diff options
Diffstat (limited to 'charms/trusty/ceilometer/charmhelpers/contrib/hardening/host/checks/sysctl.py')
| -rw-r--r-- | charms/trusty/ceilometer/charmhelpers/contrib/hardening/host/checks/sysctl.py | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/charms/trusty/ceilometer/charmhelpers/contrib/hardening/host/checks/sysctl.py b/charms/trusty/ceilometer/charmhelpers/contrib/hardening/host/checks/sysctl.py deleted file mode 100644 index 4a76d74..0000000 --- a/charms/trusty/ceilometer/charmhelpers/contrib/hardening/host/checks/sysctl.py +++ /dev/null @@ -1,211 +0,0 @@ -# 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/>. - -import os -import platform -import re -import six -import subprocess - -from charmhelpers.core.hookenv import ( - log, - INFO, - WARNING, -) -from charmhelpers.contrib.hardening import utils -from charmhelpers.contrib.hardening.audits.file import ( - FilePermissionAudit, - TemplatedFile, -) -from charmhelpers.contrib.hardening.host import TEMPLATES_DIR - - -SYSCTL_DEFAULTS = """net.ipv4.ip_forward=%(net_ipv4_ip_forward)s -net.ipv6.conf.all.forwarding=%(net_ipv6_conf_all_forwarding)s -net.ipv4.conf.all.rp_filter=1 -net.ipv4.conf.default.rp_filter=1 -net.ipv4.icmp_echo_ignore_broadcasts=1 -net.ipv4.icmp_ignore_bogus_error_responses=1 -net.ipv4.icmp_ratelimit=100 -net.ipv4.icmp_ratemask=88089 -net.ipv6.conf.all.disable_ipv6=%(net_ipv6_conf_all_disable_ipv6)s -net.ipv4.tcp_timestamps=%(net_ipv4_tcp_timestamps)s -net.ipv4.conf.all.arp_ignore=%(net_ipv4_conf_all_arp_ignore)s -net.ipv4.conf.all.arp_announce=%(net_ipv4_conf_all_arp_announce)s -net.ipv4.tcp_rfc1337=1 -net.ipv4.tcp_syncookies=1 -net.ipv4.conf.all.shared_media=1 -net.ipv4.conf.default.shared_media=1 -net.ipv4.conf.all.accept_source_route=0 -net.ipv4.conf.default.accept_source_route=0 -net.ipv4.conf.all.accept_redirects=0 -net.ipv4.conf.default.accept_redirects=0 -net.ipv6.conf.all.accept_redirects=0 -net.ipv6.conf.default.accept_redirects=0 -net.ipv4.conf.all.secure_redirects=0 -net.ipv4.conf.default.secure_redirects=0 -net.ipv4.conf.all.send_redirects=0 -net.ipv4.conf.default.send_redirects=0 -net.ipv4.conf.all.log_martians=0 -net.ipv6.conf.default.router_solicitations=0 -net.ipv6.conf.default.accept_ra_rtr_pref=0 -net.ipv6.conf.default.accept_ra_pinfo=0 -net.ipv6.conf.default.accept_ra_defrtr=0 -net.ipv6.conf.default.autoconf=0 -net.ipv6.conf.default.dad_transmits=0 -net.ipv6.conf.default.max_addresses=1 -net.ipv6.conf.all.accept_ra=0 -net.ipv6.conf.default.accept_ra=0 -kernel.modules_disabled=%(kernel_modules_disabled)s -kernel.sysrq=%(kernel_sysrq)s -fs.suid_dumpable=%(fs_suid_dumpable)s -kernel.randomize_va_space=2 -""" - - -def get_audits(): - """Get OS hardening sysctl audits. - - :returns: dictionary of audits - """ - audits = [] - settings = utils.get_settings('os') - - # Apply the sysctl settings which are configured to be applied. - audits.append(SysctlConf()) - # Make sure that only root has access to the sysctl.conf file, and - # that it is read-only. - audits.append(FilePermissionAudit('/etc/sysctl.conf', - user='root', - group='root', mode=0o0440)) - # If module loading is not enabled, then ensure that the modules - # file has the appropriate permissions and rebuild the initramfs - if not settings['security']['kernel_enable_module_loading']: - audits.append(ModulesTemplate()) - - return audits - - -class ModulesContext(object): - - def __call__(self): - settings = utils.get_settings('os') - with open('/proc/cpuinfo', 'r') as fd: - cpuinfo = fd.readlines() - - for line in cpuinfo: - match = re.search(r"^vendor_id\s+:\s+(.