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:
s390: updates/s390/RPMS/libtiff-3.6.1-12.s390.rpm updates/s390/RPMS/libtiff-devel-3.6.1-12.s390.rpm
s390x: updates/s390x/RPMS/libtiff-3.6.1-12.s390x.rpm updates/s390x/RPMS/libtiff-devel-3.6.1-12.s390x.rpm