mcp-server-semgrep/semgrep-rules/python/aws-lambda/security/tainted-code-exec.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: tainted-code-exec
  mode: taint
  pattern-sources:
  - patterns:
    - pattern: event
    - pattern-inside: |
        def $HANDLER(event, context):
          ...
  pattern-sinks:
  - patterns:
    - pattern-either:
      - pattern: eval($CODE, ...)
      - pattern: exec($CODE, ...)
  message: >-
    Detected the use of `exec/eval`.This can be dangerous if used to evaluate
    dynamic content. If this content can be input from outside the program,
    this may be a code injection vulnerability. Ensure evaluated content is
    not definable by external sources.
  metadata:
    cwe:
    - "CWE-95: Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')"
    owasp:
    - A03:2021 - Injection
    asvs:
      section: 'V5: Validation, Sanitization and Encoding Verification Requirements'
      control_id: 5.2.4 Dyanmic Code Execution Features
      control_url: https://github.com/OWASP/ASVS/blob/master/4.0/en/0x13-V5-Validation-Sanitization-Encoding.md#v52-sanitization-and-sandboxing-requirements
      version: '4'
    category: security
    technology:
    - python
    references:
    - https://owasp.org/Top10/A03_2021-Injection
    subcategory:
    - vuln
    likelihood: MEDIUM
    impact: MEDIUM
    confidence: MEDIUM
  languages:
  - python
  severity: WARNING