Use of unsanitized data to create processes

Cette page n'est pas encore disponible en français, sa traduction est en cours.
Si vous avez des questions ou des retours sur notre projet de traduction actuel, n'hésitez pas à nous contacter.

Metadata

ID: python-flask/os-system-unsanitized-data

Language: Python

Severity: Error

Category: Security

CWE: 78

Description

Use of unsanitized from incoming request to execute a command may lead to command injection. It is highly recommended that data is checked and sanitized before use.

Learn More

Non-Compliant Code Examples

import flask
import os

app = flask.Flask(__name__)



@app.route("/route/to/resource/<resource_id>")
def resource2(resource_id):
    file1 = subprocess.call(resource_id)
    file2 = subprocess.capture_output(f"/path/to/{resource_id}")

@app.route("/route/to/resource/<resource_id>")
def resource2(resource_id):
    file4 = os.system("/path/to/{0}".format(resource_id))
    os.system(request.remote_addr)
    bla = os.system(request.foo)

@app.route("/route/to/resource")
def resource2():
    resource_id = flask.request.args.get("resource_id")
    subprocess.call(resource_id)
    subprocess.run(["command", resource_id])

Compliant Code Examples

import flask
import os

app = flask.Flask(__name__)

@app.route("/route/to/resource/<resource_id>")
def resource2(resource_id):
    file1 = subprocess.call(sanitize(resource_id))
    file2 = subprocess.capture_output(f"/path/to/{sanitize(resource_id)}")