that might affect a running system.
-Exim version 4.78
+Exim version 4.80
-----------------
+ * BEWARE backwards-incompatible changes in SSL libraries, thus the version
+ bump. See points below for details.
+
* The value of $tls_peerdn is now print-escaped when written to the spool file
in a -tls_peerdn line, and unescaped when read back in. We received reports
of values with embedded newlines, which caused spool file corruption.
"openssl_options" gains "no_tlsv1_1", "no_tlsv1_2" and "no_compression".
+ COMPATIBILITY WARNING: The default value of "openssl_options" is no longer
+ "+dont_insert_empty_fragments". We default to unset. That old default was
+ grandfathered in from before openssl_options became a configuration option.
+ Empty fragments are inserted by default through TLS1.0, to partially defend
+ against certain attacks; TLS1.1+ change the protocol so that this is not
+ needed. The DIEF SSL option was required for some old releases of mail
+ clients which did not gracefully handle the empty fragments, and was
+ initially set in Exim release 4.31 (see ChangeLog, item 37).
+
+ If you still have affected mail-clients, and you see SSL protocol failures
+ with this release of Exim, set:
+ openssl_options = +dont_insert_empty_fragments
+ in the main section of your Exim configuration file. You're trading off
+ security for compatibility. Exim is now defaulting to higher security and
+ rewarding more modern clients.
+
+ * Ldap lookups returning multi-valued attributes now separate the attributes
+ with only a comma, not a comma-space sequence. Also, an actual comma within
+ a returned attribute is doubled. This makes it possible to parse the
+ attribute as a comma-separated list. Note the distinction from multiple
+ attributes being returned, where each one is a name=value pair.
+
+ * accept_8bitmime now defaults on, which is not RFC compliant but is better
+ suited to today's Internet. See http://cr.yp.to/smtp/8bitmime.html for a
+ sane rationale. Those who wish to be strictly RFC compliant, or know that
+ they need to talk to servers that are not 8-bit-clean, now need to take
+ explicit configuration action to default this option off. This is not a
+ new option, you can safely force it off before upgrading, to decouple
+ configuration changes from the binary upgrade while remaining RFC compliant.
+
+ * The GnuTLS support has been mostly rewritten, to use APIs which don't cause
+ deprecation warnings in GnuTLS 2.12.x. As part of this, these three options
+ are no longer supported:
+
+ gnutls_require_kx
+ gnutls_require_mac
+ gnutls_require_protocols
+
+ Their functionality is entirely subsumed into tls_require_ciphers. In turn,
+ tls_require_ciphers is no longer an Exim list and is not parsed by Exim, but
+ is instead given to gnutls_priority_init(3), which expects a priority string;
+ this behaviour is much closer to the OpenSSL behaviour. See:
+
+ http://www.gnu.org/software/gnutls/manual/html_node/Priority-Strings.html
+
+ for fuller documentation of the strings parsed. The three gnutls_require_*
+ options are still parsed by Exim and, for this release, silently ignored.
+ A future release will add warnings, before a later still release removes
+ parsing entirely and the presence of the options will be a configuration
+ error.
+
+ Note that by default, GnuTLS will not accept RSA-MD5 signatures in chains.
+ A tls_require_ciphers value of NORMAL:%VERIFY_ALLOW_SIGN_RSA_MD5 may
+ re-enable support, but this is not supported by the Exim maintainers.
+ Our test suite no longer includes MD5-based certificates.
+
+ This rewrite means that Exim will continue to build against GnuTLS in the
+ future, brings Exim closer to other GnuTLS applications and lets us add
+ support for SNI and other features more readily. We regret that it wasn't
+ feasible to retain the three dropped options.
Exim version 4.77
problem. Prior to this release, supported values were "TLS1" and "SSL3",
so you should be able to update configuration prior to update.
+ [nb: gnutls_require_protocols removed in Exim 4.80, instead use
+ tls_require_ciphers to provide a priority string; see notes above]
+
* The match_<type>{string1}{string2} expansion conditions no longer subject
string2 to string expansion, unless Exim was built with the new
"EXPAND_LISTMATCH_RHS" option. Too many people have inadvertently created
git://git.exim.org / users / heiko / exim.git / blobdiff