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CVE PROGRAM SOURCE RECORD4.7 Medium

CVE-2021-27861

L2 network filtering bypass using stacked VLAN0 and LLC/SNAP headers with invalid lengths

Description

Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length (and optionally VLAN0 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