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Diffstat (limited to 'src/README.UPDATING')
| -rw-r--r-- | src/README.UPDATING | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/README.UPDATING b/src/README.UPDATING index 7ce35dff8..e685b8ec3 100644 --- a/src/README.UPDATING +++ b/src/README.UPDATING @@ -66,6 +66,11 @@ Exim version 4.80 security for compatibility. Exim is now defaulting to higher security and rewarding more modern clients. + If the option tls_dhparams is set and the parameters loaded from the file + have a bit-count greater than the new option tls_dh_max_bits, then the file + will now be ignored. If this affects you, raise the tls_dh_max_bits limit. + We suspect that most folks are using dated defaults and will not be affected. + * 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 @@ -111,6 +116,25 @@ Exim version 4.80 support for SNI and other features more readily. We regret that it wasn't feasible to retain the three dropped options. + * If built with TLS support, then Exim will now validate the value of + the main section tls_require_ciphers option at start-up. Before, this + would cause a STARTTLS 4xx failure, now it causes a failure to start. + Running with a broken configuration which causes failures that may only + be left in the logs has been traded off for something more visible. This + change makes an existing problem more prominent, but we do not believe + anyone would deliberately be running with an invalid tls_require_ciphers + option. + + This also means that library linkage issues caused by conflicts of some + kind might take out the main daemon, not just the delivery or receiving + process. Conceivably some folks might prefer to continue delivering + mail plaintext when their binary is broken in this way, if there is a + server that is a candidate to receive such mails that does not advertise + STARTTLS. Note that Exim is typically a setuid root binary and given + broken linkage problems that cause segfaults, we feel it is safer to + fail completely. (The check is not done as root, to ensure that problems + here are not made worse by the check). + Exim version 4.77 ----------------- |