CVE-2021-27854 Information

Description

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.

Reference

https://standards.ieee.org/ieee/802.2/1048/ https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/ https://standards.ieee.org/ieee/802.1Q/10323/