I am trying understand one thing about the KRACK attack. I see explanations like this everywhere:
The hacker interferes with the initial handshake between your device and the WiFi router in a way that allows the attacker to gain an ability to decrypt the traffic you exchange over WiFi.
Ok, but what traffic exactly is this? Let's say in my house I have a patched router, a patched iPhone and an unpatched WiFi camera. Seeing here the weak link is my camera, if it gets attacked, can the hacker sniff the whole traffic including my iPhone, or only the traffic between the vulnerable device (camera) and the router?