From: Slackware Security Team <security@slackware.com>
To: slackware-security@slackware.com
Subject: [slackware-security] sendmail (SSA:2024-031-01)
Date: Wed, 31 Jan 2024 13:25:31 -0800 (PST)





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[slackware-security] 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 <LF>.<CR><LF>
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:
https://www.cve.org/CVERecord?id=CVE-2023-51765
(* 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
(http://osuosl.org) for donating FTP and rsync hosting
to the Slackware project! :-)

Also see the "Get Slack" section on http://slackware.com for
additional mirror sites near you.

Updated packages for Slackware 15.0:
ftp://ftp.slackware.com/pub/slackware/slackware-15.0/extra/sendmail/sendmail-8.18.1-i586-1_slack15.0.txz
ftp://ftp.slackware.com/pub/slackware/slackware-15.0/extra/sendmail/sendmail-cf-8.18.1-noarch-1_slack15.0.txz

Updated packages for Slackware x86_64 15.0:
ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/extra/sendmail/sendmail-8.18.1-x86_64-1_slack15.0.txz
ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/extra/sendmail/sendmail-cf-8.18.1-noarch-1_slack15.0.txz

Updated packages for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/extra/sendmail/sendmail-8.18.1-i586-1.txz
ftp://ftp.slackware.com/pub/slackware/slackware-current/extra/sendmail/sendmail-cf-8.18.1-noarch-1.txz

Updated packages for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/extra/sendmail/sendmail-8.18.1-x86_64-1.txz
ftp://ftp.slackware.com/pub/slackware/slackware64-current/extra/sendmail/sendmail-cf-8.18.1-noarch-1.txz


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
http://slackware.com/gpg-key
security@slackware.com

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