They range from buffer overflows, to something in the way Oracle communicates with different components," says Litchfield, lead designer and developer at NGSSoftware. "We can actually interject ourselves in between that communications process and run commands as SYSTEM on Windows NT or 2000. If it's running on a Unix system, we can run commands as the Oracle user remotely... So it's obviously very serious."
http://www.securityfocus.com/news/309