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-4.0.10-i586-1_slack14.2.txz: Upgraded.
This update fixes some denial of service security issues.
For more information, see:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7456
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8905
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10779
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10963
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18661
(* 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-4.0.10-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-4.0.10-x86_64-1_slack14.2.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/l/libtiff-4.0.10-i586-1.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/l/libtiff-4.0.10-x86_64-1.txz


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

Slackware 14.2 package:
1db916b29f97551ae91a53f01223c4d9 libtiff-4.0.10-i586-1_slack14.2.txz

Slackware x86_64 14.2 package:
e148369b44d5ae5a7d4c25ad886a08ab libtiff-4.0.10-x86_64-1_slack14.2.txz

Slackware -current package:
dd17ed4305097923f47f55e06ab227f2 l/libtiff-4.0.10-i586-1.txz

Slackware x86_64 -current package:
08ba21f3c8418f4c5e47919969592121 l/libtiff-4.0.10-x86_64-1.txz


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

Upgrade the package as root:
# upgradepkg libtiff-4.0.10-i586-1_slack14.2.txz

  Libtiff (SSA:2018-316-01) Update for Slackware