The 802.1q VLAN protocol allows remote attackers to bypass network segmentation and spoof VLAN traffic via a message with two 802.1q tags, which causes the second tag to be redirected from a downstream switch after the first tag has been stripped, as demonstrated by Yersinia, aka double-tagging VLAN jumping attack.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Vlan_protocol | Vlan_protocol | 802.1q (including) | 802.1q (including) |