mcp-server-semgrep/semgrep-rules/javascript/lang/security/detect-child-process.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: detect-child-process
  message: >-
    Detected calls to child_process from a function argument `$FUNC`. This could lead to a command injection
    if the input is user controllable. Try to avoid calls to child_process, and if it is needed
    ensure user input is correctly sanitized or sandboxed. 
  metadata:
    cwe:
    - "CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')"
    owasp:
    - A01:2017 - Injection
    - A03:2021 - Injection
    references:
    - https://cheatsheetseries.owasp.org/cheatsheets/Nodejs_Security_Cheat_Sheet.html#do-not-use-dangerous-functions
    source-rule-url: https://github.com/nodesecurity/eslint-plugin-security/blob/master/rules/detect-child-process.js
    category: security
    technology:
    - javascript
    cwe2022-top25: true
    cwe2021-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: HIGH
    confidence: LOW
  languages:
  - javascript
  - typescript
  severity: ERROR
  mode: taint
  pattern-sources:
  - patterns:
    - pattern-inside: |
        function ... (...,$FUNC,...) {
          ...
        }
    - focus-metavariable: $FUNC
  pattern-sinks:
  - patterns:
    - pattern-either:
      - pattern-inside: |
          $CP = require('child_process')
          ...
      - pattern-inside: |
          import * as $CP from 'child_process'
          ...
      - pattern-inside: |
          import $CP from 'child_process'
          ...
    - pattern-either:
      - pattern: $CP.exec($CMD,...)
      - pattern: $CP.execSync($CMD,...)
      - pattern: $CP.spawn($CMD,...)
      - pattern: $CP.spawnSync($CMD,...)
    - pattern-not-inside: $CP.$EXEC("...",...)
    - pattern-not-inside: $CP.$EXEC(["...",...],...)
    - pattern-not-inside: |
        $CMD = "..."
        ...
    - pattern-not-inside: |
        $CMD = ["...",...]
        ...
    - focus-metavariable: $CMD
  - patterns:
    - pattern-either:
      - pattern: child_process.exec($CMD,...)
      - pattern: child_process.execSync($CMD,...)
      - pattern: child_process.spawn($CMD,...)
      - pattern: child_process.spawnSync($CMD,...)
    - pattern-not-inside: child_process.$EXEC("...",...)
    - pattern-not-inside: child_process.$EXEC(["...",...],...)
    - pattern-not-inside: |
        $CMD = "..."
        ...
    - pattern-not-inside: |
        $CMD = ["...",...]
        ...
    - focus-metavariable: $CMD