[Fetchmail-announce] ANNOUNCE: fetchmail-6.4.1 has been released today, 2019-09-28 (regression fixes)

[Matthias A. <mat...@gm...>]

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Greetings,

I have released fetchmail-6.4.1, it is available from sourceforge.net, see:
<https://sourceforge.net/projects/fetchmail/files/branch_6.4/>

It is a RECOMMENDED update for all users, and fixes two regressions
in fetchmail 6.4.0 since 6.4.0-rc4.

fetchmail 6.4.0 has been withdrawn.

Lesson learnt: do not change *anything* but the release name between
release candidate and release.

Older releases are herewith officially unsupported.


Where to get it - Deep link to tarball:
<https://sourceforge.net/projects/fetchmail/files/branch_6.4/fetchmail-6.4.1.tar.xz/download>
How to verify:
GnuPG detached signature:
<https://sourceforge.net/projects/fetchmail/files/branch_6.4/fetchmail-6.4.1.tar.xz.asc/download>

RIPEMD160(fetchmail-6.4.1.tar.xz)= 753d982f132cd5dcedb261631b5bee653410fef9
SHA1(fetchmail-6.4.1.tar.xz)= 1aadf078ed8fb1b6c93e9126cc0375b1f740301a
SHA256(fetchmail-6.4.1.tar.xz)= 3f33f11dd08c3e8cc3e9d18eec686b1626d4818f4d5a72791507bbc4dce6a9a0
SHA512(fetchmail-6.4.1.tar.xz)= 940b8df52f963f71537962ebe2b2cb88298fd2b54ca79932e5c974abe850f0b59cdc4919d606ee4f210e82d1e0a6f090ea87f1d3bdea18b531d4fbb36f7f9ea0


Status:

I plan to only do bug fixes to fetchmail-6.4.x so that upgrading
to newer 6.4.x releases should be acceptable under many "stable branch"
maintenance policies. More intrusive changes will happen to versions
that have higher numbers such as 6.5.y or 7.n.m (with m, n, y being numbers).


These are the release notes from NEWS:

- --------------------------------------------------------------------------------

fetchmail-6.4.1 (released 2019-09-28, 27473 LoC):

## REGRESSION FIXES:
* The bug fix Debian Bug#941129 was incomplete and caused
  + a regression in the default file locations, so that fetchmail was no longer
    able to find it configuration files in some situations.
    Reported by Cy Schubert.
  + a regression under _FORTIFY_SOURCE where PATH_MAX > minimal _POSIX_PATH_MAX.

- --------------------------------------------------------------------------------

fetchmail-6.4.0 (released 2019-09-27, 27429 LoC):

# NOTE THAT FETCHMAIL IS NO LONGER PUBLISHED THROUGH IBIBLIO.
* They have stopped accepting submissions and consider themselves an archive.

## SECURITY FIXES THAT AFFECT BEHAVIOUR AND MAY REQUIRE RECONFIGURATION
* Fetchmail no longer supports SSLv2.

* Fetchmail no longer attempts to negotiate SSLv3 by default,
  even with --sslproto ssl23. Fetchmail can now use SSLv3, or TLSv1.1 or a newer
  TLS version, with STLS/STARTTLS (it would previously force TLSv1.0 with
  STARTTLS).  If the OpenSSL version used at build and run-time supports these
  versions, --sslproto ssl3 and --sslproto ssl3+ can be used to re-enable SSLv3.
  Doing so is discouraged because the SSLv3 protocol is broken.

  Along the lines suggested - as patch - by Kurt Roeckx, Debian Bug #768843.

  While this change is supposed to be compatible with common configurations,
  users may have to and are advised to change all explicit --sslproto ssl2
  (change to newer protocols required), --sslproto ssl3, --sslproto tls1 to
  --sslproto auto, so that they can benefit from TLSv1.1 and TLSv1.2 where
  supported by the server.

  The --sslproto option now understands the values auto, ssl3+, tls1+, tls1.1,
  tls1.1+, tls1.2, tls1.2+, tls1.3, tls1.3+ (case insensitively), see CHANGES
  below for details.

