# Weak Password Recovery Mechanism for Forgotten Password (CWE-640)

The product contains a mechanism for users to recover or change their passwords without knowing the original password, but the mechanism is weak.

**Stack:** Python

- Prevalence: 高 頻繁に悪用される
- Impact: ハイ 3 件の重大度ハイのルール
- Prevention: 文書化済み 3 件の修正例

**OWASP:** Identification and Authentication Failures (A07:2021-Identification and Authentication Failures) - #7

## Description

Weak password recovery mechanisms can be exploited to take over user accounts. Common issues include predictable reset tokens, security questions with easily guessable answers, or lack of verification.

## Prevention

1 件の Shoulder 検出ルールに基づく Weak Password Recovery の予防策。

### Python

Use the secrets module for cryptographically secure token generation

## Warning Signs

- [HIGH] password reset tokens generated using weak or predictable methods like timestamps or non-cryptograph

## Consequences

- 権限の取得
- 保護メカニズムの回避

## Mitigations

- パスワードリセットリンクには強力でランダムなトークンを使用する
- トークンの有効期限を設定する (例: 1 時間)
- メールや SMS など追加の検証を要求する
- ログに残る可能性のある URL にリセットトークンを含めない

## Detection

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

## Rules by Language

### Python (1 rules)

- **Weak Password Reset Token** [HIGH]: Detects password reset tokens generated using weak or predictable methods like timestamps or non-cryptographic random.
  - Remediation: Use the secrets module for cryptographically secure token generation.

```python
import secrets
token = secrets.token_urlsafe(32)
```

Learn more: https://shoulder.dev/learn/python/cwe-640/weak-password-reset-token