1. The ACL conditions regex and mime_regex now capture substrings
into numeric variables $regex1 to 9, like the "match" expansion condition.
2. New $callout_address variable records the address used for a spam=,
malware= or verify= callout.
3. Transports now take a "max_parallel" option, to limit concurrency.
4. Expansion operators ${ipv6norm:<string>} and ${ipv6denorm:<string>}.
The latter expands to a 8-element colon-sep set of hex digits including
leading zeroes. A trailing ipv4-style dotted-decimal set is converted
to hex. Pure ipv4 addresses are converted to IPv4-mapped IPv6.
The former operator strips leading zeroes and collapses the longest
set of 0-groups to a double-colon.
5. New "-bP config" support, to dump the effective configuration.
6. New $dkim_key_length variable.
7. New base64d and base64 expansion items (the existing str2b64 being a
synonym of the latter). Add support in base64 for certificates.
8. New main configuration option "bounce_return_linesize_limit" to
avoid oversize bodies in bounces. The dafault value matches RFC
limits.
9. New $initial_cwd expansion variable.
Exim version 4.86.2
-------------------
Portability relase of 4.86.1
Exim version 4.86.1
-------------------
HS/04 Add support for keep_environment and add_environment options.
This fixes CVE-2016-1531.
All installations having Exim set-uid root and using 'perl_startup' are
vulnerable to a local privilege escalation. Any user who can start an
instance of Exim (and this is normally *any* user) can gain root
privileges. If you do not use 'perl_startup' you *should* be safe.
New options
-----------
We had to introduce two new configuration options:
keep_environment =
add_environment =
Both options are empty per default. That is, Exim cleans the complete
environment on startup. This affects Exim itself and any subprocesses,
as transports, that may call other programs via some alias mechanisms,
as routers (queryprogram), lookups, and so on. This may affect used
libraries (e.g. LDAP).
** THIS MAY BREAK your existing installation **
If both options are not used in the configuration, Exim issues a warning
on startup. This warning disappears if at least one of these options is
used (even if set to an empty value).
keep_environment should contain a list of trusted environment variables.
(Do you trust PATH?). This may be a list of names and REs.
keep_environment = ^LDAP_ : FOO_PATH
To add (or override) variables, you can use add_environment:
add_environment = <; PATH=/sbin:/usr/sbin
New behaviour
-------------
Now Exim changes it's working directory to / right after startup,
even before reading it's configuration. (Later Exim changes it's working
directory to $spool_directory, as usual.)
Exim only accepts an absolute configuration file path now, when using
the -C option.
Exim version 4.86
-----------------
JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
expanded.
JH/02 The smtp transport option "multi_domain" is now expanded.
JH/03 The smtp transport now requests PRDR by default, if the server offers
it.
JH/04 Certificate name checking on server certificates, when exim is a client,
is now done by default. The transport option tls_verify_cert_hostnames
can be used to disable this per-host. The build option
EXPERIMENTAL_CERTNAMES is withdrawn.
JH/05 The value of the tls_verify_certificates smtp transport and main options
default to the word "system" to access the system default CA bundle.
For GnuTLS, only version 3.0.20 or later.
JH/06 Verification of the server certificate for a TLS connection is now tried
(but not required) by default. The verification status is now logged by
default, for both outbound TLS and client-certificate supplying inbound
TLS connections
JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
sites use this now.
JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
Status Notification (bounce) messages are now MIME format per RFC 3464.
Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
under the control of the dsn_advertise_hosts option, and routers may
have a dsn_lasthop option.
JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
default, modifiable by a malware= option. The list separator for
the options can now be changed in the usual way. Bug 68.
JH/10 The smtp_receive_timeout main option is now expanded before use.
JH/11 The incoming_interface log option now also enables logging of the
local interface on delivery outgoing connections.
JH/12 The cutthrough-routing facility now supports multi-recipient mails,
if the interface and destination host and port all match.
JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
/defer_ok option.
JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
Patch from Andrew Lewis.
JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
now supports optional time-restrictions, weighting, and priority
modifiers per server. Patch originally by <rommer@active.by>.
