[An on-line version of this announcement will be available at
https://www.postfix.org/announcements/postfix-3.8.1.html]
These updates fix minor bugs, and introduce optional features to
address changes in OS platforms and network abuse.
Optional or fixed with Postfix 3.8.1, 3.7.6, 3.6.10, 3.5.20:
* Optional: harden a Postfix SMTP server against remote SMTP
clients that violate RFC 2920 (or 5321) command pipelining
constraints. With "smtpd_forbid_unauth_pipelining = yes", the
server disconnects a client immediately, after responding with
"554 5.5.0 Error: SMTP protocol synchronization" and after
logging "improper command pipelining" with the unexpected remote
SMTP client input. This feature is disabled by default in Postfix
3.5-3.8 to avoid breaking home-grown utilities, but it is enabled
by default in Postfix 3.9. A similar feature is enabled by
default in the Exim SMTP server.
* Optional: some OS distributions crank up TLS security to 11,
and in doing so increase the number of plaintext email deliveries.
This introduces basic OpenSSL configuration file support that
may be used to override OS-level settings.
Details are in the postconf(5) manpage under tls_config_file
and tls_config_name.
* Bugfix (defect introduced: Postfix 1.0): the command "postconf
.. name=v1 .. name=v2 .." (multiple instances of the same
parameter name) created multiple main.cf name=value entries
with the same parameter name. It now logs a warning and skips
the earlier name(s) and value(s). Found during code maintenance.
* Bugfix (defect introduced: Postfix 3.3): the command "postconf
-M name1/type1='name2 type2 ...'" died with a segmentation
violation when the request matched multiple master.cf entries.
The master.cf file was not damaged. Problem reported by SATOH
Fumiyasu.
* Bugfix (defect introduced: Postfix 2.11): the command "postconf
-M name1/type1='name2 type2 ...'" could add a service definition
to master.cf that conflicted with an already existing service
definition. It now replaces all existing service definitions
that match the service pattern 'name1/type1' or the service
name and type in 'name2 type2 ...' with a single service
definition 'name2 type2 ...'. Problem reported by SATOH Fumiyasu.
Fixed with Postfix 3.8.1:
* Bugfix (defect introduced: Postfix 3.8) the posttls-finger
command could access uninitialized memory when reconnecting.
This also fixes a malformed warning message when a destination
contains ":service" information. Reported by Thomas Korbar.
* Bugfix (defect introduced: Postfix 3.2): the MySQL client could
return "not found" instead of "error" (for example, resulting
in a 5XX SMTP status instead of 4XX) during the time that all
MySQL server connections were turned down after error. Found
during code maintenance. File: global/dict_mysql.c. This was
already fixed in Postfix 3.4-3.7.
You can find the updated Postfix source code at the mirrors listed
at https://www.postfix.org/.
Wietse
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