3:21 p.m.
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Fedora Update Notification
FEDORA-2018-eb9ca8b218
2018-08-14 20:15:54.627591
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Name : knot-resolver
Product : Fedora 27
Version : 2.4.1
Release : 1.fc27
URL : https://www.knot-resolver.cz/
Summary : Caching full DNS Resolver
Description :
The Knot DNS Resolver is a caching full resolver implementation written in C
and LuaJIT, including both a resolver library and a daemon. Modular
architecture of the library keeps the core tiny and efficient, and provides
a state-machine like API for extensions.
The package is pre-configured as local caching resolver.
To start using it, start a single kresd instance:
$ systemctl start kresd(a)1.service
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Update Information:
Knot Resolver 2.4.1 (2018-08-02) ================================ Security
-------- - fix CVE-2018-10920: Improper input validation bug in DNS resolver
component (security!7, security!9) Bugfixes -------- - cache: fix TTL
overflow in packet due to min_ttl (#388, security!8) - TLS session resumption:
avoid bad scheduling of rotation (#385) - HTTP module: fix a regression in 2.4.0
which broke custom certs (!632) - cache: NSEC3 negative cache even without NS
record (#384) This fixes lower hit rate in NSEC3 zones (since 2.4.0). - minor
TCP and TLS fixes (!623, !624, !626)
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ChangeLog:
* Thu Aug 2 2018 Tomas Krizek <tomas.krizek(a)nic.cz> - 2.4.1-1
Knot Resolver 2.4.1 (2018-08-02)
================================
Security
--------
- fix CVE-2018-10920: Improper input validation bug in DNS resolver component
(security!7, security!9)
Bugfixes
--------
- cache: fix TTL overflow in packet due to min_ttl (#388, security!8)
- TLS session resumption: avoid bad scheduling of rotation (#385)
- HTTP module: fix a regression in 2.4.0 which broke custom certs (!632)
- cache: NSEC3 negative cache even without NS record (#384)
This fixes lower hit rate in NSEC3 zones (since 2.4.0).
- minor TCP and TLS fixes (!623, !624, !626)
* Fri Jul 13 2018 Fedora Release Engineering <releng(a)fedoraproject.org> - 2.4.0-2
- Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild
* Tue Jul 3 2018 Tomas Krizek <tomas.krizek(a)nic.cz> - 2.4.0-1
Knot Resolver 2.4.0 (2018-07-03)
================================
Incompatible changes
--------------------
- minimal libknot version is now 2.6.7 to pull in latest fixes (#366)
Security
--------
- fix a rare case of zones incorrectly dowgraded 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)
* Mon Apr 23 2018 Tomas Krizek <tomas.krizek(a)nic.cz> - 2.3.0-1
Knot Resolver 2.3.0 (2018-04-23)
================================
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)
* Wed Mar 28 2018 Tomas Krizek <tomas.krizek(a)nic.cz> - 2.2.0-1
Knot Resolver 2.2.0 (2018-03-28)
================================
New features
------------
- cache server unavailability to prevent flooding unreachable servers
(Please note that caching algorithm needs further optimization
and will change in further versions but we need to gather operational
experience first.)
Bugfixes
--------
- don't magically -D_FORTIFY_SOURCE=2 in some cases
- allow large responses for outbound over TCP
- fix crash with RR sets with over 255 records
* Mon Feb 26 2018 Tomas Krizek <tomas.krizek(a)nic.cz> - 2.1.1-1
Knot Resolver 2.1.1 (2018-02-23)
================================
Bugfixes
--------
- when iterating, avoid unnecessary queries for NS in insecure parent.
This problem worsened in 2.0.0. (#246)
- prevent UDP packet leaks when using TLS forwarding
- fix the hints module also on some other systems, e.g. Gentoo.
* Fri Feb 16 2018 Tomas Krizek <tomas.krizek(a)nic.cz> - 2.1.0-1
- New upstream release 2.1.0
Knot Resolver 2.1.0 (2018-02-16)
================================
Incompatible changes
--------------------
- stats: remove tracking of expiring records (predict uses another way)
- systemd: more chages in default unit files (TODO)
- ta_sentinel: implement protocol draft-ietf-dnsop-kskroll-sentinel-01
(our draft-ietf-dnsop-kskroll-sentinel-00 implementation had inverted logic)
- libknot: require version 2.6.4 or newer to get bugfixes for DNS-over-TLS
Bugfixes
--------
- detect_time_jump module: don't clear cache on suspend-resume (#284)
- stats module: fix stats.list() returning nothing, regressed in 2.0.0
- policy.TLS_FORWARD: refusal when configuring with multiple IPs (#306)
- cache: fix broken refresh of insecure records that were about to expire
- fix the hints module on some systems, e.g. Fedora (came back on 2.0.0)
- build with older gnutls (conditionally disable features)
- fix the predict module to work with insecure records & cleanup code
Knot Resolver 2.0.0 (2018-01-31)
================================
Incompatible changes
--------------------
- systemd: change unit files to allow running multiple instances,
deployments with single instance now must use `kresd(a)1.service`
instead of `kresd.service`; see kresd.systemd(8) for details
- systemd: the directory for cache is now /var/cache/knot-resolver
- unify default directory and user to `knot-resolver`
- directory with trust anchor file specified by -k option must be writeable
- policy module is now loaded by default to enforce RFC 6761;
see documentation for policy.PASS if you use locally-served DNS zones
- drop support for alternative cache backends memcached, redis,
and for Lua bindings for some specific cache operations
- REORDER_RR option is not implemented (temporarily)
New features
------------
- aggressive caching of validated records (RFC 8198) for NSEC zones;
thanks to ICANN for sponsoring this work.