JH/16 The spamd_address main option now supports a mixed list of local
and remote servers. Remote servers can be IPv6 addresses, and
specify a port-range.
JH/17 Bug 68: The spamd_address main option now supports an optional
timeout value per server.
JH/18 Bug 1581: Router and transport options headers_add/remove can
now have the list separator specified.
JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
option values.
JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
under OpenSSL.
JH/21 Support for the A6 type of dns record is withdrawn.
JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
rather than the verbs used.
JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
from 255 to 1024 chars.
JH/24 Verification callouts now attempt to use TLS by default.
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.
Original patch from Alexander Shikoff, worked over by JH.
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/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
(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.
JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
when evaluating $sender_host_dnssec.
JH/31 Check the HELO verification lookup for DNSSEC, adding new
$sender_helo_dnssec variable.
JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
documented as working, but never had. Support all but $spam_report.
JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
added for tls authenticator.
-----------------
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
the beginning for it to behave that way. Changed the runtest perl
script to read through the entire script once to detect and set these
variables, reset to the beginning of the script, and then run through
the script parsing/test process like normal.
TL/02 The BSD's have an arc4random API. One of the functions to induce
adding randomness was arc4random_stir(), but it has been removed in
OpenBSD 5.5. Detect this OpenBSD version and skip calling this
function when detected.
JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
cause callback expansion.
TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
syntax errors in an expansion can be treated as a string instead of
logging or causing an error, due to the internal use of bool_lax
instead of bool when processing it.
JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
server certificates when making smtp deliveries.
JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
Merged patch from Sebastian Wiedenroth.
JH/05 Fix results-pipe from transport process. Several recipients, combined
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,
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
size buffer was used, resulting in syntax errors when an expansion
exceeded it.
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
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
routers, transports and related events. The tls:cert event is now also
raised for inbound connections, if the main configuration event_action
option is defined.
TL/06 In test suite, disable OCSP for old versions of openssl which contained
early OCSP support, but no stapling (appears to be less than 1.0.0).
JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
server certificate names available under the smtp transport option
"tls_verify_cert_hostname" now do not permit multi-component wildcard
matches.
JH/10 Time-related extraction expansions from certificates now use the main
option "timezone" setting for output formatting, and are consistent
between OpenSSL and GnuTLS compilations. Bug 1541.
JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
encoded parameter in the incoming message. Bug 1558.
JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
include certificate info, eximon was claiming there were spoolfile
syntax errors.
JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
JH/14 Log delivery-related information more consistently, using the sequence
"H=<name> [<ip>]" wherever possible.
TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
are problematic for Debian distribution, omit them from the release
tarball.
JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
JH/16 Fix string representation of time values on 64bit time_t anchitectures.
Bug 1561.
JH/17 Fix a null-indirection in certextract expansions when a nondefault
output list separator was used.
TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
checkers that were complaining about end of non-void function with no
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.
JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
EXPERIMENTAL_DNS is enabled.
1. If built with the EXPERIMENTAL_PROXY feature enabled, Exim can be
configured to expect an initial header from a proxy that will make the
actual external source IP:host be used in exim instead of the IP of the
proxy that is connecting to it.
2. New verify option header_names_ascii, which will check to make sure
there are no non-ASCII characters in header names. Exim itself handles
those non-ASCII characters, but downstream apps may not, so Exim can
detect and reject if those characters are present.
3. New expansion operator ${utf8clean:string} to replace malformed UTF8
codepoints with valid ones.
4. New malware type "sock". Talks over a Unix or TCP socket, sending one
command line and matching a regex against the return data for trigger
and a second regex to extract malware_name. The mail spoofile name can
be included in the command line.
5. The smtp transport now supports options "tls_verify_hosts" and
"tls_try_verify_hosts". If either is set the certificate verification
is split from the encryption operation. The default remains that a failed
verification cancels the encryption.
6. New SERVERS override of default ldap server list. In the ACLs, an ldap
lookup can now set a list of servers to use that is different from the
default list.
7. New command-line option -C for exiqgrep to specify alternate exim.conf
file when searching the queue.
