Tags give the ability to mark specific points in history as being important
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release-1.22.0
0076736f · ·Unbound 1.22.0 This release has an option to harden against unverified glue, it is enabled with `harden-unverified-glue: yes`. It was contributed by Karthik Umashankar from Microsoft. This protects Unbound against bad glue, that is out of zone, by performing a lookup for it. Because it uses the original information as a last resort if nothing works, it should not give lookup failures, and add protection. There are options to configure the scrubbing for NS records and the CNAME scrubbing and the max global quota lookup limit from previous security fix releases. They can be configured with the options `iter-scrub-ns`, `iter-scrub-cname` and `max-global-quota`. For redis use, with cachedb, it is possible to specify the timeout for the initial connection separately from the timeout for commands. With the options `redis-command-timeout: 20` and `redis-connect-timeout: 200` they can be set separately, for a longer connect attempt, but a short command timeout to keep resolution faster. It is possible to log with ISO8601 format with `log-time-iso: yes` this also logs time in milliseconds. Useful if the server writes to file, syslog may have its own format. DNS over QUIC is support is added, if compiled with libngtcp2 and with the openssl+quic that it uses. Use `--with-libngtcp2` for that, and enable it with `quic-port: 853`. There is a post about it on https://blog.nlnetlabs.nl/dns-over-quic-in-unbound [that is to appear after the release]. Features - Add iter-scrub-ns, iter-scrub-cname and max-global-quota configuration options. - Merge patch to fix for glue that is outside of zone, with `harden-unverified-glue`, from Karthik Umashankar (Microsoft). Enabling this option protects the Unbound resolver against bad glue, that is unverified out of zone glue, by resolving them. It uses the records as last resort if there is no other working glue. - Add redis-command-timeout: 20 and redis-connect-timeout: 200, that can set the timeout separately for commands and the connection set up to the redis server. If they are not specified, the redis-timeout value is used. - Fix #1144: [FR] log timestamps in ISO8601 format with timezone. This adds the option `log-time-iso: yes` that logs in ISO8601 format. - Merge #871: DNS over QUIC. This adds `quic-port: 853` and `quic-size: 8m` that enable dnsoverquic, and the counters `num.query.quic` and `mem.quic` in the statistics output. The feature needs to be enabled by compiling with libngtcp2, with `--with-libngtcp2=path` and libngtcp2 needs openssl+quic, pass that with `--with-ssl=path` to compile unbound as well. Bug Fixes - Fix #1126: unbound-control-setup hangs while testing for openssl presence starting from version 1.21.0. - Add cross platform freebsd, openbsd and netbsd to github ci. - Fix for char signedness warnings on NetBSD. - Fix #1127: error: "memory exhausted" when defining more than 9994 local-zones. - Fix documentation for cache_fill_missing function. - Fix #1130: Loads of logs: "validation failure: key for validation <domain>. is marked as invalid because of a previous" for non-DNSSEC signed zone. - Fix that when rpz is applied the message does not get picked up by the validator. That stops validation failures for the message. - Fix that stub-zone and forward-zone clauses do not exhaust memory for long content. - Unit test for auth zone transfer TLS, and TLS failure. - Fix to print port number in logs for auth zone transfer activities. - Merge #1132: b.root renumbering. - Fix for #1132, adjusted unit test for change in the test file. - Fix for #1132, comment about