mcp-server-semgrep/semgrep-rules/ruby/lang/security/weak-hashes-md5.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: weak-hashes-md5
  message: >-
    Should not use md5 to generate hashes. md5 is proven to be vulnerable through
    the use of brute-force attacks.
    Could also result in collisions, leading to potential collision attacks. Use SHA256
    or other hashing functions instead.
  metadata:
    cwe:
    - 'CWE-328: Use of Weak Hash'
    references:
    - https://www.ibm.com/support/pages/security-bulletin-vulnerability-md5-signature-and-hash-algorithm-affects-sterling-integrator-and-sterling-file-gateway-cve-2015-7575
    category: security
    technology:
    - ruby
    owasp:
    - A03:2017 - Sensitive Data Exposure
    - A02:2021 - Cryptographic Failures
    subcategory:
    - vuln
    likelihood: LOW
    impact: HIGH
    confidence: MEDIUM
  languages:
  - ruby
  severity: WARNING
  pattern-either:
  - pattern: Digest::MD5.base64digest $X
  - pattern: Digest::MD5.hexdigest $X
  - pattern: Digest::MD5.digest $X
  - pattern: Digest::MD5.new
  - pattern: OpenSSL::Digest::MD5.base64digest $X
  - pattern: OpenSSL::Digest::MD5.hexdigest $X
  - pattern: OpenSSL::Digest::MD5.digest $X
  - pattern: OpenSSL::Digest::MD5.new