Wfuzz Cheat Sheet

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Sinopsis

Wfuzz es un fuzzer de aplicación web diseñado para facilitar evaluaciones de aplicaciones web. Se puede utilizar para encontrar recursos no vinculados (directorios, servlets, scripts, etc.), los parámetros de bruteforce GET y POST, los parámetros de bruteforce Forms (User/Password), Fuzzing, etc. Wfuzz es una poderosa herramienta para descubrir contenido oculto, probar vulnerabilidades y realizar evaluaciones de seguridad de aplicaciones web integrales.

NOVEDAD Advertencia: Únicamente use Wfuzz contra las aplicaciones que posee o tenga permiso explícito para probar. Las pruebas no autorizadas pueden violar términos de servicio o leyes locales.

Instalación

Instalación de paquetes Python

# Install via pip
pip install wfuzz

# Install with all dependencies
pip install wfuzz[complete]

# Install development version
pip install git+https://github.com/xmendez/wfuzz.git

# Verify installation
wfuzz --version

Instalación de paquete de sistema

# Ubuntu/Debian
sudo apt update
sudo apt install wfuzz

# CentOS/RHEL/Fedora
sudo yum install wfuzz
# or
sudo dnf install wfuzz

# Arch Linux
sudo pacman -S wfuzz

# macOS with Homebrew
brew install wfuzz

Docker Instalación

# Pull Docker image
docker pull ghcr.io/xmendez/wfuzz:latest

# Run with Docker
docker run --rm -it ghcr.io/xmendez/wfuzz:latest --help

# Create alias for easier usage
echo 'alias wfuzz="docker run --rm -it -v $(pwd):/data ghcr.io/xmendez/wfuzz:latest"' >> ~/.bashrc
source ~/.bashrc

Instalación manual

# Clone repository
git clone https://github.com/xmendez/wfuzz.git
cd wfuzz

# Install dependencies
pip install -r requirements.txt

# Install
python setup.py install

# Or run directly
python wfuzz.py --help

Uso básico

Directorio y Descubrimiento de archivos

# Basic directory fuzzing
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hc 404 http://target.com/FUZZ

# File extension fuzzing
wfuzz -c -w /usr/share/wordlists/dirb/common.txt -w /usr/share/wordlists/wfuzz/extensions/extensions.txt --hc 404 http://target.com/FUZZ.FUZ2Z

# Subdirectory fuzzing
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hc 404 http://target.com/admin/FUZZ

# Multiple directory levels
wfuzz -c -w /usr/share/wordlists/dirb/common.txt -w /usr/share/wordlists/dirb/common.txt --hc 404 http://target.com/FUZZ/FUZ2Z

# Backup file discovery
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hc 404 http://target.com/FUZZ.bak
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hc 404 http://target.com/FUZZ~

Parameter Fuzzing

# GET parameter fuzzing
wfuzz -c -w /usr/share/wordlists/wfuzz/Injections/SQL.txt "http://target.com/search.php?q=FUZZ"

# POST parameter fuzzing
wfuzz -c -w /usr/share/wordlists/wfuzz/Injections/SQL.txt -d "username=admin&password=FUZZ" http://target.com/login.php

# Multiple parameter fuzzing
wfuzz -c -w /usr/share/wordlists/dirb/common.txt -w /usr/share/wordlists/dirb/common.txt "http://target.com/search.php?FUZZ=FUZ2Z"

# Header fuzzing
wfuzz -c -w /usr/share/wordlists/wfuzz/Injections/SQL.txt -H "X-Forwarded-For: FUZZ" http://target.com/

# Cookie fuzzing
wfuzz -c -w /usr/share/wordlists/wfuzz/Injections/SQL.txt -b "sessionid=FUZZ" http://target.com/

Subdominio Discovery

# Subdomain enumeration
wfuzz -c -w /usr/share/wordlists/dirb/common.txt -H "Host: FUZZ.target.com" --hc 404 http://target.com/

# Subdomain with custom wordlist
wfuzz -c -w subdomains.txt -H "Host: FUZZ.target.com" --hc 404 http://target.com/

# Virtual host discovery
wfuzz -c -w /usr/share/wordlists/dirb/common.txt -H "Host: FUZZ" --hc 404 http://192.168.1.100/

Uso avanzado

Autenticación y Sesiones

# Basic authentication
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --basic admin:password --hc 404 http://target.com/FUZZ

