cisco-sa-20190515-sb-snmpdos: Cisco Small Business Series Switches Simple Network Management Protocol Denial of Service Vulnerability
First published: Wed May 15 2019(Updated: )
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://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb-snmpdos
Credit: Patrick S. Stuckenberger August Manser AG
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Products | =Small Business Sx250, Sx350, Sx550 Series Switches<2.5.0.78=Small Business Sx200, Sx300, Sx500, ESW2 Series Managed Switches<1.4.10.6 | 2.5.0.78 1.4.10.6 |
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Frequently Asked Questions
What is the severity of cisco-sa-20190515-sb-snmpdos?
The severity of the cisco-sa-20190515-sb-snmpdos vulnerability is classified as high.
How do I fix cisco-sa-20190515-sb-snmpdos?
To fix the cisco-sa-20190515-sb-snmpdos vulnerability, upgrade to the latest provided software versions for the affected Cisco Small Business switches.
What systems are affected by cisco-sa-20190515-sb-snmpdos?
The cisco-sa-20190515-sb-snmpdos vulnerability affects Cisco Small Business Sx200, Sx300, Sx500, ESW2 Series Managed Switches, and Sx250, Sx350, Sx550 Series Switches.
Who can exploit cisco-sa-20190515-sb-snmpdos?
An authenticated, remote attacker can exploit the cisco-sa-20190515-sb-snmpdos vulnerability.
What can an attacker do with cisco-sa-20190515-sb-snmpdos?
An attacker exploiting cisco-sa-20190515-sb-snmpdos can cause a denial of service condition on the affected switches.
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