It is not part of some other Linux-based operating systems.
So, no, it's not a "Linux" problem. It's a wu-ftpd problem. There have been many, many wu-ftpd holes in the past, most of which were worse than this one. That's why anyone with a clue is no longer using wu-ftpd. And, yes, RedHat deserves a thwack of the cluestick for still using that pile of steaming feces that is wu-ftpd.