CentOS Errata and Security Advisory 2005:357
https://rhn.redhat.com/errata/RHSA-2005-357.html
The following updated files have been uploaded and are currently syncing to the mirrors:
s390: updates/s390/RPMS/gzip-1.3.3-12.rhel3.s390.rpm
s390x: updates/s390x/RPMS/gzip-1.3.3-12.rhel3.s390x.rpm