high
7.4
CWE
284
Advisory Published
Updated

CVE-2021-1228: Cisco Nexus 9000 Series Fabric Switches ACI Mode Fabric Infrastructure VLAN Unauthorized Access Vulnerability

First published: Wed Feb 24 2021(Updated: )

A vulnerability in the fabric infrastructure VLAN connection establishment of Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) Mode could allow an unauthenticated, adjacent attacker to bypass security validations and connect an unauthorized server to the infrastructure VLAN. This vulnerability is due to insufficient security requirements during the Link Layer Discovery Protocol (LLDP) setup phase of the infrastructure VLAN. An attacker could exploit this vulnerability by sending a crafted LLDP packet on the adjacent subnet to an affected device. A successful exploit could allow the attacker to connect an unauthorized server to the infrastructure VLAN, which is highly privileged. With a connection to the infrastructure VLAN, the attacker can make unauthorized connections to Cisco Application Policy Infrastructure Controller (APIC) services or join other host endpoints.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Nx-os=11.0\(1b\)
Cisco Nx-os=11.0\(1c\)
Cisco Nx-os=11.0\(1d\)
Cisco Nx-os=11.0\(1e\)
Cisco Nx-os=11.0\(2j\)
Cisco Nx-os=11.0\(2m\)
Cisco Nx-os=11.0\(3f\)
Cisco Nx-os=11.0\(3i\)
Cisco Nx-os=11.0\(3k\)
Cisco Nx-os=11.0\(3n\)
Cisco Nx-os=11.0\(3o\)
Cisco Nx-os=11.0\(4g\)
Cisco Nx-os=11.0\(4h\)
Cisco Nx-os=11.0\(4o\)
Cisco Nx-os=11.0\(4q\)
Cisco Nx-os=11.1\(1j\)
Cisco Nx-os=11.1\(1o\)
Cisco Nx-os=11.1\(1r\)
Cisco Nx-os=11.1\(1s\)
Cisco Nx-os=11.1\(2h\)
Cisco Nx-os=11.1\(2i\)
Cisco Nx-os=11.1\(3f\)
Cisco Nx-os=11.1\(4e\)
Cisco Nx-os=11.1\(4f\)
Cisco Nx-os=11.1\(4g\)
Cisco Nx-os=11.1\(4i\)
Cisco Nx-os=11.1\(4l\)
Cisco Nx-os=11.1\(4m\)
Cisco Nx-os=11.2\(1i\)
Cisco Nx-os=11.2\(1k\)
Cisco Nx-os=11.2\(1m\)
Cisco Nx-os=11.2\(2g\)
Cisco Nx-os=11.2\(2h\)
Cisco Nx-os=11.2\(2i\)
Cisco Nx-os=11.2\(2j\)
Cisco Nx-os=11.2\(3c\)
Cisco Nx-os=11.2\(3e\)
Cisco Nx-os=11.2\(3h\)
Cisco Nx-os=11.2\(3m\)
Cisco Nx-os=11.3\(1g\)
Cisco Nx-os=11.3\(1h\)
Cisco Nx-os=11.3\(1i\)
Cisco Nx-os=11.3\(1j\)
Cisco Nx-os=11.3\(2f\)
Cisco Nx-os=11.3\(2h\)
Cisco Nx-os=11.3\(2i\)
Cisco Nx-os=11.3\(2j\)
Cisco Nx-os=11.3\(2k\)
Cisco Nx-os=12.0\(1m\)
Cisco Nx-os=12.0\(1n\)
Cisco Nx-os=12.0\(1o\)
Cisco Nx-os=12.0\(1p\)
Cisco Nx-os=12.0\(1q\)
Cisco Nx-os=12.0\(1r\)
Cisco Nx-os=12.0\(2f\)
Cisco Nx-os=12.0\(2g\)
Cisco Nx-os=12.0\(2h\)
Cisco Nx-os=12.0\(2l\)
Cisco Nx-os=12.0\(2m\)
Cisco Nx-os=12.0\(2n\)
Cisco Nx-os=12.0\(2o\)
Cisco Nx-os=12.1\(1h\)
Cisco Nx-os=12.1\(1i\)
Cisco Nx-os=12.1\(2e\)
Cisco Nx-os=12.1\(2g\)
Cisco Nx-os=12.1\(2k\)
Cisco Nx-os=12.1\(3g\)
Cisco Nx-os=12.1\(3h\)
Cisco Nx-os=12.1\(3j\)
Cisco Nx-os=12.1\(4a\)
Cisco Nx-os=12.2\(1k\)
Cisco Nx-os=12.2\(1n\)
Cisco Nx-os=12.2\(1o\)
Cisco Nx-os=12.2\(2e\)
Cisco Nx-os=12.2\(2f\)
Cisco Nx-os=12.2\(2i\)
