mcp-server-semgrep/semgrep-rules/kotlin/lang/security/no-null-cipher.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: no-null-cipher
  pattern: NullCipher(...)
  metadata:
    cwe:
    - 'CWE-327: Use of a Broken or Risky Cryptographic Algorithm'
    owasp:
    - A03:2017 - Sensitive Data Exposure
    - A02:2021 - Cryptographic Failures
    source-rule-url: https://find-sec-bugs.github.io/bugs.htm#NULL_CIPHER
    asvs:
      section: V6 Stored Cryptography Verification Requirements
      control_id: 6.2.5 Insecure Algorithm
      control_url: https://github.com/OWASP/ASVS/blob/master/4.0/en/0x14-V6-Cryptography.md#v62-algorithms
      version: '4'
    category: security
    technology:
    - kotlin
    references:
    - https://owasp.org/Top10/A02_2021-Cryptographic_Failures
    subcategory:
    - vuln
    likelihood: LOW
    impact: MEDIUM
    confidence: MEDIUM
  message: 'NullCipher was detected. This will not encrypt anything; the cipher text will be the same
    as the plain text. Use a valid, secure cipher: Cipher.getInstance("AES/CBC/PKCS7PADDING"). See https://owasp.org/www-community/Using_the_Java_Cryptographic_Extensions
    for more information.'
  severity: WARNING
  languages:
  - kt
  - scala