Portswigger
  • Portswigger
  • Server-Side Request Forgery
    • Server-Side Request Forgery (SSRF)
  • SSRF with filter bypass via open redirection vulnerability
  • Blind SSRF with out-of-band detection
  • Cross-Site Scripting
    • Cross-Site Scripting (XSS)
  • Reflected XSS into a JS string with angle brackets and double&single quotes HTML-encoded escape
  • XSS into a template literal w/ angle brackets, single, double quotes, backslash & backticks Escaped
  • Authentication
    • Authentication
  • Username enumeration via subtly different responses
  • 2FA broken logic
  • Username enumeration via response timing
  • Username enumeration via account lock
  • Password reset poisoning via middleware
  • Path Traversal
    • Path Traversal
  • File path traversal, traversal sequences stripped with superfluous URL-decode
  • File path traversal, traversal sequences blocked with absolute path bypass
  • Business Logic Vulnerabilities
    • Business Logic Vulnerabilities
  • Insufficient workflow validation
  • Inconsistent handling of exceptional input
  • Server-Side Template Injection
    • Server-Side Template Injection
  • Basic server-side template injection
  • Basic server-side template injection (code context)
  • SQL Injection
    • SQL Injection
    • Blind SQL injection with conditional responses
  • SQL injection UNION attack, retrieving data from other tables
  • SQL injection attack, listing the database contents on non-Oracle databases
  • API Testing
    • API Testing
  • Exploiting an API endpoint using documentation
  • Exploiting a mass assignment vulnerability
  • Finding and exploiting an unused API endpoint
  • JWT ATTACK
    • JWT Attack
    • JWT authentication bypass via unverified signature
  • JWT authentication bypass via jku header injection
  • JWT authentication bypass via flawed signature verification
  • HTTP HOST HEADER ATTACKS
    • HTTP Host header attacks
  • Basic password reset poisoning
  • Host header authentication bypass
  • No SQL Injection
    • NoSQL Injection
  • Detecting NoSQL injection
  • Exploiting NoSQL operator injection to bypass authentication
  • Exploiting NoSQL injection to extract data
  • FILE UPLOAD VULNERABILITIES
    • File Upload Vulnerabilities
  • Web shell upload via obfuscated file extension
  • OAuth Authentication
    • OAuth Authentication
  • OAuth account hijacking via redirect_uri
  • ACCESS CONTROL VULNERABILITIES
    • Access Control Vulnerabilities
  • User ID controlled by request parameter with data leakage in redirect
  • User ID controlled by request parameter with password disclosure
  • User role controlled by request parameter
  • User role can be modified in user profile
  • URL-based access control can be circumvented
  • INFORMATION DISCLOSURE VULNERABILITIES
    • Information Disclosure Vulnerabilities
  • Information disclosure in version control history
  • XML external entity injection
    • XML External Entity (XXE) Injection
  • Exploiting XXE using external entities to retrieve files
  • Exploiting blind XXE to retrieve data via error messages
  • Blind XXE with out-of-band interaction
  • Blind XXE with out-of-band interaction via XML parameter entities
  • OS COMMAND INJECTION
    • OS Command Injection
  • Blind OS command injection with out-of-band data exfiltration
  • PROTOTYPE POLLUTION
    • Prototype Pollution
  • Privilege escalation via server-side prototype pollution
  • WEB CACHE POISONING
    • Web Cache Poisoning
  • Web cache poisoning via an unkeyed query parameter
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URL-based access control can be circumvented

Link: https://portswigger.net/web-security/access-control/lab-url-based-access-control-can-be-circumvented

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Last updated 3 months ago

Description:

This website has an unauthenticated admin panel at /admin, but a front-end system has been configured to block external access to that path. However, the back-end application is built on a framework that supports the X-Original-URL header.

To solve the lab, access the admin panel and delete the user carlos.

Proof of concept:

  1. Analisa web target

  2. Dari hasil analisa terdapat navigasi untuk mengarahkan kehalaman Admin panel, namun ketika diakses terdapat pesan Access denied

  3. Seperti yang telah dijelaskan pada deskripsi lab, pada target ini support terhadap X-Original-Url. X-Original-Url merupakan header HTTP yang menunjukkan URL asli dari suatu sumber daya sebelum diubah atau dialihkan. Maka dari itu, dengan parameter header HTTP tersebut bisa dicoba untuk melakukan eksploitasi bypass access control. Caranya, tambahkan HTTP header X-Original-Url tersebut menggunakan burp suite repeater arahkan ke endpoint yang tidak dapat diakses yaitu endpoint /admin

  4. Terlihat, isi dari halaman yang terdapat di endpoint /admin diantaranya adalah fitur untuk menghapus pengguna yang terdaftar yang diarahkan ke endpoint /admin/delete?username=

  5. Untuk menyelesaikan tangtangan lab ini, diharuskan untuk menghapus user carlos . Maka dari itu untuk nilai X-Original-Url arahkan ke endpoint delete user yaitu /admin/delete dan untuk endpointnya ubah menjadi /?username=carlos karena user yang akan dihapus adalah user dengan username carlos

  6. Maka user carlos berhasil dihapus dan tantangan lab ini telah terselesaikan

Thanks, Stay Ethical & Happy Hacking! 🍻