8.6
CWE
476
Advisory Published
Updated

CVE-2020-3517: Cisco FXOS and NX-OS Software Cisco Fabric Services Denial of Service Vulnerability

First published: Thu Aug 27 2020(Updated: )

A vulnerability in the Cisco Fabric Services component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated attacker to cause process crashes, which could result in a denial of service (DoS) condition on an affected device. The attack vector is configuration dependent and could be remote or adjacent. For more information about the attack vector, see the Details section of this advisory. The vulnerability is due to insufficient error handling when the affected software parses Cisco Fabric Services messages. An attacker could exploit this vulnerability by sending malicious Cisco Fabric Services messages to an affected device. A successful exploit could allow the attacker to cause a reload of an affected device, which could result in a DoS condition.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Firepower Extensible Operating System>=1.1<1.1.4.179
Cisco Firepower Extensible Operating System>=2.0<2.0.1.153
Cisco Firepower Extensible Operating System>=2.1<2.1.1.86
Cisco Firepower Extensible Operating System>=2.2<2.2.1.70
Cisco Firepower 4110 Next-Generation Firewall
Cisco Firepower 4112 Firmware
Cisco Firepower 4115
Cisco Firepower 4120 Next-Generation Firewall
Cisco Firepower 4125 firmware
Cisco Firepower 4140 Next-Generation Firewall
Cisco Firepower 4145 firmware
Cisco Firepower 4150 Next-Generation Firewall
Cisco Firepower 9300 firmware
Cisco NX-OS=6.0\(2\)a3\(1\)
Cisco NX-OS=6.0\(2\)a3\(2\)
Cisco NX-OS=6.0\(2\)a3\(4\)
Cisco NX-OS=6.0\(2\)a4\(1\)
Cisco NX-OS=6.0\(2\)a4\(2\)
Cisco NX-OS=6.0\(2\)a4\(3\)
Cisco NX-OS=6.0\(2\)a4\(4\)
Cisco NX-OS=6.0\(2\)a4\(5\)
Cisco NX-OS=6.0\(2\)a4\(6\)
Cisco NX-OS=6.0\(2\)a6\(1\)
Cisco NX-OS=6.0\(2\)a6\(1a\)
Cisco NX-OS=6.0\(2\)a6\(2\)
Cisco NX-OS=6.0\(2\)a6\(2a\)
Cisco NX-OS=6.0\(2\)a6\(3\)
Cisco NX-OS=6.0\(2\)a6\(3a\)
Cisco NX-OS=6.0\(2\)a6\(4\)
Cisco NX-OS=6.0\(2\)a6\(4a\)
Cisco NX-OS=6.0\(2\)a6\(5\)
Cisco NX-OS=6.0\(2\)a6\(5a\)
Cisco NX-OS=6.0\(2\)a6\(5b\)
Cisco NX-OS=6.0\(2\)a6\(6\)
Cisco NX-OS=6.0\(2\)a6\(7\)
Cisco NX-OS=6.0\(2\)a6\(8\)