adjusted copy of reference check. - Merge #1135: Add new IANA trust anchor. - Fix config file read for dnstap-sample-rate. - Fix alloc-size and calloc-transposed-args compiler warnings. - Fix comment to not trigger doxygen unknown command. - Fix to limit NSEC and NSEC3 TTL when aggressive nsec is enabled (RFC9077). - Add unit test for ttl limit for aggressive nsec. - Fix and add comments in testdata/val_negcache_ttl.rpl. - Merge #1140: Fix spelling mistake in comments. - Fix doxygen warnings by commenting out CLANG_ASSISTED_PARSING, CLANG_ADD_INC_PATHS, CLANG_OPTIONS and CLANG_DATABASE_PATH; they were already disabled. - Fix dns64 with prefetch that the prefetch is stored in cache. - Attempt to further fix doh_downstream_buffer_size.tdir flakiness. - More clear text for prefetch and minimal-responses in the unbound.conf man page. - Merge #1143: Fix cache update when serve expired is used. Expired records are favored over resolution and validation failures when serve-expired is used. - Fix negative cache NSEC3 parameter compares for zero length NSEC3 salt. - Fix unbound dnstap socket test program analyzer warnings about unused variable assignments and variable initialization. - Fix #1149: unbound-control-setup hangs sometimes depending on the openssl version. - Fix #1128: Cannot override tcp-upstream and tls-upstream with forward-tcp-upstream and forward-tls-upstream. - Fix to limit NSEC TTL for messages from cachedb. Fix to limit the prefetch ttl for messages after a CNAME with short TTL. - Fix for dnstap compile of doqclient with doq disabled. - Fix cookie_file test sporadic fails for time change during the test. - Fix add reallocarray to alloc stats unit test, and disable override of strdup in unbound-host, and the result of config get option is freed properly. - Fix to disable detection of quic configured ports when quic is not compiled in. - Fix harden-unverified-glue for AAAA cache_fill_missing lookups. - Fix contrib/aaaa-filter-iterator.patch for change in call signature for cache_fill_missing. - Fix to display warning if quic-port is set but dnsoverquic is not enabled when compiled. - Fix dnsoverquic to extend the number of streams when one is closed. - Fix for dnstap with dnscrypt and dnstap without dnsoverquic. - Fix for dnsoverquic and dnstap to use the correct dnstap environment.
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release-1.21.1
b7c61d7c · ·Unbound 1.21.1 This security release fixes CVE-2024-8508. A vulnerability has been discovered in Unbound when handling replies with very large RRsets that Unbound needs to perform name compression for. Malicious upstreams responses with very large RRsets can cause Unbound to spend a considerable time applying name compression to downstream replies. This can lead to degraded performance and eventually denial of service in well orchestrated attacks. The vulnerability can be exploited by a malicious actor querying Unbound for the specially crafted contents of a malicious zone with very large RRsets. Before Unbound replies to the query it will try to apply name compression which was an unbounded operation that could lock the CPU until the whole packet was complete. Unbound version 1.21.1 introduces a hard limit on the number of name compression calculations it is willing to do per packet. Packets that need more compression will result in semi-compressed packets or truncated packets, even on TCP for huge messages, to avoid locking the CPU for long. This change should not affect normal DNS traffic. We would like to thank Toshifumi Sakaguchi for discovering and responsibly disclosing the vulnerability. Bug Fixes: - Fix CVE-2024-8508, unbounded name compression could lead to denial of service.
