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 2.0.23.17 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.
about security, BSD, open source and programming.