Preparing OSCommerce vs possible Hack attack

[crimsontree]

I received this announcement from my ISP.

 

WARNING: Mass hacker attack this Sunday.

Dear All,

 

Please read this article:

 

http://www.cnn.com/2003/TECH/intern...s.ap/index.html

 

Folks, remember to ensure that all your PHP applications are secure, security fixes applied and updated to the latest versions if possible. We've made sure that our end is as secure as possible but it is important that you all do the same, and advise your clients to follow similar precautionary steps.

 

How do I secure OSCommerce and which relevant security issues are there?

 

Many thanks.