ESB-2018.1817 - [Cisco] Cisco FXOS, NX-OS, and UCS Manager: Denial of service - Remote/unauthenticated 2018-06-21

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1817
        Cisco FXOS, NX-OS, and UCS Manager Software Cisco Discovery
                 Protocol Denial of Service Vulnerability
                               21 June 2018

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cisco FXOS
                   Cisco NX-OS
                   Cisco UCS Manager
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-0331  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp

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Cisco Security Advisory: Cisco FXOS, NX-OS, and UCS Manager Software Cisco 
Discovery Protocol Denial of Service Vulnerability

Advisory ID: cisco-sa-20180620-nxos-cdp

Revision: 1.0

For Public Release: 2018 June 20 16:00 GMT

Last Updated: 2018 June 20 16:00 GMT

CVE ID(s): CVE-2018-0331

CVSS Score v(3): 7.4 CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

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Summary

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A vulnerability in the Cisco Discovery Protocol (formerly known as CDP) 
subsystem of devices running, or based on, Cisco NX-OS Software contain a 
vulnerability that could allow an unauthenticated, adjacent attacker to create
a denial of service (DoS) condition.

The vulnerability is due to a failure to properly validate certain fields 
within a Cisco Discovery Protocol message prior to processing it. An attacker
with the ability to submit a Cisco Discovery Protocol message designed to 
trigger the issue could cause a DoS condition on an affected device while the
device restarts.

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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp

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

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