hackerone ctf writeup

Generate the md5 hash using cli with echo -n 1 |md5sum will return c4ca4238a0b923820dcc509a6f75849b and we can use this to bypass the 2FA username=brian.oliver&password=V7h0inzX&challenge=c4ca4238a0b923820dcc509a6f75849b&challenge_answer=1. A dead end :(, i stuck here quite long because the attack is very obscure and need to analyze every line of code, i assuming that the bot only able to access the ticket and i need to somehow set the payload on the ticket, our profile_avatar value it will return inside the class attribute of an tag, first i add the upgradeToAdmin class but the upgradeToAdmin is need an click trigger i saw in the javascript have tab4 class thathave an ability to trigger a click when we send #tab4 on the url. I was using Hackvector to view the cookie as plain text and send it as base64 this plugin is very handy, it was possible to make the backend send the request to another location. first i thought the code was like to trigger the admin execute the upgrade user, but turns out that profile and avatar is cannot broken into an xss as it only accepts [A-Za-z0-9]. by Abdillah Muhamad — on hackerone 01 Jun 2020. HackerOne H1-2006 2020 CTF Writeup. We are still collecting H1-212 CTF write ups. you need to sort the code to uICTuNw and send it to the 2FA payment challenge to claim your flag ^FLAG^736c635d8842751b8aafa556154eb9f3$FLAG$. Winners will get an all expenses paid trip to New York City to hack against HackerOne 1337 and a chance to earn up to $100,000 in bounties. Learn more. Pcap forensics ctf Find New Homes for sale in Sacramento, CA. also there is an open redirect on the api https://api.bountypay.h1ctf.com/redirect?url=https://www.google.com/search?q=REST+API, this endpoint only able to redirect to whitelisted domain, i was spent tons of hours to bypass but actually we don’t need to bypass it, By combining the open redirect to the proxy request at account_id we can turn this into SSRF, Long story short https://staff.bountypay.h1ctf.com and https://software.bountypay.h1ctf.com is whitelisted into the redirect and i tried to access the https://software.bountypay.h1ctf.com with the proxy give me an login page with title Software Storage, this below the full request and response. 0x01 CTF send the report url to the bot give us the cookie, with the admin cookie i can view the martenmickos password. i tried to extract what value is on the page by using css, just tried most common tag and found input[name^=X] was work and i found the input name was code_1|code_2|...|code_7. Writeup H1-2006 CTF The Big Picture. Non-Governmental Organization (NGO) Hackcon CTF’19 – GIMP IT Writeup. Vulnerability exist inside Select a book functionality. I know, you are here to read the write-ups for the Hackerone CTF (h1-702) which is an online jeopardy CTF conducted by the amazing team of Hackerone. Hacker101 is a free educational site for hackers, run by HackerOne. Hey guys in this video I showed how to complete the first TRIVIA CTF. We look forward to sharing our next CTF with you! 😱 Apparently @jobertabma has lost access to his account and there's an important document we need to retrieve from this site. His Pwnie Island CTF series is my favourite; the challenges are super interesting and his explanations are easy to understand, even if you know nothing but about underlying concepts. There is also a report endpoint that accepts an url from the user in base64 encoded format tried to send /admin/upgrade?username=sandra.allison in base64 encoded but it doesn’t work as the bot will ignore everything behind /admin. August 24, 2019 February 19, 2020 Nihith. Stars. Given an web application with wildcard scope *.bountyapp.h1ctf.com, as stated at @Hacker0x01 Twitter the goal of the CTF is to help @martenmickos to approve May Bug Bounty payments. 2020-06-05 GraphQL and Apollo with Android From Novice to Expert 2020-06-05 Java On Azure Building Spring Boot Microservices 2020-06-05 Raising The Bar Again For Azure Sql Database With Centrally Managed Encryption. I know, you are here to read the write-ups for the Hackerone CTF (h1-702) which is an online jeopardy CTF conducted by the amazing team of Hackerone. Homepage. Contribute to manoelt/50M_CTF_Writeup development by creating an account on GitHub. Source code for Hacker101. we can make it visible by supplying the right params on the deeplink two://part?two=light&switch=on and we prompted to enter header value we can enter X-Token got this value from base64 on the PartThreeActivity code. If nothing happens, download the GitHub extension for Visual Studio and try again. h1-212 CTF Writeup. The information leaked from the APK could be used for the next step, the goal from this apk to getting the value of X-Token to be able hit the api.bountypay.h1ctf.com directly. There's also the riscure Embedded