Database ninja David Litchfield told me he posted the latest in a series of lengthy articles on investigating Oracle database incidents. Specifically, he asked me to review the newest article on Live Response (.pdf) given my background. I recommend checking out the whole set of articles at Database Security.
Speaking of database security, I got a chance to see Alexander Kornbrust of Red-Database-Security GmbH talk about Oracle (in)security at CONFidence 2007. His talk reminded me of comments Thomas Ptacek once made about certain software being indefensible ten years ago, whereas now we have a fighting chance with some software. After hearing Alex's talk I think Oracle belongs in the indefensible category. Oracle appears to be at least five years behind their peer group in terms of producing "secure" code.
(I put "secure" in quotation marks because I don't believe anything is really "secure," but on relative terms Oracle seems far behind those with more robust secure development lifecycles and patch response processes.)