mcp-server-semgrep/semgrep-rules/ruby/lang/security/no-send.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: bad-send
  message: >-
    Checks for unsafe use of Object#send, try, __send__, and public_send. These only
    account for unsafe
    use of a method, not target. This can lead to arbitrary calling of exit, along
    with arbitrary code execution.
    Please be sure to sanitize input in order to avoid this.
  metadata:
    cwe:
    - "CWE-94: Improper Control of Generation of Code ('Code Injection')"
    references:
    - https://github.com/presidentbeef/brakeman/blob/main/lib/brakeman/checks/check_send.rb
    - https://the.igreque.info/posts/2016/01-object-send-considered-harmful-en.html
    category: security
    technology:
    - ruby
    owasp:
    - A03:2021 - Injection
    cwe2022-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: MEDIUM
    confidence: LOW
  languages:
  - ruby
  severity: ERROR
  pattern-either:
  - pattern: |
      $PARAM = params[...]
      ...
      $RES = $MOD.send($PARAM.$FUNC)
  - pattern: |
      $PARAM = params[...]
      ...
      $RES = $MOD.try($PARAM.$FUNC)
  - pattern: |
      $PARAM = params[...]
      ...
      $RES = $MOD.__send__($PARAM.$FUNC)
  - pattern: |
      $PARAM = params[...]
      ...
      $RES = $MOD.public_send($PARAM.$FUNC)