8. OCSP now supports GnuTLS also, if you have version 3.1.3 or later of that.
9. Support for DNSSEC on outbound connections.
10. New variables "tls_(in,out)_(our,peer)cert" and expansion item
"certextract" to extract fields from them. Hash operators md5 and sha1
work over them for generating fingerprints, and a new sha256 operator
for them added.
11. PRDR is now supported dy default.
12. OCSP stapling is now supported by default.
13. If built with the EXPERIMENTAL_DSN feature enabled, Exim will output
Delivery Status Notification messages in MIME format, and negociate
DSN features per RFC 3461.
Do it for all packages that
* mention perl, or
* have a directory name starting with p5-*, or
* depend on a package starting with p5-
like last time, for 5.18, where this didn't lead to complaints.
Let me know if you have any this time.
This is a SECURITY release, addressing a CRITICAL remote code execution
flaw in Exim version 4.82 (only) when built with DMARC support (an
experimental feature, not on by default). This release is identical to
4.82 except for the small change needed to plug the security hole. The
next release of Exim will, eventually, be 4.83, which will include the
many improvements we've made since 4.82, but which will require the
normal release candidate baking process before release.
You are not vulnerable unless you built Exim with EXPERIMENTAL_DMARC.
This issue is known by the CVE ID of CVE-2014-2957, was reported
directly to the Exim development team by a company which uses Exim for
its mail server. An Exim developer constructed a small patch which
altered the way the contents of the From header is parsed by converting
it to use safer and better internal functions. It was applied and
tested on a production server for correctness. We were notified of the
vulnerability Friday night, created a patch on Saturday, applied and
tested it on Sunday, notified OS packagers on Monday/Tuesday, and are
releasing on the next available work day, which is Wednesday.
This is why we have made the smallest feasible changes to prevent
exploit: we want this chagne to be as safe as possible to expedite into
production (if the packages were built with DMARC).
1. New command-line option -bI:sieve will list all supported sieve extensions
of this Exim build on standard output, one per line.
ManageSieve (RFC 5804) providers managing scripts for use by Exim should
query this to establish the correct list to include in the protocol's
SIEVE capability line.
2. If the -n option is combined with the -bP option, then the name of an
emitted option is not output, only the value (if visible to you).
For instance, "exim -n -bP pid_file_path" should just emit a pathname
followed by a newline, and no other text.
3. When built with SUPPORT_TLS and USE_GNUTLS, the SMTP transport driver now
has a "tls_dh_min_bits" option, to set the minimum acceptable number of
bits in the Diffie-Hellman prime offered by a server (in DH ciphersuites)
acceptable for security. (Option accepted but ignored if using OpenSSL).
Defaults to 1024, the old value. May be lowered only to 512, or raised as
far as you like. Raising this may hinder TLS interoperability with other
sites and is not currently recommended. Lowering this will permit you to
establish a TLS session which is not as secure as you might like.
Unless you really know what you are doing, leave it alone.
4. If not built with DISABLE_DNSSEC, Exim now has the main option
dns_dnssec_ok; if set to 1 then Exim will initialise the resolver library
to send the DO flag to your recursive resolver. If you have a recursive
resolver, which can set the Authenticated Data (AD) flag in results, Exim
can now detect this. Exim does not perform validation itself, instead
relying upon a trusted path to the resolver.
Current status: work-in-progress; $sender_host_dnssec variable added.
5. DSCP support for outbound connections: on a transport using the smtp driver,
set "dscp = ef", for instance, to cause the connections to have the relevant
DSCP (IPv4 TOS or IPv6 TCLASS) value in the header.
Similarly for inbound connections, there is a new control modifier, dscp,
so "warn control = dscp/ef" in the connect ACL, or after authentication.
Supported values depend upon system libraries. "exim -bI:dscp" to list the
ones Exim knows of. You can also set a raw number 0..0x3F.
6. The -G command-line flag is no longer ignored; it is now equivalent to an
ACL setting "control = suppress_local_fixups". The -L command-line flag
is now accepted and forces use of syslog, with the provided tag as the
process name. A few other flags used by Sendmail are now accepted and
ignored.
