133 lines
4.9 KiB
Ruby
133 lines
4.9 KiB
Ruby
##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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##
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require 'msf/core'
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require 'rex/socket/range_walker'
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class Metasploit3 < 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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# Scanner mixin should be near last
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include Msf::Auxiliary::Scanner
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include Msf::Auxiliary::Report
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def initialize
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super(
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'Name' => 'Squid Proxy Port Scanner',
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'Description' => %q{
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A misconfigured Squid proxy can allow an attacker to make requests on his behalf.
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This may give the attacker information about devices that he cannot reach but the
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Squid proxy can. For example, an attacker can make requests for internal IP addresses
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against a misconfigurated open Squid proxy exposed to the Internet, therefore performing
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an internal port scan. The error messages returned by the proxy are used to determine
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if the port is open or not.
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Many Squid proxies use custom error codes so your mileage may vary. The open_proxy
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module can be used to test for open proxies, though a Squid proxy does not have to be
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open in order to allow for pivoting (e.g. an Intranet Squid proxy which allows
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the attack to pivot to another part of the network).
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},
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'Author' => ['willis'],
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'References' =>
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[
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'URL','http://wiki.squid-cache.org/SquidFaq/SecurityPitfalls'
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],
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'License' => MSF_LICENSE
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)
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register_options(
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[
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OptString.new('RANGE', [true, "IPs to scan through Squid proxy", '']),
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OptString.new('PORTS', [true, "Ports to scan; must be TCP", "21,80,139,443,445,1433,1521,1723,3389,8080,9100"]),
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OptBool.new('MANUAL_CHECK',[true,"Stop the scan if server seems to answer positively to every request",true]),
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OptString.new('CANARY_IP',[true,"The IP to check if the proxy always answers positively; the IP should not respond.","1.2.3.4"])
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], self.class)
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end
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def run_host(target_host)
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begin
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iplist = Rex::Socket::RangeWalker.new(datastore['RANGE'])
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dead = false
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portlist = Rex::Socket.portspec_crack(datastore['PORTS'])
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vprint_status("[#{rhost}] Verifying manual testing is not required...")
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manual = false
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#request a non-existent page first to make sure the server doesn't respond with a 200 to everything.
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res_test = send_request_cgi({
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'uri' => "http://{datastore['CANARY_IP']}:80",
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'method' => 'GET',
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'data' => '',
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'version' => '1.0',
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'vhost' => ''
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}, 10)
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if res_test and res_test.body and (res_test.code == 200)
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print_error("#{rhost} likely answers positively to every request, check it manually.")
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print_error("\t\t Proceeding with the scan may increase false positives.")
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manual = true
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end
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iplist.each do |target|
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next if manual and datastore['MANUAL_CHECK']
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portlist.each do |port|
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next if dead
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vprint_status("[#{rhost}] Requesting #{target}:#{port}")
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if port==443
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res = send_request_cgi({
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'uri' => "https://#{target}:#{port}",
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'method' => 'GET',
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'data' => '',
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'version' => '1.0',
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'vhost' => ''
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}, 10)
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else
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res = send_request_cgi({
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'uri' => "http://#{target}:#{port}",
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'method' => 'GET',
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'data' => '',
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'version' => '1.0',
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'vhost' => ''
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}, 10)
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end
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if res and res.body
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if res.code == 200 or res.body =~ /Zero/ or res.code == 404 or res.code == 401
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print_good("[#{rhost}] #{target}:#{port} seems OPEN")
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report_service(:host => target, :port => port, :name => "unknown", :info => res.body )
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end
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if res.body =~ /No route to host/
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dead = true
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print_error("[#{rhost}] #{target} is DEAD")
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end
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print_status("[#{rhost}] #{target}:#{port} blocked by ACL") if res.body =~ /Access control/
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if res.body =~ /Connection refused/ or res.body =~ /service not listening/
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report_host(:host => target)
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print_good("[#{rhost}] #{target} is alive but #{port} is CLOSED")
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end
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end
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end
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dead = false
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end
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rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
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rescue ::Timeout::Error, ::Errno::EPIPE
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end
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end
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end
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