CVE-2021-34779
Description
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.
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco business_220-8t-e-2g_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-8p-e-2g_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-8fp-e-2g_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-16t-2g_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-16p-2g_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-24t-4g_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-24p-4g_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-24fp-4g_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-48t-4g_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-48p-4g_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-24t-4x_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-24p-4x_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-24fp-4x_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-48t-4x_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-48p-4x_firmware | v ≤ 1.2.0.6 | — |
| cisco business_220-48fp-4x_firmware | v ≤ 1.2.0.6 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.