Description
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.
Published: 2021-02-24
Score: 7.4 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-6695 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.
History

Sat, 09 Nov 2024 00:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Subscriptions

Cisco Nexus 9000v Nexus 92160yc-x Nexus 92300yc Nexus 92304qc Nexus 92348gc-x Nexus 9236c Nexus 9272q Nexus 93108tc-ex Nexus 93108tc-ex-24 Nexus 93108tc-fx Nexus 93108tc-fx-24 Nexus 93120tx Nexus 93128tx Nexus 9316d-gx Nexus 93180lc-ex Nexus 93180yc-ex Nexus 93180yc-ex-24 Nexus 93180yc-fx Nexus 93180yc-fx-24 Nexus 93180yc-fx3 Nexus 93180yc-fx3s Nexus 93216tc-fx2 Nexus 93240yc-fx2 Nexus 9332c Nexus 9332pq Nexus 93360yc-fx2 Nexus 9336c-fx2 Nexus 9336c-fx2-e Nexus 9336pq Aci Spine Nexus 9348gc-fxp Nexus 93600cd-gx Nexus 9364c Nexus 9364c-gx Nexus 9372px Nexus 9372px-e Nexus 9372tx Nexus 9372tx-e Nexus 9396px Nexus 9396tx Nexus 9508 Nx-os
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2024-11-08T23:39:43.643Z

Reserved: 2020-11-13T00:00:00.000Z

Link: CVE-2021-1228

cve-icon Vulnrichment

Updated: 2024-08-03T16:02:56.129Z

cve-icon NVD

Status : Modified

Published: 2021-02-24T20:15:12.613

Modified: 2024-11-21T05:43:52.683

Link: CVE-2021-1228

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses