ESB-2018.1814 - [Cisco] Cisco Nexus 4000 Series: Denial of service - Existing account 2018-06-21

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1814
         Cisco Nexus 4000 Series Switch Simple Network Management
             Protocol Polling Denial of Service Vulnerability
                               21 June 2018

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

Product:           Cisco Nexus 4000 Series
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-0299  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-n4k-snmp-dos

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Cisco Security Advisory: Cisco Nexus 4000 Series Switch Simple Network 
Management Protocol Polling Denial of Service Vulnerability

Advisory ID: cisco-sa-20180620-n4k-snmp-dos

Revision: 1.0

For Public Release: 2018 June 20 16:00 GMT

Last Updated: 2018 June 20 16:00 GMT

CVE ID(s): CVE-2018-0299

CVSS Score v(3): 7.7 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

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Summary

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A vulnerability in the Simple Network Management Protocol (SNMP) feature of 
the Cisco Nexus 4000 Series Switch could allow an authenticated, remote 
attacker to cause the device to unexpectedly reload, resulting in a denial of
service (DoS) condition.

The vulnerability is due to incomplete validation of an SNMP poll request for
a specific MIB. An attacker could exploit this vulnerability by sending a 
specific SNMP poll request to the targeted device. An exploit could allow the
attacker to cause the device to reload, resulting in 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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-n4k-snmp-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

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