7. New cutthrough routing feature. Requested by a "control = cutthrough_delivery"
ACL modifier; works for single-recipient mails which are recieved on and
deliverable via SMTP. Using the connection made for a recipient verify,
if requested before the verify, or a new one made for the purpose while
the inbound connection is still active. The bulk of the mail item is copied
direct from the inbound socket to the outbound (as well as the spool file).
When the source notifies the end of data, the data acceptance by the destination
is negociated before the acceptance is sent to the source. If the destination
does not accept the mail item, for example due to content-scanning, the item
is not accepted from the source and therefore there is no need to generate
a bounce mail. This is of benefit when providing a secondary-MX service.
The downside is that delays are under the control of the ultimate destination
system not your own.
The Recieved-by: header on items delivered by cutthrough is generated
early in reception rather than at the end; this will affect any timestamp
included. The log line showing delivery is recorded before that showing
reception; it uses a new ">>" tag instead of "=>".
To support the feature, verify-callout connections can now use ESMTP and TLS.
The usual smtp transport options are honoured, plus a (new, default everything)
hosts_verify_avoid_tls.
New variable families named tls_in_cipher, tls_out_cipher etc. are introduced
for specific access to the information for each connection. The old names
are present for now but deprecated.
Not yet supported: IGNOREQUOTA, SIZE, PIPELINING.
8. New expansion operators ${listnamed:name} to get the content of a named list
and ${listcount:string} to count the items in a list.
9. New global option "gnutls_allow_auto_pkcs11", defaults false. The GnuTLS
rewrite in 4.80 combines with GnuTLS 2.12.0 or later, to autoload PKCS11
modules. For some situations this is desirable, but we expect admin in
those situations to know they want the feature. More commonly, it means
that GUI user modules get loaded and are broken by the setuid Exim being
unable to access files specified in environment variables and passed
through, thus breakage. So we explicitly inhibit the PKCS11 initialisation
unless this new option is set.
Some older OS's with earlier versions of GnuTLS might not have pkcs11 ability,
so have also added a build option which can be used to build Exim with GnuTLS
but without trying to use any kind of PKCS11 support. Uncomment this in the
Local/Makefile:
AVOID_GNUTLS_PKCS11=yes
10. The "acl = name" condition on an ACL now supports optional arguments.
New expansion item "${acl {name}{arg}...}" and expansion condition
"acl {{name}{arg}...}" are added. In all cases up to nine arguments
can be used, appearing in $acl_arg1 to $acl_arg9 for the called ACL.
Variable $acl_narg contains the number of arguments. If the ACL sets
a "message =" value this becomes the result of the expansion item,
or the value of $value for the expansion condition. If the ACL returns
accept the expansion condition is true; if reject, false. A defer
return results in a forced fail.
11. Routers and transports can now have multiple headers_add and headers_remove
option lines. The concatenated list is used.
12. New ACL modifier "remove_header" can remove headers before message gets
handled by routers/transports.
13. New dnsdb lookup pseudo-type "a+". A sequence of "a6" (if configured),
"aaaa" and "a" lookups is done and the full set of results returned.
14. New expansion variable $headers_added with content from ACL add_header
modifier (but not yet added to messsage).
15. New 8bitmime status logging option for received messages. Log field "M8S".
16. New authenticated_sender logging option, adding to log field "A".
17. New expansion variables $router_name and $transport_name. Useful
particularly for debug_print as -bt commandline option does not
require privilege whereas -d does.
18. If built with EXPERIMENTAL_PRDR, per-recipient data responses per a
proposed extension to SMTP from Eric Hall.
19. The pipe transport has gained the force_command option, to allow
decorating commands from user .forward pipe aliases with prefix
wrappers, for instance.
20. Callout connections can now AUTH; the same controls as normal delivery
connections apply.
21. Support for DMARC, using opendmarc libs, can be enabled. It adds new
options: dmarc_forensic_sender, dmarc_history_file, and dmarc_tld_file.
It adds new expansion variables $dmarc_ar_header, $dmarc_status,
$dmarc_status_text, and $dmarc_used_domain. It adds a new acl modifier
dmarc_status. It adds new control flags dmarc_disable_verify and
dmarc_enable_forensic.
