CVE-2024-20446

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

State: Published
Severity: 8.6 High
Published: Aug 28, 2024
Updated: Aug 28, 2024
Reserved: Nov 8, 2023

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.6 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	cisco

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
Cisco NX-OS SoftwareCisco	10.2(1)Affected 10.2(1q)Affected 9.3(9)Affected 8.2(11)Affected

References

cisco-sa-nxos-dhcp6-relay-dos-znEAA6xn

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