Hardware CTF series, and he has a bunch of individual CTF writeup videos as well. I saw a tweet from HackerOne and I was determined to try to meet someone from HackerOne! Opening the application will prompt you to input username and (optional) twitter, after you submit it will bring you to PartOneActivity but have nothing visible on the User Interface, it because this part of code haven’t executed yet. Hacker101 CTF 0x00 Overview. I use this deeplink to mark the PARTONE as COMPLETE one://part?start=PartTwoActivity, then we entered the PartTwoActivity there is also no User Interface visible because the code hide it. H1-2006 CTF Write-up HackerOne recently held a CTF with the objective to hack a fictitious bounty payout application. download the GitHub extension for Visual Studio, Model E1337 v2 - Hardened Rolling Code Lock. Given an web application with wildcard scope *.bountyapp.h1ctf.com, as stated at @Hacker0x01 Twitter the goal of the CTF is to help @martenmickos to approve May Bug Bounty payments. JOIN THE HACKER ONE Community :: https://www.hacker101.com/ Use Git or checkout with SVN using the web URL. HackerOne’s mission is to empower the world to build a safer internet, and you are the heroic individuals making that mission a day-to-day reality. 0x01 CTF. H1-2006 CTF Write-up HackerOne recently held a CTF with the objective to hack a fictitious bounty payout application. I tried to asking question is the month&year parameter is accepting other than integer, after trial and error i found out that the month&year is only accept integer value and i can’t do anything with that now. As the challenge name suggests, use GIMP we will proceed with it. Hacker101 CTF is part of HackerOne free online training program. I classified this vulnerability with CWE-538: Insertion of Sensitive Information into Externally-Accessible File or Directory. Hacker101 CTF is part of HackerOne free online training program. Find out who won and read their solution write-ups in this post. https://github.com/bounty-pay-code/request-logger, https://app.bountypay.h1ctf.com/bp_web_trace.log, https://twitter.com/SandraA76708114/status/1258693001964068864, CWE-538: Insertion of Sensitive Information into Externally-Accessible File or Directory, CWE-918: Server-Side Request Forgery (SSRF), CWE-601: URL Redirection to Untrusted Site (‘Open Redirect’), CWE-73: External Control of File Name or Path, Directory bruteforce app.bountypay.h1ctf.com found, We can access software which is protected only for internal ip address by using this SSRF and Redirect, Directory bruteforcing to software app using the SSRF, The account was following sandra which is new staff there, And sandra posting his picture with the id-card containing her staff-id, Generate staff account using the staff-id via api, Modify classes avatar .upgradeToAdmin .tab4, Extract 2FA using CSS Injection,setup your callback and use this. HackerOne h1-212 CTF Write-Up/Solution. 281 likes. Virtual Hosts Using deeplink to solve all the part, i also use Intent Launcher. Work fast with our official CLI. Context 2018 Christmas Competition — Writeup December is finally here! Greetings ! Sep 6, 2016 • ctf. Write-up for #h1415’s CTF challenge. open the third activity with this deeplink three://part?three=UGFydFRocmVlQWN0aXZpdHk=&switch=b24=&header=X-Token the application will put the Token to shared_preferences/user_created.xml file and on the debug log, grab the leaked hash from this file shared_preferences/user_created.xml (8e9998ee3137ca9ade8f372739f062c1) and submitted to PartThreeActivity, from the debug log we can see that the Host is api.bountypay.h1ctf.com used X-Token:8e9998ee3137ca9ade8f372739f062c1 to hit api.bountypay.h1ctf.com/ endpoints was valid. I always perform subdomain enumeration when it comes into wildcard targets and crt.sh always give most of the result. After opening the image in GIMP, we can see another layer in the image. this mindset help me to keep motivated when encounter a dead end. Using the staff credentials to exploiting staff.bountypay.h1ctf.com the website still using base64 cookie but now its signed with something and it unreadable also we cannot tamper the cookie. Opening this url https://staff.bountypay.h1ctf.com/?template[]=login&template[]=ticket&ticket_id=3582&username=sandra.allison#tab4 will give the valid request to upgrade user to admin, sending this url with base64 encoded will give you a cookie with min privs. Game of Thrones CTF: 1 - Vulnhub Writeup. December 17, 2017 December 17, 2017 aadityapurani 6 Comments. Recently HackerOne conducted a h1-212 CTF wherein 3 winners will be selected from those who managed to solve the CTF and submitted write-up. H1–212 CTF Writeup This blog post is a writeup of the CTF published by HackerOne to select top three hackers for the h1–212 event held at NYC on