Shodan implements a feature to browse vulnerable webcams, including the one that is monitoring your kids while sleeping. The explosion of the paradigm of the Internet of things has dramatically enlarged our surface of attack. It is quite easy to locate vulnerable devices and hack them by using search engines like Shodan and Censys. The operation is quite simple by exploiting the Real Time Streaming Protocol (RTSP, port 554) poorly implemented by the web cams to share video, that lack of authentication mechanism. Administrators need to carefully configure their system before exposing them on the Internet.”]
Source: http://securityaffairs.co/wordpress/43901/hacking/shodan-vulnerable-webcams.html