CVE-2020-3338 HIGH

CVE-2020-3338: Cisco NX-OS Software IPv6 Protocol Independent Multicast Denial of Service Vulnerability

Vendor Cisco
Product Cisco NX-OS Software 5.2(1)
Weakness CWE-404
Published August 27, 2020
Last update November 13, 2024

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

A vulnerability in the Protocol Independent Multicast (PIM) feature for IPv6 networks (PIM6) of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper error handling when processing inbound PIM6 packets. An attacker could exploit this vulnerability by sending multiple crafted PIM6 packets to an affected device. A successful exploit could allow the attacker to cause the PIM6 application to leak system memory. Over time, this memory leak could cause the PIM6 application to stop processing legitimate PIM6 traffic, leading to a DoS condition on the affected device.

Key dates

02Disclosure timeline

August 27, 2020 CVE published
November 13, 2024 Record updated