CentOS Errata and Security Advisory 2007:0674
https://rhn.redhat.com/errata/RHSA-2007-0674.html
The following updated files have been uploaded and are currently syncing to the mirrors:
s390: updates/s390/RPMS/perl-Net-DNS-0.31-4.el3.noarch.rpm
s390x: updates/s390x/RPMS/perl-Net-DNS-0.31-4.el3.noarch.rpm