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From: Gregory Neil Shapiro (sendmail+gshapirosendmail.org)
Date: Mon May 28 2001 - 11:11:15 CDT
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Sendmail, Inc., and the Sendmail Consortium announce the availability
of sendmail 8.11.4 and 8.12.0.Beta10.
8.11.4 revamps signal handling within the MTA in order to reduce the
likelihood of a race condition that can lead to heap corruption as
described in Michal Zalewski's advisory. The problems discussed in the
advisory are not currently known to be exploitable but we recommend
upgrading to 8.11.4 in case a method is found to exploit the signal
handling race condition. 8.11.4 also fixes other bugs found since the
release of 8.11.3.
8.12.0.Beta10 includes the changes in signal handling from 8.11.4.
Moreover, there is a significant change compared to earlier beta
versions: by default sendmail is installed as a set-group-id binary;
a set-user-id root binary will be only installed if the proper
target is selected (see sendmail/SECURITY). Beta10 fixes also a
few bugs, especially possible core dumps during queue runs and in a
milter application (using smfi_chgheader), possible rejection of
messages due to an uninitialized variable, and omitting queue runs
if queue groups are used and the total number of queue runners is
restricted to less than the sum of the individual queue runners.
Please send bug reports to sendmail-bugssendmail.org and general
feedback to sendmailsendmail.org.
The versions can be found at:
You need either the gzip'ed version (.gz) or the compressed version
(.Z). The .sig files contain the PGP signature of the tar files
(after uncompressing). The PGP signatures were created using the
Sendmail Signing Key/2001, available on the web site
(http://www.sendmail.org/) or on the public key servers.
Since sendmail 8.11 and later includes hooks to cryptography, the
following information from OpenSSL applies to sendmail as well.
PLEASE REMEMBER THAT EXPORT/IMPORT AND/OR USE OF STRONG CRYPTOGRAPHY
SOFTWARE, PROVIDING CRYPTOGRAPHY HOOKS OR EVEN JUST COMMUNICATING
TECHNICAL DETAILS ABOUT CRYPTOGRAPHY SOFTWARE IS ILLEGAL IN SOME
PARTS OF THE WORLD. SO, WHEN YOU IMPORT THIS PACKAGE TO YOUR
COUNTRY, RE-DISTRIBUTE IT FROM THERE OR EVEN JUST EMAIL TECHNICAL
SUGGESTIONS OR EVEN SOURCE PATCHES TO THE AUTHOR OR OTHER PEOPLE
YOU ARE STRONGLY ADVISED TO PAY CLOSE ATTENTION TO ANY EXPORT/IMPORT
AND/OR USE LAWS WHICH APPLY TO YOU. THE AUTHORS ARE NOT LIABLE FOR
ANY VIOLATIONS YOU MAKE HERE. SO BE CAREFUL, IT IS YOUR RESPONSIBILITY.
Clean up signal handling routines to reduce the chances of heap
corruption and other potential race conditions.
Terminating and restarting the daemon may not be
instantaneous due to this change. Also, non-root users can
no longer send out-of-band signals. Problem reported by
Michal Zalewski of BindView.
If LogLevel is greater than 9 and SASL fails to negotiate an
encryption layer, avoid core dump logging the encryption
strength. Problem noted by Miroslav Zubcic of Crol.
If a server offers "AUTH=" and "AUTH " and the list of mechanisms is
different in those two lines, sendmail might not have
recognized (and used) all of the offered mechanisms.
Fix an IP address lookup problem on Solaris 2.0 - 2.3. Patch
from Kenji Miyake.
This time, really don't use the .. directory when expanding
If a process is interrupted while closing a map, don't try to close
the same map again while exiting.
Allow local mailers (F=l) to contact remote hosts (e.g., via
LMTP). Problem noted by Norbert Klasen of the University
If Timeout.QueueReturn was set to a value less the time it took
to write a new queue file (e.g., 0 seconds), the bounce
message would be lost. Problem noted by Lorraine L Goff of
Oklahoma State University.
Pass map argument vector into map rewriting engine for the regex
and prog map types. Problem noted by Stephen Gildea of
InTouch Systems, Inc.
When closing an LDAP map due to a temporary error, close all of the
other LDAP maps which share the original map's connection
to the LDAP server. Patch from Victor Duchovni of
To detect changes of NDBM aliases files check the timestamp of the
.pag file instead of the .dir file. Problem noted by Neil
Rickert of Northern Illinois University.
Don't treat temporary hesiod lookup failures as permanent. Patch
from Werner Wiethege.
If ClientPortOptions is set, make sure to create the outgoing socket
with the family set in that option. Patch from Sean Farley.
Avoid a segmentation fault trying to dereference a NULL pointer
when logging a MaxHopCount exceeded error with an empty
recipient list. Problem noted by Chris Adams of HiWAAY
Fix DSN for "Too many hops" bounces. Problem noticed by Ulrich
Windl of the Universitaet Regensburg.
Fix DSN for "mail loops back to me" bounces. Problem noticed by
Kari Hurtta of the Finnish Meteorological Institute.
OpenBSD has a broken setreuid() implementation.
CONFIG: Undo change from 8.11.1: change 501 SMTP reply code back
to 553 since it is allowed by DRUMS.
CONFIG: Add OSTYPE(freebsd4) for FreeBSD 4.X.
DEVTOOLS: install.sh did not properly handle paths in the source
file name argument. Noted by Kari Hurtta of the Finnish
DEVTOOLS: Add FAST_PID_RECYCLE to compile time options for OpenBSD
since it generates random process ids.
PRALIASES: Add back adaptive algorithm to deal with different endings
of entries in the database (with/without trailing '\0').
Patch from John Beck of Sun Microsystems.
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