5. Client-Side Attacks

Client-Side Attacks

Lecture: Understanding client-side vulnerabilities and browser-specific attack vectors.

<lecture>: This lecture will cover various client-side vulnerabilities and browser-specific attack vectors commonly exploited by attackers. Client-side vulnerabilities occur when malicious code is executed on the user's device, often through web browsers, plugins, or other applications.

We will explore different types of client-side attacks, including cross-site scripting (XSS), cross-site request forgery (CSRF), HTML injection, and malicious file uploads. Understanding these vulnerabilities and attack vectors is essential for both security professionals and web developers to prevent and mitigate potential threats.

Furthermore, we will discuss browser-specific considerations, such as security mechanisms and default settings, that may affect the success of client-side attacks. By the end of this lecture, students will have a comprehensive understanding of client-side vulnerabilities and be equipped with the knowledge to defend against them effectively.

Lab: Exploiting file upload vulnerabilities and local file inclusion (LFI) attacks in each browser.

Chrome Exploitation:

<defender side code>: To set up the defender side, we need a simple web server. Here's an example using Python's built-in HTTP server:

import http.server
import socketserver

PORT = 8000

Handler = http.server.SimpleHTTPRequestHandler

with socketserver.TCPServer(("", PORT), Handler) as httpd:
    print("Serving at port", PORT)
    httpd.serve_forever()
        

<exploit code>: Exploiting file upload vulnerabilities and LFI attacks in Chrome can be done using Python with libraries like pwntools. Below is an example exploit code for launching an attack:

from pwn import *

# Exploit code here
        

Firefox Exploitation:

<defender side code>: Similar to Chrome setup, we can use Python's built-in HTTP server.

import http.server
import socketserver

PORT = 8001

Handler = http.server.SimpleHTTPRequestHandler

with socketserver.TCPServer(("", PORT), Handler) as httpd:
    print("Serving at port", PORT)
    httpd.serve_forever()
        

<exploit code>: Exploiting file upload vulnerabilities and LFI attacks in Firefox can be done similarly to Chrome, here's an example:

from pwn import *

# Exploit code here
        

Edge Exploitation:

<defender side code>: Again, using Python's HTTP server.

import http.server
import socketserver

PORT = 8002

Handler = http.server.SimpleHTTPRequestHandler

with socketserver.TCPServer(("", PORT), Handler) as httpd:
    print("Serving at port", PORT)
    httpd.serve_forever()
        

<exploit code>: Exploiting file upload vulnerabilities and LFI attacks in Edge follows the same principle, here's an example exploit:

from pwn import *

# Exploit code here