Bypassing Layer 2 Network Filtering with VLAN 0 and LLC/SNAP Headers

CVE-2021-27853 · 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 or ARP inspection can be bypassed using combinations of VLAN 0 headers and LLC/SNAP headers.

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