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 4.89
+-------------------
+
+JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
+ than -2003 did; needs libidn2 in addition to libidn.
+
+JH/02 The path option on a pipe transport is now expanded before use.
+
+PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
+ Patch provided by "Björn", documentation fix added too.
+
+JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
+ missing a wire-to-host endian conversion.
+
+JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
+ close after a BDAT command line could be taken as a following command,
+ giving a synch failure. Fix by only checking for synch immediately
+ before acknowledging the chunk.
+
+PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
+ no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
+ macro. Patches provided by Josh Soref.
+
+JH/05 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
+ the dkim code may be unix-mode line endings rather than smtp wire-format
+ CRLF, so prepend a CR to any bare LF.
Exim version 4.88
-----------------
+
JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
supports it and a size is available (ie. the sending peer gave us one).
years of being deprecated). The replacements are the ACLs
acl_smtp_mime and acl_not_smtp_mime.
+JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
+ a downgraded non-dane trust-anchor for the TLS connection (CA-style)
+ or even an in-clear connection were permitted. Now, if the host lookup
+ was dnssec and dane was requested then the host is only used if the
+ TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
+ MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
+ if one fails this test.
+ This means that a poorly-configured remote DNS will make it incommunicado;
+ but it protects against a DNS-interception attack on it.
+
+JH/04 Bug 1810: make continued-use of an open smtp transport connection
+ non-noisy when a race steals the message being considered.
+
+JH/05 If main configuration option tls_certificate is unset, generate a
+ self-signed certificate for inbound TLS connections.
+
+JH/06 Bug 165: hide more cases of password exposure - this time in expansions
+ in rewrites and routers.
+
+JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
+ and logged a warning sing 4.83; now they are a configuration file error.
+
+JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
+ (lacking @domain). Apply the same qualification processing as RCPT.
+
+JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
+
+JH/10 Support ${sha256:} applied to a string (as well as the previous
+ certificate).
+
+JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
+ a cutthrough deliver is pending, as we always want to make a connection.
+ This also avoids re-routing the message when later placing the cutthrough
+ connection after a verify cache hit.
+ Do not update it with the verify result either.
+
+JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
+ when routing results in more than one destination address.
+
+JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
+ signing (which inhibits the cutthrough capability). Previously only
+ the presence of an option was tested; now an expansion evaluating as
+ empty is permissible (obviously it should depend only on data available
+ when the cutthrough connection is made).
+
+JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
+ the relevant preceding SMTP command did not note the pipelining mode.
+
+JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
+ Previously they were not counted.
+
+JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
+ as one having no matching records. Previously we deferred the message
+ that needed the lookup.
+
+JH/17 Fakereject: previously logged as a normal message arrival "<="; now
+ distinguished as "(=".
+
+JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
+ for missing MX records. Previously it only worked for missing A records.
+
+JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
+
+JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
+ after the data-go-ahead and data-ack. Patch from Jason Betts.
+
+JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
+ even for a "none" policy. Patch from Tony Meyer.
+
+JH/22 Fix continued use of a connection for further deliveries. If a port was
+ specified by a router, it must also match for the delivery to be
+ compatible.
+
+JH/23 Bug 1874: fix continued use of a connection for further deliveries.
+ When one of the recipients of a message was unsuitable for the connection
+ (has no matching addresses), we lost track of needing to mark it
+ deferred. As a result mail would be lost.
+
+JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
+
+JH/25 Decoding ACL controls is now done using a binary search; the source code
+ takes up less space and should be simpler to maintain. Merge the ACL
+ condition decode tables also, with similar effect.
+
+JH/26 Fix problem with one_time used on a redirect router which returned the
+ parent address unchanged. A retry would see the parent address marked as
+ delivered, so not attempt the (identical) child. As a result mail would
+ be lost.
+
+JH/27 Fix a possible security hole, wherein a process operating with the Exim
+ UID can gain a root shell. Credit to http://www.halfdog.net/ for
+ discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
+ itself :(
+
+JH/28 Enable {spool,log} filesystem space and inode checks as default.
