Bypassing Layer 2 Network Filtering with VLAN 0 Headers, LLC/SNAP Headers, and Ethernet-Wifi Conversion

CVE-2021-27854 · MEDIUM Severity

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using combinations of VLAN 0 headers, LLC/SNAP headers, and converting frames from Ethernet to Wifi and its reverse.

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