# Cookie-based authentication
wfuzz -c -w /usr/share/wordlists/dirb/common.txt -b "PHPSESSID=abc123; auth=true" --hc 404 http://target.com/FUZZ

# Custom headers for authentication
wfuzz -c -w /usr/share/wordlists/dirb/common.txt -H "Authorization: Bearer token123" --hc 404 http://target.com/FUZZ

# Session-based fuzzing
wfuzz -c -w /usr/share/wordlists/dirb/common.txt -H "Cookie: session=valid_session_id" --hc 404 http://target.com/FUZZ

Filtro avanzado

# Hide specific response codes
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hc 404,403,500 http://target.com/FUZZ

# Hide specific response sizes
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hh 1234 http://target.com/FUZZ

# Hide responses with specific words
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hw 100 http://target.com/FUZZ

# Hide responses with specific lines
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hl 50 http://target.com/FUZZ

# Show only specific response codes
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --sc 200,301,302 http://target.com/FUZZ

# Complex filtering
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hc 404 --hh 1234 --hw 100 http://target.com/FUZZ

Opciones proxy y Network

# Use proxy
wfuzz -c -w /usr/share/wordlists/dirb/common.txt -p 127.0.0.1:8080 --hc 404 http://target.com/FUZZ

# Use SOCKS proxy
wfuzz -c -w /usr/share/wordlists/dirb/common.txt -p 127.0.0.1:9050:SOCKS5 --hc 404 http://target.com/FUZZ

# Custom timeout
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --conn-delay 2 --req-delay 1 --hc 404 http://target.com/FUZZ

# Concurrent connections
wfuzz -c -w /usr/share/wordlists/dirb/common.txt -t 50 --hc 404 http://target.com/FUZZ

# Follow redirects
wfuzz -c -w /usr/share/wordlists/dirb/common.txt -L --hc 404 http://target.com/FUZZ

Listas de palabras y cargas de pago

Listas de palabras comunes

# Directory wordlists
/usr/share/wordlists/dirb/common.txt
/usr/share/wordlists/dirb/big.txt
/usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt

# File wordlists
/usr/share/wordlists/wfuzz/general/common.txt
/usr/share/wordlists/wfuzz/general/admin-panels.txt
/usr/share/wordlists/wfuzz/general/megabeast.txt

# Parameter wordlists
/usr/share/wordlists/wfuzz/Injections/SQL.txt
/usr/share/wordlists/wfuzz/Injections/XSS.txt
/usr/share/wordlists/wfuzz/Injections/Traversal.txt

# Subdomain wordlists
/usr/share/wordlists/wfuzz/general/subdomains-top1mil-5000.txt
/usr/share/wordlists/wfuzz/general/subdomains-top1mil-20000.txt

Creación de Wordlist personalizado

# Create custom wordlist
cat > custom_dirs.txt << 'EOF'
admin
administrator
panel
dashboard
control
manage
backend
api
v1
v2
test
dev
staging
EOF

# Use custom wordlist
wfuzz -c -w custom_dirs.txt --hc 404 http://target.com/FUZZ

# Combine wordlists
cat /usr/share/wordlists/dirb/common.txt custom_dirs.txt > combined.txt
wfuzz -c -w combined.txt --hc 404 http://target.com/FUZZ

Generadores de carga

# Range payload
wfuzz -c -z range,1-100 --hc 404 http://target.com/user/FUZZ

# List payload
wfuzz -c -z list,admin-test-guest --hc 404 http://target.com/FUZZ

# File payload
wfuzz -c -z file,/usr/share/wordlists/dirb/common.txt --hc 404 http://target.com/FUZZ

# Hexrange payload
wfuzz -c -z hexrange,0x00-0xFF --hc 404 http://target.com/id/FUZZ

# Date payload
wfuzz -c -z range,2020-2024 -z range,01-12 -z range,01-31 --hc 404 "http://target.com/backup/FUZ2Z-FUZ3Z-FUZZ.sql"

Técnicas especializadas

Pruebas de inyección SQL

# Basic SQL injection fuzzing
wfuzz -c -w /usr/share/wordlists/wfuzz/Injections/SQL.txt "http://target.com/search.php?id=FUZZ"

# Time-based SQL injection
wfuzz -c -w /usr/share/wordlists/wfuzz/Injections/SQL.txt --filter "r.elapsed>5" "http://target.com/search.php?id=FUZZ"

