Linux Botnet

The Register reports a new linux server botnet originally reported here. It is not yet clear how the servers are infectected. The purpuse of these servers is to serve malware from an additional webserver installed on listening on port 8080. It seems to me that people look at their web forum security again very closely: Not only can be used to exploit a server, but also if it is possible to post links at public discussion sites it is also possible to post links to such malware.