X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/2556b3c619956593f4ac43b30a7b4e15228888d6..d740d2111f189760593a303124ff6b9b1f83453d:/doc/doc-txt/ChangeLog diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog index 06ed2eeb5..d9b896905 100644 --- a/doc/doc-txt/ChangeLog +++ b/doc/doc-txt/ChangeLog @@ -5,15 +5,101 @@ affect Exim's operation, with an unchanged configuration file. For new options, and new features, see the NewStuff file next to this ChangeLog. -Since Exim version 4.90 ------------------------ +Since version 4.91 +------------------ + +JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in + non-signal-safe functions being used. + +JH/03 Bug 2269: When presented with a received message having a stupidly large + number of DKIM-Signature headers, disable DKIM verification to avoid + a resource-consumption attack. The limit is set at twenty. + +JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage + files in the spool were present and unlocked. A queue-runner could spot + them, resulting in a duplicate delivery. Fix that by doing the unlock + after the unlink. Investigation by Tim Stewart. + +JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and + a queue-runner could start a delivery while other operations were ongoing. + Cutthrough delivery was a common victim, resulting in duplicate delivery. + Found and investigated by Tim Stewart. Fix by using the open message data + file handle rather than opening another, and not locally closing it (which + releases a lock) for that case, while creating the temporary .eml format + file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions. + +JH/08 When generating a selfsigned cert, use serial number 1 since zero is not + legitimate. + +JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd. + Previously this would segfault. + +JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would + segfault. + +JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots. + +JH/16 Fix ARC verification to do AS checks in reverse order. + +JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages + using the SMTPUTF8 option on their MAIL FROM commands, in one connection. + Previously the "utf8" would be re-prepended for every additional message. + +JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only + one parent address was copied, and bogus data was used at delivery-logging + time. Either a crash (after delivery) or bogus log data could result. + Discovery and analysis by Tim Stewart. + +JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working. + The ignore_error flag wasn't being returned from the filter subprocess so + was not set for later routers. Investigation and fix by Matthias Kurz. + +JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also + requiring a known-CA anchor certificate; make it now rely entirely on the + TLSA as an anchor. Checking the name on the leaf cert against the name + on the A-record for the host is still done for TA (but not for EE mode). + +JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be + included in delivery lines for non-proxied connections, when compiled with + SUPPORT_SOCKS and running with proxy logging enabled. + +JH/31 Fix a bad use of a copy function, which could be used to pointlessly + copy a string over itself. The library routine is documented as not + supporting overlapping copies, and on MacOS it actually raised a SIGABRT. + +JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the + $authenticated_fail_id variable on authentication failure. Previously + it was unset. + +JH/36 Harden the handling of string-lists. When a list consisted of a sole + "<" character, which should be a list-separator specification, we walked + off past the nul-terimation. + +AM/01 GnuTLS: repeat lowlevel read and write operations while they return error + codes indicating retry. Under TLS1.3 this becomes required. + +JH/41 Fix the loop reading a message header line to check for integer overflow, + and more-often against header_maxsize. Previously a crafted message could + induce a crash of the recive process; now the message is cleanly rejected. + +JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had + been totally disabled for all of 4.91. Discovery and fix by "Mad Alex". + +JH/43 Fix CVE-2019-10149 + + +Exim version 4.91 +----------------- GF/01 DEFER rather than ERROR on redis cluster MOVED response. - When redis_servers is set to a list of > 1 element, and the Redis servers - in that list are in cluster configuration, convert the REDIS_REPLY_ERROR - case of MOVED into a DEFER case instead, thus moving the query onto the - next server in the list. For a cluster of N elements, all N servers must - be defined in redis_servers. + When redis_servers is set to a list of > 1 element, and the Redis servers + in that list are in cluster configuration, convert the REDIS_REPLY_ERROR + case of MOVED into a DEFER case instead, thus moving the query onto the + next server in the list. For a cluster of N elements, all N servers must + be defined in redis_servers. + +GF/02 Catch and remove uninitialized value warning in exiqsumm + Check for existence of @ARGV before looking at $ARGV[0] JH/01 Replace the store_release() internal interface with store_newblock(), which internalises the check required to safely use the old one, plus @@ -135,6 +221,83 @@ JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall the "C=" log element. It can have useful tracking info from the destination system. Patch from Simon Arlott. +JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero- + length value. Previously this would segfault. + +HS/02 Support Avast multiline protoocol, this allows passing flags to + newer versions of the scanner. + +JH/28 Ensure that variables possibly set during message acceptance are marked + dead before release of memory in the daemon loop. This stops complaints + about them when the debug_store option is enabled. Discovered specifically + for sender_rate_period, but applies to a whole set of variables. + Do the same for the queue-runner and queue-list loops, for variables set + from spool message files. Do the same for the SMTP per-message loop, for + certain variables indirectly set in ACL operations. + +JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such + as a multi-recipient message from a mailinglist manager). The coding had + an arbitrary cutoff number of characters while checking for more input; + enforced by writing a NUL into the buffer. This corrupted long / fast + input. The problem was exposed more widely when more pipelineing of SMTP + responses was introduced, and one Exim system was feeding another. + The symptom is log complaints of SMTP syntax error (NUL chars) on the + receiving system, and refused recipients seen by the sending system + (propating to people being dropped from mailing lists). + Discovered and pinpointed by David Carter. + +JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being + replaced by the ${authresults } expansion. + +JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall. + +HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This + allows proper process termination in container environments. + +JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport. + Previously the "final dot" had a newline after it; ensure it is CR,LF. + +JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp" + and "err_perm", deprecated since 4.83 when the RFC-defined words + "temperror" and "permerror" were introduced. + +JH/34 Re-introduce enforcement of no cutthrough delivery on transports having + transport-filters or DKIM-signing. The restriction was lost in the + consolidation of verify-callout and delivery SMTP handling. + Extend the restriction to also cover ARC-signing. + +JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses) + in defer=pass mode supply a 450 to the initiator. Previously the message + would be spooled. + +PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset, + tls_require_ciphers is used as before. + +HS/03 Malware Avast: Better match the Avast multiline protocol. Add + "pass_unscanned". Only tmpfails from the scanner are written to + the paniclog, as they may require admin intervention (permission + denied, license issues). Other scanner errors (like decompression + bombs) do not cause a paniclog entry. + +JH/36 Fix reinitialisation of DKIM logging variable between messages. + Previously it was possible to log spurious information in receive log + lines. + +JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This + triggered odd behaviour from Outlook Express clients. + +PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public + suffix list. + +JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form, + since the IETF WG has not yet settled on that versus the original + "bare" representation. + +JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec. + Previously the millisecond value corrupted the output. + Fix also for syslog_pid=no and log_selector +pid, for which the pid + corrupted the output. + Exim version 4.90 -----------------