What is CVE-2019-1967?

CVE-2019-1967 is a high-severity vulnerability in Cisco Nx-Os Software, classified under CWE-399. CVSS score: 7.5/10. Published 2019-08-30.

How severe is CVE-2019-1967?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Cisco Nx-Os Software

CVE-2019-1967

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.

EPSS: 0.020 (79.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Cisco Nx-os Software — versions unspecified
Cisco Mds_9000
Cisco Mds_9100
Cisco Mds_9140
Cisco Mds_9200
Cisco Mds_9500
Cisco Mds_9700
Cisco Nexus_3016
Cisco Nexus_3048
Cisco Nexus_3064

Weakness classification (CWE)

References

psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2019-1967?: CVE-2019-1967 is a high-severity vulnerability in Cisco Nx-Os Software, classified under CWE-399. CVSS score: 7.5/10. Published 2019-08-30.
How severe is CVE-2019-1967?: High severity. CVSS v3 base score is 7.5 out of 10.