+ Main config options check_{log,spool}_{inodes,space} are now
+ 100 inodes, 10MB unless set otherwise in the configuration.
+
+JH/29 Fix the connection_reject log selector to apply to the connect ACL.
+ Previously it only applied to the main-section connection policy
+ options.
+
+JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
+
+PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
+ by me. Added RFC7919 DH primes as an alternative.
+
+PP/02 Unbreak build via pkg-config with new hash support when crypto headers
+ are not in the system include path.
+
+JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
+ GnuTLS, when a session startup failed (eg because the client disconnected)
+ Exim did stdio operations after fclose. This was exposed by a recent
+ change which nulled out the file handle after the fclose.
+
+JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
+ signed directly by the cert-signing cert, rather than an intermediate
+ OCSP-signing cert. This is the model used by LetsEncrypt.
+
+JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
+
+HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
+ an incoming connection.
+
+HS/02 Bug 1802: Do not half-close the connection after sending a request
+ to rspamd.
+
+HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
+ fallback to "prime256v1".
+
+JH/34 SECURITY: Use proper copy of DATA command in error message.
+ Could leak key material. Remotely exploitable. CVE-2016-9963.
+
Exim version 4.87
-----------------
+
JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
and 3.4.4 - once the server is enabled to respond to an OCSP request
it does even when not requested, resulting in a stapling non-aware
HS/02 Add the Exim version string to the process info. This way exiwhat
gives some more detail about the running daemon.
-JH/06 Bug 1395: time-limit cacheing of DNS lookups, to the TTL value. This may
+JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
matter for fast-change records such as DNSBLs.
JH/07 Bug 1678: Always record an interface option value, if set, as part of a
JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
defaults to "*" (all hosts). The variable is now available when not built
- with TLS, default unset, mainly to enable keeping the testuite sane.
+ with TLS, default unset, mainly to enable keeping the testsuite sane.
If a server certificate is not supplied (via tls_certificate) an error is
logged, and clients will find TLS connections fail on startup. Presumably
they will retry in-clear.
in transport context, after the attempt, and per-recipient. The latter type
is per host attempted. The event data is the error message, and the errno
information encodes the lookup type (A vs. MX) used for the (first) host,
- and the trailing two digits of the smtp 4xx reponse.
+ and the trailing two digits of the smtp 4xx response.
GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
to write to mainlog (or rejectlog, paniclog) in the window between file
"pri" and "weight". Note that the previous implicit priority given by the
list order is no longer honoured.
-JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalisation
+JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
for DKIM processing.
JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
extraction. Accept either.
-
Exim version 4.86
-----------------
+
JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
expanded.
now have the list separator specified.
JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
- option values.
+ option values.
JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
under OpenSSL.
JH/24 Verification callouts now attempt to use TLS by default.
-HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
+HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
are generic router options now. The defaults didn't change.
JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
HS/02 Bug 1575: exigrep falls back to autodetection of compressed
files if ZCAT_COMMAND is not executable.
-JH/26 Bug 1539: Add timout/retry options on dnsdb lookups.
+JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
Normally benign, it bites when the pair was led to by a CNAME;
- modern usage is to not canoicalize the domain to a CNAME target
+ modern usage is to not canonicalize the domain to a CNAME target
(and we were inconsistent anyway for A-only vs AAAA+A).
JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
Exim version 4.85
-----------------
+
TL/01 When running the test suite, the README says that variables such as
no_msglog_check are global and can be placed anywhere in a specific
test's script, however it was observed that placement needed to be near
with certificate use, exposed issues where response data items split
over buffer boundaries were not parsed properly. This eventually
resulted in duplicates being sent. This issue only became common enough
- to notice due to the introduction of conection certificate information,
+ to notice due to the introduction of connection certificate information,
the item size being so much larger. Found and fixed by Wolfgang Breyha.
JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
JH/07 Add support for directories of certificates when compiled with a GnuTLS
version 3.3.6 or later.
-JH/08 Rename the TPDA expermimental facility to Event Actions. The #ifdef
+JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
is EXPERIMENTAL_EVENT, the main-configuration and transport options
both become "event_action", the variables become $event_name, $event_data
and $event_defer_errno. There is a new variable $verify_mode, usable in
JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
-JH/16 Fix string representation of time values on 64bit time_t anchitectures.
