This post is a translated summary of the article published for my talk at SSTIC 2014 conference (french).

My Philips Smart TV is a Linux box standing there in my living room : that's a sufficient reason to try to get root.

Debug serial port

pflupg-tool is an unpacking tool for Philips SmartTV firmware (Fusion platform). If your firmware is encrypted, you have to provide the corresponding public key (public exponent + modulus).

You can add public keys in pflupg.h file:

#define PUBLIC_KEYS_CNT 2
// { name, public exponent e (hex string), modulus n (hex string)}
static …