Unsafe execution of shell commands

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Metadata

ID: python-security/asyncio-subprocess-exec

Language: Python

Severity: Error

Category: Security

CWE: 78

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.

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Non-Compliant Code Examples

import asyncio

def handler(event, context):
    # Should sanitize arguments
    async_loop.run_until_complete(async_loop.subprocess_exec(waiting_protocol, ["/bin/sh", "mycommand"]))

Compliant Code Examples

import asyncio
import shlex

def handler(event, context):
    # Should sanitize arguments
    async_loop.run_until_complete(async_loop.subprocess_exec(waiting_protocol, shlex.split(shlex.quote("/bin/sh mycommand"))))