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CVE-2021-27854
Published: Sep 27, 2022
Modified: Nov 4, 2025
PUBLISHED
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.
| Vendor | Product | Versions |
|---|---|---|
IETF | P802.1Q | affected D1.0 - <= D1.0 |
IETF | draft-ietf-v6ops-ra-guard | affected 08 - <= 08 |
IEEE | 802.2 | affected 802.2h-1997 - <= 802.2h-1997 |
Weaknesses (CWE)
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