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release-1.21.0
79e4c578 · ·Unbound 1.21.0 This release has a fix for the CAMP and CacheFlush issues. They have a low severity for Unbound, since it does not affect Unbound so much. The Compositional Amplification (CAMP) type of attacks can lead to DoS attacks against DNS servers. In Unbound legitimate client requests to the resolvers under typical workload are not directly affected by CAMP attacks. However we introduce a global quota for 128 outgoing packets per query (and it's subqueries) that is never reset to prevent the combination of CAMP with other amplification attacks in the future. We would like to thank Huayi Duan, Marco Bearzi, Jodok Vieli, and Cagin Tanir from NetSec group, ETH Zurich for discovering and notifying us about the issue. The CacheFlush type of attacks (NSCacheFlush, CNAMECacheFlush) try to evict cached data by utilizing rogue zones and a steady rogue stream to a resolver. Based on the zone, the stream, the configured cache size and the legitimate traffic, Unbound could experience a degradation of service if a useful entry is evicted and Unbound needs to resolve again. As a mitigation to the NSCacheFlush attack Unbound is setting a limit of 20 RRs in an NS RRset. We would like to thank Yehuda Afek, Anat Bremler-Barr, Shoham Danino and Yuval Shavitt (Tel-Aviv University and Reichman University) for discovering and notifying us about the issue. Other fixes in this release are bug fixes. Also the unbound control commands that flush the cache can clear both the memory and cachedb module cache. The ipset module can use BSD pf tables. The new option `dnstap-sample-rate: 100` can be used to log 1/N messages, for use in high volume server environments where the log server does not keep up. The new DNSSEC key for the root, 38696 from 2024 has been added. It is added to the default root keys in unbound-anchor. The content can be inspected with `unbound-anchor -l`. Older versions of Unbound can keep up with the root key with `auto-trust-anchor-file` that has RFC5011 key rollover. Also unbound-anchor can fetch the keys from the website with a certificate if needed. For cookie secrets, it is possible to perform rollover. The file with cookie secret in use and the staging secret is configured with `cookie-secret-file`. With the remote control the rollover can be performed, add_cookie_secret, activate_cookie_secret, drop_cookie_secret and print_cookie_secrets can be used for that. Compared to the RC1, the release has a fix for module loading on Windows, and a spelling correction. Features - Fix #1071: [FR] Clear both in-memory and cachedb module cache with `unbound-control flush*` commands. - Fix #144: Port ipset to BSD pf tables. - Add dnstap-sample-rate that logs only 1/N messages, for high volume server environments. Thanks Dan Luther. - Add root key 38696 from 2024 for DNSSEC validation. It is added to the default root keys in unbound-anchor. The content can be inspected with `unbound-anchor -l`. - Merge #1090: Cookie secret file. Adds `cookie-secret-file: "unbound_cookiesecrets.txt"` option to store cookie secrets for EDNS COOKIE secret rollover. The remote control add_cookie_secret, activate_cookie_secret and drop_cookie_secret commands can be used for rollover, the command print_cookie_secrets shows the values in use. Bug Fixes - Fix CAMP issues with global quota. Thanks to Huayi Duan, Marco Bearzi, Jodok Vieli, and Cagin Tanir from NetSec group, ETH Zurich. - Fix CacheFlush issues with limit on NS RRs. Thanks to Yehuda Afek, Anat Bremler-Barr, Shoham Danino and Yuval Shavitt (Tel-Aviv University and Reichman University). - Merge #1062: Fix potential overflow bug while parsing port in function cfg_mark_ports. - Fix for #1062: declaration before statement, avoid print of null, and redundant check for array size. - Fix to squelch udp connect errors in the log at low verbosity about invalid argument for IPv6 link local addresses. - Fix when the mesh jostle is exceeded that nameserver targets are marked as resolved, so that the lookup is not stuck on the requestlist. - Add missing common functions to tdir tests. - Merge #1070: Fix rtt assignement for low values of infra-cache-max-rtt. - Merge #1069: Fix unbound-control stdin commands for multi-process Unbounds. - Fix unbound-control commands that read stdin in multi-process operation (local_zones_remove, local_zones, local_datas_remove, local_datas, view_local_datas_remove, view_local_datas). They