CVE-2021-34780 : What You Need to Know
Discover multiple vulnerabilities in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business 220 Series Smart Switches. Learn about the impact, affected systems, and mitigation steps.
Multiple vulnerabilities have been discovered in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business 220 Series Smart Switches. These vulnerabilities could allow an unauthenticated attacker in the same broadcast domain to execute code, cause unexpected device reloads, or corrupt the LLDP database. Cisco has released firmware updates to address these issues.
Understanding CVE-2021-34780
This CVE identifies multiple vulnerabilities in the LLDP implementation of Cisco Small Business 220 Series Smart Switches.
What is CVE-2021-34780?
The CVE-2021-34780 involves vulnerabilities in the LLDP implementation that could be exploited by an unauthenticated attacker in the same broadcast domain as the affected device.
The Impact of CVE-2021-34780
The vulnerabilities in CVE-2021-34780 could allow attackers to execute arbitrary code, trigger unexpected reloads, and corrupt the LLDP database on the affected devices.
Technical Details of CVE-2021-34780
Cisco Small Business 220 Series Smart Switches are affected by these vulnerabilities.
Vulnerability Description
The vulnerabilities in the LLDP implementation of Cisco Small Business 220 Series Smart Switches could be exploited by an adjacent attacker to execute code and disrupt the normal operation of the devices.
Affected Systems and Versions
The affected product is the Cisco Small Business 200 Series Smart Switches, and all versions are susceptible to these vulnerabilities.
Exploitation Mechanism
To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the target device, making it a Layer 2 adjacent attack.
Mitigation and Prevention
Cisco has provided firmware updates to address the vulnerabilities in the LLDP implementation for the Cisco Small Business 220 Series Smart Switches.
Immediate Steps to Take
Users are advised to apply the latest firmware updates provided by Cisco to mitigate the risks associated with CVE-2021-34780.
Long-Term Security Practices
It is recommended to implement network segmentation and access controls to prevent unauthorized access to critical devices.
Patching and Updates
Regularly check for firmware updates and security advisories from Cisco to stay protected from known vulnerabilities.