The latest available release of masscan is 1.0.3. In Fedora we have currently 1.0.
http://villadalmine.fedorapeople.org/masscan.spec http://villadalmine.fedorapeople.org/masscan-1.0.3-10.fc20.src.rpm I waiting to upload it ..
http://koji.fedoraproject.org/koji/taskinfo?taskID=7069156
http://koji.fedoraproject.org/koji/taskinfo?taskID=7069194
masscan-1.0.3-1.fc20 has been submitted as an update for Fedora 20. https://admin.fedoraproject.org/updates/masscan-1.0.3-1.fc20
masscan-1.0.3-1.fc19 has been submitted as an update for Fedora 19. https://admin.fedoraproject.org/updates/masscan-1.0.3-1.fc19
Thanks for the update.
masscan-1.0.3-1.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.