Smart TVs are just dumb TVs with a computer and a network connection, right? In a variation of rule 34, if it has a computer in it, someone will hack it. When [smarttvhacker] bought a Sony 48 inch smart TV, he noticed all the software licenses listed in the manual and realized that was a big leg up into hacking the TV.
We don’t have a comparable Sony model, but [smarttvhacker’s] post is a veritable travel log of his journey from TV viewer to TV ruler. By analyzing everything from network port scans to a dump of a firmware upgrade, he wound up being able to install a telnet server.
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[DoctorBeet] noticed the advertisements on the landing screen of his new LG smart television and started wondering about tracking. His curiosity got the better of him when he came across a promotional video aimed at advertisers that boasts about the information gathered from people who use these TVs. He decided to sniff the web traffic. If what he discovered is accurate, there is an invasive amount of data being collect by this hardware. To make matters worse, his testing showed that even if the user switches the “Collection of watching info” menu item to off it doesn’t stop the data from being phoned home.
The findings start off rather innocuous, with the channel name and a unique ID being transmitted every time you change the station. Based on when the server receives the packets a description of your schedule and preferred content can be put together. This appears to be sent as plain data without any type of encryption or obfuscation.
Things get a lot more interesting when he discovers that filenames from a USB drive connected to the television are being broadcast as well. The server address they’re being sent to is a dead link — which makes us think this is some type of debugging step that was left in the production firmware — but it is still a rather sizable blunder when it comes to personal privacy. If you have one of these televisions [DoctorBeet] has a preliminary list of URLs to block with your router in order to help safeguard your privacy.
[Tony] decided his “smart” LED TV wasn’t quite smart enough. So he stuffed a Raspberry Pi in it.
Upon opening the case of his 40″ Hisense Smart LED TV, he discovered that the logic board actually had two unused USB pads — what luck! He tapped off of them to get 5V @ 500mA to power the Pi… Later on he realized this wasn’t the ideal solution — when the TV turned off, it cut the Pi’s power too. So he pulled out his multimeter and probed the board, this time finding a 5V source that remained on while the unit was plugged in.
Next up was the placement of the Raspberry Pi. The included speakers on this particular TV weren’t that good, and since [Tony] uses a surround sound system anyway, he decided to make use of their space better. Cutting out the grill and removing the whole assembly left him with more than enough room to store the Pi and mount a 3D printed LAN and USB port cover!
He’s running Raspbmc which lends the TV tons of functionality. If you don’t mind voiding your warranty, this is a great hack!