Two patches used so far from fedora
http://pkgs.fedoraproject.org/cgit/ettercap.git/tree/ettercap-NG-0.7.3-mitm-loop.patch?id=5cc13aeba6815b455884a585f2dcc25e3e1a0466
http://pkgs.fedoraproject.org/cgit/ettercap.git/tree/ettercap-NG-0.7.3-selinux-fcntl.patch?id=5cc13aeba6815b455884a585f2dcc25e3e1a0466
still used in 0.7.5
http://koji.fedoraproject.org/koji/rpminfo?rpmID=3436201