Ethernet VLAN Stacking vulnerabilities allow for DoS and MitM attacks


Four vulnerabilities in the widely adopted ‘Stacked VLAN’ Ethernet feature allows attackers to perform denial-of-service (DoS) or man-in-the-middle (MitM) attacks against network targets using custom-crafted packets.

Modern routers and switches have a feature called “stacked VLANs” or “VLAN Stacking” that enables businesses to combine multiple VLAN IDs into a single VLAN connection that is shared with an upstream provider.

Although numerous device vendors haven’t finished their investigations, Cisco and Juniper Networks have confirmed that some of their products are affected by the flaws, so the overall impact is still unknown.

Read More: Ethernet VLAN Stacking flaws let hackers launch DoS, MiTM attacks

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