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Web Hacking by Peter Yaworski GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Web Hacking is a self published book by Peter Yaworski.
I received a PDF copy for free when I registered as a bug bounty participant at hackerone. I recommend this book to anyone who wants to understand exactly how the world of bug bounties works and what the actual work is like. Twitter Web Intents Summary 6. Shopify Twitter Disconnect 2. Change Users Instacart Zones 3. Badoo Full Account Takeover Summary 7. Coinbase Comments 2. Within Security Content Spoofing Summary 8. Cross-Site Scripting Description Examples 1. Shopify Wholesale 2. Shopify Giftcard Cart 3.
Shopify Currency Formatting 4. Google Image Search 6. Uber Angular Template Injection 2. Uber Template Injection 3. Rails Dynamic Render Summary Drupal SQL Injection 2. Internal Port Scanning Summary Read Access to Google 2.
Facebook XXE with Word 3. Wikiloc XXE Summary Remote Code Execution Description Examples 1. Polyvore ImageMagick 2. Algolia RCE on facebooksearch. Python Hotshot Module 3. Libcurl Read Out of Bounds 4. Sub Domain Takeover Description Examples 1. Ubiquiti Sub Domain Takeover 2. Shopify Windsor Sub Domain Takeover 4. Snapchat Fastly Takeover 5. Black Book of Viruses and Hacking. Secrets of Super and Professional Hackers. The Hacker CTF is a game designed to let you learn to hack in a safe, rewarding environment.
Hacker is a free educational site for hackers, run by HackerOne. While it's not about technical writing I think Kurt Vonnegut's advice will help you to make a better write up. Specifically 7. Please help Peter Yaworski by spreading the word about this book on Twitter! Not only would I never have finished this book without you, my journey into hacking never would have even begun.
Those sales also allow me to take time away from hacking to continually add content and make the book better so we can all learn together. However, there is a small group who paid more than the suggested price when making their purchases, which really goes a long way. They include: 1. Ebrietas0 2. Mystery Buyer 3. Mystery Buyer 4. Mystery Buyer 6.
SpamOnline 7. Danyl0D Danylo Matviyiv 8. Mystery Buyer 9. To everyone who purchased a copy of this, thank you! Contents 1. Open Redirect Vulnerabilities. Shopify Theme Install Open Redirect. Shopify Login Open Redirect. HackerOne Interstitial Redirect. HackerOne Social Sharing Buttons. Twitter Unsubscribe Notifications. Twitter Web Intents. Cross-Site Request Forgery. Shopify Twitter Disconnect.
Change Users Instacart Zones. Badoo Full Account Takeover. HTML Injection. Coinbase Comments. Within Security Content Spoofing. CRLF Injection. Cross-Site Scripting. Shopify Wholesale. Shopify Giftcard Cart. Shopify Currency Formatting. Google Image Search. United Airlines XSS.
Template Injection. Uber Angular Template Injection. Uber Template Injection. Rails Dynamic Render. SQL Injection. Drupal SQL Injection.
Uber Blind SQLi. Server Side Request Forgery. Internal Port Scanning. Read Access to Google. Facebook XXE with Word. Wikiloc XXE. Remote Code Execution. Polyvore ImageMagick. Algolia RCE on facebooksearch. Python Hotshot Module. Libcurl Read Out of Bounds.
PHP Memory Corruption. Sub Domain Takeover. Ubiquiti Sub Domain Takeover. Shopify Windsor Sub Domain Takeover. Snapchat Fastly Takeover. Uber SendGrid Mail Takeover. Race Conditions. Starbucks Race Conditions.
Exceeding Keybase Invitation Limits. HackerOne Payments. Insecure Direct Object References. Moneybird App Creation. Swiping Facebook Official Access Tokens. Stealing Slack OAuth Tokens.
Stealing Google Drive Spreadsheets. Application Logic Vulnerabilities. Shopify Administrator Privilege Bypass.
HackerOne Signal Manipulation. Shopify S3 Buckets Open. HackerOne S3 Buckets Open. HackerOne Hacktivity Voting. Bypassing Twitter Account Protections. Getting Started. Vulnerability Reports. Then Include More. Appendix A - Take Aways. Appendix B - Web Hacking Changelog. Foreword The best way to learn is simply by doing. That is how we - Michiel Prins and Jobert Abma - learned to hack. We were young. Like all hackers who came before us, and all of those who will come after, we were driven by an uncontrollable, burning curiosity to understand how things worked.
