| name | Pentesting from Beginner to Advanced |
| description | The assistant provides a structured web application penetration testing learning path from fundamentals to advanced techniques. Activate when users ask about "learning pentesting," "web security training," "OWASP vulnerabilities," "BurpSuite tutorial," "penetration testing roadmap," or "web app security course."
|
| version | 1.0.0 |
| tags | ["training","web-security","owasp","burpsuite","learning-path"] |
Pentesting from Beginner to Advanced
Purpose
Provide a structured learning path for web application penetration testing, progressing from foundational concepts through advanced exploitation techniques. Guide learners through each phase of the web security assessment process.
Inputs/Prerequisites
- Basic computer and networking knowledge
- Kali Linux or security-focused OS
- BurpSuite installed and configured
- Lab environment (bWAPP, DVWA, or similar)
- Web browser with developer tools
Outputs/Deliverables
- Foundational web security knowledge
- Practical exploitation skills
- Understanding of OWASP Top 10
- Ability to conduct web application assessments
- Vulnerability identification and reporting skills
Core Workflow
Phase 1: History and Fundamentals
Understanding the Internet:
- Learn how the internet was developed
- Understand client-server architecture
- Grasp basic web communication models
Key Concepts:
- HTTP protocol fundamentals
- Request/response structure
- Client vs server-side processing
Phase 2: Web and Server Technology
HTTP Protocol Basics:
HTTP Request Structure:
GET /page HTTP/1.1
Host: example.com
User-Agent: Mozilla/5.0
Accept: text/html
Cookie: session=abc123
HTTP Response Structure:
HTTP/1.1 200 OK
Content-Type: text/html
Set-Cookie: session=xyz789
<html>...</html>
Essential Concepts:
| Topic | Description |
|---|
| HTTP Methods | GET, POST, PUT, DELETE, OPTIONS |
| Status Codes | 200 OK, 301 Redirect, 403 Forbidden, 404 Not Found, 500 Error |
| Headers | Request and response metadata |
| Cookies | Session management, tracking |
| Sessions | Server-side state management |
| URLs | Structure and parameters |
| REST APIs | Resource-based web services |
Encoding Types:
Space -> %20
< -> %3C
> -> %3E
" -> %22
# HTML Encoding
< -> <
> -> >
& -> &
# Base64 Encoding
echo "text" | base64
echo "dGV4dAo=" | base64 -d
Phase 3: Lab Setup with BurpSuite
Install BurpSuite:
Configure Browser:
- Set proxy to 127.0.0.1:8080
- Import BurpSuite CA certificate
- Disable certificate validation for testing
BurpSuite Modules:
| Module | Purpose |
|---|
| Proxy | Intercept and modify traffic |
| Repeater | Manually modify and resend requests |
| Intruder | Automated attacks and fuzzing |
| Scanner | Automated vulnerability detection |
| Decoder | Encode/decode data |
| Comparer | Compare responses |
| Sequencer | Analyze session token randomness |
Set Up Practice Lab:
apt install docker.io
docker run -d -p 80:80 raesene/bwapp
docker run -d -p 80:80 vulnerables/web-dvwa
Phase 4: Application Mapping
Discovery Techniques:
curl http://target/robots.txt
gobuster dir -u http://target -w /usr/share/wordlists/dirb/common.txt
dirbuster -u http://target -l /usr/share/wordlists/dirb/common.txt
Entry Point Identification:
- Forms and input fields
- URL parameters
- Hidden fields
- Cookies
- HTTP headers
Technology Fingerprinting:
whatweb http://target
nmap -sV --script http-enum target
curl -I http://target
Phase 5: OWASP Top 10 Vulnerabilities
1. Injection (A03:2021)
' OR 1=1--
" OR ""="
'; DROP TABLE users;--
; ls -la
| cat /etc/passwd
&& whoami
*)(uid=*))(|(uid=*
2. Broken Authentication (A07:2021)
- Weak passwords
- Session fixation
- Credential stuffing
- Missing MFA
- Insecure password recovery
3. Cross-Site Scripting (A03:2021)
<script>alert('XSS')</script>
<img src=x onerror="alert('XSS')">
<svg onload="alert('XSS')">
<ScRiPt>alert('XSS')</ScRiPt>
<img src="x" onerror="alert('XSS')">
