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In the ever-evolving world of cybersecurity, understanding how attackers exploit weaknesses in web systems is critical. Whether targeting web applications or web servers, attackers use a variety of techniques to gain unauthorized access, steal data, or disrupt services.
🔍 Web Application Hacking
Exploiting vulnerabilities in an app’s code and user inputs:
– SQL Injection – Injecting malicious queries to access databases.
– Cross-Site Scripting (XSS) – Injecting scripts to steal user data.
– Authentication Bypass – Exploiting weak login mechanisms.
– Business Logic Abuse – Manipulating app workflows for unintended access.
💻 Web Server Hacking
Targeting the infrastructure hosting the application:
- Remote Code Execution (RCE) – Running malicious code due to software flaws.
- Misconfigurations & Open Ports – Gaining access through exposed services.
- Directory Traversal – Accessing sensitive files through URL manipulation.
- Denial of Service (DoS) – Overloading the server with excessive requests.
🔐 You Should Know:
SQL Injection Prevention (MySQL Example)
-- Vulnerable Query SELECT FROM users WHERE username = '$user' AND password = '$pass'; -- Secure Query (Parameterized) PREPARE stmt FROM 'SELECT FROM users WHERE username = ? AND password = ?'; EXECUTE stmt USING @user, @pass;
Preventing XSS Attacks (PHP Example)
// Vulnerable Code echo $_GET['user_input']; // Secure Code echo htmlspecialchars($_GET['user_input'], ENT_QUOTES, 'UTF-8');
Detecting Open Ports (Linux Command)
nmap -sV -p 1-1000 target.com
Blocking DoS Attacks (iptables Rule)
iptables -A INPUT -p tcp --dport 80 -m connlimit --connlimit-above 50 -j DROP
Directory Traversal Mitigation (Apache Config)
<Directory "/var/www/html"> AllowOverride None Require all denied <FilesMatch "\.(php|html)$"> Require all granted </FilesMatch> </Directory>
Securing SSH (Linux Command)
sudo nano /etc/ssh/sshd_config Disable root login & restrict users PermitRootLogin no AllowUsers your_username
What Undercode Say
Web security requires constant vigilance. Attackers evolve, and so must defenses. Regular penetration testing, secure coding practices, and hardening server configurations are essential.
Additional Linux Security Commands:
- Check for suspicious processes:
ps aux | grep -i 'malicious_pattern'
- Monitor network traffic:
tcpdump -i eth0 -w capture.pcap
- Find world-writable files (potential security risk):
find / -type f -perm -o+w -exec ls -l {} \;
Windows Security Commands:
- Check active connections:
netstat -ano
- Scan for malware with Windows Defender:
MpCmdRun.exe -Scan -ScanType 2
Expected Output:
A hardened web system resistant to common attacks, with logs and monitoring in place to detect and mitigate threats in real-time.
Stay secure, stay updated! 🔒
References:
Reported By: Anupam Shinde – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
