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75 lines
2.6 KiB
Python
75 lines
2.6 KiB
Python
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# -*- coding:utf-8 -*-
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#
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# Copyright 2014 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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B601: Test for shell injection within Paramiko
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==============================================
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Paramiko is a Python library designed to work with the SSH2 protocol for secure
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(encrypted and authenticated) connections to remote machines. It is intended to
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run commands on a remote host. These commands are run within a shell on the
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target and are thus vulnerable to various shell injection attacks. Bandit
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reports a MEDIUM issue when it detects the use of Paramiko's "exec_command" or
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"invoke_shell" methods advising the user to check inputs are correctly
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sanitized.
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:Example:
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.. code-block:: none
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>> Issue: Possible shell injection via Paramiko call, check inputs are
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properly sanitized.
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Severity: Medium Confidence: Medium
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Location: ./examples/paramiko_injection.py:4
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3 # this is not safe
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4 paramiko.exec_command('something; reallly; unsafe')
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5
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>> Issue: Possible shell injection via Paramiko call, check inputs are
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properly sanitized.
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Severity: Medium Confidence: Medium
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Location: ./examples/paramiko_injection.py:10
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9 # this is not safe
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10 SSHClient.invoke_shell('something; bad; here\n')
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11
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.. seealso::
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- https://security.openstack.org
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- https://github.com/paramiko/paramiko
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- https://www.owasp.org/index.php/Command_Injection
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.. versionadded:: 0.12.0
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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.checks('Call')
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@test.test_id('B601')
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def paramiko_calls(context):
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issue_text = ('Possible shell injection via Paramiko call, check inputs '
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'are properly sanitized.')
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for module in ['paramiko']:
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if context.is_module_imported_like(module):
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if context.call_function_name in ['exec_command', 'invoke_shell']:
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return bandit.Issue(severity=bandit.MEDIUM,
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confidence=bandit.MEDIUM,
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text=issue_text)
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