X-Git-Url: https://git.exim.org/users/heiko/exim.git/blobdiff_plain/36eb5d3d77426d8cbf4243ea752f8d8cd1d5c682..99bfcf2b678e7bd8125a7eb44409e46549bfc111:/doc/doc-txt/ChangeLog diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog index f0dccdc62..6db97eef7 100644 --- a/doc/doc-txt/ChangeLog +++ b/doc/doc-txt/ChangeLog @@ -3,6 +3,63 @@ 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 4.95 +----------------- + +JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail- + related applications. Previously an "H" was used where available info + says that "M" should be, so change to match. + +JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used + as arguments, so an implementation trying to copy these into a local + buffer was taking a taint-enforcement trap. Fix by using dynamically + created buffers. Similar fix for radius expansion condition. + +JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is + reasonable, eg. to count headers. Fix by using dynamically created + buffers rather than a local. Do similar fixes for ACL actions "dcc", + "log_reject_target", "malware" and "spam"; the arguments are expanded + so could be handling tainted values. + +JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had + broken the (no-op) support for this sendmail command. Restore it + to doing nothing, silently, and returning good status. + +JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once" + record path was given (or the default used) without a leading directory + path, an error occurred on trying to open it. Use the transport's working + directory. + +JH/06 Bug 2594: Change the name used for certificate name checks in the smtp + transport. Previously it was the name on the DNS A-record; use instead + the head of the CNAME chain leading there (if there is one). This seems + to align better with RFC 6125. + +JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for + smtp_accept_max_per_host allocated resources which were not released + when the limit was exceeded. This eventually crashed the daemon. Fix + by adding a relase action in that path. + +JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are + expanded; previously using tainted values was rejected. Fix by using + dynamically-created buffers. + +JH/09 Relax restrictions on ACL verify condition needing access to message + headers. Previously they were only permitted in data and non-smtp ACLs; + permit also mime, dkim, prdr quit and notquit. Applies to header-syntax, + not_blind, header_sender and header_names_ascii verification. + +JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once. + Previously a macro used one argument twice; when called with the + argument as an expression having side-effects, incorrect operation + resulted. Use an inlineable function. + +JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already + held open for a verify callout. Previously this wan not accounted for + and a corrupt onward SMTP conversation resulted. + + + Exim version 4.94 ----------------- @@ -93,6 +150,7 @@ JH/20 Taint checking: disallow use of tainted data for - the autoreply transport file, log and once options - file names used by the redirect router (including filter files) - named-queue names + - paths used by single-key lookups Previously this was permitted. JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it @@ -100,13 +158,111 @@ JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it buffer was in use at the time. Change to a compile-time increase in the buffer size, when this authenticator is compiled into exim. -JH/22 Taint checking: move to a hybrid approach for checking. Previously, one - of two ways was used, depending on a build-time flag. The fast method - relied on assumptions about the OS and libc malloc, which were known to - not hold for the BSD-derived platforms, and discovered to not hold for - 32-bit Linux either. In fact the glibc documentation describes cases - where these assumptions do not hold. The new implementation tests for - the situation arising and actively switches over from fast to safe mode. +JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The + previous fast-mode was untenable in the face of glibs using mmap to + support larger malloc requests. + +PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c. + New values supported, if defined on system where compiled: + allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat, + no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding + +JH/23 Performance improvement in the initial phase of a two-pass queue run. By + running a limited number of proceses in parallel, a benefit is gained. The + amount varies with the platform hardware and load. The use of the option + queue_run_in_order means we cannot do this, as ordering becomes + indeterminate. + +JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix + had introduced a string-copy (for ensuring NUL-termination) which was not + appropriate for that case, which can include embedded NUL bytes in the + block of data. Investigation showed the copy to actually be needless, the + data being length-specified. + +JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was + done during a receiving connection, and both used TLS, global info was + used rather than per-connection info for tracking the state of data + queued for transmission. This could result in a connection hang. + +JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections. + Previously, when delivering serveral messages down a single connection + only the first would provide a SIZE. This was due to the size information + not being properly tracked. + +JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as + TAI (at 37 seconds currently), pretend to be in UTC for time-related + expansion and logging. Previously, spurious values such as a future + minute could be seen. + +JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations + it could crash from a null-deref. This could also affect the + ${addresses: } operator and ${readsock } item. + +JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime + message following a mime one, the variable was not reset. + +JH/30 When an pipelined-connect fails at the first response, assume incorrect + cached capability (perhaps the peer reneged?) and immediately retry in + non-pipelined mode. + +JH/31 Fix spurious detection of timeout while writing to transport filter. + +JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously + an attempt to copy the string was made before checking it. + +JH/33 Fix the dsearch lookup to return an untainted result. Previously the + taint of the lookup key was maintained; we now regard the presence in the + filesystem as sufficient validation. + +JH/34 Fix the readsocket expansion to not segfault when an empty "options" + argument is supplied. + +JH/35 The dsearch lookup now requires that the directory is an absolute path. + Previously this was not checked, and nonempty relative paths made an + access under Exim's current working directory. + +JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case. + Previously no event was raised. + +JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE + parameter supplied by the sender MAIL FROM command. Previously it was + ignored, and only the check_spool_space option value for the required + leeway checked. + +JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present + the size of the signing public-key. Previously it was instead giving + the size of the signature hash. + +JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now + the default. See the (new) dkim_verify_min_keysizes option. + +JH/40 Fix a memory-handling bug: when a connection carried multiple messages + and an ACL use a lookup for checking either the local_part or domain, + stale data could be accessed. Ensure that variable references are + dropped between messages. + +JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied + by the client was not checked as pointing within response data before + being used. A malicious client could thus cause an out-of-bounds read and + possibly gain authentication. Fix by adding the check. + +JH/42 Internationalisation: change the default for downconversion in the smtp + transport to be "if needed". Previously it was "as previously set" for + the message, which usually meant "if needed" for message-submission but + "no" for everything else. However, MTAs have been seen using SMTPUTF8 + even when the envelope addresses did not need it, resulting in forwarding + failures to non-supporting MTAs. A downconvert in such cases will be + a no-op on the addresses, merely dropping the use of SMTPUTF8 by the + transport. The change does mean that addresses needing conversion will + be converted when previously a delivery failure would occur. + +JH/43 Fix possible long line in DSN. Previously when a very long SMTP error + response was received it would be used unchecked in a fail-DSN, violating + standards on line-length limits. Truncate if needed. + +HS/01 Remove parameters of the link to www.open-spf.org. The linked form + doesn't work. (Additionally add a new main config option to configure the + spf_smtp_comment) Exim version 4.93 @@ -208,7 +364,7 @@ JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in 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 + for multiple message deliveries, by default. Previously the default was to not do so. JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by