loving this blog entry!
so i did a bit of research into this to wonder if this could be exploitable outside of linux. turns out possibly!
there is a custom xmpp/jabber client that uses the gstreamer-0.10 vulnerable library libgstnsf.dll/so for windows and mac osx for inline multimedia playback. ;)
potentially if you were going to create a windows or mac-specific NSF and send it to another user that used the OOB bankswitching trick and then initialized OS-specific shell code you could take advantage of this vulnerability using Gajim. ;)
http://gajim.org
subsequently all gstreamer MSI install libraries, standard or development, for windows (potentially mac) on the main gstreamer site do not include "bad plugins" which include libgstnsf.dll. you would have to use mingw/darwin to compile the bad plugin yourself. :)
https://gstreamer.freedesktop.org/
anyone want to try to exploit one another using Gajim and a custom NSF? ;)