According to its self-reported version, Cisco NX-OS System Software is affected by a denial of service (DoS) vulnerability. The vulnerability lies in the Link Layer Discovery Protocol (LLDP) feature of Cisco NX-OS Software and could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability is due to improper handling of specific fields in an LLDP frame. An attacker could exploit this vulnerability by sending a crafted LLDP packet to an interface of an affected device and having an authenticated user retrieve LLDP statistics from the affected device through CLI show commands or Simple Network Management Protocol (SNMP) requests. A successful exploit could allow the attacker to cause the LLDP service to crash and stop running on the affected device. In certain situations, the LLDP crash may result in a reload of the affected device. Note: LLDP is a Layer 2 link protocol. To exploit this vulnerability, an attacker would need to be directly connected to an interface of an affected device, either physically or logically (for example, through a Layer 2 Tunnel configured to transport the LLDP protocol).

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Detections

Analytics

Cisco NX-OS Software Link Layer Discovery Protocol DoS (cisco-sa-nxos-lldp-dos-z7PncTgt)

medium Nessus Plugin ID 191647

Version 1.2

Version 1.1

Version 1.0

Version 1.2 Mar 8, 2024, 4:03 PM IAVM reference STIG Severity (set to "I") Plugin Feed: 202403081603
Version 1.1 Mar 7, 2024, 3:19 PM CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:U/RL:OF/RC:C". "CVSSv3 temporal vector" set to "CVSS:3.0/E:U/RL:O/RC:C") Plugin Feed: 202403071519
Version 1.0 Mar 6, 2024, 7:09 PM New Plugin Feed: 202403061909