Vulnerability Details : CVE-2021-27862

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).
Published 2022-09-27 19:15:09
Updated 2022-10-12 13:15:11
Source CERT/CC
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-27862

EPSS FAQ
0.07%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 31 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-27862

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.7
 MEDIUM CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
2.8
1.4
 NIST

CWE ids for CVE-2021-27862

  • The product parses a formatted message or structure, but it does not handle or incorrectly handles a length field that is inconsistent with the actual length of the associated data.
    Assigned by: cret@cert.org (Secondary)
  • This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.
    Assigned by:
    • cret@cert.org (Secondary)
    • nvd@nist.gov (Primary)

References for CVE-2021-27862

Products affected by CVE-2021-27862

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