Cisco Nx-os=12.2\(2j\)
Cisco Nx-os=12.2\(2k\)
Cisco Nx-os=12.2\(2q\)
Cisco Nx-os=12.2\(3j\)
Cisco Nx-os=12.2\(3p\)
Cisco Nx-os=12.2\(3r\)
Cisco Nx-os=12.2\(3s\)
Cisco Nx-os=12.2\(3t\)
Cisco Nx-os=12.2\(4f\)
Cisco Nx-os=12.2\(4p\)
Cisco Nx-os=12.2\(4q\)
Cisco Nx-os=12.2\(4r\)
Cisco Nx-os=12.3\(1e\)
Cisco Nx-os=12.3\(1f\)
Cisco Nx-os=12.3\(1i\)
Cisco Nx-os=12.3\(1l\)
Cisco Nx-os=12.3\(1o\)
Cisco Nx-os=12.3\(1p\)
Cisco Nx-os=13.0\(1k\)
Cisco Nx-os=13.0\(2h\)
Cisco Nx-os=13.0\(2k\)
Cisco Nx-os=13.0\(2n\)
Cisco Nx-os=13.1\(1i\)
Cisco Nx-os=13.1\(2m\)
Cisco Nx-os=13.1\(2o\)
Cisco Nx-os=13.1\(2p\)
Cisco Nx-os=13.1\(2q\)
Cisco Nx-os=13.1\(2s\)
Cisco Nx-os=13.1\(2t\)
Cisco Nx-os=13.1\(2u\)
Cisco Nx-os=13.1\(2v\)
Cisco Nx-os=13.2\(1l\)
Cisco Nx-os=13.2\(1m\)
Cisco Nx-os=13.2\(2l\)
Cisco Nx-os=13.2\(2o\)
Cisco Nx-os=13.2\(3i\)
Cisco Nx-os=13.2\(3j\)
Cisco Nx-os=13.2\(3n\)
Cisco Nx-os=13.2\(3o\)
Cisco Nx-os=13.2\(3r\)
Cisco Nx-os=13.2\(3s\)
Cisco Nx-os=13.2\(4d\)
Cisco Nx-os=13.2\(4e\)
Cisco Nx-os=13.2\(5d\)
Cisco Nx-os=13.2\(5e\)
Cisco Nx-os=13.2\(5f\)
Cisco Nx-os=13.2\(6i\)
Cisco Nx-os=13.2\(7f\)
Cisco Nx-os=13.2\(7k\)
Cisco Nx-os=13.2\(8d\)
Cisco Nx-os=13.2\(9b\)
Cisco Nx-os=13.2\(9f\)
Cisco Nx-os=13.2\(9h\)
Cisco Nx-os=13.2\(41d\)
Cisco Nx-os=14.0\(1h\)
Cisco Nx-os=14.0\(2c\)
Cisco Nx-os=14.0\(3c\)
Cisco Nx-os=14.0\(3d\)
Cisco Nx-os=14.1\(1i\)
Cisco Nx-os=14.1\(1j\)
Cisco Nx-os=14.1\(1k\)
Cisco Nx-os=14.1\(1l\)
Cisco Nx-os=14.1\(2g\)
Cisco Nx-os=14.1\(2m\)
Cisco Nx-os=14.1\(2o\)
Cisco Nx-os=14.1\(2s\)
Cisco Nx-os=14.1\(2u\)
Cisco Nx-os=14.1\(2w\)
Cisco Nx-os=14.1\(2x\)
Cisco Nx-os=14.2\(1i\)
Cisco Nx-os=14.2\(1j\)
Cisco Nx-os=14.2\(1l\)
Cisco Nx-os=14.2\(2e\)
Cisco Nx-os=14.2\(2f\)
Cisco Nx-os=14.2\(3j\)
Cisco Nx-os=14.2\(3l\)
Cisco Nx-os=14.2\(3n\)
Cisco Nx-os=14.2\(3q\)
Cisco Nx-os=14.2\(4i\)
Cisco Nx-os=14.2\(4k\)
Cisco Nx-os=14.2\(4o\)
Cisco Nx-os=14.2\(4p\)
Cisco Nx-os=14.2\(5k\)
Cisco Nx-os=15.0\(1k\)
Cisco Nx-os=15.0\(1l\)
Cisco Nx-os=15.0\(2h\)
Cisco Nexus 9000v
Cisco Nexus 92160yc-x
Cisco Nexus 92300yc
Cisco Nexus 92304qc
Cisco Nexus 92348gc-x
Cisco Nexus 9236c
Cisco Nexus 9272q
Cisco Nexus 93108tc-ex
Cisco Nexus 93108tc-ex-24
Cisco Nexus 93108tc-fx
Cisco Nexus 93108tc-fx-24
Cisco Nexus 93120tx
Cisco Nexus 93128tx
Cisco Nexus 9316d-gx
Cisco Nexus 93180lc-ex
Cisco Nexus 93180yc-ex
Cisco Nexus 93180yc-ex-24
Cisco Nexus 93180yc-fx
Cisco Nexus 93180yc-fx-24
Cisco Nexus 93180yc-fx3
Cisco Nexus 93180yc-fx3s
Cisco Nexus 93216tc-fx2
Cisco Nexus 93240yc-fx2
Cisco Nexus 9332c
Cisco Nexus 9332pq
Cisco Nexus 93360yc-fx2
Cisco Nexus 9336c-fx2
Cisco Nexus 9336c-fx2-e
Cisco Nexus 9336pq Aci Spine
Cisco Nexus 9348gc-fxp
Cisco Nexus 93600cd-gx
Cisco Nexus 9364c
Cisco Nexus 9364c-gx
Cisco Nexus 9372px
Cisco Nexus 9372px-e
Cisco Nexus 9372tx
Cisco Nexus 9372tx-e
Cisco Nexus 9396px
Cisco Nexus 9396tx
Cisco Nexus 9508

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