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CVE-2019-1967 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:8.6 HIGHVector:CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-ntp-dos	CVE	Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-ntp-dos	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-400	Uncontrolled Resource Consumption	[email protected]
CWE-399	Resource Management Errors	[email protected]

Affected Products

Product	Versions
cisco nx-os	6.2 7.3 8.1 8.2 8.3
CPE cpe:2.3:o:cisco:nx-os:6.2:::::::* cpe:2.3:o:cisco:nx-os:7.3:::::::* cpe:2.3:o:cisco:nx-os:8.1:::::::* cpe:2.3:o:cisco:nx-os:8.2:::::::* cpe:2.3:o:cisco:nx-os:8.3:::::::* cpe:2.3:o:cisco:nx-os:6.0(2)a8(9.7):::::::* cpe:2.3:o:cisco:nx-os:6.0(2)u6:::::::* cpe:2.3:o:cisco:nx-os:7.0(3)i:::::::* cpe:2.3:o:cisco:nx-os:9.2:::::::* cpe:2.3:o:cisco:nx-os:9.2(1):::::::* cpe:2.3:o:cisco:nx-os:6.0(2)a8:::::::* cpe:2.3:o:cisco:nx-os:7.0(3)i7:::::::* cpe:2.3:o:cisco:nx-os:7.0(3)f:::::::* cpe:2.3:o:cisco:nx-os:7.1(4):::::::* cpe:2.3:o:cisco:nx-os:7.1(4)n1(1):::::::* cpe:2.3:o:cisco:nx-os:7.1(5):::::::* cpe:2.3:o:cisco:nx-os:7.2:::::::* cpe:2.3:o:cisco:nx-os:7.3(2)d1(1):::::::* cpe:2.3:o:cisco:nx-os:8.0:::::::* cpe:2.3:o:cisco:nx-os:8.3(2)s5:::::::* Remediation No remediation found in references.
cisco mds 9000	All versions
CPE cpe:2.3:h:cisco:mds_9000:-:::::::* Remediation No remediation found in references.
cisco mds 9100	All versions
CPE cpe:2.3:h:cisco:mds_9100:-:::::::* Remediation No remediation found in references.
cisco mds 9140	All versions
CPE cpe:2.3:h:cisco:mds_9140:-:::::::* Remediation No remediation found in references.
cisco mds 9200	All versions
CPE cpe:2.3:h:cisco:mds_9200:-:::::::* Remediation No remediation found in references.
cisco mds 9500	All versions
CPE cpe:2.3:h:cisco:mds_9500:-:::::::* Remediation No remediation found in references.
cisco mds 9700	All versions
CPE cpe:2.3:h:cisco:mds_9700:-:::::::* Remediation No remediation found in references.
cisco nexus 3016	All versions
CPE cpe:2.3:h:cisco:nexus_3016:-:::::::* Remediation No remediation found in references.
cisco nexus 3048	All versions
CPE cpe:2.3:h:cisco:nexus_3048:-:::::::* Remediation No remediation found in references.
cisco nexus 3064	All versions
CPE cpe:2.3:h:cisco:nexus_3064:-:::::::* Remediation No remediation found in references.
cisco nexus 3064-t	All versions
CPE cpe:2.3:h:cisco:nexus_3064-t:-:::::::* Remediation No remediation found in references.
cisco nexus 31108pc-v	All versions
CPE cpe:2.3:h:cisco:nexus_31108pc-v:-:::::::* Remediation No remediation found in references.
cisco nexus 31108tc-v	All versions
CPE cpe:2.3:h:cisco:nexus_31108tc-v:-:::::::* Remediation No remediation found in references.
cisco nexus 31128pq	All versions
CPE cpe:2.3:h:cisco:nexus_31128pq:-:::::::* Remediation No remediation found in references.
cisco nexus 3132c-z	All versions
CPE cpe:2.3:h:cisco:nexus_3132c-z:-:::::::* Remediation No remediation found in references.
cisco nexus 3132q	All versions
CPE cpe:2.3:h:cisco:nexus_3132q:-:::::::* Remediation No remediation found in references.
cisco nexus 3132q-v	All versions
CPE cpe:2.3:h:cisco:nexus_3132q-v:-:::::::* Remediation No remediation found in references.
cisco nexus 3132q-xl	All versions
