Switch learning broadcast adresses attack
I watched Keith's video : Introduction to Layer-2 switching.
At the end of the video Keith was talking about why a switch will always flood a frame with a broadcast dst address. The reason was because switch only learn mac address of source and a frame will never have a broadcast source address.
This make senses to me but I was thinking if someone create himself a malicious frame with a broadcast address as source. Will the switch learn the mac and forward every frame after this to only the attacker in the network ? If so is this not a big security issues ??