+)", line) - if match: - vendor = match.group(1) - - if vendor == "GenuineIntel": - vendor = "intel" - elif vendor == "AuthenticAMD": - vendor = "amd" - - ctxt = {'arch': platform.processor(), - 'cpuVendor': vendor, - 'desktop_enable': settings['general']['desktop_enable']} - - return ctxt - - -class ModulesTemplate(object): - - def __init__(self): - super(ModulesTemplate, self).__init__('/etc/initramfs-tools/modules', - ModulesContext(), - templates_dir=TEMPLATES_DIR, - user='root', group='root', - mode=0o0440) - - def post_write(self): - subprocess.check_call(['update-initramfs', '-u']) - - -class SysCtlHardeningContext(object): - def __call__(self): - settings = utils.get_settings('os') - ctxt = {'sysctl': {}} - - log("Applying sysctl settings", level=INFO) - extras = {'net_ipv4_ip_forward': 0, - 'net_ipv6_conf_all_forwarding': 0, - 'net_ipv6_conf_all_disable_ipv6': 1, - 'net_ipv4_tcp_timestamps': 0, - 'net_ipv4_conf_all_arp_ignore': 0, - 'net_ipv4_conf_all_arp_announce': 0, - 'kernel_sysrq': 0, - 'fs_suid_dumpable': 0, - 'kernel_modules_disabled': 1} - - if settings['sysctl']['ipv6_enable']: - extras['net_ipv6_conf_all_disable_ipv6'] = 0 - - if settings['sysctl']['forwarding']: - extras['net_ipv4_ip_forward'] = 1 - extras['net_ipv6_conf_all_forwarding'] = 1 - - if settings['sysctl']['arp_restricted']: - extras['net_ipv4_conf_all_arp_ignore'] = 1 - extras['net_ipv4_conf_all_arp_announce'] = 2 - - if settings['security']['kernel_enable_module_loading']: - extras['kernel_modules_disabled'] = 0 - - if settings['sysctl']['kernel_enable_sysrq']: - sysrq_val = settings['sysctl']['kernel_secure_sysrq'] - extras['kernel_sysrq'] = sysrq_val - - if settings['security']['kernel_enable_core_dump']: - extras['fs_suid_dumpable'] = 1 - - settings.update(extras) - for d in (SYSCTL_DEFAULTS % settings).split(): - d = d.strip().partition('=') - key = d[0].strip() - path = os.path.join('/proc/sys', key.replace('.', '/')) - if not os.path.exists(path): - log("Skipping '%s' since '%s' does not exist" % (key, path), - level=WARNING) - continue - - ctxt['sysctl'][key] = d[2] or None - - # Translate for python3 - return {'sysctl_settings': - [(k, v) for k, v in six.iteritems(ctxt['sysctl'])]} - - -class SysctlConf(TemplatedFile): - """An audit check for sysctl settings.""" - def __init__(self): - self.conffile = '/etc/sysctl.d/99-juju-hardening.conf' - super(SysctlConf, self).__init__(self.conffile, - SysCtlHardeningContext(), - template_dir=TEMPLATES_DIR, - user='root', group='root', - mode=0o0440) - - def post_write(self): - try: - subprocess.check_call(['sysctl', '-p', self.conffile]) - except subprocess.CalledProcessError as e: - # NOTE: on some systems if sysctl cannot apply all settings it - # will return non-zero as well. - log("sysctl command returned an error (maybe some " - "keys could not be set) - %s" % (e), - level=WARNING) |