will be properly distributed to all processes. dump_cache and load_cache are no longer supported in multi-process operation. - Remove testdata/remote-threaded.tdir. testdata/09-unbound-control.tdir now checks both single and multi process/thread operation. - Merge #1073: fix null pointer dereference issue in function ub_ctx_set_fwd. - Fix to print a parse error when config is read with no name for a forward-zone, stub-zone or view. - Fix for parse end of forward-zone, stub-zone and view. - Fix for #1064: Fix that cachedb expired messages are considered insecure, and thus can be served to clients when dnssec is enabled. - Fix #1059: Intermittent DNS blocking failure with local-zone and always_nxdomain. Addition of local_zones dynamically via unbound-control was not finding the zone's parent correctly. - Fix #1064: Unbound 1.20 Cachedb broken? - Fix unused variable warning on compilation with no thread support. - unbound-control-setup: check openssl availability before doing anything, patch from Michael Tokarev. - Update patch to remove 'command' shell builtin and update error text. - Fix to enable that SERVFAIL is cached, for a short period, for more cases. In the cases where limits are exceeded. - Fix spelling of tcp-idle-timeout docs, from Michael Tokarev. - Merge #1078: Only check old pid if no username. - Fix #1079: tags from tagged rpz zones are no longer honored after upgrade from 1.19.3 to 1.20.0. - Fix for #1079: fix RPZ taglist in iterator callback that no client info is like no taglist intersection. - Fix to squelch connection reset by peer errors from log. And fix that the tcp read errors are labeled as initial for the first calls. - Merge #1080: AddressSanitizer detection in tdir tests and memory leak fixes. - Fix memory leak when reload_keep_cache is used and num-threads changes. - Fix memory leak on exit for unbound-dnstap-socket; creates false negatives during testing. - Fix memory leak in setup of dsa sig. - Fix typos for 'the the' in text. - Fix validation for repeated use of a DNAME record. - Add unit test for validation of repeated use of a DNAME record. - Fix #1091: Build fails with OpenSSL >= 3.0 built with OPENSSL_NO_DEPRECATED. - Fix #1092: Ubuntu 22.04 Jammy fails to compile unbound 1.20.0; by adding helpful text for the Python interpreter version and allowing the default pkg-config unavailability error message to be shown. - Fix pkg-config availability check in dnstap/dnstap.m4 and systemd.m4. - Explicitly set the RD bit for the mesh query flags when prefetching. These queries have no waiting client but they need to be treated as recursive. - Fix ip-ratelimit-cookie setting, it was not applied. - Fix to remove unused include from the readzone test program. - Fix unused variable warning in do_cache_remove. - Fix compile warning in worker pthread id printout. - Add unit test skip files and bison and flex output to gitignore. - Fix to use modstack_init in zonemd unit test. - Fix to remove unneeded linebreak in fptr_wlist.c. - Fix compile warnings in fptr_wlist.c. - Fix for repeated use of a DNAME record: first overallocate and then move the exact size of the init value to avoid false positive heap overflow reads from address sanitizers. - Fix to print details about the failure to lookup a DNSKEY record when validation fails due to the missing DNSKEY. Also for key prime and DS lookups. - Fix for neater printout for error for missing DS response. - Fix neater printout. - Fix #1099: Unbound core dump on SIGSEGV. - Fix for #1099: Fix to check for deleted RRset when the contents is updated and fetched after it is stored, and also check for a changed RRset. - Don't check for message TTL changes if the RRsets remain the same. - Fix that validation reason failure that uses string print uses separate buffer that is passed, from the scratch validation buffer. - Fixup algo_needs_reason string buffer length. - Fix shadowed error string variable in validator dnskey handling. - Update list of known EDE codes. - For #773: In contrib/unbound.service.in set unbound to start after network-online.target. Also for contrib/unbound_portable.service.in. - Fix #1103: unbound 1.20.0 segmentation fault with nghttp2. - For #1103: fix to also drop mesh state reference when a h2 reply is dropped. - Add RPZ tag tests in acl_interface.tdir. - For #1102: clearer text for using interface-* options for the loopback interface. - For #1103: fix to also drop mesh state reference when the discard limit is