CVE-2021-34776 Explained : Impact and Mitigation
Learn about CVE-2021-34776, multiple vulnerabilities in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business 220 Series Smart Switches. Find out the impact, technical details, affected systems, and mitigation steps.
Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business 220 Series Smart Switches. An attacker could execute code on the affected device, cause it to reload unexpectedly, or corrupt the LLDP database. To exploit these vulnerabilities, the attacker must be in the same broadcast domain as the affected device. Cisco has released firmware updates to address these issues.
Understanding CVE-2021-34776
These vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business 220 Series Smart Switches.
What is CVE-2021-34776?
The CVE-2021-34776 vulnerability involves multiple security issues in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business 220 Series Smart Switches.
The Impact of CVE-2021-34776
An unauthenticated, adjacent attacker could execute code on the affected device, cause it to reload unexpectedly, or corrupt the LLDP database.
Technical Details of CVE-2021-34776
The following are the technical details related to CVE-2021-34776:
Vulnerability Description
The vulnerabilities allow an attacker in the same broadcast domain to exploit the Link Layer Discovery Protocol (LLDP) implementation on Cisco Small Business 220 Series Smart Switches.
Affected Systems and Versions
The affected product is the Cisco Small Business 200 Series Smart Switches, and the specific versions impacted are not applicable (n/a).
Exploitation Mechanism
To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device.
Mitigation and Prevention
It is crucial to take immediate steps and implement long-term security practices to mitigate the risks associated with CVE-2021-34776.
Immediate Steps to Take
Ensure that the Cisco Small Business 220 Series Smart Switches are updated with the latest firmware releases from Cisco.
Long-Term Security Practices
Regularly monitor and update network devices to address emerging security vulnerabilities.
Patching and Updates
Cisco has released firmware updates to address the vulnerabilities in the Link Layer Discovery Protocol implementation for the Cisco Small Business 220 Series Smart Switches.