+JH/16 Fix string representation of time values on 64bit time_t architectures.
Bug 1561.
JH/17 Fix a null-indirection in certextract expansions when a nondefault
return.
JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
- This was a regression intruduced in 4.83 by another bugfix.
+ This was a regression introduced in 4.83 by another bugfix.
JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
advertises the facility. If the client requests PRDR a new
acl_data_smtp_prdr ACL is called once for each recipient, after
the body content is received and before the acl_smtp_data ACL.
- The client is controlled by bolth of: a hosts_try_prdr option
+ The client is controlled by both of: a hosts_try_prdr option
on the smtp transport, and the server advertisement.
Default client logging of deliveries and rejections involving
PRDR are flagged with the string "PRDR".
JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
Bugzilla 321, 823.
-TF/04 Added udpsend ACL modifer and hexquote expansion operator
+TF/04 Added udpsend ACL modifier and hexquote expansion operator
PP/21 Fix eximon continuous updating with timestamped log-files.
Broken in a format-string cleanup in 4.80, missed when I repaired the
Analysis and variant patch by Todd Lyons.
NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
- Bug report from Lars Müller <lars@samba.org> (via SUSE),
+ Bug report from Lars Müller <lars@samba.org> (via SUSE),
Patch from Dirk Mueller <dmueller@suse.com>
PP/13 tls_peerdn now print-escaped for spool files.
diagnostics.
Report and patch from Dmitry Banschikov.
-PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
+PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
Removed SSL_clear() after SSL_new() which led to protocol negotiation
failures. We appear to now support TLS1.1+ with Exim.
has clearer semantics. The /leaky, /strict, and /readonly update modes
are mutually exclusive. The update mode is no longer included in the
database key; it just determines when the database is updated. (This
- means that when you upgrde Exim will forget old rate measurements.)
+ means that when you upgrade Exim will forget old rate measurements.)
Exim now checks that the per_* options are used with an update mode that
makes sense for the current ACL. For example, when Exim is processing a
Exim version 4.75
-----------------
-NM/01 Workround for PCRE version dependency in version reporting
+NM/01 Workaround for PCRE version dependency in version reporting
Bugzilla 1073
TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
variable declaration deep within a block. Bug and patch from
Dennis Davis.
-PP/15 lookups-Makefile IRIX compatibilty coercion.
+PP/15 lookups-Makefile IRIX compatibility coercion.
PP/16 Make DISABLE_DKIM build knob functional.
colons if the lookup type is iplsearch. This is not incompatible, because
previously such lookups could never work.
- The situation is now rather anomolous, since one *can* have colons in
+ The situation is now rather anomalous, since one *can* have colons in
ordinary lsearch keys. However, making the change in all cases is
incompatible and would probably break a number of configurations.
PH/20 Added hosts_avoid_pipelining to the smtp transport.
PH/21 Long custom messages for fakedefer and fakereject are now split up
- into multiline reponses in the same way that messages for "deny" and
+ into multiline responses in the same way that messages for "deny" and
other ACL rejections are.
PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
runs only) independently of the message's sender address. This meant
that, if the 4xx error was in fact related to the sender, a different
message to the same recipient with a different sender could confuse
- things. In particualar, this can happen when sending to a greylisting
+ things. In particular, this can happen when sending to a greylisting
server, but other circumstances could also provoke similar problems.
I have changed the default so that the retry time for these errors is now
based a combination of the sender and recipient addresses. This change
JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
(added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
- whitesspace changes from 4.64-PH/27
+ whitespace changes from 4.64-PH/27
JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
match 4.64-PH/13
(a) Failures to set uid/gid, the current directory, or a process leader
in a subprocess such as that created by queryprogram now generate
- suitable debugging ouput when -d is set.
+ suitable debugging output when -d is set.
