So is this a Red Hat problem?
Yes, it is. And that was my point. This is not a "Linux" problem; it is a wu-ftpd and RedHat problem.
Here is the BugTraq entry for the security exploit in question. It says that the WU-FTP version 2.6.0.* RPM packages is vunderable on their Intel, SPARC, Alpha,and PPC versions of Linux. WU-FTP runs on SunOS, AIX, IRIX, SCO Unix, DEC OSF (now Compaq Tru64), *BSD, and Linux. It could very well mean that 2.6.0 is vunderable on many more versions of unix.
The patch is being released by the German competition to RedHat, SuSE Linux