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.

• CVE-2024-20267

A vulnerability has been identified in Cisco FXOS Software and Cisco NX-OS Software related to the Link Layer Discovery Protocol (LLDP). This vulnerability could be exploited by an unauthenticated attacker located nearby the affected device. By sending a specifically crafted LLDP packet to an interface of the device, the attacker can trigger a denial of service (DoS) condition by causing the LLDP service to crash. This crash may lead to the device restarting in certain instances. Exploiting this vulnerability requires direct connectivity to the affected device, either physically or through a Layer 2 Tunnel configured to transport LLDP traffic.

• CVE-2024-20294

A vulnerability in the External Border Gateway Protocol (eBGP) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because eBGP traffic is mapped to a shared hardware rate-limiter queue. An attacker could exploit this vulnerability by sending large amounts of network traffic with certain characteristics through an affected device. A successful exploit could allow the attacker to cause eBGP neighbor sessions to be dropped, leading to a DoS condition in the network.

• CVE-2024-20321