Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length (and optionally VLAN0 headers)
References
Link | Resource |
---|---|
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 |
Configurations
History
12 Oct 2022, 13:15
Type | Values Removed | Values Added |
---|---|---|
References |
|
03 Oct 2022, 17:45
Type | Values Removed | Values Added |
---|---|---|
References | (CONFIRM) https://standards.ieee.org/ieee/802.1Q/10323/ - Third Party Advisory | |
References | (CONFIRM) https://standards.ieee.org/ieee/802.2/1048/ - Third Party Advisory | |
References | (CONFIRM) https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/ - Third Party Advisory | |
First Time |
Ietf
Ieee Ieee ieee 802.2 Ietf p802.1q |
|
CPE | cpe:2.3:a:ietf:p802.1q:*:*:*:*:*:*:*:* cpe:2.3:a:ieee:ieee_802.2:*:*:*:*:*:*:*:* |
|
CWE | CWE-290 | |
CVSS |
v2 : v3 : |
v2 : unknown
v3 : 4.7 |
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-2021-27861
Mitre link : CVE-2021-27861
CVE.ORG link : CVE-2021-27861
JSON object : View
Products Affected
ieee
- ieee_802.2
ietf
- p802.1q