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476 lines
16 KiB
Plaintext
Metadata-Version: 2.1
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Name: bandit
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Version: 1.5.1
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Summary: Security oriented static analyser for python code.
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Home-page: https://bandit.readthedocs.io/en/latest/
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Author: PyCQA
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Author-email: code-quality@python.org
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License: UNKNOWN
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Platform: UNKNOWN
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Classifier: Development Status :: 5 - Production/Stable
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Classifier: Environment :: Console
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Classifier: Intended Audience :: Information Technology
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Classifier: Intended Audience :: System Administrators
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Classifier: Intended Audience :: Developers
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Classifier: License :: OSI Approved :: Apache Software License
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Classifier: Operating System :: POSIX :: Linux
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Classifier: Operating System :: MacOS :: MacOS X
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Classifier: Programming Language :: Python
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Classifier: Programming Language :: Python :: 2
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Classifier: Programming Language :: Python :: 2.7
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Classifier: Programming Language :: Python :: 3
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Classifier: Programming Language :: Python :: 3.5
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Classifier: Programming Language :: Python :: 3.6
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Classifier: Programming Language :: Python :: 3.7
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Classifier: Topic :: Security
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Requires-Dist: GitPython (>=1.0.1)
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Requires-Dist: PyYAML (>=3.12)
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Requires-Dist: six (>=1.10.0)
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Requires-Dist: stevedore (>=1.20.0)
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.. image:: https://github.com/PyCQA/bandit/blob/master/logo/logotype-sm.png
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:alt: Bandit
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======
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.. image:: https://travis-ci.org/PyCQA/bandit.svg?branch=master
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:target: https://travis-ci.org/PyCQA/bandit/
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:alt: Build Status
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.. image:: https://img.shields.io/pypi/v/bandit.svg
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:target: https://pypi.org/project/bandit/
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:alt: Latest Version
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.. image:: https://img.shields.io/pypi/pyversions/bandit.svg
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:target: https://pypi.org/project/bandit/
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:alt: Python Versions
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.. image:: https://img.shields.io/pypi/format/bandit.svg
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:target: https://pypi.org/project/bandit/
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:alt: Format
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.. image:: https://img.shields.io/badge/license-Apache%202-blue.svg
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:target: https://github.com/PyCQA/bandit/blob/master/LICENSE
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:alt: License
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A security linter from PyCQA
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* Free software: Apache license
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* Documentation: https://bandit.readthedocs.io/en/latest/
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* Source: https://github.com/PyCQA/bandit
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* Bugs: https://github.com/PyCQA/bandit/issues
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Overview
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--------
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Bandit is a tool designed to find common security issues in Python code. To do
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this Bandit processes each file, builds an AST from it, and runs appropriate
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plugins against the AST nodes. Once Bandit has finished scanning all the files
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it generates a report.
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Bandit was originally developed within the OpenStack Security Project and
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later rehomed to PyCQA.
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Installation
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------------
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Bandit is distributed on PyPI. The best way to install it is with pip:
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Create a virtual environment (optional)::
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virtualenv bandit-env
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Install Bandit::
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pip install bandit
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# Or if you're working with a Python 3 project
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pip3 install bandit
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Run Bandit::
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bandit -r path/to/your/code
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Bandit can also be installed from source. To do so, download the source tarball
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from PyPI, then install it::
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python setup.py install
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Usage
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-----
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Example usage across a code tree::
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bandit -r ~/your_repos/project
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Example usage across the ``examples/`` directory, showing three lines of
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context and only reporting on the high-severity issues::
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bandit examples/*.py -n 3 -lll
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Bandit can be run with profiles. To run Bandit against the examples directory
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using only the plugins listed in the ``ShellInjection`` profile::
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bandit examples/*.py -p ShellInjection
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Bandit also supports passing lines of code to scan using standard input. To
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run Bandit with standard input::
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cat examples/imports.py | bandit -
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Usage::
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$ bandit -h
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usage: bandit [-h] [-r] [-a {file,vuln}] [-n CONTEXT_LINES] [-c CONFIG_FILE]
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[-p PROFILE] [-t TESTS] [-s SKIPS] [-l] [-i]
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[-f {csv,custom,html,json,screen,txt,xml,yaml}]
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[--msg-template MSG_TEMPLATE] [-o [OUTPUT_FILE]] [-v] [-d]
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[--ignore-nosec] [-x EXCLUDED_PATHS] [-b BASELINE]
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[--ini INI_PATH] [--version]
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[targets [targets ...]]
