1 files changed, 52 insertions, 0 deletions
diff --git a/charms/trusty/ceilometer/charmhelpers/contrib/hardening/host/checks/minimize_access.py b/charms/trusty/ceilometer/charmhelpers/contrib/hardening/host/checks/minimize_access.py
new file mode 100644
index 0000000..c471064
--- /dev/null
+++ b/charms/trusty/ceilometer/charmhelpers/contrib/hardening/host/checks/minimize_access.py
@@ -0,0 +1,52 @@
+# Copyright 2016 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
+from charmhelpers.contrib.hardening.audits.file import (
+    FilePermissionAudit,
+    ReadOnly,
+)
+from charmhelpers.contrib.hardening import utils
+
+
+def get_audits():
+    """Get OS hardening access audits.
+
+    :returns:  dictionary of audits
+    """
+    audits = []
+    settings = utils.get_settings('os')
+
+    # Remove write permissions from $PATH folders for all regular users.
+    # This prevents changing system-wide commands from normal users.
+    path_folders = {'/usr/local/sbin',
+                    '/usr/local/bin',
+                    '/usr/sbin',
+                    '/usr/bin',
+                    '/bin'}
+    extra_user_paths = settings['environment']['extra_user_paths']
+    path_folders.update(extra_user_paths)
+    audits.append(ReadOnly(path_folders))
+
+    # Only allow the root user to have access to the shadow file.
+    audits.append(FilePermissionAudit('/etc/shadow', 'root', 'root', 0o0600))
+
+    if 'change_user' not in settings['security']['users_allow']:
+        # su should only be accessible to user and group root, unless it is
+        # expressly defined to allow users to change to root via the
+        # security_users_allow config option.
+        audits.append(FilePermissionAudit('/bin/su', 'root', 'root', 0o750))
+
+    return audits