Facebook Vulnerability Reflected File Download

Before starting with the write up i want to share the response that i got from facebook after reporting the bug.

Hi Rio,

Thank you for sharing this information with us. Although this issue does not qualify as a part of our bounty program we appreciate your report. We will follow up with you on any security bugs or with any further questions we may have.

I will let you guys decide if its a vulnerability or not.
Lets begin.

The vulnerability existed and still exists at

https://graph.facebook.com/

The vulnerability exists because the api reflects data from the url and since we can inject a malicious payload.

Visiting the following url:

https://graph.facebook.com/injected%20in%20json%7C%7Ccalc.exe%7C%7C?callback=random

Since the data is reflected our main goal is to to make this get saved as a file.

Facebook did not have a content-disposition so our way to download is to use html5 download attribute.

Lets create a html file. ("test.html") and put the following content.

<a href='https://graph.facebook.com/rio/;/test.bat;"||calc.exe||?callback=random' download="test.bat">Download</a>

Now lets open the test.html and click download.

Basically we downloaded a bat file with our injected payload from the facebook website.

VIDEO:

Thanks
Rio Sherri

SkyTower CTF Walkthrough

VM Author Description

This CTF was designed by Telspace Systems for the CTF at the ITWeb Security Summit and BSidesCPT (Cape Town). The aim is to test intermediate to advanced security enthusiasts in their ability to attack a system using a multi-faceted approach and obtain the “flag”.
You will require skills across different facets of system and application vulnerabilities, as well as an understanding of various services and how to attack them. Most of all, your logical thinking and methodical approach to penetration testing will come into play to allow you to successfully attack this system. Try different variations and approaches. You will most likely find that automated tools will not assist you.

Author: Telspace Systems

Download: VulnHub

WordSteal - Stealing Windows Credentials through crafted document

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Then I remembered a post about a Word Exploit generator which used an unusual way to track how many times the document was opened. Microsoft Word had an undocumented function that can load a remote picture. The malware creators used http to map the users who opened the files.

Then I thought why not trying the 'file://' handler.
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OSCE - CTP Course Preparation - HeapSpray + SEH + EggHunter

Introduction Hello humans! I have been busy working preparing myself for the CTP Course and wanted to share my experience.
Just a quick disclaimer , i am not an expert exploit developer so maybe i have made some mistakes and certainly there are better ways to do the things but hey we must Try harder. In this post we will combine some exploitation methods to make a reliable vulnerability for RSP Mp3 OCX on Windows XP Sp3 (IE 7).
I know the software are outdated and not anything new but We must learn to walk before we can run.
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