VULNERABILITY

Cisco IOS-XR: CVE-2021-27861: Vulnerabilities in Layer 2 Network Security Controls Affecting Cisco Products: September 2022

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Cisco IOS-XR: CVE-2021-27861: Vulnerabilities in Layer 2 Network Security Controls Affecting Cisco Products: September 2022

Severity
3
CVSS
(AV:A/AC:L/Au:N/C:N/I:P/A:N)
Published
09/27/2022
Created
09/30/2022
Added
09/30/2022
Modified
02/19/2025

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.

Solution(s)

  • update-xros

References

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