Slackware 1068 Published by

A sendmail security update has been released for Slackware Linux:

sendmail (SSA:2024-031-01)

sendmail (SSA:2024-031-01)

sendmail (SSA:2024-031-01)

New sendmail packages are available for Slackware 15.0 and -current to
fix a security issue.

Here are the details from the Slackware 15.0 ChangeLog:
extra/sendmail/sendmail-8.18.1-i586-1_slack15.0.txz: Upgraded.
sendmail through 8.17.2 allows SMTP smuggling in certain configurations.
Remote attackers can use a published exploitation technique to inject e-mail
messages with a spoofed MAIL FROM address, allowing bypass of an SPF
protection mechanism. This occurs because sendmail supports .
but some other popular e-mail servers do not. This is resolved in 8.18 and
later versions with 'o' in srv_features.
For more information, see:
(* Security fix *)
extra/sendmail/sendmail-cf-8.18.1-noarch-1_slack15.0.txz: Upgraded.

Where to find the new packages:

Thanks to the friendly folks at the OSU Open Source Lab
( for donating FTP and rsync hosting
to the Slackware project! :-)

Also see the "Get Slack" section on for
additional mirror sites near you.

Updated packages for Slackware 15.0:

Updated packages for Slackware x86_64 15.0:

Updated packages for Slackware -current:

Updated packages for Slackware x86_64 -current:

MD5 signatures:

Slackware 15.0 packages:
c3476bc08a89961b1bd85aa41fe0399e sendmail-8.18.1-i586-1_slack15.0.txz
da65abecc807b6af76f1f5f23545c426 sendmail-cf-8.18.1-noarch-1_slack15.0.txz

Slackware x86_64 15.0 packages:
bd5bb1d3ec4e26829eb59361ed1e46cb sendmail-8.18.1-x86_64-1_slack15.0.txz
716fb38618dc85bf5704fa33c1086d2b sendmail-cf-8.18.1-noarch-1_slack15.0.txz

Slackware -current packages:
e7b502527dfbc9050a4c78cdc266e408 sendmail-8.18.1-i586-1.txz
603bcf2ecc861ea275f002636c259c4c sendmail-cf-8.18.1-noarch-1.txz

Slackware x86_64 -current packages:
38c56928fa6feb1709c84405e60b6f72 sendmail-8.18.1-x86_64-1.txz
5fc24831c13249281202717e17e70bae sendmail-cf-8.18.1-noarch-1.txz

Installation instructions:

Upgrade the packages as root:
# upgradepkg sendmail-*.txz

Then, restart sendmail:
# sh /etc/rc.d/rc.sendmail restart


Slackware Linux Security Team