All of these are obsolete. Get a newer (or even current) distro, and you'll be even safer.
RH9 is not all that bad, its the base for RHEL 2.1 which is not out of date and there are patches out there under Fedora Legacy..
Actually, if security is your chief priority it's better not to use a current distro. The advantage of running an older distro is that at this point they have been thoroughly audited and are unlikely to have hacker-known vulnerabilities. If go with the bleeding edge, you get nifty new toys, but the trade off is that they haven't been as thoroughly debugged/security hardened as older software.