Cisco NX-OS=6.0\(2\)a7\(1\)
Cisco NX-OS=6.0\(2\)a7\(1a\)
Cisco NX-OS=6.0\(2\)a7\(2\)
Cisco NX-OS=6.0\(2\)a7\(2a\)
Cisco NX-OS=6.0\(2\)a8
Cisco NX-OS=6.0\(2\)a8\(1\)
Cisco NX-OS=6.0\(2\)a8\(2\)
Cisco NX-OS=6.0\(2\)a8\(3\)
Cisco NX-OS=6.0\(2\)a8\(4\)
Cisco NX-OS=6.0\(2\)a8\(4a\)
Cisco NX-OS=6.0\(2\)a8\(5\)
Cisco NX-OS=6.0\(2\)a8\(6\)
Cisco NX-OS=6.0\(2\)a8\(6.213\)
Cisco NX-OS=6.0\(2\)a8\(7\)
Cisco NX-OS=6.0\(2\)a8\(7a\)
Cisco NX-OS=6.0\(2\)a8\(7b\)
Cisco NX-OS=6.0\(2\)a8\(8\)
Cisco NX-OS=6.0\(2\)a8\(9\)
Cisco NX-OS=6.0\(2\)a8\(9.7\)
Cisco NX-OS=6.0\(2\)a8\(10\)
Cisco NX-OS=6.0\(2\)a8\(10a\)
Cisco NX-OS=6.0\(2\)a8\(11\)
Cisco NX-OS=6.0\(2\)a8\(11a\)
Cisco NX-OS=6.0\(2\)a8\(11b\)
Cisco NX-OS=6.0\(2\)u2\(1\)
Cisco NX-OS=6.0\(2\)u2\(2\)
Cisco NX-OS=6.0\(2\)u2\(3\)
Cisco NX-OS=6.0\(2\)u2\(4\)
Cisco NX-OS=6.0\(2\)u2\(5\)
Cisco NX-OS=6.0\(2\)u2\(6\)
Cisco NX-OS=6.0\(2\)u3\(1\)
Cisco NX-OS=6.0\(2\)u3\(2\)
Cisco NX-OS=6.0\(2\)u3\(3\)
Cisco NX-OS=6.0\(2\)u3\(4\)
Cisco NX-OS=6.0\(2\)u3\(5\)
Cisco NX-OS=6.0\(2\)u3\(6\)
Cisco NX-OS=6.0\(2\)u3\(7\)
Cisco NX-OS=6.0\(2\)u3\(8\)
Cisco NX-OS=6.0\(2\)u3\(9\)
Cisco NX-OS=6.0\(2\)u4\(1\)
Cisco NX-OS=6.0\(2\)u4\(2\)
Cisco NX-OS=6.0\(2\)u4\(3\)
Cisco NX-OS=6.0\(2\)u4\(4\)
Cisco NX-OS=6.0\(2\)u5\(1\)
Cisco NX-OS=6.0\(2\)u5\(2\)
Cisco NX-OS=6.0\(2\)u5\(3\)
Cisco NX-OS=6.0\(2\)u5\(4\)
Cisco NX-OS=6.0\(2\)u6
Cisco NX-OS=6.0\(2\)u6\(0.46\)
Cisco NX-OS=6.0\(2\)u6\(1\)
Cisco NX-OS=6.0\(2\)u6\(1a\)
Cisco NX-OS=6.0\(2\)u6\(2\)
Cisco NX-OS=6.0\(2\)u6\(2a\)
Cisco NX-OS=6.0\(2\)u6\(3\)
Cisco NX-OS=6.0\(2\)u6\(3a\)
Cisco NX-OS=6.0\(2\)u6\(4\)
Cisco NX-OS=6.0\(2\)u6\(4a\)
Cisco NX-OS=6.0\(2\)u6\(5\)
Cisco NX-OS=6.0\(2\)u6\(5a\)
Cisco NX-OS=6.0\(2\)u6\(5b\)
Cisco NX-OS=6.0\(2\)u6\(5c\)
Cisco NX-OS=6.0\(2\)u6\(6\)
Cisco NX-OS=6.0\(2\)u6\(7\)
Cisco NX-OS=6.0\(2\)u6\(8\)
Cisco NX-OS=6.0\(2\)u6\(9\)
Cisco NX-OS=6.0\(2\)u6\(10\)
Cisco NX-OS=6.0\(2\)u6\(10a\)
Cisco NX-OS=6.2\(2\)
Cisco NX-OS=6.2\(2a\)
Cisco NX-OS=6.2\(3\)
Cisco NX-OS=6.2\(3n\)
Cisco NX-OS=6.2\(5\)
Cisco NX-OS=6.2\(5a\)
Cisco NX-OS=6.2\(6\)
Cisco NX-OS=6.2\(6a\)
Cisco NX-OS=6.2\(6b\)
Cisco NX-OS=6.2\(7\)
Cisco NX-OS=6.2\(8\)
Cisco NX-OS=6.2\(8a\)
Cisco NX-OS=6.2\(8b\)
Cisco NX-OS=6.2\(10\)