reached, when there is an error making a new recursion state and when the connection is dropped with is_drop. - For #1103: Fix to drop mesh state reference for the http2 stream associated with the reply, not the currently active stream. And it does not remove it twice on a mesh_send_reply call. The reply h2_stream is NULL when not in use, for more initialisation. - Fix dnstap wakeup, a running wakeup timer is left to expire and not increased, a timer is started when the dtio thread is sleeping, the timer set disabled when the dtio thread goes to sleep, and after sleep the thread checks to see if there are messages to log immediately. - Merge #1110: Make fallthrough explicit for libworker.c. - For #1110: Test for fallthrough attribute in configure and add fallthrough attribute annotations. - Fix compile when the compiler does not support the noreturn attribute. - Fix to have empty definition when not supported for weak attribute. - Fix uninitialized variable warning in create_tcp_accept_sock. - Fix link of dnstap without openssl. - Fix link of unbound-dnstap-socket without openssl. - Fix #1106: ratelimit-below-domain logs the wrong FROM address. - Cleanup ede.tdir test. - For #935 and #1104, clarify RPZ order and semantics. - Fix to document parameters of auth_zone_verify_zonemd_with_key. - Fix for #1114: Fix that cache fill for forward-host names is performed, so that with nonzero target-fetch-policy it fetches forwarder addresses and uses them from cache. Also updated that delegation point cache fill routines use CDflag for AAAA message lookups, so that its negative lookup stops a recursion since the cache uses the bit for disambiguation for dns64 but the recursion uses CDflag for the AAAA target lookups, so the check correctly stops a useless recursion by its cache lookup. - Fix dnstap test program, cleans up to have clean memory on exit, for tap_data_free, does not delete NULL items. Also it does not try to free the tail, specifically in the free of the list since that picked up the next item in the list for its loop causing invalid free. Added internal unit test to unbound-dnstap-socket for that. - Fix that the worker mem report with alloc stats does not attempt to print memory use of forwards and hints if they have been deleted already. - Fix that alloc stats has strdup checks, it stops debuggers from complaining about mismatch at free time. - Fix testbound for alloc stats strdup in util/alloc.c. - Fix that alloc stats for forwards and hints are printed, and when alloc stats is enabled, the unit test for unbound control waits for reloads to complete. - Fix that for windows the module startup is called and sets up the module-config. - Fix spelling for the cache-min-negative-ttl entry in the example.conf.
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release-1.20.0
b9525c5f · ·Unbound 1.20.0 This release has a fix for the DNSBomb issue CVE-2024-33655. This has a low severity for Unbound, since it makes Unbound complicit in targeting others, but does not affect Unbound so much. To mitigate the issue new configuration options are introduced. The options `discard-timeout: 1900`, `wait-limit: 1000` and `wait-limit-cookie: 10000` are enabled by default. They limit the number of outstanding queries that a querier can have. This limits the reply pulse, and make Unbound less favorable for the issue. With the config `wait-limit-netblock` and `wait-limit-cookie-netblock` the parameters can be fine tuned for specific destinations. More information on the attack and Unbound's mitigations are presented further down. Other fixes in this release are that Unbound no longer follows symlinks when truncating the pidfile. Unbound also does not chown the pidfile, this is for safety reasons. There are also a number of fixes for RPZ, in handling CNAMEs. There is a memory leak fix for the edns client subnet cache. For DNSSEC validation a case is fixed when the query is of type DNAME. The unbound-anchor program is fixed to first write to a temporary file, before replacing the original. This handles disk full situations, and because of it unbound-anchor needs permission to create that file, in the same directory as the original file. There is also a fix for IP_DONTFRAG, to disable fragmentation instead of the opposite. The option `cache-min-negative-ttl` can be used to set the minimum TTL for negative responses in the cache. It complements existing options to set the maximum ttl for negative responses and to set