X-Git-Url: https://git.exim.org/users/heiko/exim.git/blobdiff_plain/bd83c6f989cac6318ee32af3e34d3f5e69b27100..2156b9e96e10dba65081dbc688a98bf42c26d868:/doc/doc-txt/ChangeLog diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog index 2c57ce64b..c5b2ca2d8 100644 --- a/doc/doc-txt/ChangeLog +++ b/doc/doc-txt/ChangeLog @@ -1,5 +1,3 @@ -Change log file for Exim from version 4.21 ------------------------------------------- This document describes *changes* to previous versions, that might affect Exim's operation, with an unchanged configuration file. For new options, and new features, see the NewStuff file next to this ChangeLog. @@ -70,16 +68,142 @@ HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a systems which restrict the file name length to lower values. (It was "hdr.$pid".) -HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a +HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a shared (NFS) environment. -HS/02 Bug 2392: exigrep does case sensitive *option* processing (as it +HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it did for all versions <4.90). Notably -M, -m, --invert, -I may be affected. JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors on some platforms for bit 31. +JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks + to changes apparently associated with TLS1.3 handling some of the APIs + previously used were either nonfunctional or inappropriate. Strings + like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256 + and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace + the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 . + This affects log line X= elements, the $tls_{in,out}_cipher variables, + and the use of specific cipher names in the encrypted= ACL condition. + +JH/17 OpenSSL: the default openssl_options now disables ssl_v3. + +JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the + verification result was not updated unless hosts_require_ocsp applied. + +JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option + queue_list_requires_admin set to false, non-admin users were denied the + facility. + +JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in + directory-of-certs mode. Previously they were advertised despite the + documentation. + +JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default. + A single TCP connection by a client will now hold a TLS connection open + for multiple message deliveries, by default. Previoud the default was to + not do so. + +JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by + default. If built with the facility, DANE will be used. The facility + SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME". + +JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define + is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL + must be defined and you must still, unless you define DISABLE_TLS, manage + the the include-dir and library-file requirements that go with that + choice. Non-TLS builds are still supported. + +JH/24 Fix duplicated logging of peer name/address, on a transport connection- + reject under TFO. + +JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by + default. If the platform supports and has the facility enabled, it will + be requested on all coneections. + +JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now + controlled by the build-time option SUPPORT_PIPE_CONNECT. + +PP/01 Unbreak heimdal_gssapi, broken in 4.92. + +JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for + success-DSN messages. Previously the From: header was always the default + one for these; the option was ignored. + +JH/28 Fix the timeout on smtp response to apply to the whole response. + Previously it was reset for every read, so a teergrubing peer sending + single bytes within the time limit could extend the connection for a + long time. Credit to Qualsys Security Advisory Team for the discovery. + +JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing + delivery address, which leaked information of the results of local + forwarding. Change to the original envelope recipient address, per + standards. + +JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is + requested. Previously not bounce was generated and a log entry of + error ignored was made. + +JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917) + +JH/32 Introduce a general tainting mechanism for values read from the input + channel, and values derived from them. Refuse to expand any tainted + values, to catch one form of exploit. + +JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result + was unused and the unexpanded text used for the test. Found and + fixed by Ruben Jenster. + +JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open, + an attempt to use a TLS library read routine dereffed a nul pointer, + causing a segfault. + +JH/35 Bug 2409: filter out-of-spec chars from callout response before using + them in our smtp response. + +JH/36 Have the general router option retry_use_local_part default to true when + any of the restrictive preconditions are set (to anything). Previously it + was only for check_local user. The change removes one item of manual + configuration which is required for proper retries when a remote router + handles a subset of addresses for a domain. + +JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file + link count into consideration. + +HS/04 Fix handling of very log lines in -H files. If a - line + caused the extension of big_buffer, the following lines were ignored. + +JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in + accordance with RFC 2308. Previously there was no expiry, so a longlived + receive process (eg. due to ACL delays) versus a short SOA value could + surprise. + +HS/05 Handle trailing backslash gracefully. (CVE-2019-15846) + +JH/39 Promote DMARC support to mainline. + +JH/40 Bug 2452: Add a References: header to DSNs. + +JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman + parameters. The relevant library call is documented as "Deprecated: This + function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since + 3.6.0, DH parameters are negotiated following RFC7919." + +HS/06 Change the default of dnssec_request_domains to "*" + +JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we + carried on and emitted a BDAT command, even when PIPELINING was not + active. + +JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted + buffer was used for the filename, resulting in a trap when tainted + arguments (eg. $domain) were used. + +JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below; + recommended to avoid a possible server-load attack. The feature can be + re-enabled via the openssl_options main cofiguration option. + Exim version 4.92 -----------------