CVE-2019-1967

Published: Aug 30, 2019Modified: Nov 21, 2024

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

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.

Affected (20)

Products: Cisco: Nx Os

Cisco

1 product

Nx Os

Configuration A

6 platform

Running on/with	Platform Versions
Cisco Mds 9000	All versions
Cisco Mds 9100	All versions
Cisco Mds 9140	All versions
Cisco Mds 9200	All versions
Cisco Mds 9500	All versions
Cisco Mds 9700	All versions

Configuration B

2 vulnerable · 53 platform

Vulnerable Software	Affected Versions
Cisco Nx Os	Version 6.0(2)u6
Cisco Nx Os	Version 7.0(3)i

Running on/with	Platform Versions
Cisco Nexus 3016	All versions
Cisco Nexus 3048	All versions
Cisco Nexus 3064	All versions
Cisco Nexus 3064 T	All versions
Cisco Nexus 31108pc V	All versions
Cisco Nexus 31108tc V	All versions
Cisco Nexus 31128pq	All versions
Cisco Nexus 3132c Z	All versions
Cisco Nexus 3132q	All versions
Cisco Nexus 3132q V	All versions
Cisco Nexus 3132q Xl	All versions
Cisco Nexus 3164q	All versions
Cisco Nexus 3172	All versions
Cisco Nexus 3172pq Xl	All versions
Cisco Nexus 3172tq	All versions
Cisco Nexus 3172tq 32t	All versions
Cisco Nexus 3172tq Xl	All versions
Cisco Nexus 3232c	All versions
Cisco Nexus 3264c E	All versions
Cisco Nexus 3264q	All versions
Cisco Nexus 3408 S	All versions
Cisco Nexus 34180yc	All versions
Cisco Nexus 3432d S	All versions
Cisco Nexus 3464c	All versions
Cisco Nexus 9000v	All versions
Cisco Nexus 92160yc X	All versions
Cisco Nexus 92300yc	All versions
Cisco Nexus 92304qc	All versions
Cisco Nexus 92348gc X	All versions
Cisco Nexus 9236c	All versions
Cisco Nexus 9272q	All versions
Cisco Nexus 93108tc Ex	All versions
Cisco Nexus 93108tc Fx	All versions
Cisco Nexus 93120tx	All versions
Cisco Nexus 93128tx	All versions
Cisco Nexus 93180lc Ex	All versions
Cisco Nexus 93180yc Ex	All versions
Cisco Nexus 93180yc Fx	All versions
Cisco Nexus 93216tc Fx2	All versions
Cisco Nexus 93240yc Fx2	All versions
Cisco Nexus 9332c	All versions
Cisco Nexus 9332pq	All versions
Cisco Nexus 93360yc Fx2	All versions
Cisco Nexus 9336c Fx2	All versions
Cisco Nexus 9336pq Aci Spine	All versions
Cisco Nexus 9348gc Fxp	All versions
Cisco Nexus 9364c	All versions
Cisco Nexus 9372px	All versions
Cisco Nexus 9372px E	All versions
Cisco Nexus 9372tx	All versions
Cisco Nexus 9372tx E	All versions
Cisco Nexus 9396px	All versions
Cisco Nexus 9396tx	All versions

Configuration C

2 vulnerable · 6 platform

Vulnerable Software	Affected Versions
Cisco Nx Os	Version 6.0(2)a8
Cisco Nx Os	Version 7.0(3)i7

Running on/with	Platform Versions
Cisco Nexus 3524	All versions
Cisco Nexus 3524 X	All versions
Cisco Nexus 3524 Xl	All versions
Cisco Nexus 3548	All versions
Cisco Nexus 3548 X	All versions
Cisco Nexus 3548 Xl	All versions

Configuration D

4 vulnerable · 5 platform

Vulnerable Software	Affected Versions
Cisco Nx Os	Version 6.0(2)a8(9.7)
Cisco Nx Os	Version 7.0(3)f
Cisco Nx Os	Version 9.2
Cisco Nx Os	Version 9.2(1)

Running on/with	Platform Versions
Cisco Nexus 36180yc R	All versions
Cisco Nexus 3636c R	All versions
Cisco Nexus 9504	All versions
Cisco Nexus 9508	All versions
Cisco Nexus 9516	All versions

Configuration E

3 vulnerable · 11 platform

Vulnerable Software	Affected Versions
Cisco Nx Os	Version 7.1(4)
Cisco Nx Os	Version 7.1(4)n1(1)
Cisco Nx Os	Version 7.1(5)

Running on/with	Platform Versions
Cisco Nexus 5548p	All versions
Cisco Nexus 5548up	All versions
Cisco Nexus 5596t	All versions
Cisco Nexus 5596up	All versions
Cisco Nexus 56128p	All versions
Cisco Nexus 5624q	All versions
Cisco Nexus 5648q	All versions
Cisco Nexus 5672up	All versions
Cisco Nexus 5696q	All versions
Cisco Nexus 6001	All versions
Cisco Nexus 6004	All versions

Configuration F

9 vulnerable · 10 platform

Vulnerable Software	Affected Versions
Cisco Nx Os	Version 6.2
Cisco Nx Os	Version 7.2
Cisco Nx Os	Version 7.3
Cisco Nx Os	Version 7.3(2)d1(1)
Cisco Nx Os	Version 8.0
Cisco Nx Os	Version 8.1
Cisco Nx Os	Version 8.2
Cisco Nx Os	Version 8.3
Cisco Nx Os	Version 8.3(2)s5

Running on/with	Platform Versions
Cisco Nexus 7000	All versions
Cisco Nexus 7000 10 Slot	All versions
Cisco Nexus 7000 18 Slot	All versions
Cisco Nexus 7000 4 Slot	All versions
Cisco Nexus 7000 9 Slot	All versions
Cisco Nexus 7700	All versions
Cisco Nexus 7700 10 Slot	All versions
Cisco Nexus 7700 18 Slot	All versions
Cisco Nexus 7700 2 Slot	All versions
Cisco Nexus 7700 6 Slot	All versions

Related CWEs

CWE-399

CWE-400

Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

References (2)

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-ntp-dos

Source: psirt@cisco.com

Vendor Advisory

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-ntp-dos

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.