CVE-2021-27861
4.7MEDIUMLayer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length (and optionally VLAN0 headers)
Veröffentlicht: 9/27/2022Aktualisiert: 11/4/2025
Beschreibung
Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length (and optionally VLAN0 headers)
KI-AnalyseKI-gestützt
Betroffene Produkte
ieeeieee_802.2
ietfp802.1q
Referenzen
- https://blog.champtar.fr/VLAN0_LLC_SNAP/
- https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/Third Party Advisory
- https://kb.cert.org/vuls/id/855201
- https://standards.ieee.org/ieee/802.1Q/10323/Third Party Advisory
- https://standards.ieee.org/ieee/802.2/1048/Third Party Advisory
- https://blog.champtar.fr/VLAN0_LLC_SNAP/
- https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/Third Party Advisory
- https://kb.cert.org/vuls/id/855201
- https://standards.ieee.org/ieee/802.1Q/10323/Third Party Advisory
- https://standards.ieee.org/ieee/802.2/1048/Third Party Advisory
- https://www.kb.cert.org/vuls/id/855201