CVE-2021-34779: 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...

Summary

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 ...

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software

Vendor	Product	Affected versions
cisco	business_220-8t-e-2g_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-8t-e-2g_firmware::::::::`
cisco	business_220-8p-e-2g_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-8p-e-2g_firmware::::::::`
cisco	business_220-8fp-e-2g_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-8fp-e-2g_firmware::::::::`
cisco	business_220-16t-2g_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-16t-2g_firmware::::::::`
cisco	business_220-16p-2g_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-16p-2g_firmware::::::::`
cisco	business_220-24t-4g_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-24t-4g_firmware::::::::`
cisco	business_220-24p-4g_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-24p-4g_firmware::::::::`
cisco	business_220-24fp-4g_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-24fp-4g_firmware::::::::`
cisco	business_220-48t-4g_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-48t-4g_firmware::::::::`
cisco	business_220-48p-4g_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-48p-4g_firmware::::::::`
cisco	business_220-24t-4x_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-24t-4x_firmware::::::::`
cisco	business_220-24p-4x_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-24p-4x_firmware::::::::`
cisco	business_220-24fp-4x_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-24fp-4x_firmware::::::::`
cisco	business_220-48t-4x_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-48t-4x_firmware::::::::`
cisco	business_220-48p-4x_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-48p-4x_firmware::::::::`
cisco	business_220-48fp-4x_firmware	<= 1.2.0.6 `cpe:2.3:o:cisco:business_220-48fp-4x_firmware::::::::`

Original advisory text

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...

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.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-s... Vendor Advisory