The Blizzard Entertainment Battle.net mobile authenticator application that is used as part of an optional two factor authentication scheme to safeguard accounts is vulnerable to a passive eavesdropper during the initialization process which occurs once per the lifetime of a given device.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/94069/blizzard-mitm.txt
Source: https://packetstormsecurity.com/files/94069/Blizzard-Entertainment-Battle.net-Man-In-The-Middle.html