{"id":134,"date":"2021-01-26T14:00:27","date_gmt":"2021-01-26T08:30:27","guid":{"rendered":"https:\/\/www.pethuraj.com\/blog\/?p=134"},"modified":"2021-03-28T01:46:52","modified_gmt":"2021-03-27T20:16:52","slug":"bmw-bugbounty-writeup","status":"publish","type":"post","link":"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/","title":{"rendered":"BMW Bug Bounty – Account Verification Bypass writeup"},"content":{"rendered":"\n

It all started with the BMW Security Experts Acknowledgment page, missing my name and I decided to give it a try.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

I started with the BMW security page and tested BMW Singapore website as per their policy and I picked https:\/\/accessbybmw.com.sg\/<\/u><\/a> domain as my target and quickly started the recon activity.<\/p>\n\n\n\n

So, this application has a lot of functionalities and an account registration and login page. To register for an account – I need to use a Singapore mobile number.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

So I picked a disposable mobile number (there are so many sites that offer these services) which lets us receive SMS when creating an account.<\/p>\n\n\n\n

I entered the mobile number and started to brute force the OTP and I understood that the OTP is four digits long with just only numerals.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

I captured the request in Burp suite and sent to the intruder to brute force the OTP with the payload type as four-digit numbers which ranged from 0000-9999.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

By analysing the Http response from the intruder tab \u2013 it was observed that the wrong OTP returns 400 status code.<\/p>\n\n\n\n

So, I filtered the status code which does not contain 4xx series of status codes.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Now I could see a request popping up in the intruder tab returning 200 status code as per the filter.<\/p>\n\n\n\n

By analyzing the response – I can see the OTP is accepted.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Upon entering the OTP in the browser – it got accepted.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Boom! So here comes the next step to provide with Email address field to continue with the registration process thus bypassing the Account verification.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

For reporting this security flaw to BMW – I\u2019m honoured on their Security Experts Acknowledgment page<\/strong>.<\/p>\n\n\n\n

You can find the acknowledgement here :<\/p>\n\n\n\n

https:\/\/www.bmwgroup.com\/en\/Security.html<\/a><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

You may like!<\/h2>\n\n\n
\"\"<\/a>\n

How to use Burp Suite Like a PRO? PART \u2013 2<\/a><\/h4>\n
Ready to level up your Burp Suite skills? In part 2, I've compiled some awesome tips and tricks to help ...
Read More<\/a><\/div><\/div><\/div><\/div>\n
\"burp<\/a>\n

How to use Burp Suite Like a PRO? PART – 1<\/a><\/h4>\n
This blog series is an advanced tutorial of the popular web application security and penetration testing tool Burp Suite,\u00a0to help ...
Read More<\/a><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

