bandit.blacklists package

Submodules

bandit.blacklists.calls module

Blacklist various Python calls known to be dangerous

This blacklist data checks for a number of Python calls known to have possible security implications. The following blacklist tests are run against any function calls encoutered in the scanned code base, triggered by encoutering ast.Call nodes.

B301: pickle

Pickle library appears to be in use, possible security issue.

ID	Name	Calls	Severity
B301	pickle	pickle.loads pickle.load pickle.Unpickler cPickle.loads cPickle.load cPickle.Unpickler	Medium

B302: marshal

Deserialization with the marshal module is possibly dangerous.

ID	Name	Calls	Severity
B302	marshal	marshal.load marshal.loads	Medium

B303: md5

Use of insecure MD2, MD4, or MD5 hash function.

ID	Name	Calls	Severity
B303	md5	hashlib.md5 Crypto.Hash.MD2.new Crypto.Hash.MD4.new Crypto.Hash.MD5.new Cryptodome.Hash.MD2.new Cryptodome.Hash.MD4.new Cryptodome.Hash.MD5.new cryptography.hazmat.primitives .hashes.MD5	Medium

B304 - B305: ciphers and modes

Use of insecure cipher or cipher mode. Replace with a known secure cipher such as AES.

ID	Name	Calls	Severity
B304	ciphers	Crypto.Cipher.ARC2.new Crypto.Cipher.ARC4.new Crypto.Cipher.Blowfish.new Crypto.Cipher.DES.new Crypto.Cipher.XOR.new Cryptodome.Cipher.ARC2.new Cryptodome.Cipher.ARC4.new Cryptodome.Cipher.Blowfish.new Cryptodome.Cipher.DES.new Cryptodome.Cipher.XOR.new cryptography.hazmat.primitives .ciphers.algorithms.ARC4 cryptography.hazmat.primitives .ciphers.algorithms.Blowfish cryptography.hazmat.primitives .ciphers.algorithms.IDEA	High
B305	cipher_modes	cryptography.hazmat.primitives .ciphers.modes.ECB	Medium

B306: mktemp_q

Use of insecure and deprecated function (mktemp).

ID	Name	Calls	Severity
B306	mktemp_q	tempfile.mktemp	Medium

B307: eval

Use of possibly insecure function - consider using safer ast.literal_eval.

ID	Name	Calls	Severity
B307	eval	eval	Medium

B308: mark_safe

Use of mark_safe() may expose cross-site scripting vulnerabilities and should be reviewed.

ID	Name	Calls	Severity
B308	mark_safe	django.utils.safestring.mark_safe	Medium

B309: httpsconnection

Use of HTTPSConnection on older versions of Python prior to 2.7.9 and 3.4.3 do not provide security, see https://wiki.openstack.org/wiki/OSSN/OSSN-0033

ID	Name	Calls	Severity
B309	httpsconnection	httplib.HTTPSConnection http.client.HTTPSConnection six.moves.http_client .HTTPSConnection	Medium

B310: urllib_urlopen

Audit url open for permitted schemes. Allowing use of ‘file:” or custom schemes is often unexpected.

ID	Name	Calls	Severity
B310	urllib_urlopen	urllib.urlopen urllib.request.urlopen urllib.urlretrieve urllib.request.urlretrieve urllib.URLopener urllib.request.URLopener urllib.FancyURLopener urllib.request.FancyURLopener urllib2.urlopen urllib2.Request six.moves.urllib.request.urlopen six.moves.urllib.request .urlretrieve six.moves.urllib.request .URLopener six.moves.urllib.request .FancyURLopener	Medium

B311: random

Standard pseudo-random generators are not suitable for security/cryptographic purposes.

ID	Name	Calls	Severity
B311	random	random.random random.randrange random.randint random.choice random.uniform random.triangular	Low

B312: telnetlib

Telnet-related functions are being called. Telnet is considered insecure. Use SSH or some other encrypted protocol.

ID	Name	Calls	Severity
B312	telnetlib	telnetlib.*	High

B313 - B320: XML

Most of this is based off of Christian Heimes’ work on defusedxml: https://pypi.python.org/pypi/defusedxml/#defusedxml-sax

Using various XLM methods to parse untrusted XML data is known to be vulnerable to XML attacks. Methods should be replaced with their defusedxml equivalents.

ID	Name	Calls	Severity
B313	xml_bad_cElementTree	xml.etree.cElementTree.parse xml.etree.cElementTree.iterparse xml.etree.cElementTree.fromstring xml.etree.cElementTree.XMLParser	Medium
B314	xml_bad_ElementTree	xml.etree.ElementTree.parse xml.etree.ElementTree.iterparse xml.etree.ElementTree.fromstring xml.etree.ElementTree.XMLParser	Medium
B315	xml_bad_expatreader	xml.sax.expatreader.create_parser	Medium
B316	xml_bad_expatbuilder	xml.dom.expatbuilder.parse xml.dom.expatbuilder.parseString	Medium
B317	xml_bad_sax	xml.sax.parse xml.sax.parseString xml.sax.make_parser	Medium
B318	xml_bad_minidom	xml.dom.minidom.parse xml.dom.minidom.parseString	Medium
B319	xml_bad_pulldom	xml.dom.pulldom.parse xml.dom.pulldom.parseString	Medium
B320	xml_bad_etree	lxml.etree.parse lxml.etree.fromstring lxml.etree.RestrictedElement lxml.etree.GlobalParserTLS lxml.etree.getDefaultParser lxml.etree.check_docinfo	Medium

B321: ftplib

FTP-related functions are being called. FTP is considered insecure. Use SSH/SFTP/SCP or some other encrypted protocol.