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Bandit - a Python source code security analyzer
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positional arguments:
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targets source file(s) or directory(s) to be tested
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optional arguments:
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-h, --help show this help message and exit
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-r, --recursive find and process files in subdirectories
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-a {file,vuln}, --aggregate {file,vuln}
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aggregate output by vulnerability (default) or by
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filename
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-n CONTEXT_LINES, --number CONTEXT_LINES
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maximum number of code lines to output for each issue
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-c CONFIG_FILE, --configfile CONFIG_FILE
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optional config file to use for selecting plugins and
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overriding defaults
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-p PROFILE, --profile PROFILE
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profile to use (defaults to executing all tests)
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-t TESTS, --tests TESTS
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comma-separated list of test IDs to run
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-s SKIPS, --skip SKIPS
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comma-separated list of test IDs to skip
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-l, --level report only issues of a given severity level or higher
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(-l for LOW, -ll for MEDIUM, -lll for HIGH)
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-i, --confidence report only issues of a given confidence level or
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higher (-i for LOW, -ii for MEDIUM, -iii for HIGH)
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-f {csv,custom,html,json,screen,txt,xml,yaml}, --format {csv,custom,html,json,screen,txt,xml,yaml}
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specify output format
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--msg-template MSG_TEMPLATE
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specify output message template (only usable with
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--format custom), see CUSTOM FORMAT section for list
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of available values
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-o [OUTPUT_FILE], --output [OUTPUT_FILE]
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write report to filename
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-v, --verbose output extra information like excluded and included
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files
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-d, --debug turn on debug mode
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--ignore-nosec do not skip lines with # nosec comments
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-x EXCLUDED_PATHS, --exclude EXCLUDED_PATHS
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comma-separated list of paths to exclude from scan
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(note that these are in addition to the excluded paths
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provided in the config file)
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-b BASELINE, --baseline BASELINE
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path of a baseline report to compare against (only
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JSON-formatted files are accepted)
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--ini INI_PATH path to a .bandit file that supplies command line
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arguments
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--version show program's version number and exit
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CUSTOM FORMATTING
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-----------------
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Available tags:
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{abspath}, {relpath}, {line}, {test_id},
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{severity}, {msg}, {confidence}, {range}
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Example usage:
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Default template:
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bandit -r examples/ --format custom --msg-template \
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"{abspath}:{line}: {test_id}[bandit]: {severity}: {msg}"
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Provides same output as:
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bandit -r examples/ --format custom
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Tags can also be formatted in python string.format() style:
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bandit -r examples/ --format custom --msg-template \
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"{relpath:20.20s}: {line:03}: {test_id:^8}: DEFECT: {msg:>20}"
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See python documentation for more information about formatting style:
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https://docs.python.org/3.4/library/string.html
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The following tests were discovered and loaded:
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-----------------------------------------------
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B101 assert_used
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B102 exec_used
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B103 set_bad_file_permissions
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B104 hardcoded_bind_all_interfaces
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B105 hardcoded_password_string
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B106 hardcoded_password_funcarg
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B107 hardcoded_password_default
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B108 hardcoded_tmp_directory
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B110 try_except_pass
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B112 try_except_continue
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B201 flask_debug_true
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B301 pickle
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B302 marshal
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B303 md5
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B304 ciphers
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B305 cipher_modes
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B306 mktemp_q
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B307 eval
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B308 mark_safe
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B309 httpsconnection
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B310 urllib_urlopen
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B311 random
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B312 telnetlib
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B313 xml_bad_cElementTree
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B314 xml_bad_ElementTree
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B315 xml_bad_expatreader
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B316 xml_bad_expatbuilder
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B317 xml_bad_sax
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B318 xml_bad_minidom
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B319 xml_bad_pulldom
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B320 xml_bad_etree
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B321 ftplib
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B322 input
