1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
#!/usr/bin/env python
# Copyright (c) 2020 Orange and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
"""
Define the parent for Kubernetes testing.
"""
from __future__ import division
import ast
import json
import logging
import time
import textwrap
import yaml
from kubernetes import client
from kubernetes import config
from kubernetes import watch
import pkg_resources
import prettytable
from xtesting.core import testcase
class SecurityTesting(testcase.TestCase):
# pylint: disable=too-many-instance-attributes
"""Run Security job"""
watch_timeout = 1200
__logger = logging.getLogger(__name__)
def __init__(self, **kwargs):
super(SecurityTesting, self).__init__(**kwargs)
config.load_kube_config()
self.corev1 = client.CoreV1Api()
self.batchv1 = client.BatchV1Api()
self.pod = None
self.pod_log = ""
self.job_name = None
self.output_log_name = 'functest-kubernetes.log'
self.output_debug_log_name = 'functest-kubernetes.debug.log'
self.namespace = ""
def deploy_job(self):
"""Run Security job
It runs a single security job and then simply prints its output asis.
"""
assert self.job_name
api_response = self.corev1.create_namespace(
client.V1Namespace(metadata=client.V1ObjectMeta(
generate_name="ims-")))
self.namespace = api_response.metadata.name
self.__logger.debug("create_namespace: %s", api_response)
# pylint: disable=bad-continuation
with open(pkg_resources.resource_filename(
"functest_kubernetes",
"security/{}.yaml".format(self.job_name))) as yfile:
body = yaml.safe_load(yfile)
api_response = self.batchv1.create_namespaced_job(
body=body, namespace=self.namespace)
self.__logger.info("Job %s created", api_response.metadata.name)
self.__logger.debug("create_namespaced_job: %s", api_response)
watch_job = watch.Watch()
for event in watch_job.stream(
func=self.batchv1.list_namespaced_job,
namespace=self.namespace, timeout_seconds=self.watch_timeout):
if (event["object"].metadata.name == self.job_name and
event["object"].status.succeeded == 1):
self.__logger.info(
"%s started in %0.2f sec", event['object'].metadata.name,
time.time()-self.start_time)
watch_job.stop()
pods = self.corev1.list_namespaced_pod(
self.namespace, label_selector='job-name={}'.format(self.job_name))
self.pod = pods.items[0].metadata.name
self.pod_log = self.corev1.read_namespaced_pod_log(
name=self.pod, namespace=self.namespace)
self.__logger.info("\n\n%s", self.pod_log)
def run(self, **kwargs):
assert self.job_name
self.start_time = time.time()
try:
self.deploy_job()
except client.rest.ApiException:
self.__logger.exception("Cannot run %s", self.job_name)
self.stop_time = time.time()
def clean(self):
if self.pod:
try:
api_response = self.corev1.delete_namespaced_pod(
name=self.pod, namespace=self.namespace)
self.__logger.debug("delete_namespaced_pod: %s", api_response)
except client.rest.ApiException:
pass
if self.job_name:
try:
api_response = self.batchv1.delete_namespaced_job(
name=self.job_name, namespace=self.namespace)
self.__logger.debug(
"delete_namespaced_deployment: %s", api_response)
except client.rest.ApiException:
pass
if self.namespace:
try:
api_response = self.corev1.delete_namespace(self.namespace)
self.__logger.debug("delete_namespace: %s", self.namespace)
except client.rest.ApiException:
pass
class KubeHunter(SecurityTesting):
"""kube-hunter hunts for security weaknesses in Kubernetes clusters.
See https://github.com/aquasecurity/kube-hunter for more details
"""
__logger = logging.getLogger(__name__)
def __init__(self, **kwargs):
super(KubeHunter, self).__init__(**kwargs)
self.job_name = "kube-hunter"
def process_results(self, **kwargs):
"""Process kube-hunter details"""
self.details = json.loads(self.pod_log.splitlines()[-1])
if self.details["vulnerabilities"]:
self.result = 100
msg = prettytable.PrettyTable(
header_style='upper', padding_width=5,
field_names=['category', 'vulnerability', 'severity'])
severity = kwargs.get("severity", "high")
if severity == "low":
allowed_severity = []
elif severity == "medium":
allowed_severity = ["low"]
elif severity == "high":
allowed_severity = ["low", "medium"]
else:
self.__logger.warning(
"Selecting high as default severity (%s is incorrect)",
kwargs.get("severity", "high"))
severity = "high"
allowed_severity = ["low", "medium"]
for vulnerability in self.details["vulnerabilities"]:
if vulnerability["severity"] in allowed_severity:
self.__logger.warning(
"Skipping %s (severity is configured as %s)",
vulnerability["vulnerability"], severity)
else:
self.result = 0
msg.add_row(
[vulnerability["category"], vulnerability["vulnerability"],
vulnerability["severity"]])
self.__logger.warning("\n\n%s\n", msg.get_string())
if self.details["hunter_statistics"]:
msg = prettytable.PrettyTable(
header_style='upper', padding_width=5,
field_names=['name', 'description', 'vulnerabilities'])
for statistics in self.details["hunter_statistics"]:
msg.add_row(
[statistics["name"],
textwrap.fill(statistics["description"], width=50),
statistics["vulnerabilities"]])
self.__logger.info("\n\n%s\n", msg.get_string())
def run(self, **kwargs):
super(KubeHunter, self).run(**kwargs)
try:
self.process_results(**kwargs)
except Exception: # pylint: disable=broad-except
self.__logger.exception("Cannot process results")
self.result = 0
class KubeBench(SecurityTesting):
"""kube-bench checks whether Kubernetes is deployed securelyself.
It runs the checks documented in the CIS Kubernetes Benchmark.
See https://github.com/aquasecurity/kube-bench for more details
"""
__logger = logging.getLogger(__name__)
def __init__(self, **kwargs):
super(KubeBench, self).__init__(**kwargs)
self.job_name = "kube-bench"
def run(self, **kwargs):
super(KubeBench, self).run(**kwargs)
self.details = ast.literal_eval(self.pod_log)
msg = prettytable.PrettyTable(
header_style='upper', padding_width=5,
field_names=['node_type', 'version', 'test_desc', 'pass',
'fail', 'warn'])
for details in self.details:
for test in details['tests']:
msg.add_row(
[details['node_type'], details['version'], test['desc'],
test['pass'], test['fail'], test['warn']])
for result in test["results"]:
if result['scored'] and result['status'] == 'FAIL':
self.__logger.error(
"%s\n%s", result['test_desc'],
result['remediation'])
self.__logger.warning("Targets:\n\n%s\n", msg.get_string())
self.result = 100
|
