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Cisco Bug: CSCuj45281 - Crafted LLDP packet causes an interface to go error-disable

Last Modified

Feb 22, 2018

Products (3)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch

Known Affected Releases


Description (partial)

A vulnerability in the Link Layer Discovery Protocol (LLDP) code of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause the switch port on which the packet is received to stop forwarding traffic.

The vulnerability is due to an error in processing a malformed LLDP packet. An attacker could exploit this vulnerability by sending a specially crafted, malformed LLDP packet to an interface enabled for LLDP packet processing. Other ports on the switch are not affected.

LLDP is enabled on the interface on which the malformed packet is received.
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