22. Add expansion variable $authenticated_fail_id, which is the username
provided to the authentication method which failed. It is available
for use in subsequent ACL processing (typically quit or notquit ACLs).
23. New ACL modifer "udpsend" can construct a UDP packet to send to a given
UDP host and port.
24. New ${hexquote:..string..} expansion operator converts non-printable
characters in the string to \xNN form.
25. Experimental TPDA (Transport Post Delivery Action) function added.
Patch provided by Axel Rau.
26. Experimental Redis lookup added. Patch provided by Warren Baker.
are replaced with .include "../../devel/readline/buildlink3.mk", and
USE_GNU_READLINE are removed,
* .include "../../devel/readline/buildlink3.mk" without USE_GNU_READLINE
are replaced with .include "../../mk/readline.buildlink3.mk".
a) refer 'perl' in their Makefile, or
b) have a directory name of p5-*, or
c) have any dependency on any p5-* package
Like last time, where this caused no complaints.
Exim version 4.80.1
-------------------
PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
CVE-2012-5671
This, or similar/improved, will also be change PP/11 of 4.81.
See: https://secunia.com/advisories/51098/
1. New authenticator driver, "gsasl". Server-only (at present).
This is a SASL interface, licensed under GPL, which can be found at
http://www.gnu.org/software/gsasl/.
This system does not provide sources of data for authentication, so
careful use needs to be made of the conditions in Exim.
2. New authenticator driver, "heimdal_gssapi". Server-only.
A replacement for using cyrus_sasl with Heimdal, now that $KRB5_KTNAME
is no longer honoured for setuid programs by Heimdal. Use the
"server_keytab" option to point to the keytab.
3. The "pkg-config" system can now be used when building Exim to reference
cflags and library information for lookups and authenticators, rather
than having to update "CFLAGS", "AUTH_LIBS", "LOOKUP_INCLUDE" and
"LOOKUP_LIBS" directly. Similarly for handling the TLS library support
without adjusting "TLS_INCLUDE" and "TLS_LIBS".
In addition, setting PCRE_CONFIG=yes will query the pcre-config tool to
find the headers and libraries for PCRE.
4. New expansion variable $tls_bits.
5. New lookup type, "dbmjz". Key is an Exim list, the elements of which will
be joined together with ASCII NUL characters to construct the key to pass
into the DBM library. Can be used with gsasl to access sasldb2 files as
used by Cyrus SASL.
6. OpenSSL now supports TLS1.1 and TLS1.2 with OpenSSL 1.0.1.
Avoid release 1.0.1a if you can. Note that the default value of
"openssl_options" is no longer "+dont_insert_empty_fragments", as that
increased susceptibility to attack. This may still have interoperability
implications for very old clients (see version 4.31 change 37) but
administrators can choose to make the trade-off themselves and restore
compatibility at the cost of session security.
7. Use of the new expansion variable $tls_sni in the main configuration option
tls_certificate will cause Exim to re-expand the option, if the client
sends the TLS Server Name Indication extension, to permit choosing a
different certificate; tls_privatekey will also be re-expanded. You must
still set these options to expand to valid files when $tls_sni is not set.
The SMTP Transport has gained the option tls_sni, which will set a hostname
for outbound TLS sessions, and set $tls_sni too.
A new log_selector, +tls_sni, has been added, to log received SNI values
for Exim as a server.
8. The existing "accept_8bitmime" option now defaults to true. This means
that Exim is deliberately not strictly RFC compliant. We're following
Dan Bernstein's advice in http://cr.yp.to/smtp/8bitmime.html by default.
Those who disagree, or know that they are talking to mail servers that,
even today, are not 8-bit clean, need to turn off this option.
9. Exim can now be started with -bw (with an optional timeout, given as
-bw<timespec>). With this, stdin at startup is a socket that is
already listening for connections. This has a more modern name of
"socket activation", but forcing the activated socket to fd 0. We're
interested in adding more support for modern variants.
10. ${eval } now uses 64-bit values on supporting platforms. A new "G" suffix
for numbers indicates multiplication by 1024^3.