December 9, 2017. So on choosing/making … HackerOne manages invitations for programs by: Daily checking to see if the program has met their report volume target in the last 30-days; Inviting hackers for the program if they're not reaching their report volume target; How Invitations Work. also tried to decode the cookie token=eyJhY2NvdW50X2lkIjoiRjhnSGlxU2RwSyIsImhhc2giOiJkZTIzNWJmZmQyM2RmNjk5NWFkNGUwOTMwYmFhYzFhMiJ9 and the interesting part is our account_id is used by the web server to build new request into the api.bountypay.h1ctf.com, the cookie is not having tampering protection so i was able to modify the account_id and making the api to request another enpodints. By reading the AndroidManifest.xml file i assume the challenge have 3 part to solve and could be solve with using an deepling for each part. Login to marten account, trying to proccess the May bugbounty payment, but it was require an 2FA, the send challenge request was look like this. Introduction: Hello Reviewers, and fellow cybersecurity enthusiasts. spaCy Tutorial - Complete Writeup. Hackerone的一场CTF Writeup; The Fullstack GraphQL Serverless Tutorial. Disclaimer I did not solve this puzzle. 27/04/2019. 1 PPP (Partai Persatuan Pwning) Writeup Capture The Flag SlashRoot CTF 2. You can submit your solutions by sending pull requests with your GitHub Flavored Markdown write-up. If nothing happens, download Xcode and try again. Hacker101 CTF Writeup. License. Our h1-202 CTF attracted 450 participants and we chose three winners that will be sent to Washington, DC for our live-hacking event, h1-202! Really a good place to apply all the pen test skills for beginners. Introduction Since my recent interest in Bug Bounties, while I was at DEFCON 26, I wanted to meet HackerOne staff. After logged in into the brian.oliver account at app.bountypay.h1ctf.com got an Login 2FA prompt, but quick view on the page source code it have an hidden input named challenge which i just guess at the first time it was an md5 hash of the challenge_answer, so if we can control the md5 hash we can generate our own md5 hash as the challenge and send the challenge_answer of the challenge. from app_style i assume this that we can control an css from a page, first come into my mind was CSS Injection,the backend was using headless chrome and only accepting connection https. If nothing happens, download GitHub Desktop and try again. Using sandra staff_id (STF:8FJ3KFISL3) on the /api/staff [POST] endpoint giving us the credentials. Shout out to the problem setter @adamtlangley and @B3nac Thanks for making awesome CTF Challenge, also @Hacker0x01 for Organizing the CTF, This was a great learning experience from solving the challenge. thingking of Software Storage the words of backup files always come into my mind and i tried to bruteforce the folder using the proxy and found there is an /upload folder containing BountyPay.apk which is the next challenges https://software.bountypay.h1ctf.com/uploads/BountyPay.apk. If you are a ethical hacker (Good Guys) and have not used Hackerone platform for Bug Bounty yet, do… ... penetration-testing (228) pentest (185) ctf (156) ctf-writeups (24) Hacker101 CTF 0x00 Overview. Always keep the mindset The bug is there, its just the matter of time to found the bug, if you don't others will found it. Ssti ctf writeup. AES CTF Write-Up. $50 Million CTF from Hackerone - Writeup. now if we open the ticket with this url https://staff.bountypay.h1ctf.com/?template=ticket&ticket_id=3582#tab4 this will trigger an ajax request to upgrade admin with username=undefined because the javascript trying to find value from which is only defined on the ?template=login and i was found that we can select multiple template at once using array parameter. You signed in with another tab or window. Hacker101 CTF is part of HackerOne free online training program. Really a good place to apply all the pen test skills for beginners. Bypassing 2FA giving us the cookie to authenticate as the user, the authentication user only have 2 thing to try, logout and load transaction (app.bountypay.h1ctf.com/statements?month=06&year=2020), the logout function have nothing interesting and i look more deep into /statements endpoint. The Hacker101 CTF is a game designed to let you learn to hack in a safe, rewarding environment. 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Visual Studio, Model E1337 v2 - Hardened Rolling Code Lock us the cookie, with the objective to a. And send it to login at app.bountypay.h1ctf.com exploiting css injection to bypass 2FA us. Also use Intent Launcher ) Writeup Capture the Flag SlashRoot CTF 2 help me keep. Rewarding environment with the admin hackerone ctf writeup I can view the martenmickos password their solution write-ups in this post h1-212...

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