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Securing an API is a critical task. A poor API design may lead to system compromise. Its impact becomes more critical when a crucial service gets affected like a Banking API.
The Banking WebApp allows a user to make unrestricted login attempts without placing any rate limit on the number of requests per day. Moreover, admin user had set a weak password on his account.
Note: The authorization system relies on a scope parameter in the issued token. If the token issued to a user has the scope of "account-write", then they get write access on the account, else, for token having the scope of "account-read", the user gets read-only access to the account.
Objective: Leverage the vulnerability to hijack admin's account and retrieve the Golden Ticket from the Bank API!
|/issue||Issue a JWT Token used as an authorization mechanism||POST||identifier, password|
|/balance||Read the balance of an account||GET||acct, token|
|/balance||Modify the account balance||POST||acct, token, balance|
|/goldenticket||Get the Golden Ticket from the Bank API||POST||token|
- This lab is dedicated to you! No other users are on this network :)
- Once you start the lab, you will have access to a Kali GUI instance.
- Your Kali instance has an interface with IP address 192.X.Y.2. Run "ifconfig" to know the values of X and Y.
- The Banking WebApp is running on port 5000 on the target machine having IP address 192.X.Y.3.
- The wordlist required to bruteforce the password is provided in "/root/Desktop/wordlists" directory.
- Do not attack the gateway located at IP address 192.X.Y.1
The following activities are strictly prohibited on this website unless otherwise explicitly stated as allowed in the mission statement:
- Using automated scanners
- Using brute force attacks
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- Attacking other student machines in challenges where you might achieve a shell on the vulnerable system
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