Introduction
Bug Bounty hunting is a popular way for security researchers to earn money by finding vulnerabilities in software and reporting them to the companies that produce them. One of the most common tools used in Bug Bounty hunting is NMAP, a network exploration and security auditing tool. However, using NMAP Scans can be risky if not done properly. In this article, we will explore safe practices for using NMAP Scans in Bug Bounty hunting.
What is NMAP?
NMAP is a free and open-source tool used for network exploration and security auditing. It can be used to discover hosts and services on a computer network, as well as to create a map of the network. NMAP can also be used to identify vulnerabilities in networked systems.
Why Use NMAP in Bug Bounty Hunting?
NMAP is a popular tool for Bug Bounty hunters because it can be used to identify potential vulnerabilities in a target system. By scanning a target system with NMAP, a Bug Bounty hunter can identify open ports, services running on those ports, and potential vulnerabilities associated with those services.
Safe Practices for Using NMAP Scans in Bug Bounty Hunting
While NMAP can be a powerful tool for Bug Bounty hunting, it can also be risky if not used properly. Here are some safe practices for using NMAP Scans in Bug Bounty hunting:
1. Obtain Permission
Before scanning a target system with NMAP, it is important to obtain permission from the owner of the system. Scanning a system without permission can be illegal and can result in legal action being taken against the Bug Bounty hunter.
2. Use Stealth Scanning Techniques
NMAP offers several scanning techniques, including stealth scanning techniques that can help to avoid detection by intrusion detection systems (IDS) and firewalls. These techniques include SYN scanning, FIN scanning, and XMAS scanning. By using these techniques, a Bug Bounty hunter can avoid triggering alarms and potentially being blocked from the target system.
3. Use NMAP Scripts
NMAP comes with a variety of scripts that can be used to identify potential vulnerabilities in a target system. These scripts can be used to identify open ports, services running on those ports, and potential vulnerabilities associated with those services. By using these scripts, a Bug Bounty hunter can quickly identify potential vulnerabilities without having to manually analyze the results of the scan.
4. Analyze Results Carefully
Once the NMAP scan is complete, it is important to analyze the results carefully. This includes identifying potential vulnerabilities and determining the severity of those vulnerabilities. It is also important to verify any potential vulnerabilities before reporting them to the company that produces the software.
5. Report Vulnerabilities Responsibly
When reporting vulnerabilities to the company that produces the software, it is important to do so responsibly. This includes providing detailed information about the vulnerability, including steps to reproduce the vulnerability and potential impact of the vulnerability. It is also important to give the company time to fix the vulnerability before disclosing it publicly.
Case Studies
Here are some examples of how NMAP Scans have been used in Bug Bounty hunting:
1. Uber
In 2016, a Bug Bounty hunter discovered a vulnerability in Uber’s payment system using NMAP Scans. The vulnerability allowed the Bug Bounty hunter to bypass Uber’s payment system and receive free rides. The Bug Bounty hunter reported the vulnerability to Uber, which fixed the vulnerability and awarded the Bug Bounty hunter $10,000.
2. Yahoo
In 2017, a Bug Bounty hunter discovered a vulnerability in Yahoo’s login system using NMAP Scans. The vulnerability allowed the Bug Bounty hunter to bypass Yahoo’s two-factor authentication system. The Bug Bounty hunter reported the vulnerability to Yahoo, which fixed the vulnerability and awarded the Bug Bounty hunter $10,000.
Conclusion
NMAP Scans can be a powerful tool for Bug Bounty hunters, but they can also be risky if not used properly. By following safe practices, Bug Bounty hunters can use NMAP Scans to identify potential vulnerabilities in a target system without putting themselves or the target system at risk. Remember to always obtain permission before scanning a target system, use stealth scanning techniques, analyze results carefully, and report vulnerabilities responsibly.
