X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/4bb432cb42d990bc40665d38aedbf02b00128df7..4360153635f43c3fffee39f6767ff17b11f38c55:/doc/doc-txt/ChangeLog diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog index 583125a3b..108f03f84 100644 --- a/doc/doc-txt/ChangeLog +++ b/doc/doc-txt/ChangeLog @@ -5,6 +5,49 @@ affect Exim's operation, with an unchanged configuration file. For new options, and new features, see the NewStuff file next to this ChangeLog. +Since Exim version 4.90 +----------------- + +JH/03 Fix pgsql lookup for multiple result-tuples with a single column. + Previously only the last row was returned. + +JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously + we assumed that tags in the header were well-formed, and parsed the + element content after inspecting only the first char of the tag. + Assumptions at that stage could crash the receive process on malformed + input. + +JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL. + While running the DKIM ACL we operate on the Permanent memory pool so that + variables created with "set" persist to the DATA ACL. Also (at any time) + DNS lookups that fail create cache records using the Permanent pool. But + expansions release any allocations made on the current pool - so a dnsdb + lookup expansion done in the DKIM ACL releases the memory used for the + DNS negative-cache, and bad things result. Solution is to switch to the + Main pool for expansions. + While we're in that code, add checks on the DNS cache during store_reset, + active in the testsuite. + Problem spotted, and debugging aided, by Wolfgang Breyha. + +JH/06 Fix issue with continued-connections when the DNS shifts unreliably. + When none of the hosts presented to a transport match an already-open + connection, close it and proceed with the list. Previously we would + queue the message. Spotted by Lena with Yahoo, probably involving + round-robin DNS. + +JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL. + Previously a spurious "250 OK id=" response was appended to the proper + failure response. + +JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of + rows affected is given instead). + +JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating + SMTP connection. Previously, when one had more receipients than the + first, an abortive onward connection was made. Move to full support for + multiple onward connections in sequence, handling cutthrough connection + for all multi-message initiating connections. + Exim version 4.90 ----------------- @@ -19,6 +62,193 @@ PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly JH/02 Rework error string handling in DKIM to pass more info back to callers. This permits better logging. +JH/03 Rework the transport continued-connection mechanism: when TLS is active, + do not close it down and have the child transport start it up again on + the passed-on TCP connection. Instead, proxy the child (and any + subsequent ones) for TLS via a unix-domain socket channel. Logging is + affected: the continued delivery log lines do not have any DNSSEC, TLS + Certificate or OCSP information. TLS cipher information is still logged. + +JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of + identical IP addresses on different listening ports. Will also affect + "exiwhat" output. + +PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers; + add noisy ifdef guards to special-case this sillyness. + Patch from Bernd Kuhls. + +JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger + than 255 are no longer allowed. + +JH/06 Default openssl_options to include +no_ticket, to reduce load on peers. + Disable the session-cache too, which might reduce our load. Since we + currrectly use a new context for every connection, both as server and + client, there is no benefit for these. + GnuTLS appears to not support tickets server-side by default (we don't + call gnutls_session_ticket_enable_server()) but client side is enabled + by default on recent versions (3.1.3 +) unless the PFS priority string + is used (3.2.4 +). + +PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at + . + +JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously + the check for any unsuccessful recipients did not notice the limit, and + erroneously found still-pending ones. + +JH/08 Pipeline CHUNKING command and data together, on kernels that support + MSG_MORE. Only in-clear (not on TLS connections). + +JH/09 Avoid using a temporary file during transport using dkim. Unless a + transport-filter is involved we can buffer the headers in memory for + creating the signature, and read the spool data file once for the + signature and again for transmission. + +JH/10 Enable use of sendfile in Linux builds as default. It was disabled in + 4.77 as the kernel support then wasn't solid, having issues in 64bit + mode. Now, it's been long enough. Add support for FreeBSD also. + +JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the + case where the routing stage had gathered several addresses to send to + a host before calling the transport for the first, we previously failed + to close down TLS in the old transport process before passing the TCP + connection to the new process. The new one sent a STARTTLS command + which naturally failed, giving a failed delivery and bloating the retry + database. Investigation and fix prototype from Wolfgang Breyha. + +JH/12 Fix check on SMTP command input synchronisation. Previously there were + false-negatives in the check that the sender had not preempted a response + or prompt from Exim (running as a server), due to that code's lack of + awareness of the SMTP input buffering. + +PP/04 Add commandline_checks_require_admin option. + Exim drops privileges sanely, various checks such as -be aren't a + security problem, as long as you trust local users with access to their + own account. When invoked by services which pass untrusted data to + Exim, this might be an issue. Set this option in main configuration + AND make fixes to the calling application, such as using `--` to stop + processing options. + +JH/13 Do pipelining under TLS. Previously, although safe, no advantage was + taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server) + responses to those, into a single TLS record each way (this usually means + a single packet). As a side issue, smtp_enforce_sync now works on TLS + connections. + +PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This + affects you only if you're dancing at the edge of the param size limits. + If you are, and this message makes sense to you, then: raise the + configured limit or use OpenSSL 1.1. Nothing we can do for older + versions. + +JH/14 For the "sock" variant of the malware scanner interface, accept an empty + cmdline element to get the documented default one. Previously it was + inaccessible. + +JH/15 Fix a crash in the smtp transport caused when two hosts in succession + are unsuable for non-message-specific reasons - eg. connection timeout, + banner-time rejection. + +JH/16 Fix logging of delivery remote port, when specified by router, under + callout/hold. + +PP/06 Repair manualroute's ability to take options in any order, even if one + is the name of a transport. + Fixes bug 2140. + +HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369) + +JH/17 Change the list-building routines interface to use the expanding-string + triplet model, for better allocation and copying behaviour. + +JH/18 Prebuild the data-structure for "builtin" macros, for faster startup. + Previously it was constructed the first time a possibly-matching string + was met in the configuration file input during startup; now it is done + during compilation. + +JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy- + compatible one, to avoid the (poorly documented) possibility of a config + file in the working directory redirecting the DB files, possibly correpting + some existing file. CVE-2017-10140 assigned for BDB. + +JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not + cache-hot. Previously, although the result was properly cached, the + initial verify call returned a defer. + +JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but + the main verify for receipient in uncached-mode. + +JH/22 Retire historical build files to an "unsupported" subdir. These are + defined as "ones for which we have no current evidence of testing". + +JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field, + if present. Previously it was ignored. + +JH/24 Start using specified-initialisers in C structure init coding. This is + a C99 feature (it's 2017, so now considered safe). + +JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously + if was a fixed-sized field and bitmask ops via macros; it is now more + extensible. + +PP/07 GitHub PR 56: Apply MariaDB build fix. + Patch provided by Jaroslav Å karvada. + +PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced + during Coverity cleanups [4.87 JH/47] + Diagnosis and fix provided by Michael Fischer v. Mollard. + +JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly + the right size to place the terminating semicolon on its own folded + line, the header hash was calculated to an incorrect value thanks to + the (relaxed) space the fold became. + +HS/02 Fix Bug 2130: large writes from the transport subprocess where chunked + and confused the parent. + +JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process + which could crash as a result. This could lead to undeliverable messages. + +JH/28 Logging: "next input sent too soon" now shows where input was truncated + for log purposes. + +JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This + matters on fast-turnover and PID-randomising systems, which were getting + out-of-order delivery. + +JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for + a possibly-overlapping copy. The symptom was that "Remote host closed + connection in response to HELO" was logged instead of the actual 4xx + error for the HELO. + +JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error. + Previously only that bufferd was discarded, resulting in SYMTP command + desynchronisation. + +JH/32 DKIM: when a message has multiple signatures matching an identity given + in dkim_verify_signers, run the dkim acl once for each. Previously only + one run was done. Bug 2189. + +JH/33 Downgrade an unfound-list name (usually a typo in the config file) from + "panic the current process" to "deliberately defer". The panic log is + still written with the problem list name; the mail and reject logs now + get a temp-reject line for the message that was being handled, saying + something like "domains check lookup or other defer". The SMTP 451 + message is still "Temporary local problem". + +JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines. + A crafted sequence of BDAT commands could result in in-use memory beeing + freed. CVE-2017-16943. + +HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading + from SMTP input. Previously it was always done; now only done for DATA + and not BDAT commands. CVE-2017-16944. + +JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal + to the message (such as an overlong header line). Previously this was + not done and we did not exit BDAT mode. Followon from the previous item + though a different problem. + Exim version 4.89 ----------------- @@ -126,6 +356,8 @@ PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value. +JH/19 Fix reference counting bug in routing-generated-address tracking. + Exim version 4.88 -----------------