October 12, 2009 — There have been blog postings and questions this weekend regarding the potential to UDP flood an Amazon EC2 instance. We have been investigating this issue and are in contact with the publisher of these experiments. We will provide more details regarding this shortly.
October 13, 2009 — We were able to replicate the conditions that allowed the UDP flood issue described over this weekend. We have implemented changes in EC2 that remove these conditions and prevent the behavior. In addition to our own testing, the party reporting the issue has confirmed that the behavior is no longer reproducible.