# Error-based SQL injection
wfuzz -c -w /usr/share/wordlists/wfuzz/Injections/SQL.txt --filter "r.content~'error|mysql|sql'" "http://target.com/search.php?id=FUZZ"

# POST SQL injection
wfuzz -c -w /usr/share/wordlists/wfuzz/Injections/SQL.txt -d "username=admin&password=FUZZ" --filter "r.content~'welcome|dashboard'" http://target.com/login.php

XSS Pruebas

# Reflected XSS testing
wfuzz -c -w /usr/share/wordlists/wfuzz/Injections/XSS.txt "http://target.com/search.php?q=FUZZ"

# XSS in parameters
wfuzz -c -w /usr/share/wordlists/wfuzz/Injections/XSS.txt -d "comment=FUZZ" http://target.com/comment.php

# XSS filter bypass
wfuzz -c -w xss_payloads.txt --filter "r.content~'<script>'" "http://target.com/search.php?q=FUZZ"

# DOM XSS testing
wfuzz -c -w /usr/share/wordlists/wfuzz/Injections/XSS.txt "http://target.com/page.php#FUZZ"

Pruebas de carga de archivos

# File extension fuzzing
wfuzz -c -w extensions.txt -d "file=test.FUZZ" --filter "r.content~'uploaded|success'" http://target.com/upload.php

# MIME type fuzzing
wfuzz -c -w mime_types.txt -H "Content-Type: FUZZ" -d @file.txt http://target.com/upload.php

# File upload bypass
wfuzz -c -w bypass_extensions.txt -d "file=shell.FUZZ" http://target.com/upload.php

API Testing

# API endpoint discovery
wfuzz -c -w api_endpoints.txt --hc 404 http://target.com/api/FUZZ

# API version fuzzing
wfuzz -c -z range,1-10 --hc 404 http://target.com/api/vFUZZ/users

# REST API method fuzzing
wfuzz -c -w /usr/share/wordlists/dirb/common.txt -X GET,POST,PUT,DELETE --hc 404,405 http://target.com/api/FUZZ

# API parameter fuzzing
wfuzz -c -w parameters.txt "http://target.com/api/users?FUZZ=test"

# JSON API fuzzing
wfuzz -c -w /usr/share/wordlists/wfuzz/Injections/SQL.txt -H "Content-Type: application/json" -d '\\\\{"username":"admin","password":"FUZZ"\\\\}' http://target.com/api/login

Productos y presentación de informes

Formatos de salida

# Save to file
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hc 404 -o output.txt http://target.com/FUZZ

# JSON output
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hc 404 -f output.json,json http://target.com/FUZZ

# CSV output
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hc 404 -f output.csv,csv http://target.com/FUZZ

# HTML output
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hc 404 -f output.html,html http://target.com/FUZZ

# XML output
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hc 404 -f output.xml,xml http://target.com/FUZZ

Formato de rendimiento personalizado

# Custom output format
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hc 404 --format "ID: %i|Code: %c|Size: %h|URL: %u" http://target.com/FUZZ

# Verbose output
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hc 404 -v http://target.com/FUZZ

# Show request and response
wfuzz -c -w /usr/share/wordlists/dirb/common.txt --hc 404 --req-delay 1 -v http://target.com/FUZZ

Scripts de automatización

Script completo de Fuzzing Web

#!/bin/bash
# Comprehensive web application fuzzing script

TARGET="$1"
OUTPUT_DIR="wfuzz_results_$(date +%Y%m%d_%H%M%S)"

if [ -z "$TARGET" ]; then
    echo "Usage: $0 <target_url>"
    exit 1
fi

mkdir -p "$OUTPUT_DIR"

echo "[+] Starting comprehensive web fuzzing for: $TARGET"

# Directory discovery
echo "[+] Directory discovery..."
wfuzz -c -w /usr/share/wordlists/dirb/big.txt \
    --hc 404,403 \
    -f "$OUTPUT_DIR/directories.json,json" \
    "$TARGET/FUZZ" 2>/dev/null

# File discovery
echo "[+] File discovery..."
wfuzz -c -w /usr/share/wordlists/dirb/common.txt \
    -w /usr/share/wordlists/wfuzz/general/extensions.txt \
    --hc 404,403 \
    -f "$OUTPUT_DIR/files.json,json" \
    "$TARGET/FUZZ.FUZ2Z" 2>/dev/null