11. The GnuTLS support has been revamped; the three options gnutls_require_kx,
gnutls_require_mac & gnutls_require_protocols are no longer supported.
tls_require_ciphers is now parsed by gnutls_priority_init(3) as a priority
string, documentation for which is at:
http://www.gnu.org/software/gnutls/manual/html_node/Priority-Strings.html
SNI support has been added to Exim's GnuTLS integration too.
For sufficiently recent GnuTLS libraries, ${randint:..} will now use
gnutls_rnd(), asking for GNUTLS_RND_NONCE level randomness.
12. With OpenSSL, if built with EXPERIMENTAL_OCSP, a new option tls_ocsp_file
is now available. If the contents of the file are valid, then Exim will
send that back in response to a TLS status request; this is OCSP Stapling.
Exim will not maintain the contents of the file in any way: administrators
are responsible for ensuring that it is up-to-date.
13. ${lookup dnsdb{ }} supports now SPF record types. They are handled
identically to TXT record lookups.
14. New expansion variable $tod_epoch_l for higher-precision time.
15. New global option tls_dh_max_bits, defaulting to current value of NSS
hard-coded limit of DH ephemeral bits, to fix interop problems caused by
GnuTLS 2.12 library recommending a bit count higher than NSS supports.
16. tls_dhparam now used by both OpenSSL and GnuTLS, can be path or identifier.
Option can now be a path or an identifier for a standard prime.
If unset, we use the DH prime from section 2.2 of RFC 5114, "ike23".
Set to "historic" to get the old GnuTLS behaviour of auto-generated DH
primes.
17. SSLv2 now disabled by default in OpenSSL. (Never supported by GnuTLS).
Use "openssl_options -no_sslv2" to re-enable support, if your OpenSSL
install was not built with OPENSSL_NO_SSL2 ("no-ssl2").
* Solaris build fix for Oracle's LDAP libraries.
* HP/UX build fix: avoid arithmetic on a void pointer.
* DKIM Verification: Fix relaxed canon for empty headers w/o whitespace trailer
* Fix a couple more cases where we did not log the error message when unlink()
failed.
* Make the exiwhat support code safe for signals. Previously Exim might lock up
or crash if it happened to be inside a call to libc when it got a SIGUSR1
from exiwhat.
* Improved ratelimit ACL condition.
* Removed a few PCRE remnants.
* Automatically extract Exim's version number from tags in the git repository
when doing development or release builds.
* Raise smtp_cmd_buffer_size to 16kB.
* Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
* Use .dylib instead of .so for dynamic library loading on MacOS.
* Variable $av_failed, true if the AV scanner deferred.
* Stop make process more reliably on build failure.
* Make maildir_use_size_file an _expandable_ boolean.
* Handle ${run} returning more data than OS pipe buffer size.
* Handle IPv6 addresses with SPF.
* GnuTLS: support TLS 1.2 & 1.1.
* match_* no longer expand right-hand-side by default.
* fix uninitialised greeting string from PP/03 (smtps client support).
* shell and compiler warnings fixes for RC1-RC4 changes.
* The new ldap_require_cert option would segfault if used. Fixed.
* Harmonised TLS library version reporting; only show if debugging.
Layout now matches that introduced for other libraries in 4.74 PP/03.
* New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
* New "dns_use_edns0" global option.
* Don't segfault on misconfiguration of ref:name exim-user as uid.
* Extra paranoia around buffer usage at the STARTTLS transition.
nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
* Updated PolarSSL code to 0.14.2.
* Catch divide-by-zero in ${eval:...}.
* Condition negation of bool{}/bool_lax{} did not negate. Fixed.
* CVE-2011-1764 - DKIM log line was subject to a format-string attack --
SECURITY: remote arbitrary code execution.
* SECURITY - DKIM signature header parsing was double-expanded, second
time unintentionally subject to list matching rules, letting the header
cause arbitrary Exim lookups (of items which can occur in lists, *not*
arbitrary string expansion). This allowed for information disclosure.
* Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
INT_MIN/-1 -- value coerced to INT_MAX.
