2006年4月 5日

[installer 722] exim-4.61

exim-4.61 出ています。
Exim monitor の buffer overflow の修正が含まれているようです。

☆ exim-4.61

Exim version 4.61


PH/01 The code for finding all the local interface addresses on a FreeBSD
system running IPv6 was broken. This may well have applied to all BSD
systems, as well as to others that have similar system calls. The broken
code found IPv4 interfaces correctly, but gave incorrect values for the
IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
that it would not match correctly against @[] and not recognize the IPv6
addresses as local.

PH/02 The ipliteral router was not recognizing addresses of the form user@
[ipv6:....] because it didn't know about the "ipv6:" prefix.

PH/03 Added disable_ipv6.

PH/04 Changed $reply_address to use the raw form of the headers instead of the
decoded form, because it is most often used to construct To: headers
lines in autoreplies, and the decoded form may well be syntactically
invalid. However, $reply_address has leading white space removed, and all
newlines turned into spaces so that the autoreply transport does not

PH/05 If group was specified without a user on a router, and no group or user
was specified on a transport, the group from the router was ignored.

PH/06 Increased the number of ACL variables to 20 of each type, and arranged
for visible compile-time settings that can be used to change these
numbers, for those that want even more. Backwards compatibility with old
spool files has been maintained. However, going back to a previous Exim
release will lost any variables that are in spool files.

PH/07 Two small changes when running in the test harness: increase delay when
passing a TCP/IP connection to a new process, in case the original
process has to generate a bounce, and remove special handling of (sic), which is no longer necessary.

PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
be the same on different OS.

PH/09 Moved a debug statement in filter processing to avoid a race problem when

JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
whether --show-vars was specified or not

JJ/02 exipick: Added support for new ACL variable spool format introduced
in 4.61-PH/06

PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
syntactically invalid From: or Reply-to: line, and a filter used this to
generate an autoreply, and therefore failed to obtain an address for the
autoreply, Exim could try to deliver to a non-existent relative file
name, causing unrelated and misleading errors. What now happens is that
it logs this as a hard delivery error, but does not attempt to create a
bounce message.

PH/11 The exinext utility has a -C option for testing purposes, but although
the given file was scanned by exinext itself; it wasn't being passed on
when Exim was called.

PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
an end-of-file indication when reading a command response.

PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
compiled. In many other places in Exim, IPv6 addresses are always
recognized, so I have changed this. It also means that IPv4 domain
literals of the form [IPV4:n.n.n.n] are now always recognized.

PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
used if the router is not running as root, for example, when verifying at
ACL time, or when using -bh. The debugging output from this situation was
non-existent - all you got was a failure to exec. I have made two

(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.

(b) The queryprogram router detects when it is not running as root,
outputs suitable debugging information if -d is set, and then runs
the subprocess without attempting to change uid/gid.

PH/15 Minor change to Makefile for building test_host (undocumented testing

PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
additional section of a DNS packet that returns MX or SRV records.
Instead, it always explicitly searches for A/AAAA records. This avoids
major problems that occur when a DNS server includes only records of one
type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
fixed another bug: if SRV records were looked up and the corresponding
address records were *not* found in the additional section, the port
values from the SRV records were lost.

PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
using the correct key (the original address) when searching the retry
rules in order to find which one to use for generating the retry hint.

PH/18 If quota_warn_message contains a From: header, Exim now refrains from
adding the default one. Similarly, if it contains a Reply-To: header, the
errors_reply_to option, if set, is not used.

PH/19 When calculating a retry time, Exim used to measure the "time since
failure" by looking at the "first failed" field in the retry record. Now
it does not use this if it is later than than the arrival time of the
message. Instead it uses the arrival time. This makes for better
behaviour in cases where some deliveries succeed, thus re-setting the
"first failed" field. An example is a quota failure for a huge message
when small messages continue to be delivered. Without this change, the
"time since failure" will always be short, possible causing more frequent
delivery attempts for the huge message than are intended.

PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
$1, $2, $3) because the numerical variables can be reset during some
expansion items (e.g. "match"), thereby losing the authentication data.

PH/21 Make -bV show the size of off_t variables so that the test suite can
decide whether to run tests for quotas > 2G.

PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
mailbox_size, and mailbox_filecount in the appendfile transport. If a
filecount value is greater than 2G or if a quota value is greater than 2G
on a system where the size of off_t is not greater than 4, a panic error
is given.

PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
never match. The debug and -bh output now contains an explicit error
message indicating a malformed IPv4 address or mask.

PH/24 An host item such as was being treated as the IP address without a mask. Now it is not recognized as an IP address, and
PH/23 above applies.

PH/25 Do not write to syslog when running in the test harness. The only
occasion when this arises is a failure to open the main or panic logs
(for which there is an explicit test).

PH/26 Added the /no_tell option to "control=freeze".

PH/27 If a host name lookup failed very early in a connection, for example, if
the IP address matched host_lookup and the reverse lookup yielded a name
that did not have a forward lookup, an error message of the form "no IP
address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
could be logged. Now it outputs the IP address instead of "NULL".

PH/28 An enabling patch from MH: add new function child_open_exim2() which
allows the sender and the authenticated sender to be set when
submitting a message from within Exim. Since child_open_exim() is
documented for local_scan(), the new function should be too.

PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
results in an empty string is now treated as unset.

PH/30 Fix eximon buffer overflow bug (Bugzilla #73).

PH/31 Added sender_verify_fail logging option.

PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
needed by RFC 822 but not by RFC 2822 was commented out. I have now
tidied the source and removed it altogether.

PH/33 When a queue run was abandoned because the load average was too high, a
log line was always written; now it is written only if the queue_run log
selector is set. In addition, the log line for abandonment now contains
information about the queue run such as the pid. This is always present
in "start" and "stop" lines but was omitted from the "abandon" line.

PH/34 Omit spaces between a header name and the colon in the error message that
is given when verify = headers_syntax fails (if there are lots of them,
the message gets confusing).

PH/35 Change the default for dns_check_names_pattern to allow slashes within
names, as there are now some PTR records that contain slashes. This check
is only to protect against broken name servers that fall over on strange
characters, so the fact that it applies to all lookups doesn't matter.

PH/36 Now that the new test suite is complete, we can remove some of the
special code in Exim that was needed for the old test suite. For example,
sorting DNS records because real resolvers return them in an arbitrary
order. The new test suite's fake resolver always returns records in the
same order.

PH/37 When running in the test harness, use -odi for submitted messages (e.g.
bounces) except when queue_only is set, to avoid logging races between
the different processes.

PH/38 Panic-die if .include specifies a non-absolute path.

PH/39 A tweak to the "H" retry rule from its user.

JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
a label. They prevented compilation on older perls.

JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
a warning to be raised on newish perls.

JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
on queue. Changes to match documented behaviour of showing count of
messages matching specified criteria.

PH/40 Changed the default ident timeout from 30s to 5s.

PH/41 Added support for the use of login_cap features, on those BSD systems
that have them, for controlling the resources used by pipe deliveries.

PH/42 The content-scanning code uses fopen() to create files in which to put
message data. Previously it was not paying any attention to the mode of
the files. Exim runs with umask(0) because the rest of the code creates
files with open(), and sets the required mode explicitly. Thus, these
files were ending up world-writeable. This was not a big issue, because,
being within the spool directory, they were not world-accessible. I have
created a function called modefopen, which takes an additional mode
argument. It sets umask(777), creates the file, chmods it to the required
mode, then resets the umask. All the relevant calls to fopen() in the
content scanning code have been changed to use this function.

PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
to 24 hours. This avoids potential overflow problems when processing G
and H retry rules. I suspect nobody ever tinkers with this value.

PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.

PH/45 When the plaintext authenticator is running as a client, the server's
challenges are checked to ensure they are valid base64 strings. By
default, the authentication attempt is cancelled if an invalid string is
received. Setting client_ignore_invalid_base64 true ignores these errors.
The decoded challenge strings are now placed in $auth1, $auth2, etc. as
they are received. Thus, the responses can be made to depend on the
challenges. If an invalid string is ignored, an empty string is placed in
the variable.

PH/46 Messages that are created by the autoreply transport now contains a
References: header, in accordance with RFCs 2822 and 3834.