Cisco NX-OS=6.2\(11b\)
Cisco NX-OS=6.2\(12\)
Cisco NX-OS=6.2\(14\)
Cisco NX-OS=6.2\(14a\)
Cisco NX-OS=6.2\(14b\)
Cisco NX-OS=6.2\(16\)
Cisco NX-OS=6.2\(18\)
Cisco NX-OS=6.2\(20\)
Cisco NX-OS=6.2\(20a\)
Cisco NX-OS=6.2\(22\)
Cisco NX-OS=6.2\(24\)
Cisco NX-OS=6.2\(25\)
Cisco NX-OS=6.2\(27\)
Cisco NX-OS=7.0\(0\)n1\(1\)
Cisco NX-OS=7.0\(1\)n1\(1\)
Cisco NX-OS=7.0\(2\)n1\(1\)
Cisco NX-OS=7.0\(3\)f1
Cisco NX-OS=7.0\(3\)f2
Cisco NX-OS=7.0\(3\)f3
Cisco NX-OS=7.0\(3\)f3\(1\)
Cisco NX-OS=7.0\(3\)f3\(2\)
Cisco NX-OS=7.0\(3\)f3\(3\)
Cisco NX-OS=7.0\(3\)f3\(3a\)
Cisco NX-OS=7.0\(3\)f3\(3b\)
Cisco NX-OS=7.0\(3\)f3\(3c\)
Cisco NX-OS=7.0\(3\)f3\(4\)
Cisco NX-OS=7.0\(3\)f3\(5\)
Cisco NX-OS=7.0\(3\)i2\(1\)
Cisco NX-OS=7.0\(3\)i2\(1a\)
Cisco NX-OS=7.0\(3\)i2\(2\)
Cisco NX-OS=7.0\(3\)i2\(2a\)
Cisco NX-OS=7.0\(3\)i2\(2b\)
Cisco NX-OS=7.0\(3\)i2\(2c\)
Cisco NX-OS=7.0\(3\)i2\(2d\)
Cisco NX-OS=7.0\(3\)i2\(2e\)
Cisco NX-OS=7.0\(3\)i2\(2r\)
Cisco NX-OS=7.0\(3\)i2\(2s\)
Cisco NX-OS=7.0\(3\)i2\(2v\)
Cisco NX-OS=7.0\(3\)i2\(2w\)
Cisco NX-OS=7.0\(3\)i2\(2x\)
Cisco NX-OS=7.0\(3\)i2\(2y\)
Cisco NX-OS=7.0\(3\)i3\(1\)
Cisco NX-OS=7.0\(3\)i4\(1\)
Cisco NX-OS=7.0\(3\)i4\(1t\)
Cisco NX-OS=7.0\(3\)i4\(2\)
Cisco NX-OS=7.0\(3\)i4\(3\)
Cisco NX-OS=7.0\(3\)i4\(4\)
Cisco NX-OS=7.0\(3\)i4\(5\)
Cisco NX-OS=7.0\(3\)i4\(6\)
Cisco NX-OS=7.0\(3\)i4\(6t\)
Cisco NX-OS=7.0\(3\)i4\(7\)
Cisco NX-OS=7.0\(3\)i4\(8\)
Cisco NX-OS=7.0\(3\)i4\(8a\)
Cisco NX-OS=7.0\(3\)i4\(8b\)
Cisco NX-OS=7.0\(3\)i4\(8z\)
Cisco NX-OS=7.0\(3\)i4\(9\)
Cisco NX-OS=7.0\(3\)i5
Cisco NX-OS=7.0\(3\)i5\(1\)
Cisco NX-OS=7.0\(3\)i5\(2\)
Cisco NX-OS=7.0\(3\)i5\(3\)
Cisco NX-OS=7.0\(3\)i5\(3a\)
Cisco NX-OS=7.0\(3\)i5\(3b\)
Cisco NX-OS=7.0\(3\)i6\(1\)
Cisco NX-OS=7.0\(3\)i6\(2\)
Cisco NX-OS=7.0\(3\)i7
Cisco NX-OS=7.0\(3\)i7\(1\)
Cisco NX-OS=7.0\(3\)i7\(2\)
Cisco NX-OS=7.0\(3\)i7\(3\)
Cisco NX-OS=7.0\(3\)i7\(3z\)
Cisco NX-OS=7.0\(3\)i7\(4\)
Cisco NX-OS=7.0\(3\)i7\(5\)
Cisco NX-OS=7.0\(3\)i7\(5a\)
Cisco NX-OS=7.0\(3\)i7\(6\)
Cisco NX-OS=7.0\(3\)i7\(6z\)
Cisco NX-OS=7.0\(3\)i7\(7\)
Cisco NX-OS=7.0\(3\)i7\(8\)
Cisco NX-OS=7.0\(3\)ia7\(1\)
Cisco NX-OS=7.0\(3\)ia7\(2\)
Cisco NX-OS=7.0\(3\)ic4\(4\)
Cisco NX-OS=7.0\(3\)im3\(1\)
Cisco NX-OS=7.0\(3\)im3\(2\)
