CorScan: A Comprehensive Tool for CORS Vulnerability Detection

Cross-Origin Resource Sharing (CORS) :

is a critical security feature implemented in web browsers to restrict how resources on one origin (domain) can interact with resources on another. However, misconfigurations in CORS can lead to severe security vulnerabilities, allowing attackers to bypass the same-origin policy and access sensitive data. This is where Corscan comes into play.

Corscan

What is Corscan?

Corscan is a powerful, multi-threaded tool designed for pentesters and security professionals to detect misconfigurations in CORS implementations that could be exploited for attacks. It is equipped with advanced features, including WAF (Web Application Firewall) detection and dynamic bypass strategies, making it an essential tool in any security toolkit.

Key Features

• Dynamic Bypass Strategy Generation: Corscan dynamically generates bypass strategies based on the domain being checked, such as appending “.evil.com” to the domain and other similar strategies, allowing for a more comprehensive detection process.
• WAF Detection: The tool identifies and bypasses Web Application Firewalls that may interfere with the testing process.
• High Performance: Using Python’s ThreadPoolExecutor, Corscan is optimized for speed, handling multiple targets concurrently with a default of 20 threads, customizable to your needs.
• Custom Payloads and Outputs: You can add custom payloads and specify output formats to adapt the tool for various testing scenarios.

Installation and Setup

To get started with Corscan, follow these simple steps:

GitHub Link : Corscan

Clone the Repository:

git clone https://github.com/Angix-Black/Corscan.git

cd corscan

python3 setup.py install

Run the Tool:

Check a single URL:

crsn -u https://example.com

Check a list of URLs from a file:

crsn -f urls.txt

Usage Scenarios

Corscan is particularly useful for:

• Bug Bounty Hunters: Quickly scan and detect vulnerable endpoints for misconfigurations in CORS policies.
• Pentesters: Conduct comprehensive assessments of web applications to identify and exploit CORS vulnerabilities.
• Security Researchers: Understand the impact of CORS misconfigurations in different environments and test new bypass strategies.

Corscan is more than just a tool; it’s a strategic asset in your cybersecurity arsenal. By automating the detection of CORS misconfigurations and offering dynamic bypass strategies, Corscan helps you stay ahead of potential threats and keep your web applications secure.