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70 lines
2.5 KiB
Python
70 lines
2.5 KiB
Python
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# -*- coding:utf-8 -*-
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#
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# Copyright 2015 Hewlett-Packard Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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r"""
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======================================================
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B201: Test for use of flask app with debug set to true
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======================================================
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Running Flask applications in debug mode results in the Werkzeug debugger
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being enabled. This includes a feature that allows arbitrary code execution.
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Documentation for both Flask [1]_ and Werkzeug [2]_ strongly suggests that
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debug mode should never be enabled on production systems.
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Operating a production server with debug mode enabled was the probable cause
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of the Patreon breach in 2015 [3]_.
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:Example:
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.. code-block:: none
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>> Issue: A Flask app appears to be run with debug=True, which exposes
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the Werkzeug debugger and allows the execution of arbitrary code.
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Severity: High Confidence: High
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Location: examples/flask_debug.py:10
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9 #bad
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10 app.run(debug=True)
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11
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.. seealso::
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.. [1] http://flask.pocoo.org/docs/0.10/quickstart/#debug-mode
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.. [2] http://werkzeug.pocoo.org/docs/0.10/debug/
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.. [3] http://labs.detectify.com/post/130332638391/how-patreon-got-hacked-publicly-exposed-werkzeug # noqa
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.. versionadded:: 0.15.0
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"""
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import bandit
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from bandit.core import test_properties as test
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@test.test_id('B201')
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@test.checks('Call')
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def flask_debug_true(context):
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if context.is_module_imported_like('flask'):
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if context.call_function_name_qual.endswith('.run'):
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if context.check_call_arg_value('debug', 'True'):
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return bandit.Issue(
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severity=bandit.HIGH,
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confidence=bandit.MEDIUM,
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text="A Flask app appears to be run with debug=True, "
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"which exposes the Werkzeug debugger and allows "
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"the execution of arbitrary code.",
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lineno=context.get_lineno_for_call_arg('debug'),
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)
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