Cyberdudebivash

 Introduction

Injection attacks remain one of the most critical and exploited vulnerabilities in web applications. Whether it’s SQL Injection, Command Injection, or LDAP Injection, the core weakness is the same: untrusted input being passed directly into interpreters without proper validation or sanitization.

At CyberDudeBivash, we consider injection attacks as cybercriminals’ favorite weapons — enabling everything from data theft and privilege escalation to complete system compromise.

 Types of Injection

1. SQL Injection (SQLi)
   • Attacker manipulates database queries by injecting malicious SQL.
   • Example:SELECT * FROM users WHERE username = 'admin' OR '1'='1';
2. Command Injection
   • Injecting system-level commands into an application.
   • Example:ping -c 4 127.0.0.1; rm -rf /
3. LDAP Injection
   • Manipulating LDAP queries to gain unauthorized access.
   • Example:(&(uid=*)(userPassword=*))
4. NoSQL / JSON Injection
   • Exploiting MongoDB/NoSQL queries by passing malicious JSON payloads.

 Real-World Impact

• Massive Data Breaches → Extraction of customer records, financial data, PII.
• Account Takeovers (ATO) → Attackers bypass authentication.
• Remote Code Execution (RCE) → Through command injection.
• Regulatory Penalties → GDPR, HIPAA, PCI DSS violations.

 Detection & Threat Hunting

Indicators of Injection Exploitation

• Abnormal query execution patterns.
• Logs showing ' OR '1'='1 or other payloads.
• Excessive database errors (e.g., “syntax error near …”).

Threat Hunting Query (SIEM Example)

index=web_logs
| search "' OR '1'='1" OR "UNION SELECT" OR "xp_cmdshell" OR "(&(uid="
| stats count by src_ip, uri, user

 Defense Strategies

1. Parameterized Queries (Prepared Statements)
   • Prevents injection by separating SQL code from user input.
2. Input Validation & Sanitization
   • Reject unexpected characters (', ;, {}, etc.).
3. Stored Procedures (with caution)
   • Avoid dynamic SQL queries inside procedures.
4. Least Privilege Database Accounts
   • Ensure apps can only access necessary data — not admin-level.
5. Web Application Firewalls (WAF)
   • Block known injection payloads in real-time.
6. Continuous Testing
   • Integrate SAST/DAST tools in CI/CD pipelines.
   • Perform regular penetration testing for injection flaws.

 MITRE ATT&CK Mapping

• T1190 – Exploit Public-Facing Application
• T1505 – Server-Side Injection
• T1059 – Command & Scripting Interpreter

 Lessons Learned

• Injection remains one of the oldest yet most effective cyberattacks.
• A single unvalidated input can compromise an entire enterprise.
• Proactive validation, parameterization, and security testing are non-negotiable for defense.

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