Input validation error in Cisco NX-OS - CVE-2019-1964
Published: August 30, 2019
Vulnerability identifier: #VU20489
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-1964
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause an unexpected restart of the netstack process on an affected device.
The vulnerability exists due to improper validation of IPv6 traffic sent through an affected device. A remote attacker can send a malformed IPv6 packet through an affected device, cause a denial of service (DoS) condition while the netstack process restarts. A sustained attack could lead to a reboot of the device.
This vulnerability affects the following products that are running a Cisco NX-OS Software:
- Nexus 7000 Series Switches
- Nexus 7700 Series Switches
Affected software
Cisco NX-OS
How to mitigate CVE-2019-1964
Install update from vendor's website.
Cisco NX-OS - addressed in versions 8.2.3, 8.3.2, 8.4.1