high
8.6
CWE
476
Advisory Published

cisco-sa-20180620-fx-os-fabric-dos: Cisco FXOS and NX-OS Software Cisco Fabric Services Denial of Service Vulnerability

First published: Wed Jun 20 2018(Updated: )

A vulnerability in the Cisco Fabric Services component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the affected device. The vulnerability exists because the affected software insufficiently validates Cisco Fabric Services packets. An attacker could exploit this vulnerability by sending a crafted Cisco Fabric Services packet to an affected device. A successful exploit could allow the attacker to force a NULL pointer dereference and cause a DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-fx-os-fabric-dos This advisory is part of the June 2018 Cisco FXOS and NX-OS Software Security Advisory Collection, which includes 24 Cisco Security Advisories that describe 24 vulnerabilities. For a complete list of the advisories and links to them, see Cisco Event Response: June 2018 Cisco FXOS and NX-OS Software Security Advisory Collection.

Affected SoftwareAffected VersionHow to fix
Cisco FXOS Software=2.2.2<2.2.2.17=2.2.1<2.2.1.70=2.1.1<2.1.1.86=2.0<2.0.1.153=1.1<1.1.4.179
2.2.2.17
2.2.1.70
2.1.1.86
2.0.1.153
1.1.4.179
Cisco NX-OS Software=8.1<8.1(1a)=7.3<8.1(1a)=6.2<6.2(21)=5.2<6.2(21)
8.1(1a)
8.1(1a)
6.2(21)
6.2(21)
Cisco NX-OS Software
Cisco NX-OS Software=6.2<6.2(20)
6.2(20)
Cisco NX-OS Software=3.2<3.2(2b)=3.1<3.2(2b)=3.0<3.2(2b)=2.5<3.2(2b)=2.2<3.2(2b)=Prior to 2.2<3.2(2b)
3.2(2b)
3.2(2b)
3.2(2b)
3.2(2b)
3.2(2b)
3.2(2b)

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability in Cisco FXOS and NX-OS Software?

    The vulnerability is a Cisco Fabric Services Denial of Service vulnerability.

  • What is the severity of Cisco vulnerability cisco-sa-20180620-fx-os-fabric-dos?

    The severity of the vulnerability is high, with a CVSS score of 8.6.

  • How does the vulnerability in Cisco FXOS and NX-OS Software affect the affected devices?

    The vulnerability can cause a denial of service (DoS) condition on the affected device.

  • Which versions of Cisco FXOS Software are affected by the vulnerability?

    The affected versions of Cisco FXOS Software include 2.2.2.17, 2.2.1.70, 2.1.1.86, 2.0.1.153, and 1.1.4.179.

  • How can I fix the Cisco vulnerability cisco-sa-20180620-fx-os-fabric-dos?

    To fix the vulnerability, it is recommended to upgrade to the latest available version of Cisco FXOS Software or Cisco NX-OS Software, as specified in the Cisco Security Advisory.

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