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                             CERT-Renater

                 Note d'Information No. 2019/VULN153

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DATE                : 16/05/2019

HARDWARE PLATFORM(S): Cisco Small Business Sx200, Sx300, Sx500, ESW2
                             Series Managed Switches,
                    Small Business Sx250, Sx350, Sx550 Series Switches.

OPERATING SYSTEM(S): Cisco Small Business Series Switches software,
               Cisco Small Business Series Managed Switches software.

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https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb-snmpdos
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Cisco Security Advisory: Cisco Small Business Series Switches Simple
Network Management Protocol Denial of Service Vulnerability

Advisory ID: cisco-sa-20190515-sb-snmpdos

Revision: 1.0

For Public Release: 2019 May 15 16:00 GMT

Last Updated: 2019 May 15 16:00 GMT

CVE ID(s): CVE-2019-1806

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) input
packet processor of Cisco Small Business Sx200, Sx300, Sx500, ESW2
Series Managed Switches and Small Business Sx250, Sx350, Sx550 Series
Switches could allow an authenticated, remote attacker to cause the SNMP
application of an affected device to cease processing traffic, resulting
in the CPU utilization reaching one hundred percent. Manual intervention
may be required before a device resumes normal operations.

The vulnerability is due to improper validation of SNMP protocol data
units (PDUs) in SNMP packets. An attacker could exploit this
vulnerability by sending a malicious SNMP packet to an affected device.
A successful exploit could allow the attacker to cause the device to
cease forwarding traffic, which could result in a denial of service
(DoS) condition.

Cisco has released firmware 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-20190515-sb-snmpdos
["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb-snmpdos"]


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+ CERT-RENATER        | tel : 01-53-94-20-44            +
+ 23/25 Rue Daviel    | fax : 01-53-94-20-41            +
+ 75013 Paris         | email:cert@support.renater.fr   +
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