A vulnerability with the handling of MPLS traffic for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause the netstack process to unexpectedly restart, which could cause the device to stop processing network traffic or to reload. This vulnerability is due to lack of proper error checking when processing an ingress MPLS frame. An attacker could exploit this vulnerability by sending a crafted IPv6 packet that is encapsulated within an MPLS frame to an MPLS-enabled interface of the targeted device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition. Note: The IPv6 packet can be generated multiple hops away from the targeted device and then encapsulated within MPLS. The DoS condition may occur when the NX-OS device processes the packet.

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

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

Cisco NX-OS Software MPLS Encapsulated IPv6 DoS (cisco-sa-ipv6-mpls-dos-R9ycXkwM)

high Nessus Plugin ID 191469

Version 1.1

Version 1.0

Version 1.1 Feb 27, 2025, 2:39 PM IAVM reference Plugin Feed: 202502271439
Version 1.0 Mar 1, 2024, 4:03 PM New Plugin Feed: 202403011603