Java - Information Leakeage in Comments

Running the app on Docker

$ sudo docker pull blabla1337/owasp-skf-lab:java-info-leakage-comments

$ sudo docker run -ti -p 127.0.0.1:5000:5000 blabla1337/owasp-skf-lab:java-info-leakage-comments

Now that the app is running let's go hacking!

Reconnaissance

It is very common, and even recommended, for programmers to include detailed comments and metadata on their source code. However, comments and metadata included into the HTML code might reveal internal information that should not be available to potential attackers. Comments and metadata review should be done in order to determine if any information is being leaked.

When we start the application we can see that there is a login form.

Exploitation

What we are going to do is explore and check the source code of the website in order to find some useful information that the programmer may have forgotten in the source code.