New libtiff packages are available for Slackware 9.0, 9.1, 10.0, 10.1, 10.2, 11.0, 12.0, 12.1, 12.2, 13.0, 13.1, and -current to fix security issues.

Here are the details from the Slackware 13.1 ChangeLog:
+--------------------------+
patches/packages/libtiff-3.9.4-i486-2_slack13.1.txz: Rebuilt.
Patched overflows that could lead to arbitrary code execution when parsing
a malformed image file.
For more information, see:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-0192
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1167
(* Security fix *)
+--------------------------+


Where to find the new packages:
+-----------------------------+

HINT: Getting slow download speeds from ftp.slackware.com?
Give slackware.osuosl.org a try. This is another primary FTP site
for Slackware that can be considerably faster than downloading
directly from ftp.slackware.com.

Thanks to the friendly folks at the OSU Open Source Lab
(http://osuosl.org) for donating additional 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 9.0:
ftp://ftp.slackware.com/pub/slackware/slackware-9.0/patches/packages/libtiff-3.8.2-i386-3_slack9.0.tgz

Updated package for Slackware 9.1:
ftp://ftp.slackware.com/pub/slackware/slackware-9.1/patches/packages/libtiff-3.8.2-i486-3_slack9.1.tgz

Updated package for Slackware 10.0:
ftp://ftp.slackware.com/pub/slackware/slackware-10.0/patches/packages/libtiff-3.8.2-i486-3_slack10.0.tgz

Updated package for Slackware 10.1:
ftp://ftp.slackware.com/pub/slackware/slackware-10.1/patches/packages/libtiff-3.8.2-i486-3_slack10.1.tgz

Updated package for Slackware 10.2:
ftp://ftp.slackware.com/pub/slackware/slackware-10.2/patches/packages/libtiff-3.8.2-i486-3_slack10.2.tgz

Updated package for Slackware 11.0:
ftp://ftp.slackware.com/pub/slackware/slackware-11.0/patches/packages/libtiff-3.8.2-i486-4_slack11.0.tgz

Updated package for Slackware 12.0:
ftp://ftp.slackware.com/pub/slackware/slackware-12.0/patches/packages/libtiff-3.8.2-i486-5_slack12.0.tgz

Updated package for Slackware 12.1:
ftp://ftp.slackware.com/pub/slackware/slackware-12.1/patches/packages/libtiff-3.8.2-i486-5_slack12.1.tgz

Updated package for Slackware 12.2:
ftp://ftp.slackware.com/pub/slackware/slackware-12.2/patches/packages/libtiff-3.8.2-i486-5_slack12.2.tgz

Updated package for Slackware 13.0:
ftp://ftp.slackware.com/pub/slackware/slackware-13.0/patches/packages/libtiff-3.8.2-i486-5_slack13.0.txz

Updated package for Slackware x86_64 13.0:
ftp://ftp.slackware.com/pub/slackware/slackware64-13.0/patches/packages/libtiff-3.8.2-x86_64-5_slack13.0.txz

Updated package for Slackware 13.1:
ftp://ftp.slackware.com/pub/slackware/slackware-13.1/patches/packages/libtiff-3.9.4-i486-2_slack13.1.txz

Updated package for Slackware x86_64 13.1:
ftp://ftp.slackware.com/pub/slackware/slackware64-13.1/patches/packages/libtiff-3.9.4-x86_64-2_slack13.1.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/l/libtiff-3.9.4-i486-2.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/l/libtiff-3.9.4-x86_64-2.txz


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

Slackware 9.0 package:
12e422015601177213c20fabecdb3dca libtiff-3.8.2-i386-3_slack9.0.tgz

Slackware 9.1 package:
60824a9f63a4027950adfc2a95b79a8f libtiff-3.8.2-i486-3_slack9.1.tgz

Slackware 10.0 package:
2e7a80f8831edc8d4d23bb8c9947f34a libtiff-3.8.2-i486-3_slack10.0.tgz

Slackware 10.1 package:
71e592bb0d6aa91d9f507df2dbe07ec7 libtiff-3.8.2-i486-3_slack10.1.tgz

Slackware 10.2 package:
e069711795313bcba59be6b17e4f570e libtiff-3.8.2-i486-3_slack10.2.tgz

Slackware 11.0 package:
5221a6dc0bdf39e94eb98c060811844e libtiff-3.8.2-i486-4_slack11.0.tgz

Slackware 12.0 package:
33afedaeb6bd3dfc009a6fff697532b5 libtiff-3.8.2-i486-5_slack12.0.tgz

Slackware 12.1 package:
3b2bd1c0663d635e54dc3bd859ece30a libtiff-3.8.2-i486-5_slack12.1.tgz

Slackware 12.2 package:
7e587b0f33749947092ffec1557aace0 libtiff-3.8.2-i486-5_slack12.2.tgz

Slackware 13.0 package:
b35b2ed471ca18b51ac7b3fdb7c61722 libtiff-3.8.2-i486-5_slack13.0.txz

Slackware x86_64 13.0 package:
45b63bc3d470aab873be4adddc677bba libtiff-3.8.2-x86_64-5_slack13.0.txz

Slackware 13.1 package:
7eeddc014de94b49752017c56ccc573f libtiff-3.9.4-i486-2_slack13.1.txz

Slackware x86_64 13.1 package:
54580a13f5074f62887e1adf3f03fdba libtiff-3.9.4-x86_64-2_slack13.1.txz

Slackware -current package:
c72b2d22fb7c5593150cb384424df247 libtiff-3.9.4-i486-2.txz

Slackware x86_64 -current package:
edd9ed456af33471073f69c68f99163a libtiff-3.9.4-x86_64-2.txz


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

Upgrade the package as root:
# upgradepkg libtiff-3.9.4-i486-2_slack13.1.txz


+-----+

Slackware Linux Security Team
http://slackware.com/gpg-key