1. In addition to the existing LDAP and LDAP/SSL ("ldaps") support, there
is now LDAP/TLS support, given sufficiently modern OpenLDAP client
libraries. The following global options have been added in support of
this: ldap_ca_cert_dir, ldap_ca_cert_file, ldap_cert_file, ldap_cert_key,
ldap_cipher_suite, ldap_require_cert, ldap_start_tls.
2. The pipe transport now takes a boolean option, "freeze_signal", default
false. When true, if the external delivery command exits on a signal then
Exim will freeze the message in the queue, instead of generating a bounce.
3. Log filenames may now use %M as an escape, instead of %D (still available).
The %M pattern expands to yyyymm, providing month-level resolution.
4. The $message_linecount variable is now updated for the maildir_tag option,
in the same way as $message_size, to reflect the real number of lines,
including any header additions or removals from transport.
5. When contacting a pool of SpamAssassin servers configured in spamd_address,
Exim now selects entries randomly, to better scale in a cluster setup.
* Failure to get a lock on a hints database can have serious
consequences so log it to the panic log.
* Log LMTP confirmation messages in the same way as SMTP,
controlled using the smtp_confirmation log selector.
* Include the error message when we fail to unlink a spool file.
* Bugzilla 139: Support dynamically loaded lookups as modules.
* Bugzilla 139: Documentation and portability issues.
Avoid GNU Makefile-isms, let Exim continue to build on BSD.
Handle per-OS dynamic-module compilation flags.
* Let /dev/null have normal permissions.
The 4.73 fixes were a little too stringent and complained about the
permissions on /dev/null. Exempt it from some checks.
* Report version information for many libraries, including
Exim version information for dynamically loaded libraries. Created
version.h, now support a version extension string for distributors
who patch heavily. Dynamic module ABI change.
* CVE-2011-0017 - check return value of setuid/setgid. This is a
privilege escalation vulnerability whereby the Exim run-time user
can cause root to append content of the attacker's choosing to
arbitrary files.
* Bugzilla 1041: merged DCC maintainer's fixes for return code.
* Bugzilla 1071: fix delivery logging with untrusted macros.
If dropping privileges for untrusted macros, we disabled normal logging
on the basis that it would fail; for the Exim run-time user, this is not
the case, and it resulted in successful deliveries going unlogged.
* Date: & Message-Id: revert to normally being appended to a message,
only prepend for the Resent-* case. Fixes regression introduced in
Exim 4.70 by NM/22 for Bugzilla 607.
* Include check_rfc2047_length in configure.default because we're seeing
increasing numbers of administrators be bitten by this.
* Added DISABLE_DKIM and comment to src/EDITME
* Bugzilla 994: added openssl_options main configuration option.
* Bugzilla 995: provide better SSL diagnostics on failed reads.
* Bugzilla 834: provide a permit_coredump option for pipe transports.
* Adjust NTLM authentication to handle SASL Initial Response.
* If TLS negotiated an anonymous cipher, we could end up with SSL but
without a peer certificate, leading to a segfault because of an
assumption that peers always have certificates. Be a little more paranoid.
* Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
NB: ClamAV planning to remove STREAM in "middle of 2010".
CL also introduces -bmalware, various -d+acl logging additions and
more caution in buffer sizes.
* Implemented reverse_ip expansion operator.
* Bugzilla 937: provide a "debug" ACL control.
* Bugzilla 922: Documentation dusting, patch provided by John Horne.
* Bugzilla 973: Implement --version.
* Bugzilla 752: Refuse to build/run if Exim user is root/0.
* Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
* Bugzilla 816: support multiple condition rules on Routers.
* Add bool_lax{} expansion operator and use that for combining multiple
condition rules, instead of bool{}. Make both bool{} and bool_lax{}
ignore trailing whitespace.
* prevent non-panic DKIM error from being sent to paniclog
* added tcp_wrappers_daemon_name to allow host entries other than
"exim" to be used
* Fix malware regression for cmdline scanner introduced in PP/08.
Notification from Dr Andrew Aitchison.
* Change ClamAV response parsing to be more robust and to handle ClamAV's
ExtendedDetectionInfo response format.
* OpenSSL 1.0.0a compatibility const-ness change, should be backwards
compatible.
