[Dovecot-news] v2.3.9 released

[Aki Tuomi]

Hi all!

We are pleased to release v2.3.9 of Dovecot. Please find it from
locations below

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Aki Tuomi
Open-Xchange oy

https://dovecot.org/releases/2.3/dovecot-2.3.9.tar.gz
https://dovecot.org/releases/2.3/dovecot-2.3.9.tar.gz.sig
Binary packages in https://repo.dovecot.org/
Docker images in https://hub.docker.com/r/dovecot/dovecot

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* Changed several event field names for consistency and to avoid
  conflicts in parent-child event relationships:
   * SMTP server command events: Renamed "name" to "cmd_name"
   * Events inheriting from a mailbox: Renamed "name" to "mailbox"
   * Server connection events have only "remote_ip", "remote_port",
     "local_ip" and "local_port".
   * Removed duplicate "client_ip", "ip" and "port".
   * Mail storage events: Removed "service" field.
     Use "service:<name>" category instead.
   * HTTP client connection events: Renamed "host" to "dest_host" and
     "port" to "dest_port"
* auth: Drop Postfix socketmap support. It hasn't been working
  with recent Postfix versions for a while now.
* push-notification-lua: The "subject" field is now decoded to UTF8
  instead of kept as MIME-encoded.
+ push-notification-lua: Added new "from_address", "from_display_name",
  "to_address" and "to_display_name" fields. The display names are
  decoded to UTF8.
+ Added various new fields to existing events.
  See http://doc.dovecot.net/admin_manual/list_of_events.html
+ Add lmtp_add_received_header setting. It can be used to prevent LMTP
  from adding "Received:" headers.
+ doveadm: Support SSL/STARTTLS for proxied doveadm connections based on
  doveadm_ssl setting and proxy ssl/tls settings.
+ Log filters support now "service:<name>", which matches all events for
  the given service. It can also be used as a category.
+ lib: Use libunwind to get abort backtraces with function names
  where available.
+ lmtp: When the LMTP proxy changes the username (from passdb lookup)
  add an appropriate ORCPT parameter.
- lmtp: Add lmtp_client_workarounds setting to implement workarounds for
  clients that send MAIL and RCPT commands with additional spaces before
  the path and for clients that omit <> brackets around the path.
  See example-config/conf.d/20-lmtp.conf.
- lda/lmtp: Invalid MAIL FROM addresses were rejcted too aggressively.
  Now mails from addresses with unicode characters are delivered, but
  their Return-Path header will be <> instead of the given MAIL FROM
  address.
- lmtp: The lmtp_hdr_delivery_address setting is ignored.
- imap: imap_command_finished event's "args" and "human_args" parameters
  were always empty.
- mbox: Seeking in zlib and bzip2 compressed input streams didn't work
  correctly.
- imap-hibernate: Process crashed when client got destroyed while it was
  attempted to be unhibernated, and the unhibernation fails.
- *-login: Proxying may have crashed if SSL handshake to the backend
  failed immediately. This was unlikely to happen in normal operation.
- *-login: If TLS handshake to upstream server failed during proxying,
  login process could crash due to invalid memory access.
- *-login: v2.3 regression: Using SASL authentication without initial
  response may have caused SSL connections to hang. This happened often
  at least with PHP's IMAP library.
- *-login: When login processes are flooded with authentication attempts
  it starts logging errors about "Authentication server sent unknown id".
  This is still expected. However, it also caused the login process to
  disconnect from auth server and potentially log some user's password
  in the error message.
- dict-sql: SQL prepared statements were not shared between sessions.
  This resulted in creating a lot of prepared statements, which was
  especially inefficient when using Cassandra backend with a lot of
  Cassandra nodes.
- auth: auth_request_finished event didn't have success=yes parameter
  set for successful authentications.
- auth: userdb dict - Trying to list users crashed.
- submission: Service could be configured to allow anonymous
  authentication mechanism and anonymous user access.
- LAYOUT=index: Corrupted dovecot.list.index caused folder creation to
  panic.
- doveadm: HTTP server crashes if request target starts with double "/".
- dsync: Remote dsync started hanging if the initial doveadm
  "dsync-server" command was sent in the same TCP packet as the
  following dsync handshake. v2.3.8 regression.
- lib: Several "input streams" had a bug that in some rare situations
  might cause it to access freed memory. This could lead to crashes or
  corruption.
  The only currently known effect of this is that using zlib plugin with
  external mail attachments (mail_attachment_dir) could cause fetching
  the mail to return a few bytes of garbage data at the beginning of the
  header. Note that the mail wasn't saved corrupted, but fetching it
  caused corrupted mail to be sent to the client.
- lib-storage: If a mail only has quoted content, use the quoted text
  for generating message snippet (IMAP PREVIEW) instead of returning
  empty snippet.
- lib-storage: When vsize header was rebuilt, newly calculated message
  sizes were added to dovecot.index.cache instead of being directly
  saved into vsize records in dovecot.index.
- lib: JSON generator was escaping UTF-8 characters unnecessarily.


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