Metadata

ID: python-security/asyncio-subprocess-create-shell

Language: Python

Severity: Error

Category: Security

Description

Detect unsafe shell execution in the asyncio framework. When we invoke the shell, we should make sure that the data is safe and secure. Use shlex to sanitize user inputs.

Learn More

• Python shlex() module
• CWE 78 - Improper Neutralization of Special Elements used in an OS Command

Non-Compliant Code Examples

import asyncio

def handler(event, context):
    # Should sanitize arguments
    async_loop.run_until_complete(async_loop.create_subprocess_shell("mycommand"))

Compliant Code Examples

import asyncio
import shlex

def handler(event, context):
    # Should sanitize arguments
    async_loop.run_until_complete(async_loop.create_subprocess_shell(shlex.escape("mycommand")))

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