* Fetchmail defaults to --sslcertck behaviour. A new option --nosslcertck to
  override this has been added, but may be removed in future fetchmail versions
  in favour of another configuration option that makes the insecurity in using
  this option clearer.

## SECURITY FIXES
* Fetchmail prevents buffer overruns in GSSAPI authentication with user names
  beyond c. 6000 characters in length. Reported by Greg Hudson.

## CHANGED REQUIREMENTS
* fetchmail 6.4.0 is written in C99 and requires a SUSv3 (Single Unix
  Specification v3, a superset of POSIX.1-2001 aka. IEEE Std 1003.1-2001 with
  XSI extension) compliant system. For now, a C89 compiler should also work
  if the system is SUSv3 compliant.

  In particular, older fetchmail versions had workaround for several functions
  standardized in the Single Unix Specification v3, these have been removed.

  The trio/ library has been removed from the distribution.

## CHANGES
* fetchmail 6.3.X is unsupported.
* fetchmail now configures OpenSSL support by default.
* fetchmail now requires OpenSSL v1.0.2 or newer.
* Fetchmail now supports --sslproto auto and --sslproto tls1+ (same as ssl23).
* --sslproto tls1.1+, tls1.2+, and tls1.3+ are now supported for
  auto-negotiation with a minimum specified TLS protocol version, and --sslproto
  tls1.1, --sslproto tls1.2 and --sslproto tls1.3 to force the specified TLS
  protocol version. Note that tls1.3 requires OpenSSL v1.1.1 or newer.
* Fetchmail now detects if the server hangs up prematurely during SSL_connect()
  and reports this condition as such, and not just as SSL connection failure.
  (OpenSSL 1.0.2 reported incompatible with pop3.live.com by Jerry Seibert).
* A foreground fetchmail can now accept a few more options while another copy is
  running in the background.
* fetchmail now handles POP3 --keep UID lists more efficiently, by using Rainer
  Weikusat's P-Tree implementation. This reduces the complexity for handling
  a large UIDL from O(n^2) to O(n log n) and becomes noticably faster with
  thousands of kept messages.
  (IMAP does not currently track UIDs and is unaffected.)
  At the same time, the UIDL emulation code for deficient servers has been
  removed. It never worked really well.  Servers that do not implement the
  optional UIDL command only work with --fetchall option set, which in itself is
  incompatible with the --keep option (it would cause message duplication).
* fetchmail, when setting up TLS connections, now uses SSL_set_tlsext_host_name()
  to set up the SNI (Server Name Indication). Some servers (for instance
  googlemail) require SNI when using newer SSL protocols.
* Fetchmail now sets the expected hostname through OpenSSL 1.0.2's new
  X509_VERIFY_PARAM_set1_host() function to enable OpenSSL's native certificate
  verification features.
* fetchmail will drop the connection when fetching with IMAP and receiving an
  unexpected untagged "* BYE" response, to work around certain faulty servers.
* The FETCHMAIL_POP3_FORCE_RETR environment variable is now documented,
  it forces fetchmail, when talking POP3, to always use the RETR command,
  even if it would otherwise use the TOP command.
* Fetchmail's configure stage will try to query pkg-config or pkgconf for libssl
  and libcrypto, in case other system use .pc files to document specific library
  dependencies. (contributed by Fabrice Fontaine, GitLab merge request !14.)
* The gethostbyname() API calls and compatibility functions have been removed.
* These translations are shipped but not installed by default because
  they have less than 500 translated messages out of 714: el fi gl pt_BR sk tr
  -> Greek, Finnish, Galician, Brazilian Portuguese, Slovak, Turkish.
* Fetchmail now refuses delivery if the MDA option contains single-quoted
  expansions.