CPE cpe:2.3:h:cisco:nexus_3132q-xl:-:::::::* Remediation No remediation found in references.
cisco nexus 3164q	All versions
CPE cpe:2.3:h:cisco:nexus_3164q:-:::::::* Remediation No remediation found in references.
cisco nexus 3172	All versions
CPE cpe:2.3:h:cisco:nexus_3172:-:::::::* Remediation No remediation found in references.
cisco nexus 3172pq-xl	All versions
CPE cpe:2.3:h:cisco:nexus_3172pq-xl:-:::::::* Remediation No remediation found in references.
cisco nexus 3172tq	All versions
CPE cpe:2.3:h:cisco:nexus_3172tq:-:::::::* Remediation No remediation found in references.
cisco nexus 3172tq-32t	All versions
CPE cpe:2.3:h:cisco:nexus_3172tq-32t:-:::::::* Remediation No remediation found in references.
cisco nexus 3172tq-xl	All versions
CPE cpe:2.3:h:cisco:nexus_3172tq-xl:-:::::::* Remediation No remediation found in references.
cisco nexus 3232c	All versions
CPE cpe:2.3:h:cisco:nexus_3232c:-:::::::* Remediation No remediation found in references.
cisco nexus 3264c-e	All versions
CPE cpe:2.3:h:cisco:nexus_3264c-e:-:::::::* Remediation No remediation found in references.
cisco nexus 3264q	All versions
CPE cpe:2.3:h:cisco:nexus_3264q:-:::::::* Remediation No remediation found in references.
cisco nexus 3408-s	All versions
CPE cpe:2.3:h:cisco:nexus_3408-s:-:::::::* Remediation No remediation found in references.
cisco nexus 34180yc	All versions
CPE cpe:2.3:h:cisco:nexus_34180yc:-:::::::* Remediation No remediation found in references.
cisco nexus 3432d-s	All versions
CPE cpe:2.3:h:cisco:nexus_3432d-s:-:::::::* Remediation No remediation found in references.
cisco nexus 3464c	All versions
CPE cpe:2.3:h:cisco:nexus_3464c:-:::::::* Remediation No remediation found in references.
cisco nexus 9000v	All versions
CPE cpe:2.3:h:cisco:nexus_9000v:-:::::::* Remediation No remediation found in references.
cisco nexus 92160yc-x	All versions
CPE cpe:2.3:h:cisco:nexus_92160yc-x:-:::::::* Remediation No remediation found in references.
cisco nexus 92300yc	All versions
CPE cpe:2.3:h:cisco:nexus_92300yc:-:::::::* Remediation No remediation found in references.
cisco nexus 92304qc	All versions
CPE cpe:2.3:h:cisco:nexus_92304qc:-:::::::* Remediation No remediation found in references.
cisco nexus 92348gc-x	All versions
CPE cpe:2.3:h:cisco:nexus_92348gc-x:-:::::::* Remediation No remediation found in references.
cisco nexus 9236c	All versions
CPE cpe:2.3:h:cisco:nexus_9236c:-:::::::* Remediation No remediation found in references.
cisco nexus 9272q	All versions
CPE cpe:2.3:h:cisco:nexus_9272q:-:::::::* Remediation No remediation found in references.
cisco nexus 93108tc-ex	All versions
CPE cpe:2.3:h:cisco:nexus_93108tc-ex:-:::::::* Remediation No remediation found in references.
cisco nexus 93108tc-fx	All versions
CPE cpe:2.3:h:cisco:nexus_93108tc-fx:-:::::::* Remediation No remediation found in references.
cisco nexus 93120tx	All versions
CPE cpe:2.3:h:cisco:nexus_93120tx:-:::::::* Remediation No remediation found in references.
cisco nexus 93128tx	All versions
CPE cpe:2.3:h:cisco:nexus_93128tx:-:::::::* Remediation No remediation found in references.
cisco nexus 93180lc-ex	All versions
CPE cpe:2.3:h:cisco:nexus_93180lc-ex:-:::::::* Remediation No remediation found in references.
cisco nexus 93180yc-ex	All versions
