mcp-server-semgrep/semgrep-rules/python/lang/security/audit/insecure-transport/urllib/insecure-urlretrieve-ftp.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: insecure-urlretrieve-ftp
  message: >-
    Detected 'urllib.urlretrieve()' using 'ftp://'. This request will not be
    encrypted. Use SFTP instead. urllib does not support SFTP, so consider
    switching to a library which supports SFTP.
  metadata:
    owasp:
    - A03:2017 - Sensitive Data Exposure
    - A02:2021 - Cryptographic Failures
    cwe:
    - 'CWE-319: Cleartext Transmission of Sensitive Information'
    references:
    - https://docs.python.org/3/library/urllib.request.html#urllib.request.urlretrieve
    category: security
    technology:
    - urllib
    subcategory:
    - audit
    likelihood: LOW
    impact: LOW
    confidence: LOW
  severity: WARNING
  languages: [python]
  pattern-either:
  - pattern: urllib.request.urlretrieve("=~/^[Ff][Tt][Pp]://.*/", ...)
  - pattern: |
      $URL = "=~/^[Ff][Tt][Pp]://.*/"
      ...
      urllib.request.urlretrieve($URL, ...)
  - pattern: |-
      def $FUNC(..., $URL = "=~/^[Ff][Tt][Pp]://.*/", ...):
        ...
        urllib.request.urlretrieve($URL, ...)