X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/c3aefacc72991f4960486052775ab47cd83c5fae..9540bcf2addf37f08505454247f5687b68d340c7:/doc/doc-txt/ChangeLog?ds=sidebyside diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog index 22a38981b..f1db06451 100644 --- a/doc/doc-txt/ChangeLog +++ b/doc/doc-txt/ChangeLog @@ -1,10 +1,76 @@ -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. +Exim version 4.94 +----------------- + +JH/01 Avoid costly startup code when not strictly needed. This reduces time + for some exim process initialisations. It does mean that the logging + of TLS configuration problems is only done for the daemon startup. + +JH/02 Early-pipelining support code is now included unless disabled in Makefile. + +JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to + RFC 8301. They can still be enabled, using the dkim_verify_hashes main + option. + +JH/04 Support CHUNKING from an smtp transport using a transport_filter, when + DKIM signing is being done. Previously a transport_filter would always + disable CHUNKING, falling back to traditional DATA. + +JH/05 Regard command-line receipients as tainted. + +JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM. + +JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the + PAM library frees one of the arguments given to it, despite the + documentation. Therefore a plain malloc must be used. + +JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously + on-stack buffers were used, resulting in a taint trap when DSN information + copied from a received message was written into the buffer. + +JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix + the ordering of its ARC headers. This caused a crash. + +JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when + a new record was being constructed with information from the peer, a trap + was taken. + +JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive + installation would get error messages from DMARC verify, when it hit the + nonexistent file indicated by the default. Distros wanting DMARC enabled + should both provide the file and set the option. + Also enforce no DMARC verification for command-line sourced messages. + +JH/12 Fix an uninitialised flag in early-pipelining. Previously connections + could, depending on the platform, hang at the STARTTLS response. + +JH/13 Bug 2498: Reset a counter used for ARC verify before handling another + message on a connection. Previously if one message had ARC headers and + the following one did not, a crash could result when adding an + Authentication-Results: header. + +JH/14 Bug 2500: Rewind some of the common-coding in string handling between the + Exim main code and Exim-related utities. The introduction of taint + tracking also did many adjustments to string handling. Since then, eximon + frequently terminated with an assert failure. + +JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and + check for 452 responses. This slightly helps the inefficieny of doing + a large alias-expansion into a recipient-limited target. The max_rcpt + transport option still applies (and at the current default, will override + the new feature). The check is done for either cause of synch, and forces + a fast-retry of all 452'd recipients using a new MAIL FROM on the same + connection. The new facility is not tunable at this time. + +JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to + library live data was being used, so the results became garbage. Make + copies while it is still usable. + + Exim version 4.93 ----------------- @@ -183,6 +249,46 @@ JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in 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. + +JH/45 local_scan API: documented the current smtp_printf() call. This changed + for version 4.90 - adding a "more data" boolean to the arguments. + Bumped the ABI version number also, this having been missed previously; + release versions 4.90 to 4.92.3 inclusive were effectively broken in + respect of usage of smtp_printf() by either local_scan code or libraries + accessed via the ${dlfunc } expansion item. Both will need coding + adjustment for any calls to smtp_printf() to match the new function + signature; a FALSE value for the new argument is always safe. + +JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating + the file-offset (which the Linux syscall does, and exim expects); this + resulted in an indefinite loop. + +JH/47 ARC: fix crash in signing, triggered when a configuration error failed + to do ARC verification. The Authentication-Results: header line added + by the configuration then had no ARC item. + Exim version 4.92 -----------------