unecessary queries to parent zone (!513)
- iterate: fix validation for zones where parent and child share
NS (!543)
- TLS: improve error handling and documentation (!536, !555, !559)
Improvements
------------
- prefill: new module to periodically import root zone into cache
(replacement for RFC 7706, !511)
- network_listen_fd: always create end point for supervisor supplied
file descriptor
- use CPPFLAGS build environment variable if set (!547)
Full changelog:
https://gitlab.labs.nic.cz/knot/knot-resolver/raw/v2.3.0/NEWS
Sources:
https://secure.nic.cz/files/knot-resolver/knot-resolver-2.3.0.tar.xz
GPG signature:
https://secure.nic.cz/files/knot-resolver/knot-resolver-2.3.0.tar.xz.asc
Documentation:
https://knot-resolver.readthedocs.io/en/v2.3.0/
--
Tomas Krizek
PGP: 4A8B A48C 2AED 933B D495 C509 A1FB A5F7 EF8C 4869