- forwarding over TLS, authenticated by SPKI pin or certificate.
policy.TLS_FORWARD pipelines queries out-of-order over shared TLS connection
Beware: Some resolvers do not support out-of-order query processing.
TLS forwarding to such resolvers will lead to slower resolution or failures.
- trust anchors: you may specify a read-only file via -K or --keyfile-ro
- trust anchors: at build-time you may set KEYFILE_DEFAULT (read-only)
- ta_sentinel module implements draft ietf-dnsop-kskroll-sentinel-00,
enabled by default
- serve_stale module is prototype, subject to change
- extended API for Lua modules
Bugfixes
--------
- fix build on osx - regressed in 1.5.3 (different linker option name)
* Wed Feb 7 2018 Fedora Release Engineering <releng(a)fedoraproject.org> - 1.5.3-1.1
- Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
* Tue Jan 23 2018 Tomas Krizek <tomas.krizek(a)nic.cz> - 1.5.3-1
- New upstream release 1.5.3
Knot Resolver 1.5.3 (2018-01-23)
================================
Bugfixes
--------
- fix the hints module on some systems, e.g. Fedora.
Symptom: `undefined symbol: engine_hint_root_file`
Knot Resolver 1.5.2 (2018-01-22)
================================
Security
--------
- fix CVE-2018-1000002: insufficient DNSSEC validation, allowing
attackers to deny existence of some data by forging packets.
Some combinations pointed out in RFC 6840 sections 4.1 and 4.3
were not taken into account.
Bugfixes
--------
- memcached: fix fallout from module rename in 1.5.1
Knot Resolver 1.5.1 (2017-12-12)
================================
Incompatible changes
--------------------
- script supervisor.py was removed, please migrate to a real process manager
- module ketcd was renamed to etcd for consistency
- module kmemcached was renamed to memcached for consistency
Bugfixes
--------
- fix SIGPIPE crashes (#271)
- tests: work around out-of-space for platforms with larger memory pages
- lua: fix mistakes in bindings affecting 1.4.0 and 1.5.0 (and 1.99.1-alpha),
potentially causing problems in dns64 and workarounds modules
- predict module: various fixes (!399)
Improvements
------------
- add priming module to implement RFC 8109, enabled by default (#220)
- add modules helping with system time problems, enabled by default;
for details see documentation of detect_time_skew and detect_time_jump
* Fri Jan 5 2018 Tomas Krizek <tomas.krizek(a)nic.cz> - 1.5.0-2
- add doc package
- configure tarball signature verification
- add root.hints file
- use upstream systemd unit files, paths and user name
- migrate configuration to /etc/knot-resolver
- use user knot-resolver
- store cache in /var/cache/knot-resolver
- use systemd alias knot-resolver -> kresd
* Mon Nov 6 2017 Petr ��pa��ek <petr.spacek(a)nic.cz> - 1.5.0-1
- New upstream release 1.5.0
Knot Resolver 1.5.0 (2017-11-02)
================================
Bugfixes
--------
- fix loading modules on Darwin
Improvements
------------
- new module ta_signal_query supporting Signaling Trust Anchor Knowledge
using Keytag Query (RFC 8145 section 5); it is enabled by default
- attempt validation for more records but require it for fewer of them
(e.g. avoids SERVFAIL when server adds extra records but omits RRSIGs)
Knot Resolver 1.4.0 (2017-09-22)
================================
Incompatible changes
--------------------
- lua: query flag-sets are no longer represented as plain integers.
kres.query.* no longer works, and kr_query_t lost trivial methods
'hasflag' and 'resolved'.
You can instead write code like qry.flags.NO_0X20 = true.
Bugfixes
--------
- fix exiting one of multiple forks (#150)
- cache: change the way of using LMDB transactions. That in particular
fixes some cases of using too much space with multiple kresd forks (#240).
Improvements
------------
- policy.suffix: update the aho-corasick code (#200)
- root hints are now loaded from a zonefile; exposed as hints.root_file().
You can override the path by defining ROOTHINTS during compilation.
- policy.FORWARD: work around resolvers adding unsigned NS records (#248)
- reduce unneeded records previously put into authority in wildcarded answers
Knot Resolver 1.3.3 (2017-08-09)
================================
Security
--------
- Fix a critical DNSSEC flaw. Signatures might be accepted as valid
even if the signed data was not in bailiwick of the DNSKEY used to
sign it, assuming the trust chain to that DNSKEY was valid.
Bugfixes
--------
- iterate: skip RRSIGs with bad label count instead of immediate SERVFAIL
- utils: fix possible incorrect seeding of the random generator
- modules/http: fix compatibility with the Prometheus text format
Improvements
------------
- policy: implement remaining special-use domain names from RFC6761 (#205),
and make these rules apply only if no other non-chain rule applies
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References:
[ 1 ] Bug #1610951 - CVE-2018-10920 knot-resolver: Improper input validation bug in DNS
resolver component
https://bugzilla.redhat.com/show_bug.cgi?id=1610951
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2018-eb9ca8b218' at the command
line. For more information, refer to the dnf documentation available at
http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label
All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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