Description
A vulnerability in the fabric infrastructure VLAN connection establishment of the Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software could allow an unauthenticated, adjacent attacker to bypass security validations and connect an unauthorized server to the infrastructure VLAN. The 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 malicious LLDP packet on the adjacent subnet to the Cisco Nexus 9000 Series Switch in ACI mode. 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: 2019-07-04
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Advisories
Source ID Title
EUVD EUVD EUVD-2019-10447 A vulnerability in the fabric infrastructure VLAN connection establishment of the Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software could allow an unauthenticated, adjacent attacker to bypass security validations and connect an unauthorized server to the infrastructure VLAN. The 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 malicious LLDP packet on the adjacent subnet to the Cisco Nexus 9000 Series Switch in ACI mode. 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

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Subscriptions

Cisco 9432pq 9536pq 9636pq 9736pq Application Policy Infrastructure Controller N9k-x9432c-s N9k-x9464px N9k-x9464tx2 N9k-x9564px N9k-x9564tx N9k-x9636c-r N9k-x9636c-rx N9k-x97160yc-ex N9k-x9732c-ex N9k-x9732c-fx N9k-x9736c-ex N9k-x9736c-fx N9k-x9788tc-fx Nexus 92160yc-x Nexus 93108tc-ex Nexus 93108tc-fx Nexus 93120tx Nexus 9316d-gx Nexus 93180yc-ex Nexus 93180yc-fx Nexus 93216tc-fx2 Nexus 93240yc-fx2 Nexus 9332c Nexus 93360yc-fx2 Nexus 9336c-fx2 Nexus 9348gc-fxp Nexus 93600cd-gx Nexus 9364c X9636q-r
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2024-11-21T19:20:08.670Z

Reserved: 2018-12-06T00:00:00.000Z

Link: CVE-2019-1890

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-07-04T20:15:11.123

Modified: 2024-11-21T04:37:37.437

Link: CVE-2019-1890

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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Weaknesses