PH/47 Added authenticated_sender_force to the smtp transport.

PH/48 The ${prvs expansion was broken on systems where time_t was long long.

PH/49 Installed latest patch from the Sieve maintainer.

PH/50 When an Exim quota was set without a file count quota, and mailbox_size
was also set, the appendfile transport was unnecessarily scanning a
directory of message files (e.g. for maildir delivery) to find the count
of files (along with the size), even though it did not need this
information. It now does the scan only if it needs to find either the
size of the count of files.

PH/51 Added ${time_eval: to convert Exim time strings into seconds.

PH/52 Two bugs concerned with error handling when the smtp transport is
used in LMTP mode:

(i) Exim was not creating retry information for temporary errors given
for individual recipients after the DATA command when the smtp transport
was used in LMTP mode. This meant that they could be retried too
frequently, and not timed out correctly.

(ii) Exim was setting the flag that allows error details to be returned
for LMTP errors on RCPT commands, but not for LMTP errors for individual
recipients that were returned after the DATA command.

PH/53 This is related to PH/52, but is more general: for any failing address,
when detailed error information was permitted to be returned to the
sender, but the error was temporary, then after the final timeout, only
"retry timeout exceeded" was returned. Now it returns the full error as
well as "retry timeout exceeded".

PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
do this, and (what is worse) MTAs that accept it.

PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
will now be deprecated.

PH/56 New os.c-cygwin from the Cygwin maintainer.

JJ/06 exipick: added --unsorted option to allow unsorted output in all output
formats (previously only available in exim formats via -bpr, -bpru,
and -bpra. Now also available in native and exiqgrep formats)

JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
with very large, slow to parse queues

JJ/08 exipick: added ! as generic prefix to negate any criteria format

JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)

PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
responses to authentication challenges, though it was showing the
challenges; (ii) I've removed the CR characters from the debug output for
SMTP output lines.

PH/58 Allow for the insertion of a newline as well as a space when a string
is turned into more than one encoded-word during RFC 2047 encoding. The
Sieve code now uses this.

PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
data_4xx, lost_connection, tls_required.

PH/60 When a VRFY deferred or FAILED, the log message rather than the user
message was being sent as an SMTP response.

PH/61 Add -l and -k options to exicyclog.

PH/62 When verifying, if an address was redirected to one new address, so that
verification continued, and the new address failed or deferred after
having set something in $address_data, the value of $address_data was not
passed back to the ACL. This was different to the case when no
redirection occurred. The value is now passed back in both cases.

PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
HAVE_SETCLASSRESOURCES because there are different APIs in use that all
use login_cap.h, so on its own it isn't the distinguishing feature. The
new name refers directly to the setclassresources() function.

PH/65 Added configuration files for NetBSD3.

PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.

PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
is preferred over IPv4.

PH/68 The bounce_return_message and bounce_return_body options were not being
honoured for bounces generated during the reception of non-SMTP messages.
In particular, this applied to messages rejected by the ACL. This bug has
been fixed. However, if bounce_return_message is true and bounce_return_
body is false, the headers that are returned for a non-SMTP message
include only those that have been read before the error was detected.
(In the case of an ACL rejection, they have all been read.)

PH/69 The HTML version of the specification is now built in a directory called
spec_html instead of spec.html, because the latter looks like a path with
a MIME-type, and this confuses some software.

PH/70 Catch two compiler warnings in sieve.c.

PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
function verify_get_ident() calls ip_connect() to connect a socket, but
if the "connect()" function timed out, ip_connect() used to close the
socket. However, verify_get_ident() also closes the socket later, and in
between Exim writes to the log, which may get opened at this point. When
the socket was closed in ip_connect(), the log could get the same file
descriptor number as the socket. This naturally causes chaos. The fix is
not to close the socket in ip_connect(); the socket should be closed by
the function that creates it. There was only one place in the code where
this was missing, in the iplookup router, which I don't think anybody now
uses, but I've fixed it anyway.

PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
well as to direct DNS lookups. Otherwise the handling of names in host
lists is inconsistent and therefore confusing.


投稿者 xml-rpc : 2006年4月 5日 11:48
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