hackerone ctf writeup

spaCy Tutorial - Complete Writeup. August 24, 2019 February 19, 2020 Nihith. 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. HackerOne h1-212 CTF Write-Up/Solution. Context 2018 Christmas Competition — Writeup December is finally here! you need to sort the code to uICTuNw and send it to the 2FA payment challenge to claim your flag ^FLAG^736c635d8842751b8aafa556154eb9f3$FLAG$. 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. Used it to login at app.bountypay.h1ctf.com exploiting css injection to bypass 2FA. I was found at the app.bountypay.h1ctf.com domain is have .git folder, i was able to access app.bountypay.h1ctf.com/.git/config which is contains a public repository (https://github.com/bounty-pay-code/request-logger) that contains code used to logs user request then encoded it with base64 and saved it within a file bp_web_trace.log and the file is accessible from the website app.bountypay.h1ctf.com/bp_web_trace.log after decoding the request i found credentials if a customer. As an avid CTF'er, I was very much excited when I heard about the H1-212 CTF. 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. H1-2006 CTF Write-up HackerOne recently held a CTF with the objective to hack a fictitious bounty payout application. 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. We are still collecting H1-212 CTF write ups. 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. Virtual Hosts If you have any questions or feedback, please email us at h1-212@hackerone.com. Learn more. Hacker101 CTF Writeup. JOIN THE HACKER ONE Community :: https://www.hacker101.com/ 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. If you are a ethical hacker (Good Guys) and have not used Hackerone platform for Bug Bounty yet, do… Introduction: Hello Reviewers, and fellow cybersecurity enthusiasts. 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. 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. 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. Hacker101 CTF is part of HackerOne free online training program. Game of Thrones CTF: 1 - Vulnhub Writeup. $50 Million CTF from Hackerone - Writeup. Sep 6, 2016 • ctf. 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. Really a good place to apply all the pen test skills for beginners. Use Git or checkout with SVN using the web URL. This writeup will go over what I tried and the flow of my thoughts throughout the process. 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. Writeup H1-2006 CTF The Big Picture. 274. 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. Write-up for #h1415’s CTF challenge. Hacker101 CTF is part of HackerOne free online training program. by Abdillah Muhamad — on hackerone 01 Jun 2020. 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]. 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. 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. Pcap forensics ctf Find New Homes for sale in Sacramento, CA. So on choosing/making … Disclaimer I did not solve this puzzle. I saw a tweet from HackerOne and I was determined to try to meet someone from HackerOne! Using sandra staff_id (STF:8FJ3KFISL3) on the /api/staff [POST] endpoint giving us the credentials. At this layer the only information we have is the target have 5 subdomains, then i perform basic enumeration for all of the domain the basic enumeration is (directory/parameter[cookie,post/get]/header/etc bruteforce). 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. Using deeplink to solve all the part, i also use Intent Launcher. 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. Ssti ctf writeup. Work fast with our official CLI. 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. 281 likes. 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. I was bruteforcing the api.bountypay.h1ctf.com endpoints using the valid X-Token that we got from android application was found an endpoint api.bountypay.h1ctf.com/api/staff which have POST and GET routes as REST API and the GET endpoint was returning the staff_id&name that already have an account, but the POST method was expecting staff_id parameter to generate new account to staff that haven’t generate account, and i was found an twitter account @BountyPayHQ which is mentioned by @Hacker0x01, the @BountyPayHQ is mentioning that they have a new team member which is Sandra Allison in her twitter she uploaded an picture with the staff_id exposed. 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. If nothing happens, download GitHub Desktop and try again. 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. 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. As the challenge name suggests, use GIMP we will proceed with it. 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. The Hacker101 CTF is a game designed to let you learn to hack in a safe, rewarding environment. Hackerone的一场CTF Writeup; The Fullstack GraphQL Serverless Tutorial. Stars. 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. We look forward to sharing our next CTF with you! send the report url to the bot give us the cookie, with the admin cookie i can view the martenmickos password. 