6. Advanced Browser Exploitation Techniques

Advanced Browser Exploitation Techniques

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

<lecture>: This lecture will delve into advanced browser exploitation techniques, focusing on sophisticated attack vectors such as browser fingerprinting, sandbox escape, and exploit chaining.

Browser fingerprinting involves the identification of unique browser and device characteristics, enabling tracking across the web. We'll explore fingerprinting techniques, including canvas and font fingerprinting, and discuss countermeasures.

Sandbox escape refers to breaking out of browser security sandboxes, granting attackers elevated privileges. We'll examine real-world sandbox escape techniques, such as exploiting browser vulnerabilities or OS-level weaknesses.

Exploit chaining involves combining multiple vulnerabilities to achieve a more significant impact. We'll analyze examples of exploit chaining, demonstrating how attackers string together vulnerabilities to bypass defenses.

By the end of this lecture, students will have an advanced understanding of browser exploitation techniques, equipping them to defend against sophisticated attacks.

Lab: Advanced exercises focusing on real-world scenarios across Chrome, Firefox, and Edge.

Chrome Exploitation:

<defender side code>: Set up a web server to simulate a vulnerable application:

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>: Exploit a sandbox escape vulnerability (e.g., CVE-2023-12345) in Chrome using Python and pwntools:

from pwn import *

# Exploit code for CVE-2023-12345
# For example:
exploit = b'...'
exploit += b'...'
exploit.execute()
        

Firefox Exploitation:

<defender side code>: Similar setup as Chrome, using Python's 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>: Exploit a browser fingerprinting vulnerability (e.g., CVE-2023-54321) in Firefox:

from pwn import *

# Exploit code for CVE-2023-54321
# For example:
exploit = b'...'
exploit += b'...'
exploit.execute()
        

Edge Exploitation:

<defender side code>: Use Python's HTTP server to set up the defender side:

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>: Perform exploit chaining (e.g., CVE-2023-67890) in Edge:

from pwn import *

# Exploit code for CVE-2023-67890
# For example:
exploit = b'...'
exploit += b'...'
exploit.execute()