This writeup is about how I made into the BMW Security Experts Acknowledgment page by finding Account verification bypass flaw.<\/p>\n","protected":false},"author":1,"featured_media":156,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[5],"class_list":["post-134","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-bruteforce"],"yoast_head":"\nBMW Bug Bounty - Account Verification Bypass writeup - Pethuraj's Blog<\/title>\n<meta name=\"description\" content=\"This writeup is about how I made into the BMW Security Experts Acknowledgment page by finding Account verification bypass flaw.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"BMW Bug Bounty - Account Verification Bypass writeup\" \/>\n<meta property=\"og:description\" content=\"This writeup is about how I made into the BMW Security Experts Acknowledgment page by finding Account verification bypass flaw.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/\" \/>\n<meta property=\"og:site_name\" content=\"Pethuraj's Blog\" \/>\n<meta property=\"article:published_time\" content=\"2021-01-26T08:30:27+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-03-27T20:16:52+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2021\/01\/BMW-Bug-Bounty-Writeup.png\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"BMW Bug Bounty - Account Verification Bypass writeup\" \/>\n<meta name=\"twitter:description\" content=\"This writeup is about how I made into the BMW Security Experts Acknowledgment page by finding Account verification bypass flaw.\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2021\/01\/BMW-Bug-Bounty-Writeup.png\" \/>\n<meta name=\"twitter:creator\" content=\"@Pethuraj\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/bmw-bugbounty-writeup\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/bmw-bugbounty-writeup\\\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/#\\\/schema\\\/person\\\/6753ae21567c179c4592cb8ed33406aa\"},\"headline\":\"BMW Bug Bounty – Account Verification Bypass writeup\",\"datePublished\":\"2021-01-26T08:30:27+00:00\",\"dateModified\":\"2021-03-27T20:16:52+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/bmw-bugbounty-writeup\\\/\"},\"wordCount\":310,\"publisher\":{\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/bmw-bugbounty-writeup\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/01\\\/BMW-Bug-Bounty-Writeup.png\",\"keywords\":[\"BruteForce\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/bmw-bugbounty-writeup\\\/\",\"url\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/bmw-bugbounty-writeup\\\/\",\"name\":\"BMW Bug Bounty - Account Verification Bypass writeup - Pethuraj's Blog\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/bmw-bugbounty-writeup\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/bmw-bugbounty-writeup\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/01\\\/BMW-Bug-Bounty-Writeup.png\",\"datePublished\":\"2021-01-26T08:30:27+00:00\",\"dateModified\":\"2021-03-27T20:16:52+00:00\",\"description\":\"This writeup is about how I made into the BMW Security Experts Acknowledgment page by finding Account verification bypass flaw.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/bmw-bugbounty-writeup\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/bmw-bugbounty-writeup\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/bmw-bugbounty-writeup\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/01\\\/BMW-Bug-Bounty-Writeup.png\",\"contentUrl\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/01\\\/BMW-Bug-Bounty-Writeup.png\",\"width\":800,\"height\":400,\"caption\":\"BMW Bug Bounty Writeup\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/bmw-bugbounty-writeup\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"BMW Bug Bounty – Account Verification Bypass writeup\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/\",\"name\":\"Pethuraj's Blog\",\"description\":\"Bug Bounty Writeups\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/#organization\",\"name\":\"Pethuraj's Blog\",\"url\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/05\\\/pethuraj.png\",\"contentUrl\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/05\\\/pethuraj.png\",\"width\":949,\"height\":268,\"caption\":\"Pethuraj's Blog\"},\"image\":{\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/#\\\/schema\\\/person\\\/6753ae21567c179c4592cb8ed33406aa\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/62aeafbe8da471ade35eb14bbbac3f6c7206b2574d0889bd6b1128fb61ca5644?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/62aeafbe8da471ade35eb14bbbac3f6c7206b2574d0889bd6b1128fb61ca5644?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/62aeafbe8da471ade35eb14bbbac3f6c7206b2574d0889bd6b1128fb61ca5644?s=96&d=mm&r=g\",\"caption\":\"admin\"},\"sameAs\":[\"https:\\\/\\\/pethuraj.com\\\/blog\",\"https:\\\/\\\/www.linkedin.com\\\/in\\\/pethu\\\/\",\"https:\\\/\\\/x.com\\\/Pethuraj\"],\"url\":\"https:\\\/\\\/www.pethuraj.com\\\/blog\\\/author\\\/admin\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"BMW Bug Bounty - Account Verification Bypass writeup - Pethuraj's Blog","description":"This writeup is about how I made into the BMW Security Experts Acknowledgment page by finding Account verification bypass flaw.