mcp-server-semgrep/semgrep-rules/ruby/lang/security/dangerous-subshell.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: dangerous-subshell
  patterns:
  - pattern: |
      `...#{$VAL}...`
  - pattern-not: |
      `...#{"..."}...`
  - pattern-not-inside: |
      $VAL = "..."
      ...
  message: >-
    Detected non-static command inside `...`.
    If unverified user data can reach this call site, this is a code injection
    vulnerability. A malicious actor can inject a malicious script to execute
    arbitrary code.
  metadata:
    cwe:
    - "CWE-94: Improper Control of Generation of Code ('Code Injection')"
    owasp:
    - A03:2021 - Injection
    category: security
    technology:
    - ruby
    references:
    - https://owasp.org/Top10/A03_2021-Injection
    cwe2022-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: HIGH
    confidence: LOW
  severity: WARNING
  languages: [ruby]