# Backup file discovery
echo "[+] Backup file discovery..."
wfuzz -c -w /usr/share/wordlists/dirb/common.txt \
    --hc 404,403 \
    -f "$OUTPUT_DIR/backups.json,json" \
    "$TARGET/FUZZ.bak" "$TARGET/FUZZ~" "$TARGET/FUZZ.old" 2>/dev/null

# Admin panel discovery
echo "[+] Admin panel discovery..."
wfuzz -c -w /usr/share/wordlists/wfuzz/general/admin-panels.txt \
    --hc 404,403 \
    -f "$OUTPUT_DIR/admin_panels.json,json" \
    "$TARGET/FUZZ" 2>/dev/null

# Parameter discovery
echo "[+] Parameter discovery..."
wfuzz -c -w /usr/share/wordlists/wfuzz/general/common.txt \
    --hc 404 \
    -f "$OUTPUT_DIR/parameters.json,json" \
    "$TARGET/?FUZZ=test" 2>/dev/null

echo "[+] Fuzzing completed. Results saved to: $OUTPUT_DIR"

# Generate summary
echo "[+] Generating summary..."
python3 << EOF
import json
import os

results_dir = "$OUTPUT_DIR"
summary = \\\\{\\\\}

for filename in os.listdir(results_dir):
    if filename.endswith('.json'):
        with open(os.path.join(results_dir, filename), 'r') as f:
            try:
                data = json.load(f)
                category = filename.replace('.json', '')
                summary[category] = len(data)
            except:
                summary[filename] = 0

print("\\n=== FUZZING SUMMARY ===")
for category, count in summary.items():
    print(f"\\\\{category\\\\}: \\\\{count\\\\} results")

with open(os.path.join(results_dir, 'summary.json'), 'w') as f:
    json.dump(summary, f, indent=2)
EOF

API Fuzzing Script

#!/bin/bash
# API endpoint fuzzing script

API_BASE="$1"
OUTPUT_DIR="api_fuzz_$(date +%Y%m%d_%H%M%S)"

if [ -z "$API_BASE" ]; then
    echo "Usage: $0 <api_base_url>"
    echo "Example: $0 https://api.example.com"
    exit 1
fi

mkdir -p "$OUTPUT_DIR"

echo "[+] Starting API fuzzing for: $API_BASE"

# API endpoint discovery
echo "[+] API endpoint discovery..."
wfuzz -c -w /usr/share/wordlists/wfuzz/general/common.txt \
    --hc 404,405 \
    -f "$OUTPUT_DIR/endpoints.json,json" \
    "$API_BASE/FUZZ" 2>/dev/null

# API version discovery
echo "[+] API version discovery..."
wfuzz -c -z range,1-10 \
    --hc 404,405 \
    -f "$OUTPUT_DIR/versions.json,json" \
    "$API_BASE/vFUZZ" "$API_BASE/apiFUZZ" 2>/dev/null

# Common API paths
echo "[+] Common API paths..."
cat > api_paths.txt << 'EOF'
users
user
admin
auth
login
logout
register
profile
settings
config
status
health
version
docs
swagger
api-docs
EOF

wfuzz -c -w api_paths.txt \
    --hc 404,405 \
    -f "$OUTPUT_DIR/api_paths.json,json" \
    "$API_BASE/FUZZ" 2>/dev/null

# HTTP methods testing
echo "[+] HTTP methods testing..."
wfuzz -c -w api_paths.txt \
    -X GET,POST,PUT,DELETE,PATCH,OPTIONS,HEAD \
    --hc 404 \
    -f "$OUTPUT_DIR/methods.json,json" \
    "$API_BASE/FUZZ" 2>/dev/null

rm api_paths.txt

echo "[+] API fuzzing completed. Results saved to: $OUTPUT_DIR"

Subdominio Fuzzing Script

#!/bin/bash
# Subdomain discovery script

DOMAIN="$1"
OUTPUT_DIR="subdomain_fuzz_$(date +%Y%m%d_%H%M%S)"

if [ -z "$DOMAIN" ]; then
    echo "Usage: $0 <domain>"
    echo "Example: $0 example.com"
    exit 1
fi

mkdir -p "$OUTPUT_DIR"

echo "[+] Starting subdomain fuzzing for: $DOMAIN"

