CVE-2024-20446

HIGH EPSS 51.4%

Published Aug 28, 20241y ago · Modified Jun 17, 20261w ago

8.6 CVSS 3.1

High

Published Aug 28, 2024 1y ago

Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score

8.6

Exploitability

3.9

Impact

4.0

Vector string

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

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Changed

Confidentiality None

Integrity None

Availability High

Threat Intelligence

EPSS Exploit Probability

51.4% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

References 1

sec.cloudapps.cisco.com https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-dhcp6-relay-dos-znEAA6xn

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.