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4.7 Medium

CVE-2021-27854 Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using combinations of VLAN 0 headers,…

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.

Affected products and versions

Product Affected versions Fixed in
P802.1Q Versions not published
draft-ietf-v6ops-ra-guard 08 No fix stated
802.2 802.2h-1997 No fix stated

References

Timeline

  1. Published
  2. Last modified

Other CVEs of P802.1Q

The 3 CVEs of P802.1Q →
CVE-2021-27861 Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid… 4.7 Medium CVE-2021-27853 Layer 2 network filtering capabilities such as IPv6 RA guard or ARP inspection can be bypassed using combinations of… 4.7 Medium
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