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Cisco Small Business 220 Series Smart Switches Link Layer Discovery Protocol Vulnerabilities

Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business 220 Series Smart Switches. An unauthenticated, adjacent attacker could perform the following:

• Execute code on the affected device or cause it to reload unexpectedly


• Cause LLDP database corruption on the affected device

For more information about these vulnerabilities, see the Details section of this advisory.

Note: LLDP is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).

Cisco has released firmware updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb220-lldp-multivuls-mVRUtQ8T

     
         
Security Impact Rating:  High
   
   
       
CVE: CVE-2021-34775,CVE-2021-34776,CVE-2021-34777,CVE-2021-34778,CVE-2021-34779,CVE-2021-34780
Source: Cisco Small Business 220 Series Smart Switches Link Layer Discovery Protocol Vulnerabilities (https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb220-lldp-multivuls-mVRUtQ8T?vs_f=Cisco%20Security%20Advisory&vs_cat=Security%20Intelligence&vs_type=RSS&vs_p=Cisco%20Small%20Business%20220%20Series%20Smart%20Switches%20Link%20Layer%20Discovery%20Protocol%20Vulnerabilities&vs_k=1)