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B323 unverified_context
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B324 hashlib_new_insecure_functions
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B325 tempnam
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B401 import_telnetlib
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B402 import_ftplib
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B403 import_pickle
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B404 import_subprocess
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B405 import_xml_etree
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B406 import_xml_sax
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B407 import_xml_expat
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B408 import_xml_minidom
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B409 import_xml_pulldom
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B410 import_lxml
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B411 import_xmlrpclib
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B412 import_httpoxy
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B413 import_pycrypto
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B414 import_pycryptodome
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B501 request_with_no_cert_validation
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B502 ssl_with_bad_version
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B503 ssl_with_bad_defaults
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B504 ssl_with_no_version
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B505 weak_cryptographic_key
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B506 yaml_load
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B507 ssh_no_host_key_verification
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B601 paramiko_calls
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B602 subprocess_popen_with_shell_equals_true
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B603 subprocess_without_shell_equals_true
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B604 any_other_function_with_shell_equals_true
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B605 start_process_with_a_shell
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B606 start_process_with_no_shell
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B607 start_process_with_partial_path
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B608 hardcoded_sql_expressions
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B609 linux_commands_wildcard_injection
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B610 django_extra_used
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B611 django_rawsql_used
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B701 jinja2_autoescape_false
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B702 use_of_mako_templates
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B703 django_mark_safe
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Configuration
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-------------
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An optional config file may be supplied and may include:
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- lists of tests which should or shouldn't be run
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- exclude_dirs - sections of the path, that if matched, will be excluded from
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scanning
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- overridden plugin settings - may provide different settings for some
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plugins
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Per Project Command Line Args
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-----------------------------
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Projects may include a `.bandit` file that specifies command line arguments
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that should be supplied for that project. The currently supported arguments
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are:
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- targets: comma separated list of target dirs/files to run bandit on
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- exclude: comma separated list of excluded paths
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- skips: comma separated list of tests to skip
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- tests: comma separated list of tests to run
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To use this, put a .bandit file in your project's directory. For example:
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::
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[bandit]
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exclude: /test
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::
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[bandit]
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tests: B101,B102,B301
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Exclusions
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----------
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In the event that a line of code triggers a Bandit issue, but that the line
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has been reviewed and the issue is a false positive or acceptable for some
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other reason, the line can be marked with a ``# nosec`` and any results
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associated with it will not be reported.
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For example, although this line may cause Bandit to report a potential
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security issue, it will not be reported::
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self.process = subprocess.Popen('/bin/echo', shell=True) # nosec
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Vulnerability Tests
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-------------------
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Vulnerability tests or "plugins" are defined in files in the plugins directory.
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Tests are written in Python and are autodiscovered from the plugins directory.
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Each test can examine one or more type of Python statements. Tests are marked
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with the types of Python statements they examine (for example: function call,
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string, import, etc).
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Tests are executed by the ``BanditNodeVisitor`` object as it visits each node
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in the AST.
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Test results are maintained in the ``BanditResultStore`` and aggregated for
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output at the completion of a test run.
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Writing Tests
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-------------
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To write a test:
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- Identify a vulnerability to build a test for, and create a new file in
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examples/ that contains one or more cases of that vulnerability.
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- Consider the vulnerability you're testing for, mark the function with one
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or more of the appropriate decorators:
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- @checks('Call')
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- @checks('Import', 'ImportFrom')
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- @checks('Str')
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- Create a new Python source file to contain your test, you can reference
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existing tests for examples.
