CentOS Errata and Security Advisory 2006:0603
https://rhn.redhat.com/errata/RHSA-2006-0603.html
The following updated files have been uploaded and are currently syncing to the mirrors:
i386: libtiff-3.6.1-12.i386.rpm libtiff-devel-3.6.1-12.i386.rpm
src: libtiff-3.6.1-12.src.rpm