the minimum and maximum ttl but not specifically for negative responses. The option `cachedb-check-when-serve-expired` option makes Unbound use cachedb to check for expired responses, when `serve-expired` is enabled, and cachedb is used. It is enabled by default. The `-q` option for unbound-checkconf can be added to silence it when there are no errors. The DNSBomb vulnerability CVE-2024-33655. == Summary The DNSBomb attack, via specially timed DNS queries and answers, can cause a Denial of Service on resolvers and spoofed targets. Unbound itself is not vulnerable for DoS, rather it can be used to take part in a pulsing DoS amplification attack. Unbound 1.20.0 includes fixes so the impact of the DoS from Unbound is significantly lower than it used to be and making the attack, and Unbound's participation, less tempting for attackers. == Affected products Unbound up to and including 1.19.3. == Description The DNSBomb attack works by sending low-rate spoofed queries for a malicious zone to Unbound. By controlling the delay of the malicious authoritative answers, Unbound slowly accumulates pending answers for the spoofed addresses. When the authoritative answers become available to Unbound at the same time, Unbound starts serving all the accumulated queries. This results into large-sized, concentrated response bursts to the spoofed addresses. From version 1.20.0 on, Unbound introduces a couple of configuration options to help mitigate the impact. Their complete description can be found in the included manpages but they are also briefly listed here together with their default values for convenience: * discard-timeout: 1900 After 1900 ms a reply to the client will be dropped. Unbound would still work on the query but refrain from replying in order to not accumulate a huge number of "old" replies. Legitimate clients retry on timeouts. * wait-limit: 1000 wait-limit-cookie: 10000 Limits the amount of client queries that require recursion (cache-hits are not counted) per IP address. More recursive queries than the allowed limit are dropped. Clients with a valid EDNS Cookie can have a different limit, higher by default. wait-limit: 0 disables all wait limits. * wait-limit-netblock wait-limit-cookie-netblock These do not have a default value but they can fine grain configuration for specific netblocks. With or without EDNS Cookies. The options above are trying to shrink the DNSBomb window so that the impact of the DoS from Unbound is significantly lower than it used to be and making the attack, and Unbound's participation, less tempting for attackers. == Acknowledgements We would like to thank Xiang Li from the Network and Information Security Lab of Tsinghua University for discovering and disclosing the attack. Features - The config for discard-timeout, wait-limit, wait-limit-cookie, wait-limit-netblock and wait-limit-cookie-netblock was added, for the fix to the DNSBomb issue. - Merge #1027: Introduce 'cache-min-negative-ttl' option. - Merge #1043 from xiaoxiaoafeifei: Add loongarch support; updates config.guess(2024-01-01) and config.sub(2024-01-01), verified with upstream. - Implement cachedb-check-when-serve-expired: yes option, default is enabled. When serve expired is enabled with cachedb, it first checks cachedb before serving the expired response. - Fix #876: [FR] can unbound-checkconf be silenced when configuration is valid? Bug Fixes - Fix for the DNSBomb vulnerability CVE-2024-33655. Thanks to Xiang Li from the Network and Information Security Lab of Tsinghua University for reporting it. - Update doc/unbound.doxygen with 'doxygen -u'. Fixes option deprecation warnings and updates with newer defaults. - Remove unused portion from iter_dname_ttl unit test. - Fix validator classification of qtype DNAME for positive and redirection answers, and fix validator signature routine for dealing with the synthesized CNAME for a DNAME without previously encountering it and also for when the qtype is DNAME. - Fix qname minimisation for reply with a DNAME for qtype CNAME that answers it. - Fix doc test so it ignores but outputs unsupported doxygen options. - Fix #1021 Inconsistent Behavior with Changing rpz-cname-override and doing a unbound-control reload. - Merge #1028: Clearer documentation for tcp-idle-timeout and edns-tcp-keepalive-timeout. - Fix #1029: rpz trigger clientip and action rpz-passthru not working as expected. - Fix rpz that the rpz override is taken in case of clientip triggers. Fix that the clientip