(b) The queryprogram router detects when it is not running as root,
outputs suitable debugging information if -d is set, and then runs
and most important:
o fixes a bug in processing the envelope test (when testing
- multiple envelope elements, the last element determinted the
+ multiple envelope elements, the last element determined the
result)
PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
Auto-submitted: auto-generated
in the messages that it generates (bounce messages and others, such as
- warnings). In the case of bounce messages for non-SMTP mesages, there was
+ warnings). In the case of bounce messages for non-SMTP messages, there was
also a typo: it was using "Auto_submitted" (underscore instead of
hyphen). Since every message generated by Exim is necessarily in response
to another message, thes have all been changed to:
PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
with the definition in sysexits.h (which is #included earlier).
Fortunately, Exim does not actually use EX_OK. The code used to try to
- preserve the sysexits.h value, by assumimg that macro definitions were
+ preserve the sysexits.h value, by assuming that macro definitions were
scanned for macro replacements. I have been disabused of this notion,
so now the code just undefines EX_OK before #including unistd.h.
SC/01 Eximstats: added -xls and the ability to specify output files
(patch written by Frank Heydlauf).
-SC/02 Eximstats: use FileHandles for outputing results.
+SC/02 Eximstats: use FileHandles for outputting results.
SC/03 Eximstats: allow any combination of xls, txt, and html output.
58. When a "warn" ACL statement has a log_message modifier, the message is
remembered, and not repeated. This is to avoid a lot of repetition when a
message has many recipients that cause the same warning to be written.
- Howewer, Exim was preserving the list of already written lines for an
+ However, Exim was preserving the list of already written lines for an
entire SMTP session, which doesn't seem right. The memory is now reset if a
new message is started.
the list was checked. (An example that provoked this was putting <; in the
middle of a list instead of at the start.) If this happened during a DATA
ACL check, a -D file could be left lying around. This kind of configuration
- error no longer causes Exim to die; instead it causes a defer errror. The
+ error no longer causes Exim to die; instead it causes a defer error. The
incident is still logged to the main and panic logs.
74. Buglet left over from Exim 3 conversion. The message "too many messages
systems (e.g. Solaris), it also passes back the IP address string as the
"host name". However, on others (e.g. Linux), it passes back an empty
string. Exim wasn't checking for this, and was changing the host name to an
- empty string, assuming it had been canonicized.
+ empty string, assuming it had been canonicalized.
5. Although rare, it is permitted to have more than one PTR record for a given
IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
13. The install script calls Exim with "-C /dev/null" in order to find the
version number. If ALT_CONFIG_PREFIX was set, this caused an error message
- to be output. Howeve, since Exim outputs its version number before the
+ to be output. However, since Exim outputs its version number before the
error, it didn't break the script. It just looked ugly. I fixed this by
always allowing "-C /dev/null" if the caller is root.
34. Testing for a connection timeout using "timeout_connect" in the retry rules
did not work. The code looks as if it has *never* worked, though it appears
- to have been documented since at least releast 1.62. I have made it work.
+ to have been documented since at least release 1.62. I have made it work.
35. The "timeout_DNS" error in retry rules, also documented since at least
1.62, also never worked. As it isn't clear exactly what this means, and
16. Check for letters, digits, hyphens, and dots in the names of dnslist
domains, and warn by logging if others are found.
-17. At least on BSD, alignment is not guarenteed for the array of ifreq's
+17. At least on BSD, alignment is not guaranteed for the array of ifreq's
returned from GIFCONF when Exim is trying to find the list of interfaces on
a host. The code in os.c has been modified to copy each ifreq to an aligned
structure in all cases.
24. Ignore Sendmail's -Ooption=value command line item.
25. When execve() failed while trying to run a command in a pipe transport,
- Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
+ Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
could be confused with a return value of 69 from the command itself. This
has been changed to 127, the value the shell returns if it is asked to run
a non-existent command. The wording for the related log line suggests a
47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
when I implemented it. It didn't allow for the fact that some option values
- may legitimatetly be negative (e.g. size_addition), and it didn't even do
+ may legitimately be negative (e.g. size_addition), and it didn't even do
the right test for positive values.
48. Domain names in DNS records are case-independent. Exim always looks them up
git://git.exim.org / users / jgh / exim.git / blobdiff