# Improper Neutralization of Special Elements in Data Query Logic (CWE-943)

The product generates a query intended to access or manipulate data in a data store, but it does not neutralize or incorrectly neutralizes special elements that can modify the intended logic of the query.

**Stack:** Python

- Prevalence: Hoch Häufig ausgenutzt
- Impact: Hoch 3 Regeln mit hohem Schweregrad
- Prevention: Dokumentiert 3 Fix-Beispiele

**OWASP:** Injection (A03:2021-Injection) - #3

## Description

This covers injection attacks against NoSQL databases, ORM frameworks, and other data query mechanisms that differ from traditional SQL injection.

## Prevention

Präventionsstrategien für NoSQL Injection basierend auf 1 Shoulder-Erkennungsregeln.

### Python

Validate input types and use ObjectId for ID fields

## Warning Signs

- [HIGH] untrusted user input being used in NoSQL queries without proper
validation

## Consequences

- Anwendungsdaten lesen
- Anwendungsdaten ändern
- Schutzmechanismus umgehen

## Mitigations

- Parametrisierte Abfragen für alle Datenspeicher verwenden
- Eingaben vor der Verwendung in Abfragen validieren und bereinigen
- Das Prinzip der geringsten Rechte auf Datenbankkonten anwenden

## Detection

- Total rules: 3
- Languages: go, javascript, typescript, python

## Rules by Language

### Python (1 rules)

- **NoSQL Injection** [HIGH]: Detects untrusted user input being used in NoSQL queries without proper
validation.
  - Remediation: Validate and type-check user input before using in queries.

```python
from bson import ObjectId
object_id = ObjectId(user_id)  # Validates format
```

Learn more: https://shoulder.dev/learn/python/cwe-943/nosql-injection