# Inclusion of Functionality from Untrusted Control Sphere (CWE-829)

The product imports, requires, or includes executable functionality from a source that is outside of the intended control sphere.

**Stack:** Kubernetes

- 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 4 件の修正例

**OWASP:** Vulnerable and Outdated Components (A06:2021-Vulnerable and Outdated Components) - #6

## Description

When software includes functionality from untrusted sources (such as third-party scripts, external modules, or code from untrusted URLs), attackers can inject malicious code that will be executed with the same privileges as the application.

## Prevention

1 件の Shoulder 検出ルールに基づく Inclusion of Untrusted Functionality の予防策。

### Kubernetes

Pin container images to specific version tags or SHA digests for reproducible deployments

## Warning Signs

- [MEDIUM] Container image uses 'latest' tag or no tag.
- [MEDIUM] container images using 'latest' tag or no tag

## Consequences

- 未承認コードの実行
- アプリケーションデータの読み取り
- アプリケーションデータの変更

## Mitigations

- 信頼できる検証済みのソースからのコードのみを取り込む
- 外部スクリプトには Subresource Integrity (SRI) を使用する
- 実行可能コードのソースを制限するために Content Security Policy (CSP) を導入する

## Detection

- Total rules: 4
- Languages: go, javascript, typescript, yaml, python

## Rules by Language

### Yaml (1 rules)

- **Container Using Latest Tag** [MEDIUM]: Detects container images using 'latest' tag or no tag.
  - Remediation: Use specific image tags for production.

```yaml
containers:
  - name: app
    image: nginx:1.21.6-alpine
```

Learn more: https://shoulder.dev/learn/kubernetes/cwe-829/image-latest-tag