Infromation Disclosure (Labs: Portswigger Academy)

Labs from PortSwigger Academy

Lab 1: Information disclosure in error messages

GET /product?productId=1 --> Request to load product

add ' , we will get verbose error with framework's version number
GET /product?productId=1'

Lab 2: Information disclosure on debug page

This lab contains a debug page that discloses sensitive information about the application. To solve the lab, obtain and submit the SECRET_KEY environment variable.

Using Burpsuite's Engagegement tools > Discover Contents, we find /cgi-bin
inside /cgi-bin there is /phpinfo.php which leaks SECRET_KEY.

Lab 3: Source code disclosure via backup files

This lab leaks its source code via backup files in a hidden directory. To solve the lab, identify and submit the database password, which is hard-coded in the leaked source code.

Using Burpsuite's Engagegement tools > Discover Contents, we find /backup 
/backup contains ProductTemplate.java.bak

Lab 4: Authentication bypass via information disclosure

This lab's administration interface has an authentication bypass vulnerability, but it is impractical to exploit without knowledge of a custom HTTP header used by the front-end.

To solve the lab, obtain the header name then use it to bypass the lab's authentication. Access the admin interface and delete the user carlos.

You can log in to your own account using the following credentials: wiener:peter

visiting GET /admin shows Admin interface only available to local users

TRACE /admin shows X-Custom-IP-Authorization: OUR IP

in GET /admin add X-Custom-IP-Authorization: 127.0.0.1 
(we are now admin)

Lab 5: Information disclosure in version control history

This lab discloses sensitive information via its version control history. To solve the lab, obtain the password for the administrator user then log in and delete the user carlos.

there exists .git folder,
wget the .git into your device, and check the commits