ID	Name	Calls	Severity
B321	ftplib	ftplib.*	High

B322: input

The input method in Python 2 will read from standard input, evaluate and run the resulting string as python source code. This is similar, though in many ways worse, then using eval. On Python 2, use raw_input instead, input is safe in Python 3.

ID	Name	Calls	Severity
B322	input	input	High

B323: unverified_context

By default, Python will create a secure, verified ssl context for use in such classes as HTTPSConnection. However, it still allows using an insecure context via the _create_unverified_context that reverts to the previous behavior that does not validate certificates or perform hostname checks.

ID	Name	Calls	Severity
B322	unverified_context	ssl._create_unverified_context	Medium

bandit.blacklists.calls.gen_blacklist()

Generate a list of items to blacklist.

Methods of this type, “bandit.blacklist” plugins, are used to build a list of items that bandit’s built in blacklisting tests will use to trigger issues. They replace the older blacklist* test plugins and allow blacklisted items to have a unique bandit ID for filtering and profile usage.

Returns:a dictionary mapping node types to a list of blacklist data

bandit.blacklists.imports module

Blacklist various Python imports known to be dangerous

This blacklist data checks for a number of Python modules known to have possible security implications. The following blacklist tests are run against any import statements or calls encountered in the scanned code base.

Note that the XML rules listed here are mostly based off of Christian Heimes’ work on defusedxml: https://pypi.python.org/pypi/defusedxml

B401: import_telnetlib

A telnet-related module is being imported. Telnet is considered insecure. Use SSH or some other encrypted protocol.

ID	Name	Imports	Severity
B401	import_telnetlib	telnetlib	high

B402: import_ftplib

A FTP-related module is being imported. FTP is considered insecure. Use SSH/SFTP/SCP or some other encrypted protocol.

ID	Name	Imports	Severity
B402	inport_ftplib	ftplib	high

B403: import_pickle

Consider possible security implications associated with these modules.

ID	Name	Imports	Severity
B403	import_pickle	pickle cPickle	low

B404: import_subprocess

Consider possible security implications associated with these modules.

ID	Name	Imports	Severity
B404	import_subprocess	subprocess	low

B405: import_xml_etree

Using various methods to parse untrusted XML data is known to be vulnerable to XML attacks. Replace vulnerable imports with the equivalent defusedxml package, or make sure defusedxml.defuse_stdlib() is called.

ID	Name	Imports	Severity
B405	import_xml_etree	xml.etree.cElementTree xml.etree.ElementTree	low

B406: import_xml_sax

Using various methods to parse untrusted XML data is known to be vulnerable to XML attacks. Replace vulnerable imports with the equivalent defusedxml package, or make sure defusedxml.defuse_stdlib() is called.

ID	Name	Imports	Severity
B406	import_xml_sax	xml.sax	low

B407: import_xml_expat

Using various methods to parse untrusted XML data is known to be vulnerable to XML attacks. Replace vulnerable imports with the equivalent defusedxml package, or make sure defusedxml.defuse_stdlib() is called.

ID	Name	Imports	Severity
B407	import_xml_expat	xml.dom.expatbuilder	low

B408: import_xml_minidom

Using various methods to parse untrusted XML data is known to be vulnerable to XML attacks. Replace vulnerable imports with the equivalent defusedxml package, or make sure defusedxml.defuse_stdlib() is called.

ID	Name	Imports	Severity
B408	import_xml_minidom	xml.dom.minidom	low

B409: import_xml_pulldom

Using various methods to parse untrusted XML data is known to be vulnerable to XML attacks. Replace vulnerable imports with the equivalent defusedxml package, or make sure defusedxml.defuse_stdlib() is called.

ID	Name	Imports	Severity
B409	import_xml_pulldom	xml.dom.pulldom	low

B410: import_lxml

Using various methods to parse untrusted XML data is known to be vulnerable to XML attacks. Replace vulnerable imports with the equivalent defusedxml package.

ID	Name	Imports	Severity
B410	import_lxml	lxml	low

B411: import_xmlrpclib

XMLRPC is particularly dangerous as it is also concerned with communicating data over a network. Use defused.xmlrpc.monkey_patch() function to monkey-patch xmlrpclib and mitigate remote XML attacks.

ID	Name	Imports	Severity
B411	import_xmlrpclib	xmlrpclib	high

B412: import_httpoxy

httpoxy is a set of vulnerabilities that affect application code running in CGI, or CGI-like environments. The use of CGI for web applications should be avoided to prevent this class of attack. More details are available at https://httpoxy.org/.

ID	Name	Imports	Severity
B412	import_httpoxy	wsgiref.handlers.CGIHandler twisted.web.twcgi.CGIScript	high

bandit.blacklists.imports.gen_blacklist()

Generate a list of items to blacklist.

Methods of this type, “bandit.blacklist” plugins, are used to build a list of items that bandit’s built in blacklisting tests will use to trigger issues. They replace the older blacklist* test plugins and allow blacklisted items to have a unique bandit ID for filtering and profile usage.

Returns:a dictionary mapping node types to a list of blacklist data

bandit.blacklists.utils module

bandit.blacklists.utils.build_conf_dict(name, bid, qualnames, message, level=’MEDIUM’)

Build and return a blacklist configuration dict.

Module contents