What is VLAN Hopping Attack?

What is VLAN Hopping Attack?

Feb 28, 2023 / By Securium solutions

A VLAN Hopping Attack is a type of network security vulnerability that allows an attacker to bypass VLAN security measures and gain unauthorized access to sensitive information. VLAN Hopping Attack can occur on both wired and wireless networks and can be carried out in several ways.

One common method of VLAN hopping is through the use of double-tagging. In this scenario, the attacker sends frames with two VLAN tags, allowing them to bypass the access control list (ACL) and gain access to other VLANs. The attacker can then intercept and steal sensitive data or carry out other forms of malicious activity.

VLAN Hopping Attack

Another method of VLAN Hopping Attack is through the use of a switch spoofing attack. In this type of attack, the attacker tricks a switch into thinking that the attacker’s device is a trunk port, which allows the attacker to bypass the VLAN security measures and access other VLANs on the network.

Prevent VLAN hopping attacks

To prevent VLAN Hopping Attack, it’s essential to implement proper security measures. One way to prevent double-tagging attacks is to configure switches to only accept frames with a single VLAN tag. It’s also important to limit the number of devices that can access each VLAN and configure switches to prevent trunk ports from being compromised.

To prevent switch spoofing attacks, it’s important to use strong authentication measures and limit physical access to switches. Switches should also be regularly audited and tested to identify vulnerabilities and remediate them before they can be exploited.

In conclusion, VLAN Hopping Attack are a significant threat to network security, allowing attackers to bypass VLAN security measures and gain unauthorized access to sensitive information. Organizations can prevent these attacks by implementing proper security measures, including limiting the number of devices that can access each VLAN, configuring switches to prevent trunk port compromise, and regularly auditing and testing network infrastructure to identify and remediate vulnerabilities.


Pradeep Singh

VAPT Analyst

Table of Contents

Social Media