# Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') (CWE-90)

The product constructs all or part of an LDAP query using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended LDAP query.

**Stack:** JavaScript

- Prevalence: उच्च बार-बार शोषित
- Impact: उच्च 3 उच्च गंभीरता वाले नियम
- Prevention: प्रलेखित 3 फिक्स उदाहरण

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

## Description

If user input is incorporated into an LDAP query without proper sanitization, an attacker can inject LDAP commands that could read or modify sensitive directory information.

## Prevention

1 Shoulder डिटेक्शन नियमों पर आधारित LDAP Injection के लिए रोकथाम रणनीतियाँ।

### JavaScript

Escape LDAP special characters in user input before constructing LDAP queries

## Warning Signs

- [HIGH] user input flowing to LDAP queries without escaping special characters

## Consequences

- एप्लिकेशन डेटा पढ़ना
- एप्लिकेशन डेटा संशोधित करना
- सुरक्षा तंत्र को बायपास करना

## Mitigations

- जहां संभव हो, पैरामीटराइज़्ड LDAP क्वेरीज़ का उपयोग करें
- LDAP क्वेरीज़ में उपयोग किए जाने वाले सभी उपयोगकर्ता इनपुट को escape या encode करें
- स्वीकार्य वर्णों की allowlist के विरुद्ध इनपुट को सत्यापित करें

## Detection

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

## Rules by Language

### Javascript (1 rules)

- **LDAP Injection** [HIGH]: Detects user input flowing to LDAP queries without escaping special characters.
  - Remediation: Escape LDAP special characters before including user input in queries.

```javascript
const safe = input.replace(/[\\*()]/g, c =>
  '\\' + c.charCodeAt(0).toString(16));
ldap.search(`cn=${safe},dc=example,dc=com`, opts);
```

Learn more: https://shoulder.dev/learn/javascript/cwe-90/ldap-injection

### Typescript (1 rules)

- **LDAP Injection** [HIGH]: Detects user input flowing to LDAP queries without escaping special characters.
  - Remediation: Escape LDAP special characters before including user input in queries.

```javascript
const safe = input.replace(/[\\*()]/g, c =>
  '\\' + c.charCodeAt(0).toString(16));
ldap.search(`cn=${safe},dc=example,dc=com`, opts);
```

Learn more: https://shoulder.dev/learn/javascript/cwe-90/ldap-injection