These are the slides from the presentation “VoIP Wars: Attack of the Cisco Phones” from the talk given at Defcon 22 and Blackhat USA 2014.
You can download it from the following link: https://packetstormsecurity.com/files/download/127902/VoIPWars-AttackoftheCiscoPhones-v.2.0.pdf
Source: https://packetstormsecurity.com/files/127902/VoIP-Wars-Attack-Of-The-Cisco-Phones.html