Rapid7 Vulnerability & Exploit Database

Cisco NX-OS: Cisco NX-OS Software Network Time Protocol Denial of Service Vulnerability (CVE-2019-1967)

Free InsightVM Trial No Credit Card Necessary
Watch Demo See how it all works
Back to Search

Cisco NX-OS: Cisco NX-OS Software Network Time Protocol Denial of Service Vulnerability (CVE-2019-1967)

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
08/28/2019
Created
08/30/2019
Added
08/29/2019
Modified
09/09/2019

Description

A vulnerability in the Network Time Protocol (NTP) feature 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 excessive use of system resources when the affected device is logging a drop action for received MODE_PRIVATE (Mode 7) NTP packets. An attacker could exploit this vulnerability by flooding the device with a steady stream of Mode 7 NTP packets. A successful exploit could allow the attacker to cause high CPU and memory usage on the affected device, which could cause internal system processes to restart or cause the affected device to unexpectedly reload. Note: The NTP feature is enabled by default.

Solution(s)

  • update-nxos

References

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;