passthru action is logged. Fix that the clientip localdata action is logged. Fix rpz override action cname for the clientip trigger. - Fix to unify codepath for local alias for rpz cname action override. - Fix rpz for cname override action after nsdname and nsip triggers. - Fix that addrinfo is not kept around but copied and freed, so that log-destaddr uses a copy of the information, much like NSD does. - Merge #1030: Persist the openssl and expat directories for repeated Windows builds. - Fix that rpz CNAME content is limited to the max number of cnames. - Fix rpz, it follows iterator CNAMEs for nsip and nsdname and sets the reply query_info values, that is better for debug logging. - Fix rpz that copies the cname override completely to the temp region, so there are no references to the rpz region. - Add rpz unit test for nsip action override. - Fix rpz for qtype CNAME after nameserver trigger. - Fix rpz so that rpz CNAME can apply after rpz CNAME. And fix that clientip and nsip can give a CNAME. - Fix localdata and rpz localdata to match CNAME only if no direct type match is available. - Merge #831 from Pierre4012: Improve Windows NSIS installer script (setup.nsi). - For #831: Format text, use exclamation icon and explicit label names. - Fix name of unit test for subnet cache response. - Fix #1032: The size of subnet_msg_cache calculation mistake cause memory usage increased beyond expectations. - Fix for #1032, add safeguard to make table space positive. - Fix comment in lruhash space function. - Fix to add unit test for lruhash space that exercises the routines. - Fix that when the server truncates the pidfile, it does not follow symbolic links. - Fix that the server does not chown the pidfile. - Fix #1034: DoT forward-zone via unbound-control. - Fix for crypto related failures to have a better error string. - Fix #1035: Potential Bug while parsing port from the "stub-host" string; also affected forward-zones and remote-control host directives. - Fix #369: dnstap showing extra responses; for client responses right from the cache when replying with expired data or prefetching. - Fix #1040: fix heap-buffer-overflow issue in function cfg_mark_ports of file util/config_file.c. - For #1040: adjust error text and disallow negative ports in other parts of cfg_mark_ports. - Fix comment syntax for view function views_find_view. - Fix #595: unbound-anchor cannot deal with full disk; it will now first write out to a temp file before replacing the original one, like Unbound already does for auto-trust-anchor-file. - Fixup compile without cachedb. - Add test for cachedb serve expired. - Extended test for cachedb serve expired. - Fix makefile dependencies for fake_event.c. - Fix cachedb for serve-expired with serve-expired-reply-ttl. - Fix to not reply serve expired unless enabled for cachedb. - Fix cachedb for serve-expired with serve-expired-client-timeout. - Fixup unit test for cachedb server expired client timeout with a check if response if from upstream or from cachedb. - Fixup cachedb to not refetch when serve-expired-client-timeout is used. - Merge #1049 from Petr Menšík: Py_NoSiteFlag is not needed since Python 3.8 - Fix #1048: Update ax_pkg_swig.m4 and ax_pthread.m4. - Fix configure, autoconf for #1048. - Add checklock feature verbose_locking to trace locks and unlocks. - Fix edns subnet to sort rrset references when storing messages in the cache. This fixes a race condition in the rrset locks. - Merge #1053: Remove child delegations from cache when grandchild delegations are returned from parent. - Fix ci workflow for macos for moved install locations. - Fix configure flto check error, by finding grep for it. - Merge #1041: Stub and Forward unshare. This has one structure for them and fixes #1038: fatal error: Could not initialize thread / error: reading root hints. - Fix to disable fragmentation on systems with IP_DONTFRAG, with a nonzero value for the socket option argument. - Fix doc unit test for out of directory build. - Fix cachedb with serve-expired-client-timeout disabled. The edns subnet module deletes global cache and cachedb cache when it stores a result, and serve-expired is enabled, so that the global reply, that is older than the ecs reply, does not return after the ecs reply expires. - Add unit tests for cachedb and subnet cache expired data. - Man page entry for unbound-checkconf -q. - Cleanup unnecessary strdup calls for EDE strings. - Fix doxygen comment for errinf_to_str_bogus.
