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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 reset their password if they provide a valid OTP sent on their registered email id. The issue is that the Bank API does not place any limit on the number of requests sent to any of the endpoints.
An attacker managed to get the credentials of a bank user using phishing. Using the available public information, the attacker was also able to figure out the email id and username of the admin account of the Banking API.
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.
This challenge is focused on leveraging the Broken Authentication in the Banking API.
Objective: Retrieve the Golden Ticket!
|/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 OTP contains 4-digit, each in the range 0 to 9 inclusive.
- 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
- Denial of Service attacks
- Attacking other student machines in challenges where you might achieve a shell on the vulnerable system
- Attacking the lab infrastructure
Users violating the above will be either temporarily or permanently banned from the website.
If you are unsure about an activity, then please contact support to confirm that it is allowed on our website.
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