sendmail snapshot 8.18.0.6 is available for testing. This version
addresses the so-called SMTP smuggling problem (CVE-2023-51765) by
being more strict (see the release notes and doc/op/op.*).
This is a beta release for 8.18.1, please test and provide feedback.

8.18.1/8.18.1 202X/XX/XX
sendmail is now stricter in following the RFCs and rejects
some invalid input with respect to line endings
and pipelining:
- Prevent transaction stuffing by ensuring SMTP clients
wait for the HELO/EHLO and DATA response before sending
further SMTP commands. This can be disabled using
the new srv_features option 'F'. Issue reported by
Yepeng Pan and Christian Rossow from CISPA Helmholtz
Center for Information Security.
- Accept only CR LF . CR LF as end of an SMTP message
as required by the RFCs, which can disabled by the
new srv_features option 'O'.
- Do not accept a CR or LF except in the combination
CR LF (as required by the RFCs). These checks can
be disabled by the new srv_features options
'U' and 'G', respectively.
It is recommended to only turn these protections off
for trusted networks due to the potential for abuse.
Full DANE support is available if OpenSSL versions 1.1.1 or 3.x
are used, i.e., TLSA RR 2-x-y and 3-x-y are supported
as required by RFC 7672.
OpenSSL version 3.0.x is supported. Note: OpenSSL 3 loads by
default an openssl.cnf file from a location specified
in the library which may cause unwanted behaviour
in sendmail. Hence sendmail sets the environment
variable OPENSSL_CONF to /etc/mail/sendmail.ossl
to override the default. The file name can be
changed by defining confOPENSSL_CNF in the mc file;
using an empty value prevents setting OPENSSL_CONF.
Note: referring to a file which does not exist does
not cause an an error.
Two new values have been added for {verify}:
"DANE_TEMP": DANE verification failed temporarily.
"DANE_NOTLS": DANE was required but STARTTLS was not
offered by the server.
The default rules return a temporary error for these
cases, so delivery is not attempted.
If the TLS setup code in the client fails and DANE requirements
exist then {verify} will be set to "DANE_TEMP" thus
preventing delivery by default.
DANE related logging has been slightly changed for clarification:
"DANE configured in DNS but no STARTTLS available"
changed to
"DANE configured in DNS but STARTTLS not offered"
When the compile time option USE_EAI is enabled, vacation could
fail to respond when it should (the code change in
8.17.2 was incomplete). Problem reported by Alex
Hautequest.
If SMTPUTF8 BODY=7BIT are used as parameters for the MAIL command
the parsing of UTF8 addresses could fail (USE_EAI).
If a reply to a previous RCPT was received while sending
another RCPT in pipelining mode then parts of the
reply could have been assigned to the wrong RCPT.
New DontBlameSendmail option CertOwner to relax requirement
for certificate public and private key ownership.
Based on suggestion from Marius Strobl of the
FreeBSD project.
clt_features was not checked for connections via Unix domain
sockets.
CONFIG: FEATURE(`enhdnsbl') did not handle multiple replies
from DNS lookups thus potentially causing random
"false negatives".
Note: the fix creates an incompatibility:
the arguments must not have a trailing dot anymore
because the -a. option has been removed (as it only
applies to the entire result, not individual values).
VACATION: Add support for Return-Path header to set sender
to match OpenBSD and NetBSD functionality.
VACATION: Honor RFC3834 and avoid an auto-reply if
'Auto-Submitted: no' is found in the headers to
match OpenBSD and NetBSD functionality.
VACATION: Avoid an auto-reply if a 'List-Id:' is found in
the headers to match OpenBSD functionality.
VACATION: Add support for $SUBJECT in .vacation.msg which
is replaced with the first line of the subject of the
original message to match OpenBSD and NetBSD
functionality.
Portability:
Add support for Darwin 23.
New Files:
cf/feature/fips3.m4
devtools/OS/Darwin.23.x

Available at:
https://ftp.sendmail.org/snapshots/sendmail.8.18.0.6.tar.gz https://ftp.sendmail.org/snapshots/sendmail.8.18.0.6.tar.gz.sig

SHA256 (sendmail.8.18.0.6.tar.gz) = f919d407fe28cb8f7a61d1f99af9f1918ee5c173ab5f4241002f31c790c71c09
SHA256 (sendmail.8.18.0.6.tar.gz.sig) = d0862ee4588ce04dd844db2c1f8aedccbdd9dde4e3645e15720a331b7c25677e

--
Note: please read the netiquette before posting. I will almost never
reply to top-postings which include a full copy of the previous
article(s) at the end because it's annoying, shows that the poster
is too lazy to trim his article, and it's wasting the time of all readers.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)