Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
IEEE 802.2
802.2h-1997 to ≤ 802.2h-1997affected
IETF draft-ietf-v6ops-ra-guard
08 to ≤ 08affected
IETF P802.1Q
D1.0 to ≤ D1.0affected
References
- https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/ ↗
- https://standards.ieee.org/ieee/802.2/1048/ ↗
- https://standards.ieee.org/ieee/802.1Q/10323/ ↗
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-VU855201-J3z8CKTX ↗
- https://kb.cert.org/vuls/id/855201 ↗
- https://blog.champtar.fr/VLAN0_LLC_SNAP/ ↗
- https://www.kb.cert.org/vuls/id/855201 ↗