Cisco NX-OS=7.0\(3\)im3\(2a\)
Cisco NX-OS=7.0\(3\)im3\(2b\)
Cisco NX-OS=7.0\(3\)im3\(3\)
Cisco NX-OS=7.0\(3\)im7\(2\)
Cisco NX-OS=7.0\(3\)n1\(1\)
Cisco NX-OS=7.0\(4\)n1\(1\)
Cisco NX-OS=7.0\(4\)n1\(1a\)
Cisco NX-OS=7.0\(5\)n1\(1\)
Cisco NX-OS=7.0\(5\)n1\(1a\)
Cisco NX-OS=7.0\(6\)n1\(1\)
Cisco NX-OS=7.0\(6\)n1\(2s\)
Cisco NX-OS=7.0\(6\)n1\(3s\)
Cisco NX-OS=7.0\(6\)n1\(4s\)
Cisco NX-OS=7.0\(7\)n1\(1\)
Cisco NX-OS=7.0\(7\)n1\(1a\)
Cisco NX-OS=7.0\(7\)n1\(1b\)
Cisco NX-OS=7.0\(8\)n1\(1\)
Cisco NX-OS=7.0\(8\)n1\(1a\)
Cisco NX-OS=7.1\(0\)n1\(1\)
Cisco NX-OS=7.1\(0\)n1\(1a\)
Cisco NX-OS=7.1\(0\)n1\(1b\)
Cisco NX-OS=7.1\(0.1\)
Cisco NX-OS=7.1\(1\)n1\(1\)
Cisco NX-OS=7.1\(1\)n1\(1a\)
Cisco NX-OS=7.1\(2\)n1\(1\)
Cisco NX-OS=7.1\(2\)n1\(1a\)
Cisco NX-OS=7.1\(3\)n1\(1\)
Cisco NX-OS=7.1\(3\)n1\(2\)
Cisco NX-OS=7.1\(3\)n1\(2a\)
Cisco NX-OS=7.1\(3\)n1\(3\)
Cisco NX-OS=7.1\(3\)n1\(4\)
Cisco NX-OS=7.1\(3\)n1\(5\)
Cisco NX-OS=7.1\(4\)n1\(1\)
Cisco NX-OS=7.1\(4\)n1\(1a\)
Cisco NX-OS=7.1\(4\)n1\(1c\)
Cisco NX-OS=7.1\(4\)n1\(1d\)
Cisco NX-OS=7.1\(5\)n1\(1\)
Cisco NX-OS=7.1\(5\)n1\(1b\)
Cisco NX-OS=7.2\(0\)d1\(1\)
Cisco NX-OS=7.2\(0\)n1\(1\)
Cisco NX-OS=7.2\(1\)d\(1\)
Cisco NX-OS=7.2\(1\)n1\(1\)
Cisco NX-OS=7.2\(2\)d1\(1\)
Cisco NX-OS=7.2\(2\)d1\(2\)
Cisco NX-OS=7.2\(2\)d1\(3\)
Cisco NX-OS=7.2\(2\)d1\(4\)
Cisco NX-OS=7.3\(0\)d1\(1\)
Cisco NX-OS=7.3\(0\)dx\(1\)
Cisco NX-OS=7.3\(0\)n1\(1\)
Cisco NX-OS=7.3\(0\)n1\(1a\)
Cisco NX-OS=7.3\(0\)n1\(1b\)
Cisco NX-OS=7.3\(1\)d1\(1\)
Cisco NX-OS=7.3\(1\)n1\(1\)
Cisco NX-OS=7.3\(2\)d1\(1\)
Cisco NX-OS=7.3\(2\)d1\(1d\)
Cisco NX-OS=7.3\(2\)d1\(2\)
Cisco NX-OS=7.3\(2\)d1\(3\)
Cisco NX-OS=7.3\(2\)d1\(3a\)
Cisco NX-OS=7.3\(2\)n1\(1\)
Cisco NX-OS=7.3\(2\)n1\(1b\)
Cisco NX-OS=7.3\(2\)n1\(1c\)
Cisco NX-OS=7.3\(3\)d1\(1\)
Cisco NX-OS=7.3\(3\)n1\(1\)
Cisco NX-OS=7.3\(4\)d1\(1\)
Cisco NX-OS=7.3\(4\)n1\(1\)
Cisco NX-OS=7.3\(4\)n1\(1a\)
Cisco NX-OS=7.3\(5\)d1\(1\)
Cisco NX-OS=7.3\(5\)n1\(1\)
Cisco NX-OS=7.3\(6\)n1\(1\)
Cisco NX-OS=7.3\(6\)n1\(1a\)
Cisco NX-OS=7.3\(7\)n1\(1\)
Cisco NX-OS=7.3\(7\)n1\(1a\)
Cisco NX-OS=7.3\(7\)n1\(1b\)
Cisco NX-OS=8.0\(1\)
Cisco NX-OS=8.1\(1\)
Cisco NX-OS=8.1\(1a\)
Cisco NX-OS=8.1\(1b\)
Cisco NX-OS=8.1\(2\)
Cisco NX-OS=8.1\(2a\)
