CentOS Errata and Security Advisory 2005:569
https://rhn.redhat.com/errata/RHSA-2005-569.html
The following updated files have been uploaded and are currently syncing to the mirrors:
files: updates/ia64/RPMS/zlib-1.2.1.2-1.1.ia64.rpm updates/ia64/RPMS/zlib-devel-1.2.1.2-1.1.ia64.rpm