CPE cpe:2.3:h:cisco:nexus_93180yc-ex:-:::::::* Remediation No remediation found in references.
cisco nexus 93180yc-fx	All versions
CPE cpe:2.3:h:cisco:nexus_93180yc-fx:-:::::::* Remediation No remediation found in references.
cisco nexus 93216tc-fx2	All versions
CPE cpe:2.3:h:cisco:nexus_93216tc-fx2:-:::::::* Remediation No remediation found in references.
cisco nexus 93240yc-fx2	All versions
CPE cpe:2.3:h:cisco:nexus_93240yc-fx2:-:::::::* Remediation No remediation found in references.
cisco nexus 9332c	All versions
CPE cpe:2.3:h:cisco:nexus_9332c:-:::::::* Remediation No remediation found in references.
cisco nexus 9332pq	All versions
CPE cpe:2.3:h:cisco:nexus_9332pq:-:::::::* Remediation No remediation found in references.
cisco nexus 93360yc-fx2	All versions
CPE cpe:2.3:h:cisco:nexus_93360yc-fx2:-:::::::* Remediation No remediation found in references.
cisco nexus 9336c-fx2	All versions
CPE cpe:2.3:h:cisco:nexus_9336c-fx2:-:::::::* Remediation No remediation found in references.
cisco nexus 9336pq aci spine	All versions
CPE cpe:2.3:h:cisco:nexus_9336pq_aci_spine:-:::::::* Remediation No remediation found in references.
cisco nexus 9348gc-fxp	All versions
CPE cpe:2.3:h:cisco:nexus_9348gc-fxp:-:::::::* Remediation No remediation found in references.
cisco nexus 9364c	All versions
CPE cpe:2.3:h:cisco:nexus_9364c:-:::::::* Remediation No remediation found in references.
cisco nexus 9372px	All versions
CPE cpe:2.3:h:cisco:nexus_9372px:-:::::::* Remediation No remediation found in references.
cisco nexus 9372px-e	All versions
CPE cpe:2.3:h:cisco:nexus_9372px-e:-:::::::* Remediation No remediation found in references.
cisco nexus 9372tx	All versions
CPE cpe:2.3:h:cisco:nexus_9372tx:-:::::::* Remediation No remediation found in references.
cisco nexus 9372tx-e	All versions
CPE cpe:2.3:h:cisco:nexus_9372tx-e:-:::::::* Remediation No remediation found in references.
cisco nexus 9396px	All versions
CPE cpe:2.3:h:cisco:nexus_9396px:-:::::::* Remediation No remediation found in references.
cisco nexus 9396tx	All versions
CPE cpe:2.3:h:cisco:nexus_9396tx:-:::::::* Remediation No remediation found in references.
cisco nexus 3524	All versions
CPE cpe:2.3:h:cisco:nexus_3524:-:::::::* Remediation No remediation found in references.
cisco nexus 3524-x	All versions
CPE cpe:2.3:h:cisco:nexus_3524-x:-:::::::* Remediation No remediation found in references.
cisco nexus 3524-xl	All versions
CPE cpe:2.3:h:cisco:nexus_3524-xl:-:::::::* Remediation No remediation found in references.
cisco nexus 3548	All versions
CPE cpe:2.3:h:cisco:nexus_3548:-:::::::* Remediation No remediation found in references.
cisco nexus 3548-x	All versions
CPE cpe:2.3:h:cisco:nexus_3548-x:-:::::::* Remediation No remediation found in references.
cisco nexus 3548-xl	All versions
CPE cpe:2.3:h:cisco:nexus_3548-xl:-:::::::* Remediation No remediation found in references.
cisco nexus 36180yc-r	All versions
CPE cpe:2.3:h:cisco:nexus_36180yc-r:-:::::::* Remediation No remediation found in references.
cisco nexus 3636c-r	All versions
CPE cpe:2.3:h:cisco:nexus_3636c-r:-:::::::* Remediation No remediation found in references.
cisco nexus 9504	All versions
CPE cpe:2.3:h:cisco:nexus_9504:-:::::::* Remediation No remediation found in references.