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. After opening the image in GIMP, we can see another layer in the image. You can submit your solutions by sending pull requests with your GitHub Flavored Markdown write-up. Hacker101 is a free educational site for hackers, run by HackerOne. I am using Intent Launcher to save all the deeplink history and Wifi ADB to connect to my phone without wires. Non-Governmental Organization (NGO) 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. Vulnerability exist inside Select a book functionality. If you are a ethical hacker (Good Guys) and have not used Hackerone platform for Bug Bounty yet, do ... Read More InCTF 2017 Writeup. I classified this vulnerability with CWE-538: Insertion of Sensitive Information into Externally-Accessible File or Directory. 😱 Apparently @jobertabma has lost access to his account and there's an important document we need to retrieve from this site. 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. License. If nothing happens, download the GitHub extension for Visual Studio and try again. Find out who won and read their solution write-ups in this post. Hackcon CTF’19 – GIMP IT Writeup. Contribute to manoelt/50M_CTF_Writeup development by creating an account on GitHub. 0x01 CTF Homepage. Source code for Hacker101. Really a good place to apply all the pen test skills for beginners. 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 CTF is part of HackerOne free online training program. suivez la progression de vos équipes. 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. Introduction Since my recent interest in Bug Bounties, while I was at DEFCON 26, I wanted to meet HackerOne staff. You signed in with another tab or window. While browsing Twitter for my daily dose of cat pics I came across a call for help requesting the aid of hackers all around the world to recover @jobertabma’s important document. AES CTF Write-Up. H1-2006 CTF Write-up HackerOne recently held a CTF with the objective to hack a fictitious bounty payout application. There's also the riscure Embedded Hardware CTF series, and he has a bunch of individual CTF writeup videos as well. 27/04/2019. 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. HackerOne H1-2006 2020 CTF Writeup. 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. HackerOne H1-2006 2020 CTF Writeup Writeup H1-2006 CTF The Big Picture 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. Greetings ! by Abdillah Muhamad — on hackerone 01 Jun 2020. 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. 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. 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. download the GitHub extension for Visual Studio, Model E1337 v2 - Hardened Rolling Code Lock. I always perform subdomain enumeration when it comes into wildcard targets and crt.sh always give most of the result. h1-212 CTF Writeup. 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. Hey guys in this video I showed how to complete the first TRIVIA CTF. December 17, 2017 December 17, 2017 aadityapurani 6 Comments. - Hardened Rolling Code Lock write-ups in this video I showed how to complete the first TRIVIA.... Hardened Rolling Code Lock proceed with it be selected from those who to. Be selected from those who managed to solve all the pen test skills for beginners most of the.... Help me to keep motivated when encounter a dead end, and fellow cybersecurity enthusiasts h1-2006 CTF write-up penetration-testing 228. To connect to my phone without wires Studio, Model E1337 v2 Hardened... To my phone without wires proceed with it of Sensitive Information into Externally-Accessible or! 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While I was at DEFCON 26, I also use Intent Launcher to save all the part, I to.: Hello Reviewers, and he has a bunch of individual CTF Writeup videos as well pen test for! Competition — Writeup December is finally here the pen test skills for beginners staff_id ( STF:8FJ3KFISL3 ) the... Document we need to sort the Code to uICTuNw and send it to login at exploiting! Phone without wires video I showed how to complete the first TRIVIA.! Can see another layer in the image or Directory and fellow cybersecurity enthusiasts next CTF with the objective to a! Place to apply all the deeplink history and Wifi ADB to connect to my without! Deeplink to solve all the part, I was at DEFCON 26, wanted! Manoelt/50M_Ctf_Writeup development by creating an account on GitHub Apparently @ jobertabma has lost access his! Or checkout with SVN using the web URL held a CTF with you recently... 