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Introduction
Bug bounty hunting and cybersecurity research require a deep understanding of tools, commands, and techniques to identify vulnerabilities effectively. This article covers essential Linux, Windows, and web application security commands, along with step-by-step guides to help security researchers and penetration testers strengthen their skills.
Learning Objectives
- Master critical Linux and Windows commands for security assessments.
- Learn how to perform web application penetration testing using essential tools.
- Understand vulnerability exploitation and mitigation techniques.
You Should Know
1. Network Scanning with Nmap
Command:
nmap -sV -A -T4 target.com
What It Does:
This Nmap command performs an aggressive scan (-A) with version detection (-sV) and fast execution (-T4). It identifies open ports, services, and potential vulnerabilities.
How to Use It:
- Install Nmap (
sudo apt install nmapon Linux). - Run the command against a target domain or IP.
- Analyze the output for exposed services and misconfigurations.
2. Directory Bruteforcing with Dirb
Command:
dirb http://target.com /usr/share/wordlists/dirb/common.txt
What It Does:
Dirb scans a web application for hidden directories using a predefined wordlist.
How to Use It:
1. Install Dirb (`sudo apt install dirb`).
- Run the command with the target URL and a wordlist.
3. Review discovered directories for sensitive files.
3. Windows Privilege Escalation Check
Command (PowerShell):
whoami /priv
What It Does:
Displays the current user’s privileges, helping identify potential escalation paths.
How to Use It:
1. Open PowerShell as an unprivileged user.
- Execute the command to check for misconfigured permissions.
4. SQL Injection Testing with SQLmap
Command:
sqlmap -u "http://target.com/page?id=1" --dbs
What It Does:
Automates SQL injection detection and database enumeration.
How to Use It:
1. Install SQLmap (`pip install sqlmap`).
2. Run the command against a vulnerable parameter.
3. Extract database names (`–dbs`) or tables (`–tables`).
5. Cloud Security: AWS S3 Bucket Check
Command:
aws s3 ls s3://bucket-name --no-sign-request
What It Does:
Checks for publicly accessible AWS S3 buckets.
How to Use It:
1. Install AWS CLI (`sudo apt install awscli`).
- Run the command to list bucket contents if permissions are misconfigured.
6. Exploiting XSS Vulnerabilities
Payload Example:
<script>alert('XSS')</script>
What It Does:
Tests for Cross-Site Scripting (XSS) vulnerabilities by injecting a script.
How to Use It:
- Input the payload in search bars or form fields.
- If an alert pops up, the site is vulnerable.
7. Linux Privilege Escalation via SUID
Command:
find / -perm -4000 2>/dev/null
What It Does:
Finds SUID binaries that may allow privilege escalation.
How to Use It:
- Run the command on a compromised Linux system.
2. Research any unusual binaries for exploitation.
What Undercode Say
- Key Takeaway 1: Mastering command-line tools like Nmap and SQLmap is crucial for efficient security assessments.
- Key Takeaway 2: Misconfigured cloud storage and SUID binaries remain common attack vectors.
Analysis:
Bug bounty hunters must stay updated with evolving attack techniques and mitigation strategies. Automation tools like SQLmap and Dirb save time, but manual testing is still essential for uncovering complex vulnerabilities. Cloud security misconfigurations are increasingly targeted, making tools like AWS CLI vital for penetration testers.
Prediction
As AI-driven security tools advance, bug bounty hunters will leverage machine learning to automate vulnerability discovery. However, human expertise will remain critical for interpreting results and uncovering sophisticated exploits.
IT/Security Reporter URL:
Reported By: Deepak Saini – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
