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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-27853 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://blog.champtar.fr/VLAN0_LLC_SNAP/ Exploit  Third Party Advisory 
https://blog.champtar.fr/VLAN0_LLC_SNAP/ Exploit  Third Party Advisory 
https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/ Technical Description  Third Party Advisory 
https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/ Technical Description  Third Party Advisory 
https://kb.cert.org/vuls/id/855201 Third Party Advisory  US Government Resource 
https://kb.cert.org/vuls/id/855201 Third Party Advisory  US Government Resource 
https://standards.ieee.org/ieee/802.1Q/10323/ Vendor Advisory 
https://standards.ieee.org/ieee/802.1Q/10323/ Vendor Advisory 
https://standards.ieee.org/ieee/802.2/1048/ Vendor Advisory 
https://standards.ieee.org/ieee/802.2/1048/ Vendor Advisory 
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-VU855201-J3z8CKTX Third Party Advisory 
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-VU855201-J3z8CKTX Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-290 Authentication Bypass by Spoofing cwe source acceptance level NIST   CERT/CC  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

10 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-27853
NVD Published Date:
09/27/2022
NVD Last Modified:
11/21/2024
Source:
CERT/CC