Apart from the DNS cache poisoning attack, Dan did some vital followup work on the Sony CD rootkit discovered by Mark Russinovich. Sony's early defence was that

Apart from the DNS cache poisoning attack, Dan did some vital followup work on the Sony CD rootkit discovered by Mark Russinovich. Sony's early defence was that it wouldn't affect the Internet. Dan showed using DNS caches that it had already affected over half a million networks on the Internet: https://web.archive.org/web/20080423212131/http://www.wired.com/politics/security/news/2005/11/69573 https://web.archive.org/web/20080423212131/http://www.wired.... A smart man and a nice man. RIP.