Last week I heard that the TeamSpeak Server is vulnerable to port 51234 attacks and already disabled it on our clanserver. Now there exists a non-public exploit, according to Heise Security. One solution is to either close that port as I did or update to the beta release. All Windows and Linux versions up to and including 220.127.116.11 are affected.
I'm thinking for some months about reimplement the server program in C++ or Perl with security in mind.
Here is the original post by Heise Security. ■