Bug Bounty for - Beginners

HIMANSHU KUMAR DAS

about.me

Infosec analyst at iViZ techno sol. Pvt. Ltd.

Passionate Capture The Flag(CTF) player.

Started bug bounty recently, listed on few Security Acknowledgement Pages, few $$$, few t-shirts.

Member of n|u community past 2 years 6 months.

todays talk

Prerequisites

Highlights

Initial Approach

Tools to tune

Automating on localhost.

Bug Submission/Reporting.

Demo…..

prerequisites patience……… of course, YES!!!

Ninja Skills, NO!!!

Operating System and web browser, a matter of argument, so you select!!!

Have you read any of these? OWASP Testing Guide v3 The Web Application Hacker’s Handbook- 2nd Edition RFC 2616 – HTTP/1.1

bug bounty program: highlights

Not limited to web applications, even networks and products.

Must be a Responsible Disclosure.

Lots of $$$ , gifts, t-shirts.

Test your: <script>alert(“Bounty”);</script>

initial approach

Did you read the scope?

Reconnaissance: CMS, default pages, paths, plugins( robots.txt,

phpinfo.php, .htaccess) Various subdomains Identify services

Understand the logic of any functionality.

Say No to SCANNERS!!!

tools to tune Web Proxy (Burp Suite, Fiddler, OWASP ZAP many others) Must have firefox addons:

web developer tamper Data wappalyzer foxyproxy user agent switcher live http headers ClickJacking Defense (

https://addons.mozilla.org/en-us/firefox/addon/clickjacking-defense-declar/)

and the counting goes on……………………

automating on localhost

Install web server on your local system.(WAMP, XAMPP)

Download and install product(CMS) on your local web server.

Time to input and sleep : Wfuzz intellifuzz-xss(By @matthewdfuller) Sqlmap IronWASP( By @lavakumark)

Few techniques to bypass security measures

Brute-force IP based blocking, user-agent based blocking. Account locked, yet account accessible.

Cross-site request forgery Token missing. Token not time-boxed. Token not validated. Token not random.

UI Redressing/ClickJacking Drag and Drop [ Discovered by ahamed nafeez(@skeptic_fx) ] Content Extraction (deprecated in modern browsers).

Bug Submission

Subject: Responsible Disclosure.

Nature/Description of the Bug.

Impact.

Testing Environment: OS, Browsers, Tools(if any).

Proof Of Concept: Video(avi/flv), Screenshot.

DEMO

Stored XSS through SVG

What is SVG?

Supports modern browser.

Dis-section of the payload. XML CDATA - All text in an XML document will be parsed by the

parser, But text inside a CDATA section will be ignored by the parser. To avoid errors script code can be defined as CDATA.

references / links

http://www.computersecuritywithethicalhacking.blogspot.in/

https://www.owasp.org/images/0/03/Mario_Heiderich_OWASP_Sweden_The_image_that_called_me.pdf

http://blog.skepticfx.com/2011/09/facebook-graph-api-access-token.html

http://www.riyazwalikar.com

http://www.amolnaik4.blogspot.com

DEMO – Stored XSS on FACEBOOKBY

Riyaz Ahemed Walikar@riyazwalikar

http://www.riyazwalikar.com

twitter: @mehimansue-mail: me.himansu@gmail.com

QUESTIONS ?

THANK YOU!!!