cisco nexus 9508	All versions
CPE cpe:2.3:h:cisco:nexus_9508:-:::::::* Remediation No remediation found in references.
cisco nexus 9516	All versions
CPE cpe:2.3:h:cisco:nexus_9516:-:::::::* Remediation No remediation found in references.
cisco nexus 5548p	All versions
CPE cpe:2.3:h:cisco:nexus_5548p:-:::::::* Remediation No remediation found in references.
cisco nexus 5548up	All versions
CPE cpe:2.3:h:cisco:nexus_5548up:-:::::::* Remediation No remediation found in references.
cisco nexus 5596t	All versions
CPE cpe:2.3:h:cisco:nexus_5596t:-:::::::* Remediation No remediation found in references.
cisco nexus 5596up	All versions
CPE cpe:2.3:h:cisco:nexus_5596up:-:::::::* Remediation No remediation found in references.
cisco nexus 56128p	All versions
CPE cpe:2.3:h:cisco:nexus_56128p:-:::::::* Remediation No remediation found in references.
cisco nexus 5624q	All versions
CPE cpe:2.3:h:cisco:nexus_5624q:-:::::::* Remediation No remediation found in references.
cisco nexus 5648q	All versions
CPE cpe:2.3:h:cisco:nexus_5648q:-:::::::* Remediation No remediation found in references.
cisco nexus 5672up	All versions
CPE cpe:2.3:h:cisco:nexus_5672up:-:::::::* Remediation No remediation found in references.
cisco nexus 5696q	All versions
CPE cpe:2.3:h:cisco:nexus_5696q:-:::::::* Remediation No remediation found in references.
cisco nexus 6001	All versions
CPE cpe:2.3:h:cisco:nexus_6001:-:::::::* Remediation No remediation found in references.
cisco nexus 6004	All versions
CPE cpe:2.3:h:cisco:nexus_6004:-:::::::* Remediation No remediation found in references.
cisco nexus 7000	All versions
CPE cpe:2.3:h:cisco:nexus_7000:-:::::::* Remediation No remediation found in references.
cisco nexus 7000 10-slot	All versions
CPE cpe:2.3:h:cisco:nexus_7000_10-slot:-:::::::* Remediation No remediation found in references.
cisco nexus 7000 18-slot	All versions
CPE cpe:2.3:h:cisco:nexus_7000_18-slot:-:::::::* Remediation No remediation found in references.
cisco nexus 7000 4-slot	All versions
CPE cpe:2.3:h:cisco:nexus_7000_4-slot:-:::::::* Remediation No remediation found in references.
cisco nexus 7000 9-slot	All versions
CPE cpe:2.3:h:cisco:nexus_7000_9-slot:-:::::::* Remediation No remediation found in references.
cisco nexus 7700	All versions
CPE cpe:2.3:h:cisco:nexus_7700:-:::::::* Remediation No remediation found in references.
cisco nexus 7700 10-slot	All versions
CPE cpe:2.3:h:cisco:nexus_7700_10-slot:-:::::::* Remediation No remediation found in references.
cisco nexus 7700 18-slot	All versions
CPE cpe:2.3:h:cisco:nexus_7700_18-slot:-:::::::* Remediation No remediation found in references.
cisco nexus 7700 2-slot	All versions
CPE cpe:2.3:h:cisco:nexus_7700_2-slot:-:::::::* Remediation No remediation found in references.
cisco nexus 7700 6-slot	All versions
CPE cpe:2.3:h:cisco:nexus_7700_6-slot:-:::::::* Remediation No remediation found in references.

Change History

7 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	CISA-ADP
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Oct 16, 2020	Modified Analysis	[email protected]
Oct 9, 2019	CVE Modified	[email protected]
Sep 5, 2019	Initial Analysis	[email protected]

CVE-2019-1967 Details

Description

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