FreeBSD Security Advisory - A programming error in the OPIE library could allow an off-by-one buffer overflow to write a single zero byte beyond the end of an on-stack buffer.
131cb41ee3226c91716b15316e0d2870cb7092520923a4ace9a5c051500f74a1
FreeBSD version 8.0 ftpd off-by-one proof of concept exploit.
a17d270d62782bdb0279584ea2dad8c8fe353c35767657f09ffda201da15d4f5