Layer 2 network filtering capabilities such as IPv6 RA guard or ARP inspection can be bypassed using combinations of VLAN 0 headers and LLC/SNAP headers.
Published 2022-09-27 18:15:10
Updated 2022-11-16 17:26:33
Source CERT/CC
View at NVD,   CVE.org

Products affected by CVE-2021-27853

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Exploit prediction scoring system (EPSS) score for CVE-2021-27853

0.15%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 51 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-27853

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-2021-27853

  • 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-2021-27853

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