mcp-server-semgrep/semgrep-rules/javascript/lang/security/audit/dangerous-spawn-shell.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: dangerous-spawn-shell
  message: >-
    Detected non-literal calls to $EXEC(). This could lead to a command
    injection vulnerability.
  metadata:
    cwe:
    - "CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')"
    owasp:
    - A01:2017 - Injection
    - A03:2021 - Injection
    source-rule-url: https://github.com/nodesecurity/eslint-plugin-security/blob/master/rules/detect-child-process.js
    category: security
    technology:
    - javascript
    references:
    - https://cheatsheetseries.owasp.org/cheatsheets/Nodejs_Security_Cheat_Sheet.html#do-not-use-dangerous-functions
    cwe2022-top25: true
    cwe2021-top25: true
    subcategory:
    - vuln
    likelihood: HIGH
    impact: MEDIUM
    confidence: LOW
  languages:
  - javascript
  - typescript
  severity: ERROR
  mode: taint
  pattern-sources:
  - patterns:
    - pattern-inside: |
        function ... (...,$FUNC,...) {
          ...
        }
    - focus-metavariable: $FUNC
  pattern-sinks:
  - patterns:
    - pattern-either:
      - pattern-inside: |
          require('child_process')
          ...
      - pattern-inside: |
          import 'child_process'
          ...
    - pattern-either:
      - pattern: spawn(...)
      - pattern: spawnSync(...)
      - pattern: $CP.spawn(...)
      - pattern: $CP.spawnSync(...)
    - pattern-either:
      - pattern: |
          $EXEC("=~/(sh|bash|ksh|csh|tcsh|zsh)/",["-c", $ARG, ...],...)
      - patterns:
        - pattern: $EXEC($CMD,["-c", $ARG, ...],...)
        - pattern-inside: |
            $CMD = "=~/(sh|bash|ksh|csh|tcsh|zsh)/"
            ...
      - pattern: |
          $EXEC("=~/(sh|bash|ksh|csh|tcsh|zsh)/",[$ARG, ...],...)
      - patterns:
        - pattern: $EXEC($CMD,[$ARG, ...],...)
        - pattern-inside: |
            $CMD = "=~/(sh|bash|ksh|csh|tcsh|zsh)/"
            ...
    - focus-metavariable: $ARG