New libtiff packages are available for Slackware 14.2 and -current to fix security issues.

Here are the details from the Slackware 14.2 ChangeLog:
+--------------------------+
patches/packages/libtiff-4.0.9-i586-1_slack14.2.txz: Upgraded.
This release contains security fixes and improvements.
For more information, see:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8128
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5318
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-10095
(* Security fix *)
+--------------------------+


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 package for Slackware 14.2:
ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/libtiff-4.0.9-i586-1_slack14.2.txz

Updated package for Slackware x86_64 14.2:
ftp://ftp.slackware.com/pub/slackware/slackware64-14.2/patches/packages/libtiff-4.0.9-x86_64-1_slack14.2.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/l/libtiff-4.0.9-i586-1.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/l/libtiff-4.0.9-x86_64-1.txz


MD5 signatures:
+-------------+

Slackware 14.2 package:
67d9c6893fd7b9a2c174694c73fb4469 libtiff-4.0.9-i586-1_slack14.2.txz

Slackware x86_64 14.2 package:
69989bfeb42d3643899673e1c5d830e5 libtiff-4.0.9-x86_64-1_slack14.2.txz

Slackware -current package:
3d8957e2b548191e245916dc3747e1e2 l/libtiff-4.0.9-i586-1.txz

Slackware x86_64 -current package:
c331c365d311d9d75a9f985f4da5ae48 l/libtiff-4.0.9-x86_64-1.txz


Installation instructions:
+------------------------+

Upgrade the package as root:
# upgradepkg libtiff-4.0.9-i586-1_slack14.2.txz

  Libtiff (SSA:2017-324-01) Update for Slackware