We were mostly playing computer games, and by age 12 we decided to learn how to build software of our own. We shifted from building to breaking and hacking has been our passion ever since. While amusing at the time, we quickly learned there are consequences and these are not the kind of hackers the world needs.
The TV station and school were not amused and we spent the summer washing windows as our punishment. In college, we turned our skills into a viable consulting business that, at its peak, had clients in the public and private sector across the entire world. Our hacking experience led us to HackerOne, a company we co-founded in We believe this book will be a tremendous guide along your journey.
Another reason this book is so important is that it focuses on how to become an ethical hacker. Mastering the art of hacking can be an extremely powerful skill that we hope will be used for good. The most successful hackers know how to navigate the thin line between right and wrong while hacking. Many people can break things, and even try to make a quick buck doing so. But imagine you can make the Internet safer, work with amazing companies around the world, and even get paid along the way.
Your talent has the potential of keeping billions of people and their data secure. That is what we hope you aspire to. We are grateful to no end to Pete for taking his time to document all of this so eloquently.
We wish we had this resource when we were getting started. Happy reading, and happy hacking! Foreword 2 Remember to hack responsibly. Introduction Thank you for purchasing this book, I hope you have as much fun reading it as I did researching and writing it.
Web Hacking is my first book, meant to help you get started hacking. I began writing this as a self-published explanation of 30 vulnerabilities, a by-product of my own learning. It quickly turned into so much more.
My hope for the book, at the very least, is to open your eyes to the vast world of hacking. At best, I hope this will be your first step towards making the web a safer place while earning some money doing it. Having finished it though, I was left wondering how these hackers got started. So I kept reading. But looking for more answers, kept opening more and more doors. Around this same time, I was taking Coursera Android development courses and keeping an eye out for other interesting courses.
Luckily for me, it was just starting as of February , it is listed as Coming Soon and I enrolled. A few lectures in, I finally understood what a buffer overflow was and how it was exploited. I fully grasped how SQL injections were achieved whereas before, I only knew the danger. In short, I was hooked. Following the link, I was amazed.
I was reading a description of a vulnerability, written to a company, who then disclosed it to the world. Perhaps more importantly, the company actually paid the hacker to find and report this! That was a turning point, I became obsessed. Especially when a homegrown Canadian company, Shopify, seemed to be leading the pack in disclosures at the time.
Admittedly, at this stage, I was struggling to understand what the reports were detailing. Some of the vulnerabilities and methods of exploitation were hard to understand. Searching Google to try and understand one particular report, I ended on a GitHub issue thread for an old Ruby on Rails default weak parameter vulnerability this is detailed in the Application Logic chapter reported by Egor Homakov.
Following up on Egor led me to his blog, which includes disclosures for some seriously complex vulnerabilities. Reading about his experiences, I realized, the world of hacking might benefit from plain language explanations of real world vulnerabilities.
And it just so happened, that I learn better when teaching others. And so, Web Hacking was born. Just 30 Examples and My First Sale I decided to start out with a simple goal, find and explain 30 web vulnerabilities in easy to understand, plain language. I figured, at worst, researching and writing about vulnerabilities would help me learn about hacking.
The latter has yet to happen and at times, the former seems endless. Around the 15 explained vulnerabilities mark, I decided to publish my draft so it could be purchased - the platform I chose, LeanPub which most have probably purchased through , allows you to publish iteratively, providing customers with access to all updates.
I sent out a tweet thanking HackerOne and Shopify for their disclosures and to tell the world about my book. But within hours, I made my first sale. Introduction 5 Elated at the idea of someone actually paying for my book something I created and was pouring a tonne of effort into!
Turns out nothing. But then my phone vibrated, I received a tweet from Michiel Prins saying he liked the book and asked to be kept in the loop. Who the hell is Michiel Prins? I tried to stay positive, Michiel seemed supportive and did ask to be kept in the loop, so probably harmless.
Not long after my first sale, I received a second sale and figured I was on to something. About half way through, it dawned on me that the only other answer was written by Jobert Abma, one of the other Co-Founders of HackerOne.
A pretty authoritative voice on hacking. I hit submit and thought nothing of it. But then I received an interesting email: Hi Peter, I saw your Quora answer and then saw that you are writing a book about White Hat hacking. Would love to know more. A lot of things ran through my mind at this point, none of which were positive and pretty much all were irrational. In short, I figured the only reason Marten would email me was to drop the hammer on my book.
