high
8.6
CWE
20
Advisory Published
Updated

CVE-2019-1962: Cisco NX-OS Software Cisco Fabric Services over IP Denial of Service Vulnerability

First published: Wed Aug 28 2019(Updated: )

A vulnerability in the Cisco Fabric Services component of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause process crashes, which can result in a denial of service (DoS) condition on an affected system. The vulnerability is due to insufficient validation of TCP packets when processed by the Cisco Fabric Services over IP (CFSoIP) feature. An attacker could exploit this vulnerability by sending a malicious Cisco Fabric Services TCP packet to an affected device. A successful exploit could allow the attacker to cause process crashes, resulting in a device reload and a DoS condition. Note: There are three distribution methods that can be configured for Cisco Fabric Services. This vulnerability affects only distribution method CFSoIP, which is disabled by default. See the Details section for more information.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco NX-OS>=5.2<6.2\(29\)
Cisco NX-OS>=7.3<8.1
Cisco MDS 9132T
Cisco MDS 9148S
Cisco MDS 9148T
Cisco MDS 9216
Cisco MDS 9216
Cisco MDS 9216
Cisco MDS 9222i
Cisco MDS 9250i
Cisco MDS 9396S
Cisco MDS 9396T
Cisco MDS 9500
Cisco MDS 9500
Cisco MDS 9513 Firmware
Cisco MDS 9706 Firmware
Cisco MDS 9710 Firmware
Cisco MDS 9718 Firmware
Cisco NX-OS>=7.0\(3\)f<9.2
Cisco Nexus 9500 Series
Cisco Nexus N9K-C9508-FM-R
Cisco x96136yc-r
Cisco Nexus 9636C-R
Cisco Nexus n9k-x9636c-rx
Cisco Nexus N9K-X9636Q-R
Cisco Nexus 36180YC-R Firmware
Cisco Nexus 3636C-R Firmware
Cisco Nexus n9k-x96136yc-r
Cisco x9636c-rx
Cisco Nexus 9636C-RX
Cisco Nexus X9636Q-R
Cisco NX-OS<7.1\(5\)n1\(1b\)
Cisco NX-OS>=7.3<7.3\(5\)n1\(1\)
Cisco Nexus 5010
Cisco Nexus 5020
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 5672UP-16G Firmware
Cisco Nexus 5696Q Firmware
Cisco Nexus 6001 Firmware
Cisco Nexus 6004 Firmware
Cisco NX-OS<6.2\(22\)
Cisco NX-OS>=7.2<7.3\(4\)d1\(1\)
Cisco 7000 10-slot
Cisco Nexus 7000 18-slot
Cisco Nexus 7000 4-slot
Cisco Nexus 7000 9-slot
Cisco 7700
Cisco 7700
Cisco 7700
Cisco 7700
Cisco Nexus 7000 Series Switch - n77-f312ck-26
Cisco Nexus 7000 Series n77-f324fq-25
Cisco Nexus 7700 Series Switch
Cisco Nexus 7700 series
Cisco Nexus 7000 Series N77-M312CQ-26L
Cisco Nexus 7000 Series n7k-m324fq-25l
Cisco Nexus 7000 Series Switch (N77-M348XP-23L)
Cisco Nexus 7000 n7k-f248xp-25e
Cisco Nexus 7000 Series Switch - N7K-F306CK-25
Cisco Nexus 7000 Series Switch
Cisco Nexus 7000 Series Switches
Cisco Nexus 7000 Series N7K-M206FQ-23L
Cisco NEXUS 7000 Series Switch (Model N7K-M224XP-23L)
Cisco Nexus 7000 Series n7k-m324fq-25l
Cisco Nexus 7000 Series N7K-M348XP-25L
Cisco Nexus 7000 Supervisor 1 Firmware
Cisco Nexus 7000 Supervisor 2E
Cisco Nexus 7000 Supervisor 2E Firmware
Cisco Nexus 7700 Supervisor 2E Firmware
Cisco Nexus 7700 Supervisor 3E Firmware
Cisco NX-OS<7.0\(3\)i4\(9\)
Cisco NX-OS>=7.0\(3\)i7<7.0\(3\)i7\(6\)
Cisco Nexus 9000 Series Switches
Cisco Nexus 9000 Series Switches
Cisco Nexus 9000 Series Switches
Cisco Nexus 9000 Series Switch - C93180LC-EX
Cisco Nexus 93180YC-EX
Cisco Nexus 93360YC-FX2
Cisco Nexus 9000 Series Switches n9k-x9732c-ex
Cisco Nexus 9000 Series Switch
Cisco Nexus 3048 Firmware
Cisco NX-OS<6.0\(2\)a8\(11\)
Cisco Nexus 3524-x/xl
Cisco Nexus 3548-x/xl
Cisco NX-OS<3.2\(3i\)
Cisco NX-OS>=4.0<4.0\(2d\)
Cisco UCS 6296UP
Cisco UCS 6248UP
Cisco UCS 6324 firmware
Cisco UCS 6332
Cisco UCS 6332-16UP

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2019-1962?

    CVE-2019-1962 has a severity rating that can lead to denial of service (DoS) on affected Cisco NX-OS systems.

  • How do I fix CVE-2019-1962?

    To address CVE-2019-1962, users should upgrade to a fixed software version as specified in the Cisco security advisory.

  • Which Cisco NX-OS versions are affected by CVE-2019-1962?

    CVE-2019-1962 affects Cisco NX-OS versions from 5.2 up to 6.2(29) and from 7.3 to 8.1.

  • Can CVE-2019-1962 be exploited remotely?

    Yes, CVE-2019-1962 can be exploited by an unauthenticated remote attacker.

  • What component of Cisco NX-OS is impacted by CVE-2019-1962?

    CVE-2019-1962 impacts the Cisco Fabric Services component of Cisco NX-OS Software.

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