Executive Summary

Informations
Name CVE-2021-27862 First vendor Publication 2022-09-27
Vendor Cve Last vendor Modification 2022-10-12

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Overall CVSS Score 4.7
Base Score 4.7 Environmental Score 4.7
impact SubScore 1.4 Temporal Score 4.7
Exploitabality Sub Score 2.8
 
Attack Vector Adjacent Attack Complexity Low
Privileges Required None User Interaction None
Scope Changed Confidentiality Impact None
Integrity Impact Low Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length and Ethernet to Wifi frame conversion (and optionally VLAN0 headers).

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27862

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-290 Authentication Bypass by Spoofing

Sources (Detail)

Source Url
CONFIRM https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/
https://standards.ieee.org/ieee/802.2/1048/
MISC https://blog.champtar.fr/VLAN0_LLC_SNAP/
https://kb.cert.org/vuls/id/855201

Alert History

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0
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Date Informations
2022-10-12 17:27:18
  • Multiple Updates
2022-10-03 21:27:13
  • Multiple Updates
2022-09-28 00:27:12
  • First insertion