4. Insecure Direct Object Reference (A01:2021)
# IDOR Examples
/api/user/123 -> /api/user/124
/download?id=1 -> /download?id=2
/invoice/10001 -> /invoice/10002
5. Security Misconfiguration (A05:2021)
- Default credentials
- Unnecessary features enabled
- Error messages revealing info
- Missing security headers
- Outdated software
6. Sensitive Data Exposure (A02:2021)
- Unencrypted transmission
- Weak encryption
- Exposed API keys
- Hardcoded credentials
- Information in error messages
7. Missing Access Controls (A01:2021)
- Horizontal privilege escalation
- Vertical privilege escalation
- Forced browsing to admin pages
- API without authentication
8. Cross-Site Request Forgery (A01:2021)
<form action="http://target/transfer" method="POST">
<input type="hidden" name="amount" value="10000">
<input type="hidden" name="to" value="attacker">
<input type="submit" value="Click Me!">
</form>
9. Components with Known Vulnerabilities (A06:2021)
searchsploit apache 2.4
searchsploit wordpress 5.0
retire --path /path/to/js
10. Insufficient Logging (A09:2021)
- Failed login attempts not logged
- No audit trail
- Logs not monitored
- Logs stored insecurely
Phase 6: Session Management Testing
Session Analysis:
- Session fixation
- Session hijacking
- Weak session tokens
- Missing timeout
- Insecure transmission
Cookie Security Flags:
Set-Cookie: session=abc123; Secure; HttpOnly; SameSite=Strict
| Flag | Purpose |
|---|
| Secure | HTTPS only |
| HttpOnly | No JavaScript access |
| SameSite | CSRF protection |
Phase 7: Bypassing Client-Side Controls
Hidden Field Manipulation:
<input type="hidden" name="price" value="100">
<input type="hidden" name="price" value="1">
JavaScript Validation Bypass:
- Disable JavaScript in browser
- Intercept and modify with Burp
- Replay requests with modified values
Phase 8: Authentication Attacks
Common Techniques:
hydra -l admin -P passwords.txt target http-post-form "/login:user=^USER^&pass=^PASS^:Invalid"
Phase 9: Access Control Testing
IDOR Testing:
/user/1 -> /user/2
?role=user -> ?role=admin
Phase 10: Input Validation Testing
Injection Points:
Fuzzing with Burp:
- Send request to Intruder
- Mark injection points
- Select payload list
- Analyze responses
Phase 11: Error Code Analysis
- Invalid input types
- Long strings
- Special characters
- SQL syntax errors
- Stack traces
- Database errors
- Path disclosure
- Version information
Phase 12: Cryptography Testing
- Weak algorithms (MD5, SHA1, DES)
- ECB mode usage
- Hardcoded keys
- Missing encryption
sslscan target:443
testssl.sh target
Phase 13: Business Logic Vulnerabilities
Common Issues:
- Price manipulation
- Skipping workflow steps
- Race conditions
- Abuse of functionality
Testing Approach:
- Understand normal workflow
- Attempt to skip steps
- Modify values mid-process
- Test race conditions
Quick Reference
Essential Tools
| Tool | Purpose |
|---|
| BurpSuite | Web proxy and testing |
| OWASP ZAP | Open source alternative |
| sqlmap | SQL injection automation |
| Nikto | Web server scanning |
| Gobuster | Directory enumeration |
Testing Checklist
□ Map application and entry points
□ Test authentication mechanisms
□ Check authorization controls
□ Test input validation
□ Analyze session management
□ Check for injection flaws
□ Test business logic
□ Review error handling
□ Assess cryptographic implementation
Constraints
- Only test authorized systems
- Lab environments are essential for learning
- Real-world applications may differ from labs
- Tools require understanding, not just execution
Examples
Example 1: Quick XSS Test
<script>alert(document.domain)</script>
Example 2: SQLi Detection
' OR '1'='1
Troubleshooting
| Issue | Solution |
|---|
| Burp not intercepting | Check proxy settings, CA certificate |
| Lab not loading | Verify Docker is running |
| Payloads blocked | Try encoding, alternative syntax |
| Tool errors | Check dependencies, permissions |
