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Cisco Nexus 9000 Series Fabric Switches ACI Mode Link Layer Discovery Protocol Port Denial of Service Vulnerability

cisco-sa-apic-lldap-dos-WerV9CFj · Medium · Published · Updated

A vulnerability in the Link Layer Discovery Protocol (LLDP) for Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, adjacent attacker to disable switching on a small form-factor pluggable (SFP) interface. This vulnerability is due to incomplete validation of the source of a received LLDP packet. An attacker could exploit this vulnerability by sending a crafted LLDP packet on an SFP interface to an affected device. A successful exploit could allow the attacker to disable switching on the SFP interface, which could disrupt network traffic. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apic-lldap-dos-WerV9CFj

Cisco advisory ·CSAF JSON

Workarounds

There are no workarounds that address this vulnerability.

CVEsCVE-2021-1231
Cisco Bug IDsCSCvu84570
CVSS ScoreBase 4.7
Base 4.7 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L/E:X/RL:X/RC:X
Product Names From Source
Cisco NX-OS System Software in ACI Mode 13.2(1l), Cisco NX-OS System Software in ACI Mode 13.2(1m), Cisco NX-OS System Software in ACI Mode 13.2(2l), Cisco NX-OS System Software in ACI Mode 13.2(2o), Cisco NX-OS System Software in ACI Mode 13.2(3i), Cisco NX-OS System Software in ACI Mode 13.2(3n), Cisco NX-OS System Software in ACI Mode 13.2(3o), Cisco NX-OS System Software in ACI Mode 13.2(3r), Cisco NX-OS System Software in ACI Mode 13.2(4d), Cisco NX-OS System Software in ACI Mode 13.2(4e), Cisco NX-OS System Software in ACI Mode 13.2(3j), Cisco NX-OS System Software in ACI Mode 13.2(3s), Cisco NX-OS System Software in ACI Mode 13.2(5d), Cisco NX-OS System Software in ACI Mode 13.2(5e), Cisco NX-OS System Software in ACI Mode 13.2(5f), Cisco NX-OS System Software in ACI Mode 13.2(6i), Cisco NX-OS System Software in ACI Mode 13.2(41d), Cisco NX-OS System Software in ACI Mode 13.2(7f), Cisco NX-OS System Software in ACI Mode 13.2(7k), Cisco NX-OS System Software in ACI Mode 13.2(9b), Cisco NX-OS System Software in ACI Mode 13.2(8d), Cisco NX-OS System Software in ACI Mode 13.2(9f), Cisco NX-OS System Software in ACI Mode 13.2(9h), Cisco NX-OS System Software in ACI Mode 14.0(1h), Cisco NX-OS System Software in ACI Mode 14.0(2c), Cisco NX-OS System Software in ACI Mode 14.0(3d), Cisco NX-OS System Software in ACI Mode 14.0(3c), Cisco NX-OS System Software in ACI Mode 14.1(1i), Cisco NX-OS System Software in ACI Mode 14.1(1j), Cisco NX-OS System Software in ACI Mode 14.1(1k), Cisco NX-OS System Software in ACI Mode 14.1(1l), Cisco NX-OS System Software in ACI Mode 14.1(2g), Cisco NX-OS System Software in ACI Mode 14.1(2m), Cisco NX-OS System Software in ACI Mode 14.1(2o), Cisco NX-OS System Software in ACI Mode 14.1(2s), Cisco NX-OS System Software in ACI Mode 14.1(2u), Cisco NX-OS System Software in ACI Mode 14.1(2w), Cisco NX-OS System Software in ACI Mode 14.1(2x), Cisco NX-OS System Software in ACI Mode 14.2(1i), Cisco NX-OS System Software in ACI Mode 14.2(1j), Cisco NX-OS System Software in ACI Mode 14.2(1l), Cisco NX-OS System Software in ACI Mode 14.2(2e), Cisco NX-OS System Software in ACI Mode 14.2(2f), Cisco NX-OS System Software in ACI Mode 14.2(2g), Cisco NX-OS System Software in ACI Mode 14.2(3j), Cisco NX-OS System Software in ACI Mode 14.2(3l), Cisco NX-OS System Software in ACI Mode 14.2(3n), Cisco NX-OS System Software in ACI Mode 14.2(3q), Cisco NX-OS System Software in ACI Mode 14.2(4i), Cisco NX-OS System Software in ACI Mode 14.2(4k), Cisco NX-OS System Software in ACI Mode 14.2(4o), Cisco NX-OS System Software in ACI Mode 14.2(4p), Cisco NX-OS System Software in ACI Mode 14.2(5k), Cisco NX-OS System Software in ACI Mode 15.0(1k), Cisco NX-OS System Software in ACI Mode 15.0(1l), Cisco NX-OS System Software in ACI Mode 15.0(2e), Cisco NX-OS System Software in ACI Mode 15.0(2h), Cisco NX-OS System Software in ACI Mode, Cisco Nexus 9000 Series Switches

CSAF Product Statuses

Product Status Source CVE Rows
Cisco NX-OS System Software in ACI Mode 13.2(1l) when installed on Cisco Nexus 9000 Series Switches known_affected cisco_csaf CVE-2021-1231 1
Cisco NX-OS System Software in ACI Mode 13.2(1m) when installed on Cisco Nexus 9000 Series Switches known_affected cisco_csaf CVE-2021-1231 1
Cisco NX-OS System Software in ACI Mode 13.2(2l) when installed on Cisco Nexus 9000 Series Switches known_affected cisco_csaf CVE-2021-1231 1
Cisco NX-OS System Software in ACI Mode 13.2(2o) when installed on Cisco Nexus 9000 Series Switches known_affected cisco_csaf CVE-2021-1231 1
Cisco NX-OS System Software in ACI Mode 13.2(3i) when installed on Cisco Nexus 9000 Series Switches known_affected cisco_csaf CVE-2021-1231 1
Cisco NX-OS System Software in ACI Mode 13.2(3j) when installed on Cisco Nexus 9000 Series Switches known_affected cisco_csaf CVE-2021-1231 1
Cisco NX-OS System Software in ACI Mode 13.2(3n) when installed on Cisco Nexus 9000 Series Switches known_affected cisco_csaf CVE-2021-1231 1
Cisco NX-OS System Software in ACI Mode 13.2(3o) when installed on Cisco Nexus 9000 Series Switches known_affected cisco_csaf CVE-2021-1231 1
Cisco NX-OS System Software in ACI Mode 13.2(3r) when installed on Cisco Nexus 9000 Series Switches known_affected cisco_csaf CVE-2021-1231 1
Cisco NX-OS System Software in ACI Mode 13.2(3s) when installed on Cisco Nexus 9000 Series Switches known_affected cisco_csaf CVE-2021-1231 1
Cisco NX-OS System Software in ACI Mode 13.2(41d) when installed on Cisco Nexus 9000 Series Switches known_affected cisco_csaf CVE-2021-1231 1
Cisco NX-OS System Software in ACI Mode 13.2(4d) when installed on Cisco Nexus 9000 Series Switches known_affected cisco_csaf CVE-2021-1231 1

Showing 12 of 57 CSAF status groups; 45 more not shown.

Related Products

Product CVE Evidence
Cisco NX-OS Software CVE-2021-1231 Cisco OpenVuln
Cisco NX-OS System Software in ACI Mode CVE-2021-1231 Cisco OpenVuln
Cisco Nexus 9000 Series Switches CVE-2021-1231 Cisco OpenVuln · family-level