Cisco NX-OS Software Network Time Protocol Denial of Service Vulnerability
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. Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-ntp-dos ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-ntp-dos"]
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2019-1967US | high7.5 | — | ||
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 a… | ||||
references
External citations — patches, advisories, analysis.
- Cisco Nexus 1000V for VMware Switchexternal
- Cisco Nexus 3000 Series and 3500 Series Switchesexternal
- Cisco Nexus 5000 Series Switchesexternal
- Cisco Nexus 5500 Platform Switchesexternal
- Cisco Nexus 6000 Series Switchesexternal
- Cisco Nexus 9000 Series Switchesexternal
- Cisco Nexus 7000 Series Switchesexternal
- CSCvm35740external
remediations (112)
- FixedCisco NX-OS Software 6.0(2)A8(1) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 6.0(2)A8(10) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 6.0(2)A8(10a) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 6.0(2)A8(2) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 6.0(2)A8(3) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 6.0(2)A8(4) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 6.0(2)A8(4a) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 6.0(2)A8(5) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 6.0(2)A8(6) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 6.0(2)A8(7) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 6.0(2)A8(7a) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 6.0(2)A8(7b) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 6.0(2)A8(8) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 6.0(2)A8(9) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(1) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(1) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(2) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(3) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(3) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(3a) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(3a) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(3c) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(3c) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(4) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(4) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(5) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(5) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(1) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(1) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(1t) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(1t) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(2) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(2) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(3) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(3) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(4) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(4) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(5) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(5) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(6) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(6) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(6t) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(6t) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(7) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(7) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(8) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(8) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(8a) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(8a) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(8b) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(8b) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(8z) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(8z) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(9) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I4(9) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I5(1) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I5(1) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I5(2) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I5(2) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I5(3) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I5(3) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I5(3a) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I5(3a) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I5(3b) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I5(3b) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I6(1) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I6(1) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I6(2) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I6(2) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I7(1) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I7(1) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I7(2) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I7(2) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I7(3) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I7(3) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I7(3z) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I7(3z) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I7(4) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I7(4) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I7(5) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I7(5) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I7(5a) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)I7(5a) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)IA7(1) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)IA7(2) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)IM7(2) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.3(0)D1(1) when installed on Cisco MDS 9000 Multilayer Directors and Fabric Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.3(0)D1(1) when installed on Cisco Nexus 7000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.3(0)DX(1) when installed on Cisco Nexus 7000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.3(0)DY(1) when installed on Cisco MDS 9000 Multilayer Directors and Fabric Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.3(1)D1(1) when installed on Cisco MDS 9000 Multilayer Directors and Fabric Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.3(1)D1(1) when installed on Cisco Nexus 7000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.3(1)DY(1) when installed on Cisco MDS 9000 Multilayer Directors and Fabric Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.3(2)D1(1) when installed on Cisco Nexus 7000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.3(2)D1(1d) when installed on Cisco Nexus 7000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.3(2)D1(2) when installed on Cisco Nexus 7000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.3(2)D1(3) when installed on Cisco Nexus 7000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.3(2)D1(3a) when installed on Cisco Nexus 7000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 8.1(1) when installed on Cisco MDS 9000 Multilayer Directors and Fabric Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 8.1(1) when installed on Cisco Nexus 7000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 8.1(1a) when installed on Cisco MDS 9000 Multilayer Directors and Fabric Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 8.1(1b) when installed on Cisco MDS 9000 Multilayer Directors and Fabric Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 8.1(2) when installed on Cisco Nexus 7000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 8.1(2a) when installed on Cisco Nexus 7000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 8.2(1) when installed on Cisco MDS 9000 Multilayer Directors and Fabric Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 8.2(1) when installed on Cisco Nexus 7000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 8.2(2) when installed on Cisco MDS 9000 Multilayer Directors and Fabric Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 8.2(2) when installed on Cisco Nexus 7000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 8.3(1) when installed on Cisco MDS 9000 Multilayer Directors and Fabric Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 8.3(1) when installed on Cisco Nexus 7000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.2(1) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.2(1) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
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