I am not in any way officially speaking for fedora, Just my 2ct:
1. FSF is very explicit about GPL and CDDL:
This means a module covered by the GPL and a module covered by the
CDDL cannot legally be linked together. We urge you not to use the
CDDL for this reason.
So at this point it seems to be illegal to distribute mkisofs. I wonder
if one could use a special exception (I asked FSF europe once on
licensing an eclipse plugin but that was GPL'd source distributed with
EPL components, not sure if that applies here.).
2. Jörg, could you please be more verbosive about why exactly fedora is
currently violating UrhG? I cannot see how how you could revoke a once
granted license because they use "your" filenames. Especially: Which
marks do you claim are required because of §13 and since cdrkit is a
derived work how do debian developers in _any_ way change _your_ work?