CVE-2024-20446 HIGH

CVE-2024-20446: Cisco NX-OS Software DHCPv6 Relay Agent Denial of Service Vulnerability

Vendor Cisco
Product Cisco NX-OS Software
Weakness CWE-476
Published August 28, 2024
Last update August 28, 2024
View on NVD All CVEs

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

What the vulnerability does

01Description

A vulnerability in the DHCPv6 relay agent 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 is due to improper handling of specific fields in a DHCPv6 RELAY-REPLY message. An attacker could exploit this vulnerability by sending a crafted DHCPv6 packet to any IPv6 address that is configured on an affected device. A successful exploit could allow the attacker to cause the dhcp_snoop process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition.

Key dates

02Disclosure timeline

August 28, 2024 CVE published
August 28, 2024 Record updated