OpenSSL: enable use of TLS 1.3 (with OpenSSL 1.1.0 and later)

[users/jgh/exim.git] / doc / doc-txt / ChangeLog

diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index af186d2e361b3b0279bdb2a404986d16f6c79f8b..5303b2d50a61bc78a6b3c5fbedb4644599f52c2b 100644 (file)
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -5,24 +5,80 @@ affect Exim's operation, with an unchanged configuration file.  For new
 options, and new features, see the NewStuff file next to this ChangeLog.
 
 
 options, and new features, see the NewStuff file next to this ChangeLog.
 
 

-Exim 4.next
-----------
+Exim version 4.92
+-----------------

 
 JH/01 Remove code calling the customisable local_scan function, unless a new
       definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
 
 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
 
 JH/01 Remove code calling the customisable local_scan function, unless a new
       definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
 
 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in

-      non-signal-safe funxtions being used.
+      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/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify.  Fix the
+      report of oldest_pass in ${authres } in consequence, and separate out
+      some descriptions of reasons for verification fail.
+
+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.  Take the opportunity to
+      add more error-checking on spoolfile handling while that code is being
+      messed with.
+
+PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
+      No known attacks, no CVE, this is defensive hardening.
+
+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/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
+      $sender_verify_failure/$recipient_verify_failure to "random".
+
+JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
+      legitimate.

 
 

-Since Exim version 4.90
------------------------
+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/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
+      like zero, since the resolver should be doing this for us, But we need one
+      as a CNAME but no MX presence gets the CNAME returned; we need to check
+      that doesn't point to an MX to declare it "no MX returned" rather than
+      "error, loop".  A new main option is added so the older capability of
+      following some limited number of chain links is maintained.
+
+JH/12 Add client-ip info to non-pass iprev ${authres } lines.
+
+JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
+      methods.  These should support TLS 1.3; they arrived with TLS 1.3 and the
+      now-deprecated earlier definitions used only specified the range up to TLS
+      1.2 (in the older-version library docs).
+
+
+Exim version 4.91
+-----------------

 
 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
 
 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
 
 JH/01 Replace the store_release() internal interface with store_newblock(),
       which internalises the check required to safely use the old one, plus


@@ -154,12 +210,73 @@ 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.
       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 loop, for variables set from spool
-      message files.
+      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.
 
 
 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
 -----------------
 
 Exim version 4.90
 -----------------