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HowToHunt
  • HowToHunt.md
  • API Testing
    • Hidden API Functionality Exposure
    • Reverse Engineer an API
  • Account Takeover Methodology
    • Account Takeover Methodology
  • Application Level DoS
    • Application Level DoS Methods
  • Authentication Bypass
    • 2FA Bypasses
    • OTP Bypass
    • Account Ban Bypass
  • Broken-Link Hijacking
    • Broken-Link Hijacking
  • Broken Auth And Session Management
    • Session Based Bugs
  • CMS
    • AEM
    • Drupal
    • Wordpress
    • Moodle
  • CORS
    • CORS
    • CORS Bypasses
  • CSRF
    • CSRF
    • CSRF MindMap
    • CSRF Bypass
  • Finding CVEs
    • CVES
  • CheckList
    • Web Application Pentesting Checklist
    • Web Checklist by Chintan Gurjar.pdf
    • Web Checklist by Tushra Verma.pdf
    • Mindmap by Rohit Gautam
    • Mindmap by Cristian Cornea
  • Web Page Source Code Review
    • Web Page Code Review Tips
  • EXIF Geo Data Not Stripped
    • EXIF Geo Data Not Stripped
  • File Upload Bypass
    • File Upload Bypass
  • Find Origin IP
    • Find Origin
  • GraphQL
    • GraphQL
  • HTTP Desync Attack
    • HTTP_Desync
  • Host-Header Attack
    • Host-Header
  • HTML-Injection
    • HTML-Injection
  • IDOR
    • IDOR
  • JWT ATTACK
    • JWT
  • JIRA ATTACK
    • JIRA
  • MFA Bypass
    • MFA Bypasses
    • 2FA-Bypass
  • Misconfigurations
    • Default Credential And Admin Panel
    • Docker
    • S3 Bucket
  • OAuth
    • OAuth
    • OAuth Hunting
  • Open Redirection
    • Find OpenRedirect Trick
    • Open Redirection Bypass
  • Parameter Pollution
    • Parameter Pollution In Social Sharing Buttons
  • Password Reset Functionality
    • MindMap
    • Password Reset Token Leakage
    • Account_Takeover_By_Password_Reset_Functionality
    • Password_Reset_Flaws
  • Rate Limit
    • Rate Limit Flaws
    • Rate-Limit Bypass
    • No Rate-Limit on Verify-PhoneNo
    • No Rate-limit on Invite User
    • No Rate-limit on Promo
    • No Rate-limit on Verify-email
    • No Rate-limit on forget-password
  • Race Condition
    • Race Condition
  • Recon
    • Github
    • Recon Workflow
    • Subdomain Enumeration
  • SQLi
    • SQL Injection.md
  • SAML
    • SAML
  • SSRF
    • SSRF
    • Blind SSRF
  • SSTI
    • SSTI
  • Sign Up Functionality
    • Sign Up Bugs
    • Sign Up MindMap
  • Sensitive Info Leaks
    • Github Recon Method
    • Github-Dorks
    • Github Dorks All
    • Google Dorks
    • Shodan CVE Dorks
    • Version Leaks
  • Status Code Bypass
    • Status_Code_Bypass Tips
    • 403 Bypass
  • Subdomain Takeover
    • Subdomain Takeover - Detail Method
    • Subdomain Takeover - Easy Method
    • Subs or Top level Domain
  • Tabnabbing
    • Tabnabbing
  • WAF Bypasses
    • WAF Bypass Using Headers
  • Weak Password Policy
    • Weak Password Policy
  • XSS
    • XSS
    • Bypass CSP
    • XSS Bypass
    • Automated XSS
    • Post Message Xss
  • XXE
    • XXE Methods
    • Billion Laugh Attack
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  1. MFA Bypass

2FA-Bypass

  • 1:- Password Reset Disable 2FA

  • 2:- No Rate limit

  • 3:- Sending all alphabets instead of number

  • 4:- Status Code Manipulation

  • 5:- 2FA bypass by substituting part of the request from the session of another account.

    If a parameter with a specific value is sent to verify the code in the request, try sending the value from the request of another account.
    
    For example, when sending an OTP code, the form ID/user ID or cookie is checked, which is associated with sending the code. If we apply the data from the parameters of the account on which you want to bypass code verification (Account 1) to a session of a completely different account (Account 2), receive the code and enter it on the second account, then we can bypass the protection on the first account. After reloading the page, 2FA should disappear.
  • 6:- Bypass 2FA using the “memorization” functionality.

    Many sites that support 2FA, have a “remember me” functionality. It is useful when the user doesn’t want to enter a 2FA code on subsequent login windows. And it is important to identify the way in which 2FA is “remembered”. This can be a cookie, a value in session/local storage, or simply attaching 2FA to an IP address.

  • 7:- OTP Leakage in Response

  • 8:- Bypassing 2fa Via OAuth mechanism ( Mostly not Applicable one )

    Site.com requests Facebook for OAuth token > Facebook verifies user account > Facebook send callback code > Site.com logs a user in (Rare case)

  • 9:- Bypassing 2fa using response manipulation

    Enter correct OTP -> Intercept & capture the response -> logout -> enter wrong OTP -> Intercept & change the response with successful previous response -> logged in
  • 10:- CSRF on 2FA Disable Feature.

    Signup for two account -> Login into attacker account & capture the disable 2FA request -> generate CSRF POC with .HTML extension -> Login into victim account and fire the request — — -> It disable 2FA which leads to 2FA Bypass.
  • 11:- Bypass 2FA by Adding null or 000000

  • 12:- Bypass 2FA by Batch API request

    Suppose if 2FA parameter like "code" of "OTP" is going with the request, add same parameter into the request multiple times like BATCH Mode for REST APi.
  • https://twitter.com/FaniMalikHack/status/1395042756108505092

  • https://twitter.com/FaniMalikHack/status/1402627994833805313

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Last updated 1 year ago

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Fani Malik