Vulnerability Monitor

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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.

Published

2019-08-30T09:15:20.287

Last Modified

2024-11-21T04:37:47.367

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: COMPLETE
Exploitability Score

10.0

Impact Score

6.9

Weaknesses
  • Type: Secondary
    CWE-399
  • Type: Primary
    CWE-400
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco nx-os 6.2 Yes
Operating System cisco nx-os 7.3 Yes
Operating System cisco nx-os 8.1 Yes
Operating System cisco nx-os 8.2 Yes
Operating System cisco nx-os 8.3 Yes
Hardware cisco mds_9000 - No
Hardware cisco mds_9100 - No
Hardware cisco mds_9140 - No
Hardware cisco mds_9200 - No
Hardware cisco mds_9500 - No
Hardware cisco mds_9700 - No
Operating System cisco nx-os 6.0\(2\)a8\(9.7\) Yes
Operating System cisco nx-os 6.0\(2\)u6 Yes
Operating System cisco nx-os 7.0\(3\)i Yes
Operating System cisco nx-os 9.2 Yes
Operating System cisco nx-os 9.2\(1\) Yes
Hardware cisco nexus_3016 - No
Hardware cisco nexus_3048 - No
Hardware cisco nexus_3064 - No
Hardware cisco nexus_3064-t - No
Hardware cisco nexus_31108pc-v - No
Hardware cisco nexus_31108tc-v - No
Hardware cisco nexus_31128pq - No
Hardware cisco nexus_3132c-z - No
Hardware cisco nexus_3132q - No
Hardware cisco nexus_3132q-v - No
Hardware cisco nexus_3132q-xl - No
Hardware cisco nexus_3164q - No
Hardware cisco nexus_3172 - No
Hardware cisco nexus_3172pq-xl - No
Hardware cisco nexus_3172tq - No
Hardware cisco nexus_3172tq-32t - No
Hardware cisco nexus_3172tq-xl - No
Hardware cisco nexus_3232c - No
Hardware cisco nexus_3264c-e - No
Hardware cisco nexus_3264q - No
Hardware cisco nexus_3408-s - No
Hardware cisco nexus_34180yc - No
Hardware cisco nexus_3432d-s - No
Hardware cisco nexus_3464c - No
Hardware cisco nexus_9000v - No
Hardware cisco nexus_92160yc-x - No
Hardware cisco nexus_92300yc - No
Hardware cisco nexus_92304qc - No
Hardware cisco nexus_92348gc-x - No
Hardware cisco nexus_9236c - No
Hardware cisco nexus_9272q - No
Hardware cisco nexus_93108tc-ex - No
Hardware cisco nexus_93108tc-fx - No
Hardware cisco nexus_93120tx - No
Hardware cisco nexus_93128tx - No
Hardware cisco nexus_93180lc-ex - No
Hardware cisco nexus_93180yc-ex - No
Hardware cisco nexus_93180yc-fx - No
Hardware cisco nexus_93216tc-fx2 - No
Hardware cisco nexus_93240yc-fx2 - No
Hardware cisco nexus_9332c - No
Hardware cisco nexus_9332pq - No
Hardware cisco nexus_93360yc-fx2 - No
Hardware cisco nexus_9336c-fx2 - No
Hardware cisco nexus_9336pq_aci_spine - No
Hardware cisco nexus_9348gc-fxp - No
Hardware cisco nexus_9364c - No
Hardware cisco nexus_9372px - No
Hardware cisco nexus_9372px-e - No
Hardware cisco nexus_9372tx - No
Hardware cisco nexus_9372tx-e - No
Hardware cisco nexus_9396px - No
Hardware cisco nexus_9396tx - No
Operating System cisco nx-os 6.0\(2\)a8 Yes
Operating System cisco nx-os 6.0\(2\)a8\(9.7\) Yes
Operating System cisco nx-os 7.0\(3\)i7 Yes
Operating System cisco nx-os 9.2 Yes
Hardware cisco nexus_3524 - No
Hardware cisco nexus_3524-x - No
Hardware cisco nexus_3524-xl - No
Hardware cisco nexus_3548 - No
Hardware cisco nexus_3548-x - No
Hardware cisco nexus_3548-xl - No
Operating System cisco nx-os 6.0\(2\)a8\(9.7\) Yes
Operating System cisco nx-os 7.0\(3\)f Yes
Operating System cisco nx-os 9.2 Yes
Operating System cisco nx-os 9.2\(1\) Yes
Hardware cisco nexus_36180yc-r - No
Hardware cisco nexus_3636c-r - No
Hardware cisco nexus_9504 - No
Hardware cisco nexus_9508 - No
Hardware cisco nexus_9516 - No
Operating System cisco nx-os 7.1\(4\) Yes
Operating System cisco nx-os 7.1\(4\)n1\(1\) Yes
Operating System cisco nx-os 7.1\(5\) Yes
Operating System cisco nx-os 7.2 Yes
Operating System cisco nx-os 7.3 Yes
Hardware cisco nexus_5548p - No
Hardware cisco nexus_5548up - No
Hardware cisco nexus_5596t - No
Hardware cisco nexus_5596up - No
Hardware cisco nexus_56128p - No
Hardware cisco nexus_5624q - No
Hardware cisco nexus_5648q - No
Hardware cisco nexus_5672up - No
Hardware cisco nexus_5696q - No
Hardware cisco nexus_6001 - No
Hardware cisco nexus_6004 - No
Operating System cisco nx-os 6.2 Yes
Operating System cisco nx-os 7.2 Yes
Operating System cisco nx-os 7.3 Yes
Operating System cisco nx-os 7.3\(2\)d1\(1\) Yes
Operating System cisco nx-os 8.0 Yes
Operating System cisco nx-os 8.1 Yes
Operating System cisco nx-os 8.2 Yes
Operating System cisco nx-os 8.3 Yes
Operating System cisco nx-os 8.3\(2\)s5 Yes
Hardware cisco nexus_7000 - No
Hardware cisco nexus_7000_10-slot - No
Hardware cisco nexus_7000_18-slot - No
Hardware cisco nexus_7000_4-slot - No
Hardware cisco nexus_7000_9-slot - No
Hardware cisco nexus_7700 - No
Hardware cisco nexus_7700_10-slot - No
Hardware cisco nexus_7700_18-slot - No
Hardware cisco nexus_7700_2-slot - No
Hardware cisco nexus_7700_6-slot - No
References