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- The function that you create should take a parameter "context" which is
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an instance of the context class you can query for information about the
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current element being examined. You can also get the raw AST node for
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more advanced use cases. Please see the context.py file for more.
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- Extend your Bandit configuration file as needed to support your new test.
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- Execute Bandit against the test file you defined in examples/ and ensure
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that it detects the vulnerability. Consider variations on how this
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vulnerability might present itself and extend the example file and the test
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function accordingly.
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Extending Bandit
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----------------
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Bandit allows users to write and register extensions for checks and formatters.
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Bandit will load plugins from two entry-points:
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- `bandit.formatters`
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- `bandit.plugins`
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Formatters need to accept 4 things:
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- `result_store`: An instance of `bandit.core.BanditResultStore`
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- `file_list`: The list of files which were inspected in the scope
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- `scores`: The scores awarded to each file in the scope
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- `excluded_files`: The list of files that were excluded from the scope
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Plugins tend to take advantage of the `bandit.checks` decorator which allows
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the author to register a check for a particular type of AST node. For example
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::
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@bandit.checks('Call')
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def prohibit_unsafe_deserialization(context):
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if 'unsafe_load' in context.call_function_name_qual:
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return bandit.Issue(
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severity=bandit.HIGH,
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confidence=bandit.HIGH,
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text="Unsafe deserialization detected."
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)
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To register your plugin, you have two options:
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1. If you're using setuptools directly, add something like the following to
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your ``setup`` call::
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# If you have an imaginary bson formatter in the bandit_bson module
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# and a function called `formatter`.
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entry_points={'bandit.formatters': ['bson = bandit_bson:formatter']}
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# Or a check for using mako templates in bandit_mako that
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entry_points={'bandit.plugins': ['mako = bandit_mako']}
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2. If you're using pbr, add something like the following to your `setup.cfg`
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file::
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[entry_points]
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bandit.formatters =
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bson = bandit_bson:formatter
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bandit.plugins =
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mako = bandit_mako
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Contributing
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------------
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Contributions to Bandit are always welcome!
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The best way to get started with Bandit is to grab the source::
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git clone https://github.com/PyCQA/bandit.git
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You can test any changes with tox::
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pip install tox
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tox -e pep8
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tox -e py27
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tox -e py35
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tox -e docs
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tox -e cover
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Please make PR requests using your own branch, and not master::
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git checkout -b mychange
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git push origin mychange
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Reporting Bugs
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--------------
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Bugs should be reported on github. To file a bug against Bandit, visit:
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https://github.com/PyCQA/bandit/issues
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Under Which Version of Python Should I Install Bandit?
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------------------------------------------------------
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The answer to this question depends on the project(s) you will be running
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Bandit against. If your project is only compatible with Python 2.7, you
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should install Bandit to run under Python 2.7. If your project is only
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compatible with Python 3.5, then use 3.5 respectively. If your project supports
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both, you *could* run Bandit with both versions but you don't have to.
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Bandit uses the `ast` module from Python's standard library in order to
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analyze your Python code. The `ast` module is only able to parse Python code
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that is valid in the version of the interpreter from which it is imported. In
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other words, if you try to use Python 2.7's `ast` module to parse code written
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for 3.5 that uses, for example, `yield from` with asyncio, then you'll have
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syntax errors that will prevent Bandit from working properly. Alternatively,
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if you are relying on 2.7's octal notation of `0777` then you'll have a syntax
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error if you run Bandit on 3.x.
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References
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==========
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Bandit docs: https://bandit.readthedocs.io/en/latest/
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Python AST module documentation: https://docs.python.org/2/library/ast.html
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Green Tree Snakes - the missing Python AST docs:
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https://greentreesnakes.readthedocs.org/en/latest/
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Documentation of the various types of AST nodes that Bandit currently covers
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or could be extended to cover:
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https://greentreesnakes.readthedocs.org/en/latest/nodes.html
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