high
7.5
CWE
116 20
Advisory Published
Updated

CVE-2019-1968: Cisco NX-OS Software NX-API Denial of Service Vulnerability

First published: Thu Aug 29 2019(Updated: )

A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause an NX-API system process to unexpectedly restart. The vulnerability is due to incorrect validation of the HTTP header of a request that is sent to the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP request to the NX-API on an affected device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition in the NX-API service; however, the NX-OS device itself would still be available and passing network traffic. Note: The NX-API feature is disabled by default.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco NX-OS=7.3
Cisco NX-OS=8.1
Cisco NX-OS=8.2
Cisco NX-OS=8.3
Cisco MDS 9000 Series Multilayer Switches
Cisco MDS 9100
Cisco MDS 9140
Cisco MDS 9200
Cisco MDS 9500
Cisco MDS 9700
Cisco NX-OS=6.1\(2\)i2
Cisco NX-OS=6.1\(2\)i3
Cisco NX-OS=7.0\(3\)i4
Cisco NX-OS=7.0\(3\)i7
Cisco NX-OS=9.2
Cisco Nexus 3016Q Firmware
Cisco Nexus 3048 Firmware
Cisco Nexus 3064 Firmware
Cisco Nexus 3064
Cisco Nexus 31108PC-V Firmware
Cisco Nexus 31108TC-V Firmware
Cisco Nexus 31128PQ
Cisco Nexus 3132C-Z Firmware
Cisco Nexus 3132Q-XL
Cisco Nexus 3132Q-V Firmware
Cisco Nexus 3132Q-XL Firmware
Cisco Nexus 3164Q Firmware
Cisco Nexus 3172 Firmware
Cisco Nexus 3172PQ-XL Firmware
Cisco Nexus 3172TQ Firmware
Cisco Nexus 3172TQ-XL
Cisco Nexus 3172TQ-XL Firmware
Cisco Nexus 3232C
Cisco Nexus 3264C-E Firmware
Cisco Nexus 3264Q Firmware
Cisco Nexus 3408-S Firmware
Cisco Nexus 34180YC Firmware
Cisco Nexus 3432D-S Firmware
Cisco Nexus 3464C Firmware
Cisco NX-OS Nexus 9000 Series
Cisco Nexus 92160YC Switch
Cisco Nexus 92300YC Firmware
Cisco Nexus 92304QC Switch
Cisco Nexus 92348GC-X Switch
Cisco Nexus 9236C Switch
Cisco Nexus 9272Q Switch
Cisco Nexus
Cisco Nexus 93108TC-FX Switch
Cisco Nexus 93120TX Firmware
Cisco Nexus 93128 Firmware
Cisco Nexus 93180LC-EX Switch
Cisco Nexus 93180YC-EX-24
Cisco Nexus 93180YC-FX Firmware
Cisco Nexus 93216TC-FX2 Firmware
Cisco Nexus 93240YC-FX2 Firmware
Cisco Nexus 9332C Firmware
Cisco Nexus 9332PQ Firmware
Cisco Nexus 93360YC-FX2
Cisco Nexus 9336C-FX2 Firmware
Cisco Nexus N9336PQ-X
Cisco Nexus 9348GC-FXP Firmware
Cisco Nexus 9364c-h1
Cisco Nexus 9372PX-E
Cisco Nexus 9372PX-E Firmware
Cisco Nexus 9372TX
Cisco Nexus 9372TX-E Switch
Cisco Nexus 9396PX Firmware
Cisco Nexus 9396TX Firmware
Cisco NX-OS=6.0\(2\)a8
Cisco Nexus 3524-xl
Cisco Nexus 3524-xl
Cisco Nexus 3524-XL Firmware
Cisco Nexus 3548-X/XL Firmware
Cisco Nexus 3548-X/XL
Cisco Nexus 3548-X/XL
Cisco NX-OS=7.0\(3\)f
Cisco Nexus 36180YC-R Firmware
Cisco Nexus 3636C-R Firmware
Cisco Nexus 9504 firmware
Cisco Nexus 9508
Cisco Nexus 9516 firmware
Cisco NX-OS=7.1
Cisco NX-OS=7.2
Cisco Nexus 5548P Firmware
Cisco Nexus 5548UP Firmware
Cisco Nexus 5596T Firmware
Cisco Nexus 5596UP Firmware
Cisco 56128p
Cisco Nexus 5624Q Firmware
Cisco Nexus 5648Q Firmware
Cisco Nexus 5672UP-16G
Cisco Nexus 5696Q Firmware
Cisco Nexus 6001 Firmware
Cisco Nexus 6004 Firmware
Cisco NX-OS=8.0
Cisco Nexus 7000
Cisco Nexus 7000
Cisco Nexus 7000
Cisco Nexus 7000
Cisco Nexus 7000 9-Slot Firmware
Cisco Nexus 7700 series
Cisco Nexus 7700 series
Cisco Nexus 7700 series
Cisco Nexus 7700 series
Cisco Nexus 7700 6-slot

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2019-1968?

    CVE-2019-1968 has been rated as High severity due to its potential for unauthenticated remote system process restarts.

  • How do I fix CVE-2019-1968?

    To fix CVE-2019-1968, upgrade your Cisco NX-OS Software to a version that addresses this vulnerability.

  • Who is affected by CVE-2019-1968?

    Cisco NX-OS versions 6.1, 7.0, 7.1, 7.2, 7.3, 8.0, 8.1, 8.2, and 8.3 are vulnerable to CVE-2019-1968.

  • What vulnerabilities are associated with CVE-2019-1968?

    CVE-2019-1968 is primarily a denial-of-service vulnerability leading to unexpected restarts of NX-API processes.

  • Can CVE-2019-1968 be exploited without authentication?

    Yes, CVE-2019-1968 can be exploited by an unauthenticated remote attacker.

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