Lab 5: Advanced Parameter Manipulation

IDOR with advanced parameter manipulation techniques

Difficulty: High

Lab Overview

This lab demonstrates advanced IDOR vulnerabilities using various parameter manipulation techniques. The application implements different methods of parameter handling that can be bypassed using creative manipulation techniques.

Objective: Use advanced parameter manipulation techniques to bypass IDOR protections and access unauthorized data.

Vulnerable PHP Code 
// Advanced parameter manipulation techniques
switch ($technique) {
    case 'basic':
        // Basic IDOR - direct parameter manipulation
        if ($param1 && isset($data_sources['users'][$param1])) {
            $data = $data_sources['users'][$param1];
        }
        break;
        
    case 'encoded':
        // Encoded parameter manipulation
        $decoded_param = base64_decode($param1);
        if ($decoded_param && isset($data_sources['users'][$decoded_param])) {
            $data = $data_sources['users'][$decoded_param];
        }
        break;
        
    case 'hash':
        // Hash-based parameter manipulation
        if ($param1) {
            $hash = md5($param1);
            // Simulate hash-based lookup
        }
        break;
        
    case 'json':
        // JSON parameter manipulation
        if ($param1) {
            $json_data = json_decode($param1, true);
            if ($json_data && isset($json_data['id'])) {
                $data = $data_sources['users'][$json_data['id']];
            }
        }
        break;
}
Advanced Parameter Manipulation
Hash IDOR - Report data loaded!
Quick Test URLs:
Manipulated Data: Hash Technique ADVANCED BYPASS
Manipulated Data
{
    "id": 1,
    "title": "Q1 Financial Report",
    "author_id": 3,
    "confidential": true
}
Vulnerability Details
  • Type: Advanced Insecure Direct Object Reference (IDOR)
  • Severity: Critical
  • Parameters: technique, param1, param2, param3
  • Method: GET
  • Issue: Advanced parameter manipulation without proper validation
Test Payloads by Technique

Basic: param1=1

Encoded: param1=MQ== (base64 encoded "1")

Array: param1=1¶m2=2

Hash: param1=1 (uses MD5 hash)

JSON: param1={"id":1}

Chained: param1=1¶m2=1¶m3=test

Bypass: param1=1%00 (null byte injection)

Quick Test URLs

Click these links to test different manipulation techniques:

Advanced Attack Scenarios
Advanced Mitigation Strategies
  • Implement multiple layers of validation and sanitization
  • Use whitelist-based validation instead of blacklists
  • Normalize and canonicalize input before validation
  • Implement proper parameter validation and restriction
  • Use least privilege principles
  • Implement proper error handling
  • Regular security testing and filter updates
  • Consider using a WAF (Web Application Firewall)
  • Implement network segmentation and access controls