Cisco Nexus 9000 Series Fabric Switches ACI Mode Link Layer Discovery Protocol Port Denial of Service Vulnerability
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.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2021-1231US | medium4.7 | — | ||
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, a… | ||||
references
External citations — patches, advisories, analysis.
- Cisco Nexus 1000V for VMware Switchexternal
- Cisco Nexus 3000 Series Switchesexternal
- Cisco Nexus 5500 Platform Switchesexternal
- Cisco Nexus 6000 Series Switchesexternal
- Cisco Nexus 9000 Series Switchesexternal
- Cisco Nexus 7000 Series Switchesexternal
- Cisco Nexus 9000 Series Fabric Switches ACI Mode Link Layer Discovery Protocol Port Denial of Service Vulnerabilityself
- Cisco Security Vulnerability Policyexternal
remediations (57)
- FixedCisco NX-OS System Software in ACI Mode 13.2(1l) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(1m) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(2l) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(2o) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(3i) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(3j) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(3n) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(3o) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(3r) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(3s) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(4e) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(5d) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(5e) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
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Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(7f) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(7k) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(8d) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(9b) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(9f) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 13.2(9h) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.0(1h) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.0(2c) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.0(3c) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.0(3d) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.1(1i) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.1(1j) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.1(1k) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.1(1l) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.1(2g) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.1(2m) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.1(2o) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.1(2s) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.1(2u) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.1(2w) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.1(2x) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(1i) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(1j) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(1l) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(2e) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(2f) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(2g) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(3j) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(3l) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(3n) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(3q) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(4i) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(4k) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(4o) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(4p) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 14.2(5k) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 15.0(1k) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 15.0(1l) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 15.0(2e) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS System Software in ACI Mode 15.0(2h) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
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