CVE-2024-20446CWE-476

Cisco NX-OS Software DHCPv6 Relay Agent Denial of Service Vulnerability

High · published August 28, 2024

CVSS v3.1
8.6
EPSS
1%
Percentile
55.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.6 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00784 · 55.6th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2024-08-28T16:31Z
EPSS history
Timeline
  • 28 AUG 16:31Z
    Cisco NX-OS Software DHCPv6 Relay Agent Denial of Service Vulnerability
    cvelistv5