Vulnerability Monitor

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CVE-2019-1890

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

2019-07-04T20:15:11.123

Last Modified

2024-11-21T04:37:37.437

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

CVSSv2 Vector

AV:A/AC:L/Au:N/C:N/I:P/A:N

  • Access Vector: ADJACENT_NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: PARTIAL
  • Availability Impact: NONE
Exploitability Score

6.5

Impact Score

2.9

Weaknesses
  • Type: Secondary
    CWE-284
  • Type: Primary
    NVD-CWE-Other
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application cisco application_policy_infrastructure_controller 7.3\(0\)zn\(0.113\) Yes
Hardware cisco 9432pq - No
Hardware cisco 9536pq - No
Hardware cisco 9636pq - No
Hardware cisco 9736pq - No
Hardware cisco n9k-x9432c-s - No
Hardware cisco n9k-x9464px - No
Hardware cisco n9k-x9464tx2 - No
Hardware cisco n9k-x9564px - No
Hardware cisco n9k-x9564tx - No
Hardware cisco n9k-x9636c-r - No
Hardware cisco n9k-x9636c-rx - No
Hardware cisco n9k-x97160yc-ex - No
Hardware cisco n9k-x9732c-ex - No
Hardware cisco n9k-x9732c-fx - No
Hardware cisco n9k-x9736c-ex - No
Hardware cisco n9k-x9736c-fx - No
Hardware cisco n9k-x9788tc-fx - No
Hardware cisco nexus_92160yc-x - No
Hardware cisco nexus_93108tc-ex - No
Hardware cisco nexus_93108tc-fx - No
Hardware cisco nexus_93120tx - No
Hardware cisco nexus_9316d-gx - No
Hardware cisco nexus_93180yc-ex - No
Hardware cisco nexus_93180yc-fx - No
Hardware cisco nexus_93216tc-fx2 - No
Hardware cisco nexus_93240yc-fx2 - No
Hardware cisco nexus_9332c - No
Hardware cisco nexus_93360yc-fx2 - No
Hardware cisco nexus_9336c-fx2 - No
Hardware cisco nexus_9348gc-fxp - No
Hardware cisco nexus_93600cd-gx - No
Hardware cisco nexus_9364c - No
Hardware cisco x9636q-r - No
References