SQL Injection — CWE-89: Improper Neutralization of Special Elements used in an SQL Command
Quick Navigation
- Difficulty Level: Intermediate
- Time to Read: 20-30 minutes (all sections)
- Status: Complete (sections 1-7) + Placeholder (section 8)
Full Case Study Structure
| Section | Focus | Time |
|---|---|---|
| 01 Vulnerability Overview | Multiple CVEs, unified by CWE-89 | 5 min |
| 02 Root Cause Analysis | Understanding SQL injection fundamentals | 8 min |
| 03 Attack Scenarios | CAPEC patterns and real attack examples | 7 min |
| 04 Detection Coverage | WAF rules, IDS signatures, log analysis | 6 min |
| 05 Defense Playbook | Input validation, parameterized queries, D3FEND | 8 min |
| 06 Reasoning Walkthrough | KGCS agent analysis for SQL injection | 10 min |
| 07 Live Query Examples | Cypher queries for SQL injection variants | 8 min |
| 08 vs LLM Comparison | (Deferred) How KGCS differs | TBD |
Why This Case Study?
SQL Injection (CWE-89) demonstrates: - ✅ Scale: One CWE, 100+ CVEs across all database systems - ✅ Universality: Affects every technology stack (PHP, Python, Java, Node.js, etc.) - ✅ Progression: Injection → Code execution → Data breach → Privilege escalation - ✅ Defense Maturity: Multiple mature defensive technologies (WAF, prepared statements, ORMs)
KGCS Graph Stats
| Metric | Value |
|---|---|
| Root CWE | CWE-89 |
| Related CVEs | 100+ across all databases |
| Attack Patterns | CAPEC-66, CAPEC-250, CAPEC-465 |
| ATT&CK Techniques | T1190, T1553, T1565 (multiple) |
| Affected Platforms | 1,000,000+ (all web applications using databases) |
| Defensive Controls | 20+ (WAF, code analysis, runtime monitoring) |
Quick Attack Example
-- Vulnerable code (Python)
query = "SELECT * FROM users WHERE username='" + username + "'"
results = db.execute(query)
-- Attack payload
username = "' OR '1'='1"
-- Executed query becomes:
-- SELECT * FROM users WHERE username='' OR '1'='1'
-- Returns all users (no authentication needed)
Complete Case Study
Ready to dive in? Start with 01 Vulnerability Overview
Jump to specifics: - Defense-focused? → 05 Defense Playbook - Developer? → 06 Reasoning Walkthrough - Hands-on?→ 07 Live Query Examples
This case study is complete. Sections [01-07] are ready to read.