# Common subdomains
echo "[+] Common subdomain fuzzing..."
wfuzz -c -w /usr/share/wordlists/wfuzz/general/subdomains-top1mil-5000.txt \
    -H "Host: FUZZ.$DOMAIN" \
    --hc 404 \
    --hh 0 \
    -f "$OUTPUT_DIR/subdomains.json,json" \
    "http://$DOMAIN/" 2>/dev/null

# Development subdomains
echo "[+] Development subdomain fuzzing..."
cat > dev_subdomains.txt << 'EOF'
dev
test
staging
beta
alpha
demo
sandbox
lab
qa
uat
pre
preprod
prod
www
mail
ftp
admin
api
app
mobile
m
blog
shop
store
portal
dashboard
EOF

wfuzz -c -w dev_subdomains.txt \
    -H "Host: FUZZ.$DOMAIN" \
    --hc 404 \
    --hh 0 \
    -f "$OUTPUT_DIR/dev_subdomains.json,json" \
    "http://$DOMAIN/" 2>/dev/null

rm dev_subdomains.txt

echo "[+] Subdomain fuzzing completed. Results saved to: $OUTPUT_DIR"

Integración con otras herramientas

Burp Suite Integration

# Use Burp as proxy
wfuzz -c -w /usr/share/wordlists/dirb/common.txt \
    -p 127.0.0.1:8080 \
    --hc 404 \
    http://target.com/FUZZ

# Export results for Burp analysis
wfuzz -c -w /usr/share/wordlists/dirb/common.txt \
    --hc 404 \
    -f burp_targets.txt,raw \
    http://target.com/FUZZ

OWASP ZAP Integración

# Use ZAP as proxy
wfuzz -c -w /usr/share/wordlists/dirb/common.txt \
    -p 127.0.0.1:8080 \
    --hc 404 \
    http://target.com/FUZZ

# Generate ZAP-compatible URLs
wfuzz -c -w /usr/share/wordlists/dirb/common.txt \
    --hc 404 \
    --format "%u" \
    http://target.com/FUZZ > zap_urls.txt

Nuclei Integration

# Generate URLs for Nuclei scanning
wfuzz -c -w /usr/share/wordlists/dirb/common.txt \
    --hc 404 \
    --format "%u" \
    http://target.com/FUZZ > discovered_urls.txt

# Run Nuclei on discovered URLs
nuclei -l discovered_urls.txt -t /path/to/nuclei-templates/

Solución de problemas

Cuestiones comunes

Tasa de limitación

# Reduce request rate
wfuzz -c -w /usr/share/wordlists/dirb/common.txt \
    --req-delay 2 \
    --conn-delay 1 \
    -t 5 \
    --hc 404 \
    http://target.com/FUZZ

# Random delay
wfuzz -c -w /usr/share/wordlists/dirb/common.txt \
    --req-delay 1-3 \
    --hc 404 \
    http://target.com/FUZZ

Cuestiones SSL/TLS

# Ignore SSL certificate errors
wfuzz -c -w /usr/share/wordlists/dirb/common.txt \
    --hc 404 \
    --insecure \
    https://target.com/FUZZ

# Specify SSL version
wfuzz -c -w /usr/share/wordlists/dirb/common.txt \
    --hc 404 \
    --ssl-version TLSv1.2 \
    https://target.com/FUZZ

Cuestiones de memoria

# Reduce concurrent threads
wfuzz -c -w /usr/share/wordlists/dirb/common.txt \
    -t 10 \
    --hc 404 \
    http://target.com/FUZZ

# Use smaller wordlists
wfuzz -c -w /usr/share/wordlists/dirb/small.txt \
    --hc 404 \
    http://target.com/FUZZ

Cuestiones de red

# Increase timeout
wfuzz -c -w /usr/share/wordlists/dirb/common.txt \
    --conn-delay 5 \
    --req-delay 2 \
    --hc 404 \
    http://target.com/FUZZ

# Retry failed requests
wfuzz -c -w /usr/share/wordlists/dirb/common.txt \
    --retry 3 \
    --hc 404 \
    http://target.com/FUZZ

Recursos

• Documentación oficial de Wfuzz
• Wfuzz GitHub Repository
• Web Application Security Testing Guide
• SecLists Wordlists
• Guía de Pruebas de la OPEP
• Burp Suite Documentation
• Prueba de Penetración de la aplicación web

-...

*Esta hoja de trampa proporciona una referencia completa para usar Wfuzz para las pruebas de seguridad de aplicaciones web. Siempre asegúrese de tener una autorización adecuada antes de usar esta herramienta en cualquier entorno. *