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Cisco NX-OS Software Crafted DHCPv4 Packet Denial of Service Vulnerability

Information

Severity

Severity

High

Family

Family

CISCO

CVSSv2 Base

CVSSv2 Base

7.8

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

5 years ago

Modified

Modified

3 years ago

Summary

A vulnerability in the implementation of the DHCPv4 relay agent and smart relay agent in Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

Insight

Insight

The vulnerability is due to improper validation of crafted DHCPv4 offer packets. An attacker could exploit this vulnerability by sending crafted DHCPv4 offer packets to an affected device. This vulnerability can be exploited using IPv4 packets only. The vulnerability can be triggered by crafted DHCP packets processed by a DHCP relay agent or smart relay agent listening on the device using the IPv4 broadcast address or the IPv4 unicast address of any interface configured on a device.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

See the referenced vendor advisory for a solution.

Common Vulnerabilities and Exposures (CVE)