VLAN Hopping | Switch Spoofing
VLAN Hopping is an attack where the attacker is able to send traffic from one VLAN into another.
VLAN Hopping Can be accomplished in two ways.
Switch Spoofing
Double Tagging
This videos explains the Switch Spoofing Method.
In Switch Spoofing, The attacker tries to negotiate a trunk with the switch by sending DTP packets. For the attack to be successful, the switchport mode should be default “dynamic auto” or “dynamic desirable”
You will have access to all VLANs once you have a trunk to your computer.
You should never configure your interfaces to use the dynamic switchport modes.