New CUPS packages are available for CentOS-3 3.3 x86_64. Refer to
https://rhn.redhat.com/errata/RHSA-2005-013.html.

RPMS/cups-1.1.17-13.3.22.x86_64.rpm
RPMS/cups-devel-1.1.17-13.3.22.x86_64.rpm
RPMS/cups-libs-1.1.17-13.3.22.i386.rpm
RPMS/cups-libs-1.1.17-13.3.22.x86_64.rpm
SRPMS/cups-1.1.17-13.3.22.src.rpm

Execute "yum update cups" to apply.