CentOS Errata and Security Advisory 2006:0667
https://rhn.redhat.com/errata/RHSA-2006-0667.html
The following updated files have been uploaded and are currently syncing to the mirrors:
i386: gzip-1.3.3-16.rhel4.i386.rpm
src: gzip-1.3.3-16.rhel4.src.rpm