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.
References
| Link | Resource |
|---|---|
| https://blog.champtar.fr/VLAN0_LLC_SNAP/ | |
| https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/ | Vendor Advisory |
| https://kb.cert.org/vuls/id/855201 | |
| https://standards.ieee.org/ieee/802.1Q/10323/ | Vendor Advisory |
| https://standards.ieee.org/ieee/802.2/1048/ | Vendor Advisory |
Configurations
History
12 Oct 2022, 13:15
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
04 Oct 2022, 13:24
| Type | Values Removed | Values Added |
|---|---|---|
| References | (CONFIRM) https://standards.ieee.org/ieee/802.1Q/10323/ - Vendor Advisory | |
| References | (CONFIRM) https://standards.ieee.org/ieee/802.2/1048/ - Vendor Advisory | |
| References | (CONFIRM) https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/ - Vendor Advisory | |
| CPE | cpe:2.3:a:ietf:p802.1q:*:*:*:*:*:*:*:* cpe:2.3:a:ieee:ieee_802.2:*:*:*:*:*:*:*:* |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 4.7 |
| First Time |
Ietf
Ieee Ieee ieee 802.2 Ietf p802.1q |
|
| CWE | CWE-290 |
27 Sep 2022, 19:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2022-09-27 19:15
Updated : 2023-12-10 14:35
NVD link : CVE-2021-27854
Mitre link : CVE-2021-27854
CVE.ORG link : CVE-2021-27854
JSON object : View
Products Affected
ieee
- ieee_802.2
ietf
- p802.1q
CWE
CWE-290
Authentication Bypass by Spoofing