CVE - CVE-2021-27853

CVE-ID
CVE-2021-27853	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CISCO:20220927 Vulnerabilities in Layer 2 Network Security Controls Affecting Cisco Products: September 2022 URL:https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-VU855201-J3z8CKTX MISC:https://blog.champtar.fr/VLAN0_LLC_SNAP/ MISC:https://kb.cert.org/vuls/id/855201 MISC:https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/ URL:https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/ MISC:https://standards.ieee.org/ieee/802.1Q/10323/ URL:https://standards.ieee.org/ieee/802.1Q/10323/ MISC:https://standards.ieee.org/ieee/802.2/1048/ URL:https://standards.ieee.org/ieee/802.2/1048/
Assigning CNA
CERT/CC
Date Record Created
20210301	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20210301)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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