51 lines
1.8 KiB
Python
51 lines
1.8 KiB
Python
# Copyright 2016 Canonical Limited.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from charmhelpers.contrib.hardening.audits.file import (
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FilePermissionAudit,
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ReadOnly,
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)
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from charmhelpers.contrib.hardening import utils
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def get_audits():
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"""Get OS hardening access audits.
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:returns: dictionary of audits
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"""
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audits = []
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settings = utils.get_settings('os')
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# Remove write permissions from $PATH folders for all regular users.
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# This prevents changing system-wide commands from normal users.
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path_folders = {'/usr/local/sbin',
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'/usr/local/bin',
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'/usr/sbin',
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'/usr/bin',
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'/bin'}
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extra_user_paths = settings['environment']['extra_user_paths']
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path_folders.update(extra_user_paths)
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audits.append(ReadOnly(path_folders))
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# Only allow the root user to have access to the shadow file.
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audits.append(FilePermissionAudit('/etc/shadow', 'root', 'root', 0o0600))
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if 'change_user' not in settings['security']['users_allow']:
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# su should only be accessible to user and group root, unless it is
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# expressly defined to allow users to change to root via the
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# security_users_allow config option.
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audits.append(FilePermissionAudit('/bin/su', 'root', 'root', 0o750))
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return audits
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