Cisco NX-OS=8.2\(1\)
Cisco NX-OS=8.2\(2\)
Cisco NX-OS=8.2\(3\)
Cisco NX-OS=8.2\(4\)
Cisco NX-OS=8.2\(5\)
Cisco NX-OS=8.3\(1\)
Cisco NX-OS=8.3\(2\)
Cisco NX-OS=8.4\(1\)
Cisco NX-OS=8.4\(1a\)
Cisco NX-OS=9.2\(1\)
Cisco NX-OS=9.2\(2\)
Cisco NX-OS=9.2\(2t\)
Cisco NX-OS=9.2\(2v\)
Cisco NX-OS=9.2\(3\)
Cisco NX-OS=9.2\(3y\)
Cisco NX-OS=9.3\(1\)
Cisco NX-OS=9.3\(1z\)
Cisco NX-OS=9.3\(2\)
Cisco NX-OS=9.3\(3\)
Cisco MDS 9100
Cisco MDS 9200
Cisco MDS 9500
Cisco MDS 9700
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 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 Nexus 36180YC-R Firmware
Cisco Nexus 3636C-R Firmware
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 Nexus 7000
Cisco Nexus 7700 series
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 Nexus 9504 firmware
Cisco Nexus 9508
Cisco Nexus 9516 firmware
Cisco NX-OS<3.2\(3o\)
Cisco NX-OS>=4.0<4.0\(4i\)
Cisco NX-OS>=4.1<4.1\(1c\)
Cisco UCS 6248UP
Cisco UCS 6296UP
Cisco UCS 6300 firmware
Cisco UCS 6324 firmware
Cisco UCS 64108
Cisco UCS 6454 Fabric Interconnect

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Frequently Asked Questions

  • What is the severity of CVE-2020-3517?

    The severity of CVE-2020-3517 is classified as high, as it could allow an unauthenticated attacker to cause process crashes, leading to a denial of service condition.

  • How do I fix CVE-2020-3517?

    To fix CVE-2020-3517, it is recommended to update the affected Cisco NX-OS or FXOS Software to the latest version provided by Cisco that addresses this vulnerability.

  • What systems are affected by CVE-2020-3517?

    CVE-2020-3517 affects Cisco NX-OS Software and Cisco FXOS Software, specifically versions prior to the recommended updates.

  • What kind of attack is associated with CVE-2020-3517?

    CVE-2020-3517 is associated with a denial of service (DoS) attack that can be executed without authentication by exploiting vulnerabilities in the Cisco Fabric Services component.

  • Are there any workarounds for CVE-2020-3517?

    Cisco has not provided specific workarounds for CVE-2020-3517, and the best mitigation is to apply the necessary software upgrades.

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