mcp-server-semgrep/semgrep-rules/ruby/lang/security/audit/sha224-hash.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: sha224-hash
  message: >-
    This code uses a 224-bit hash function, which is deprecated or disallowed
    in some security policies. Consider updating to a stronger hash function such
    as SHA-384 or higher to ensure compliance and security.
  metadata:
    cwe:
    - 'CWE-328: Use of Weak Hash'
    references:
    - https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-131Ar3.ipd.pdf
    - https://www.cyber.gov.au/resources-business-and-government/essential-cyber-security/ism/cyber-security-guidelines/guidelines-cryptography
    category: security
    technology:
    - ruby
    owasp:
    - A03:2017 - Sensitive Data Exposure
    - A02:2021 - Cryptographic Failures
    subcategory:
    - vuln
    likelihood: LOW
    impact: LOW
    confidence: HIGH
  languages:
  - ruby
  severity: WARNING
  pattern-either:
  - pattern: Digest::SHA224.$FUNC
  - pattern: OpenSSL::Digest::SHA224.$FUNC
  - pattern: SHA3::Digest::SHA224(...)
  - patterns:
    - pattern-either:
      - pattern: OpenSSL::HMAC.hexdigest("$ALGO", ...)
      - pattern: OpenSSL::HMAC.digest("$ALGO", ...)
      - pattern: OpenSSL::HMAC.new($KEY, "$ALGO")
      - pattern: OpenSSL::Digest.digest("$ALGO", ...)
      - pattern: OpenSSL::Digest.new("$ALGO", ...)
    - metavariable-regex:
        metavariable: $ALGO
        regex: '.*224'