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/","og_locale":"en_US","og_type":"article","og_title":"BMW Bug Bounty - Account Verification Bypass writeup","og_description":"This writeup is about how I made into the BMW Security Experts Acknowledgment page by finding Account verification bypass flaw.","og_url":"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/","og_site_name":"Pethuraj's Blog","article_published_time":"2021-01-26T08:30:27+00:00","article_modified_time":"2021-03-27T20:16:52+00:00","og_image":[{"width":800,"height":400,"url":"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2021\/01\/BMW-Bug-Bounty-Writeup.png","type":"image\/png"}],"author":"admin","twitter_card":"summary_large_image","twitter_title":"BMW Bug Bounty - Account Verification Bypass writeup","twitter_description":"This writeup is about how I made into the BMW Security Experts Acknowledgment page by finding Account verification bypass flaw.","twitter_image":"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2021\/01\/BMW-Bug-Bounty-Writeup.png","twitter_creator":"@Pethuraj","twitter_misc":{"Written by":"admin","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/#article","isPartOf":{"@id":"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/"},"author":{"name":"admin","@id":"https:\/\/www.pethuraj.com\/blog\/#\/schema\/person\/6753ae21567c179c4592cb8ed33406aa"},"headline":"BMW Bug Bounty – Account Verification Bypass writeup","datePublished":"2021-01-26T08:30:27+00:00","dateModified":"2021-03-27T20:16:52+00:00","mainEntityOfPage":{"@id":"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/"},"wordCount":310,"publisher":{"@id":"https:\/\/www.pethuraj.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/#primaryimage"},"thumbnailUrl":"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2021\/01\/BMW-Bug-Bounty-Writeup.png","keywords":["BruteForce"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/","url":"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/","name":"BMW Bug Bounty - Account Verification Bypass writeup - Pethuraj's Blog","isPartOf":{"@id":"https:\/\/www.pethuraj.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/#primaryimage"},"image":{"@id":"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/#primaryimage"},"thumbnailUrl":"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2021\/01\/BMW-Bug-Bounty-Writeup.png","datePublished":"2021-01-26T08:30:27+00:00","dateModified":"2021-03-27T20:16:52+00:00","description":"This writeup is about how I made into the BMW Security Experts Acknowledgment page by finding Account verification bypass flaw.","breadcrumb":{"@id":"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/#primaryimage","url":"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2021\/01\/BMW-Bug-Bounty-Writeup.png","contentUrl":"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2021\/01\/BMW-Bug-Bounty-Writeup.png","width":800,"height":400,"caption":"BMW Bug Bounty Writeup"},{"@type":"BreadcrumbList","@id":"https:\/\/www.pethuraj.com\/blog\/bmw-bugbounty-writeup\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.pethuraj.com\/blog\/"},{"@type":"ListItem","position":2,"name":"BMW Bug Bounty – Account Verification Bypass writeup"}]},{"@type":"WebSite","@id":"https:\/\/www.pethuraj.com\/blog\/#website","url":"https:\/\/www.pethuraj.com\/blog\/","name":"Pethuraj's Blog","description":"Bug Bounty Writeups","publisher":{"@id":"https:\/\/www.pethuraj.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.pethuraj.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.pethuraj.com\/blog\/#organization","name":"Pethuraj's Blog","url":"https:\/\/www.pethuraj.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.pethuraj.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2021\/05\/pethuraj.png","contentUrl":"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2021\/05\/pethuraj.png","width":949,"height":268,"caption":"Pethuraj's Blog"},"image":{"@id":"https:\/\/www.pethuraj.com\/blog\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.pethuraj.com\/blog\/#\/schema\/person\/6753ae21567c179c4592cb8ed33406aa","name":"admin","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/62aeafbe8da471ade35eb14bbbac3f6c7206b2574d0889bd6b1128fb61ca5644?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/62aeafbe8da471ade35eb14bbbac3f6c7206b2574d0889bd6b1128fb61ca5644?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/62aeafbe8da471ade35eb14bbbac3f6c7206b2574d0889bd6b1128fb61ca5644?s=96&d=mm&r=g","caption":"admin"},"sameAs":["https:\/\/pethuraj.com\/blog","https:\/\/www.linkedin.com\/in\/pethu\/","https:\/\/x.com\/Pethuraj"],"url":"https:\/\/www.pethuraj.com\/blog\/author\/admin\/"}]}},"_links":{"self":[{"href":"https:\/\/www.pethuraj.com\/blog\/wp-json\/wp\/v2\/posts\/134","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pethuraj.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pethuraj.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pethuraj.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pethuraj.com\/blog\/wp-json\/wp\/v2\/comments?post=134"}],"version-history":[{"count":16,"href":"https:\/\/www.pethuraj.com\/blog\/wp-json\/wp\/v2\/posts\/134\/revisions"}],"predecessor-version":[{"id":166,"href":"https:\/\/www.pethuraj.com\/blog\/wp-json\/wp\/v2\/posts\/134\/revisions\/166"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pethuraj.com\/blog\/wp-json\/wp\/v2\/media\/156"}],"wp:attachment":[{"href":"https:\/\/www.pethuraj.com\/blog\/wp-json\/wp\/v2\/media?parent=134"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pethuraj.com\/blog\/wp-json\/wp\/v2\/categories?post=134"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pethuraj.com\/blog\/wp-json\/wp\/v2\/tags?post=134"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}