## FIXES
* Fix a typo in the FAQ. Submitted by David Lawyer, Debian Bug#706776.
* Do not translate header tags such as "Subject:".  Reported by Gonzalo Pérez de
  Olaguer Córdoba, Debian Bug#744907.
* Convert most links from berlios.de to sourceforge.net.
* Report error to stderr, and exit, if --idle is combined with multiple
  accounts.
* Point to --idle from GENERAL OPERATION to clarify --idle and multiple
  mailboxes do not mix.  In response to Jeremy Chadwick's trouble 2014-11-19,
  fetchmail-users mailing list.
* Fix SSL-enabled build on systems that do not declare SSLv3_client_method(),
  or that #define OPENSSL_NO_SSL3 inside #include <openssl/ssl.h>
  Related to Debian Bug#775255. Fixes Debian Bug #804604.
* Version report lists -SSLv3 on SSL-enabled no-ssl3 builds.
* Fetchmail no longer adds a NUL byte to the username in GSSAPI authentication.
  This was reported to break Kerberos-based authentication with Microsoft
  Exchange 2013 by Greg Hudson.
* Set umask properly before writing the .fetchids file, to avoid failing the
  security check on the next run.  Reported by Fabian Raab,
  Fixes Debian Bug#831611.
* When forwarding by LMTP, also check antispam response code when collecting
  the responses after the CR LF . CR LF sequence at the end of the DATA phase.
  (Contributed by Evil.2000, GitLab merge request !12.)
* fetchmail will not try other protocols after a socket error. This avoids
  mismatches of how different prococols see messages as "seen" and re-fetches
  of known mail.  (Fix contributed by Lauri Nurmi, GitLab Merge Request !10.)
* fetchmail no longer reports "System error during SSL_connect(): Success."
  Fixes Debian Bug#928916, reported by Paul Kimoto.
* fetchmailconf would ignore Edit or Delete actions on the first (topmost)
  item in a list (no matter if server list, user list, ...).
* The mimedecode feature now properly detects multipart/mixed-type matches, so
  that quoted-printable-encoded multipart messages can get decoded.
  (Regression in 5.0.0 on 1999-03-27, as a side effect of a PGP-mimedecode fix
  attributed to Henrik Storner.)
* FETCHMAILHOME can now safely be a relative path, which will be qualified
  through realpath(). Previously, it had to be absolute in daemon mode.
  Reported by Alex Andreotti, Debian Bug#941129.

## UPDATED TRANSLATIONS - THANKS TO:
* CS: Petr Pisar <pet...@at...> [Czech]
* EO: Felipe Castro <fe...@gm...> [Esperanto]
* FR: Frédéric Marchal <fma...@pe...> [French]
* JP: Takeshi Hamasaki <hm...@us...> [Japanese]
* PL: Jakub Bogusz <qb...@pl...> [Polish]
* SV: Göran Uddeborg <go...@ud...> [Swedish]

# KNOWN BUGS AND WORKAROUNDS
  (This section floats upwards through the NEWS file so it stays with the
  current release information)
* Fetchmail does not handle messages without Message-ID header well
  (See sourceforge.net bug #780933)
* Fetchmail currently uses 31-bit signed integers in several places
  where unsigned and/or wider types should have been used, for instance,
  for mailbox sizes, and misreports sizes of 2 GibiB and beyond.
  Fixing this requires C89 compatibility to be relinquished.
* BSMTP is mostly untested and errors can cause corrupt output.
* Sun Workshop 6 (SPARC) is known to miscompile the configuration file lexer in
  64-bit mode.  Either compile 32-bit code or use GCC to compile 64-bit
  fetchmail.
* Fetchmail does not track pending deletes across crashes.
* The command line interface is sometimes a bit stubborn, for instance,
  fetchmail -s doesn't work with a daemon running.
* Linux systems may return duplicates of an IP address in some circumstances if
  no or no global IPv6 addresses are configured.
  (No workaround. Ubuntu Bug#582585, Novell Bug#606980.)
* Kerberos 5 may be broken, particularly on Heimdal, and provide bogus error
  messages. This will not be fixed, because the maintainer has no Kerberos 5
  server to test against. Use GSSAPI.

- --------------------------------------------------------------------------------

Happy fetches,
Matthias
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