mcp-server-semgrep/semgrep-rules/csharp/lang/security/memory/memory-marshal-create-span.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: memory-marshal-create-span
  severity: WARNING
  languages:
  - C#
  metadata:
    cwe:
    - 'CWE-125: Out-of-bounds Read'
    owasp:
    - A04:2021 - Insecure Design
    references:
    - https://docs.microsoft.com/en-us/dotnet/api/system.runtime.interopservices.memorymarshal.createspan?view=net-6.0
    - https://docs.microsoft.com/en-us/dotnet/api/system.runtime.interopservices.memorymarshal.createreadonlyspan?view=net-6.0
    category: security
    technology:
    - .net
    confidence: LOW
    cwe2022-top25: true
    cwe2021-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: MEDIUM
  message: >-
    MemoryMarshal.CreateSpan and MemoryMarshal.CreateReadOnlySpan should be used with caution, as the
    length argument is not checked.
  pattern-either:
  - pattern: MemoryMarshal.CreateSpan(...)
  - pattern: MemoryMarshal.CreateReadOnlySpan(...)