PT-2019-3280 · Cisco · Cisco Nx-Os+1

Published 2019-08-28 · Updated 2019-10-09 · CVE-2019-1964

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Cisco NX-OS Software (affected versions not specified)

Description A vulnerability in the IPv6 traffic processing of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause an unexpected restart of the netstack process on an affected device. The vulnerability is due to improper validation of IPv6 traffic sent through an affected device. An attacker could exploit this vulnerability by sending a malformed IPv6 packet through an affected device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition while the netstack process restarts. A sustained attack could lead to a reboot of the device.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2019-03303

CVE-2019-1964

Affected Products

Cisco Nx-Os

Cisco Nexus

References · 4

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-ipv6-dos · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-1964 · Security Note
• https://osv.dev/vulnerability/CVE-2019-1964 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-03303 · Security Note