Setting /etc/ssh/moduli to mode 0600 adds very little security: it's straightforward to probe the contents by connecting over ssh and politely asking the server to do a group exchange. On the other hand, making /etc/ssh/moduli unreadable by non-root users causes a real problem: it prevents things like Paramiko from reading and using it as a source of kex groups. Ubuntu, by comparison, sets the mode to 0644.
You are right, this is public information.
openssh-6.4p1-4.fc20 has been submitted as an update for Fedora 20. https://admin.fedoraproject.org/updates/openssh-6.4p1-4.fc20
Package openssh-6.4p1-4.fc20: * should fix your issue, * was pushed to the Fedora 20 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing openssh-6.4p1-4.fc20' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2014-6380/openssh-6.4p1-4.fc20 then log in and leave karma (feedback).
openssh-6.2p2-8.fc19 has been submitted as an update for Fedora 19. https://admin.fedoraproject.org/updates/openssh-6.2p2-8.fc19
openssh-6.4p1-4.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.
openssh-6.2p2-8.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.