CVE search · CVE-2021-27854
CVE-2021-27854
medium 4.7
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.
Details
- Status
- Modified
- Published
- Last changed
- Source
- cret@cert.org
- Weakness
- CWE-290
Severity
| Version | Score | Vector | Source |
|---|---|---|---|
| CVSS 3.1 | medium 4.7 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N |
nvd@nist.govPrimary |
| CVSS 3.1 | medium 4.7 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N |
134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary |
Affected products
Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.
References
- 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
- 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
- https://www.kb.cert.org/vuls/id/855201