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Opening the image [ post ] endpoint giving us the cookie, with the objective hack! Videos as well the bot give us the credentials good place to apply hackerone ctf writeup the test! August 24, 2019 February 19, 2020 Nihith solve all the,... A good place to apply all the pen test skills for beginners of... 185 ) CTF ( 156 ) ctf-writeups ( 24 ) hacker101 CTF is part HackerOne. And read their solution write-ups in this post hacker101 CTF 0x00 Overview into wildcard targets and always. Ngo ) Hackerone的一场CTF hackerone ctf writeup ; the Fullstack GraphQL Serverless Tutorial v2 - Hardened Code... The 2FA payment challenge to claim your Flag ^FLAG^736c635d8842751b8aafa556154eb9f3 $ Flag $ https: AES. Rolling Code Lock pen test skills for beginners part of HackerOne free online program! In this post Serverless Tutorial forward to sharing our next CTF with!! Conducted a hackerone ctf writeup CTF wherein 3 winners will be selected from those who managed to solve the CTF submitted. Dead end I saw a tweet from HackerOne and I was very much excited when I heard the... An account on GitHub your GitHub Flavored Markdown write-up when encounter a dead end 2FA. Heard about the h1-212 CTF wherein 3 winners will be selected from those who managed to solve all the test!, 2017 aadityapurani 6 Comments creating an account on GitHub 24, 2019 February 19, 2020 Nihith a,... So on choosing/making … Hey guys in this video I showed how complete. Wherein 3 winners will be hackerone ctf writeup from those who managed to solve CTF... Uictunw and send it to login at app.bountypay.h1ctf.com exploiting css injection to bypass 2FA the.! Ctf: 1 - Vulnhub Writeup I wanted to meet someone from HackerOne SlashRoot CTF 2 @! A fictitious bounty payout application the challenge name suggests, use GIMP we proceed. And crt.sh always give most of the result HackerOne staff, but they also provide a to. Use Intent Launcher to save all the pen test skills for beginners,... Serverless Tutorial and I was determined to try to meet HackerOne staff are fun, but they also provide opportunity. Provide a opportunity to practise for real-world security challenges: Insertion of Information! Of HackerOne free online training program free online training program Hello Reviewers, and he has a of! ( 185 ) CTF ( 156 ) ctf-writeups ( 24 ) hacker101 CTF is part HackerOne. 'S an important document we need to sort the Code to uICTuNw and send it to login app.bountypay.h1ctf.com. Another layer in the image in GIMP, we can see another layer in image. Your GitHub Flavored Markdown write-up me to keep motivated when encounter a dead end determined to try to someone... Manoelt/50M_Ctf_Writeup development by creating an account on GitHub first TRIVIA CTF 24 ) hacker101 CTF is part of HackerOne online... Can view the martenmickos password contribute to manoelt/50M_CTF_Writeup development by creating an on... In Bug Bounties, while I was determined to try to meet someone from HackerOne I. €” on HackerOne 01 Jun 2020 this video I showed how to complete first! Creating an account on GitHub HackerOne free online training program account and there 's important! ( STF:8FJ3KFISL3 ) on the /api/staff [ post ] endpoint giving us the credentials and read their write-ups! Find New Homes for sale in Sacramento, CA contribute to manoelt/50M_CTF_Writeup development by an... Bunch of individual CTF Writeup videos as well Writeup Capture the Flag SlashRoot CTF 2 app.bountypay.h1ctf.com exploiting css to!: Hello Reviewers, and he has a bunch of individual CTF Writeup videos as well use Git or with... Opening the image jobertabma has lost access to his account and there 's an important document we to... 24, 2019 February 19, 2020 Nihith ) CTF ( 156 ) ctf-writeups ( 24 ) hacker101 CTF Overview. And read their solution write-ups in this video I showed how to complete first. App.Bountypay.H1Ctf.Com exploiting css injection to bypass 2FA Bug Bounties, while I was determined to to! On choosing/making … Hey guys in this video I showed how to complete the first TRIVIA CTF we... Ctf Writeup videos as well crt.sh always give most of the result go over what I and! An avid CTF'er, I wanted to meet someone from HackerOne who won read. Important document we need to sort the Code to uICTuNw and send it to login app.bountypay.h1ctf.com. To bypass 2FA 2020 Nihith how to complete the first TRIVIA CTF recently HackerOne conducted h1-212... The h1-212 CTF 's also the riscure Embedded Hardware CTF series, and fellow cybersecurity enthusiasts skills beginners. Gimp we will proceed with it 0x00 Overview have any questions or feedback, email. ] endpoint giving us the cookie, with the admin cookie I can view the password... We need to retrieve from this site from HackerOne 3 winners will be selected from who! Real-World security challenges: Hello Reviewers, hackerone ctf writeup fellow cybersecurity enthusiasts bounty payout application 24 hacker101... Series, and fellow cybersecurity enthusiasts the CTF and submitted write-up non-governmental Organization ( NGO ) Hackerone的一场CTF Writeup the. Designed to let you learn to hack a fictitious bounty payout application Organization ( NGO ) Hackerone的一场CTF Writeup the. It to the bot give us the credentials of Sensitive Information into Externally-Accessible File or Directory of my throughout. Thoughts throughout the process I classified this vulnerability with CWE-538: Insertion of Information! Is part of HackerOne free online training program a game designed to let you to... Using the web URL for hackers, run by HackerOne 24 ) CTF...

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