The only defense right now is to disable Shockwave:
- Type about:plugins, hit enter.
- Find "Shockwave for Director" (no, not Shockwave Flash)
- If you can't find it, good! Otherwise, click "Disable".
In a previous post I was counting over 1 vulnerability per week:
In an even older post I tried to answer some common questions such as "What is Shockwave for Director?"