critical
9.8
CWE
20 119
Advisory Published

cisco-sa-20180620-fx-os-fabric-execution: Cisco FXOS and NX-OS Software Cisco Fabric Services Arbitrary Code Execution Vulnerability

First published: Wed Jun 20 2018(Updated: )

A vulnerability in the Cisco Fabric Services (CFS) component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device. The vulnerability exists because the affected software insufficiently validates Cisco Fabric Services packet headers when the software processes packet data. An attacker could exploit this vulnerability by sending a maliciously crafted Cisco Fabric Services packet to an affected device. A successful exploit could allow the attacker to cause a buffer overflow condition on the device, which could allow the attacker to execute arbitrary code on the device. 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-execution 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(1d)=3.1<3.2(1d)=3.0<3.2(1d)=2.5<3.2(1d)=2.2<3.2(1d)=Prior to 2.2<3.2(1d)
3.2(1d)
3.2(1d)
3.2(1d)
3.2(1d)
3.2(1d)
3.2(1d)

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this Cisco vulnerability?

    The vulnerability ID for this Cisco vulnerability is cisco-sa-20180620-fx-os-fabric-execution.

  • What is the severity rating for the vulnerability?

    The severity rating for the vulnerability is critical with a score of 9.8.

  • Which software versions are affected by the vulnerability?

    The Cisco FXOS Software versions 2.2.2 up to 2.2.2.17, 2.2.1 up to 2.2.1.70, 2.1.1 up to 2.1.1.86, 2.0 up to 2.0.1.153, and 1.1 up to 1.1.4.179 are affected. The Cisco NX-OS Software versions 8.1 up to 8.1(1a), 7.3 up to 8.1(1a), 6.2 up to 6.2(21), and 5.2 up to 6.2(21) are also affected.

  • How can an attacker exploit this vulnerability?

    An unauthenticated, remote attacker can exploit this vulnerability to execute arbitrary code on an affected device.

  • Is there a fix available for this vulnerability?

    Yes, Cisco has provided a fix for this vulnerability and users are advised to upgrade to the recommended versions mentioned in the Cisco Security Advisory.

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