Book Image

Network Protocols for Security Professionals

By : Yoram Orzach, Deepanshu Khanna
5 (1)
Book Image

Network Protocols for Security Professionals

5 (1)
By: Yoram Orzach, Deepanshu Khanna

Overview of this book

With the increased demand for computer systems and the ever-evolving internet, network security now plays an even bigger role in securing IT infrastructures against attacks. Equipped with the knowledge of how to find vulnerabilities and infiltrate organizations through their networks, you’ll be able to think like a hacker and safeguard your organization’s network and networking devices. Network Protocols for Security Professionals will show you how. This comprehensive guide gradually increases in complexity, taking you from the basics to advanced concepts. Starting with the structure of data network protocols, devices, and breaches, you’ll become familiar with attacking tools and scripts that take advantage of these breaches. Once you’ve covered the basics, you’ll learn about attacks that target networks and network devices. Your learning journey will get more exciting as you perform eavesdropping, learn data analysis, and use behavior analysis for network forensics. As you progress, you’ll develop a thorough understanding of network protocols and how to use methods and tools you learned in the previous parts to attack and protect these protocols. By the end of this network security book, you’ll be well versed in network protocol security and security countermeasures to protect network protocols.
Table of Contents (23 chapters)
1
Part 1: Protecting the Network – Technologies, Protocols, Vulnerabilities, and Tools
7
Part 2: Network, Network Devices, and Traffic Analysis-Based Attacks
12
Part 3: Network Protocols – How to Attack and How to Protect

Packet injection

In wireless networks, packet injection is a technique in which an attacker injects malformed packets into an ongoing transmission. These packets will look like legitimate data packets to perform certain tasks, such as intercepting the communication. Packet injection can be performed by many means and methods, but for this chapter, we will use the Scapy module:

  1. Let's first check whether the packet injection is working successfully on our target AP. To perform this, we will be using aireplay-ng -9 -e WirelessRed wlan0.

Figure 11.12 – Packet injection working successfully

Tip

This can be verified in Wireshark with filters – wlan.bssid == CA:58:C0:13:2E:5F) && !(wlan.fc.type_subtype == 0x08. Please feel free to explore this further.

Now, let's move forward and do some real stuff that red teamers do in real-time injections. There are many techniques available on the internet to create our packets...