I replied to him explaining who I was and what I was doing - that I was trying to learn how to hack and help others learn along with me. Turns out, he was a big fan of the idea. In short, he offered to help. And man, has he ever. Since that initial email, I kept writing and Marten kept checking in. Michiel and Jobert reviewed drafts, provided suggestions and even contributed some sections. I mention all this because throughout this journey, HackerOne has never asked for anything in return.
As someone new to the hacking community, that resonated with me and I hope it does with you too. I personally prefer to be part of a supportive and inclusive community. So, since then, this book has expanded dramatically, well beyond what I initially envi- sioned. And with that, the target audience has also changed. I want this book to be an authoritative reference for understanding the different types of vulnerabilities, how to find them, how to report them, how to get paid and even, how to write defensive code.
This is really a book about learning together. As such, I share successes AND some of my notable and embarrassing failures. In some cases, I do reference sections previously discussed, but doing so, I try to connect the sections so you can flip back and forth. I want this book to be something you keep open while you hack. Chapter 5 covers Cross-Site Request Forgery vulnerabilities, walking through examples that show how users can be tricked into submitting information to a website they are logged into unknowingly.
One of the more interesting takeaways is how you can use encoded values to trick sites into accepting and rendering the HTML you submit, bypassing filters. Chapter 7 covers Carriage Return Line Feed Injections and in it, looking at examples of submitting carriage return, line breaks to sites and the impact it has on rendered content.
Chapter 8 covers Cross-Site Scripting, a massive topic with a huge variety of ways to achieve exploits. Cross-Site Scripting represents huge opportunities and an entire book could and probably should, be written solely on it. There are a tonne of examples I could have included here so I try to focus on the most interesting and helpful for learning. These types of vulnerabilities take advantage of developers injecting user input directly into templates when submitted using the template syntax.
The impact of these vulnerabilities depends on where they occur but can often lead to remote code executions. Chapter 10 covers structured query language SQL injections, which involve manipulat- ing database queries to extract, update or delete information from a site. These types of vulnerabilities can include things like reading private files, remote code execution, etc.
Chapter 13 covers Remote Code Execution, or the ability for an attacker to execute arbitrary code on a victim server. This type of vulnerability is among the most dangerous since an attacker can control what code is executed and is usually rewarded as such. Chapter 14 covers memory related vulnerabilities, a type of vulnerability which can be tough to find and are typically related to low level programming languages. However, discovering these types of bugs can lead to some pretty serious vulnerabilities.
Chapter 15 covers Sub Domain Takeovers, something I learned a lot about researching this book and should be largely credited to Mathias, Frans and the Dectectify team. Essentially here, a site refers to a sub domain hosting with a third party service but never actually claims the appropriate address from that service.
Chapter 16 covers Race Conditions, a vulnerability which involves two or more processes performing action based on conditions which should only permit one action to occur. However, a race condition vulnerability could permit it. Chapter 17 covers Insecure Direct Object Reference vulnerabilities whereby an attacker can read or update objections database records, files, etc which they should not have permission to.
Chapter 18 covers application logic based vulnerabilities. This chapter has grown into a catch all for vulnerabilities I consider linked to programming logic flaws. Chapter 19 covers the topic of how to get started. This chapter is meant to help you consider where and how to look for vulnerabilities as opposed to a step by step guide to hacking a site.
It is based on my experience and how I approach sites. Chapter 20 is arguably one of the most important book chapters as it provides advice on how to write an effective report. As such, I scoured some big name bounty paying companies for their advice on how best to report and got advice from HackerOne.
Make sure to pay close attention here. Chapter 21 switches gears. Here we dive into recommended hacking tools. The initial draft of this chapter was donated by Michiel Prins from HackerOne.
Chapter 22 is dedicated to helping you take your hacking to the next level. Here I walk you through some awesome resources for continuing to learn. Again, at the risk of sounding like a broken record, big thanks to Michiel Prins for contributing to the original list which started this chapter. Chapter 23 concludes the book and covers off some key terms you should know while hacking. Web Hacking is a self published book by Peter Yaworski.
I received a PDF copy for free when I registered as a bug bounty participant at hackerone. I recommend this book to anyone who wants to understand exactly how the world of bug bounties works and what the actual work is like. The book is pages of very concise information. It is rather condensed and assumes that the reader has a background in web development. Most of the book is a thorough introduction to the technical aspects of everything described in Chapter 19, called Getting Started.
That chapter and the following chapter on bug reports, are, combined with the first 15 pages, valuable insider information about how to navigate the world of bug bounties. Hacking Filip Holec whoami. This is a Leanpub book.
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