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release-1.19.3
48b6c60a · ·Unbound 1.19.3 This release has a number of bug fixes. The CNAME synthesized for a DNAME record uses the original TTL, of the DNAME record, and that means it can be cached for the TTL, instead of 0. There is a fix that when a message was stored in cache, but one of the RRsets was not updated due to cache policy, it now restricts the message TTL if the cache version of the RRset has a shorter TTL. It avoids a bug where the message is not expired, but its contents is expired. For dnstap, it logs type DoH and DoT correctly, if that is used for the message. The b.root-servers.net address is updated in the default root hints. When performing retries for failed sends, a retry at a smaller UDP size is now not performed when that attempt is not actually smaller, and at defaults, since the flag day changes, it is the same size. This makes it skip the step, it is useless because there is no reduction in size. Clients with a valid DNS Cookie will bypass the ratelimit, if one is set. The value from ip-ratelimit-cookie is used for these queries. Furthermore there is a fix to make correct EDE Prohibited answers for access control denials, and a fix for EDNS client subnet scope zero answers. Features: - Merge PR #973: Use the origin (DNAME) TTL for synthesized CNAMEs as per RFC 6672. Bug Fixes: - Fix unit test parse of origin syntax. - Use 127.0.0.1 explicitly in tests to avoid delays and errors on newer systems. - Fix #964: config.h.in~ backup file in release tar balls. - Merge #968: Replace the obsolescent fgrep with grep -F in tests. - Merge #971: fix 'WARNING: Message has 41 extra bytes at end'. - Fix #969: [FR] distinguish Do53, DoT and DoH in the logs. - Fix dnstap that assertion failed on logging other than UDP and TCP traffic. It lists it as TCP traffic. - Fix to sync the tests script file common.sh. - iana portlist update. - Updated IPv4 and IPv6 address for b.root-servers.net in root hints. - Update test script file common.sh. - Fix tests to use new common.sh functions, wait_logfile and kill_from_pidfile. - Fix #974: doc: default number of outgoing ports without libevent. - Merge #975: Fixed some syntax errors in rpl files. - Fix root_zonemd unit test, it checks that the root ZONEMD verifies, now that the root has a valid ZONEMD. - Update example.conf with cookie options. - Merge #980: DoH: reject non-h2 early. To fix #979: Improve errors for non-HTTP/2 DoH clients. - Merge #985: Add DoH and DoT to dnstap message. - Fix #983: Sha1 runtime insecure change was incomplete. - Remove unneeded newlines and improve indentation in remote control code. - Merge #987: skip edns frag retry if advertised udp payload size is not smaller. - Fix unit test for #987 change in udp1xxx retry packet send. - Merge #988: Fix NLnetLabs#981: dump_cache truncates large records. - Fix to link with -lcrypt32 for OpenSSL 3.2.0 on Windows. - Fix to link with libssp for libcrypto and getaddrinfo check for only header. Also update crosscompile to remove ssp for 32bit. - Merge #993: Update b.root-servers.net also in example config file. - Update workflow for ports to use newer openssl on windows compile. - Fix warning for windres on resource files due to redefinition. - Fix for #997: Print details for SSL certificate failure. - Update error printout for duplicate trust anchors to include the trust anchor name (relates to #920). - Update message TTL when using cached RRSETs. It could result in non-expired messages with expired RRSETs (non-usable messages by Unbound). - Merge #999: Search for protobuf-c with pkg-config. - Fix #1006: Can't find protobuf-c package since #999. - Fix documentation for access-control in the unbound.conf man page. - Merge #1010: Mention REFUSED has the TC bit set with unmatched allow_cookie acl in the manpage. It also fixes the code to match the documentation about clients with a valid cookie that bypass the ratelimit regardless of the allow_cookie acl. - Document the suspend argument for process_ds_response(). - Move github workflows to use checkoutv4. - Fix edns subnet replies for scope zero answers to not get stored in the global cache, and in cachedb, when the upstream replies without an EDNS record. - Fix for #1022: Fix ede prohibited in access control refused answers. - Fix unbound-control-setup.cmd to use 3072 bits so that certificates are long enough for newer OpenSSL versions. - Fix TTL of synthesized CNAME when a DNAME is used from cache. - Fix unbound-control-setup.cmd to have CA v3 basicConstraints, like unbound-control-setup.sh has.
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