CVE-2021-34775 : What You Need to Know

This article provides details about CVE-2021-34775, which involves multiple vulnerabilities in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business 220 Series Smart Switches.

Understanding CVE-2021-34775

CVE-2021-34775 refers to multiple vulnerabilities found in the LLDP implementation for Cisco Small Business 220 Series Smart Switches.

What is CVE-2021-34775?

Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business 220 Series Smart Switches. An unauthenticated, adjacent attacker could exploit these vulnerabilities to execute code on the affected device, cause unexpected reloads, or corrupt the LLDP database.

The Impact of CVE-2021-34775

The vulnerabilities could allow attackers in the same broadcast domain as the affected device to execute malicious activities. Cisco has released firmware updates to address these issues.

Technical Details of CVE-2021-34775

This section covers specific technical details related to CVE-2021-34775.

Vulnerability Description

The vulnerabilities in the LLDP implementation for Cisco Small Business 220 Series Smart Switches could lead to code execution, unexpected reloads, and database corruption.

Affected Systems and Versions

Cisco Small Business 220 Series Smart Switches are affected by these vulnerabilities.

Exploitation Mechanism

An unauthenticated, adjacent attacker could exploit these vulnerabilities by being in the same broadcast domain as the affected device.

Mitigation and Prevention

To address CVE-2021-34775, certain mitigation and prevention strategies can be implemented.

Immediate Steps to Take

Users should apply the firmware updates provided by Cisco to mitigate the vulnerabilities.

Long-Term Security Practices

Implementing network segmentation and access controls can help prevent unauthorized access.

Patching and Updates

Regularly updating firmware and security patches is crucial to protect against known vulnerabilities.