95 lines
2.8 KiB
Ruby
95 lines
2.8 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class MetasploitModule < Msf::Auxiliary
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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(info,
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'Name' => 'Ruby on Rails XML Processor YAML Deserialization Scanner',
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'Description' => %q{
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This module attempts to identify Ruby on Rails instances vulnerable to
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an arbitrary object instantiation flaw in the XML request processor.
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},
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'Author' => [
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'hdm', # author
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'jjarmoc' # improvements
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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['CVE', '2013-0156'],
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['URL', 'https://community.rapid7.com/community/metasploit/blog/2013/01/09/serialization-mischief-in-ruby-land-cve-2013-0156']
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]
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))
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register_options([
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OptString.new('URIPATH', [true, "The URI to test", "/"]),
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OptEnum.new('HTTP_METHOD', [true, 'HTTP Method', 'POST', ['GET', 'POST', 'PUT'] ]),
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], self.class)
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end
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def send_probe(ptype, pdata)
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odata = %Q^<?xml version="1.0" encoding="UTF-8"?>\n<probe type="#{ptype}"><![CDATA[\n#{pdata}\n]]></probe>^
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res = send_request_cgi({
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'uri' => datastore['URIPATH'] || "/",
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'method' => datastore['HTTP_METHOD'],
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'ctype' => 'application/xml',
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'data' => odata
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}, 25)
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end
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def run_host(ip)
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res1 = send_probe("string", "hello")
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unless res1
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vprint_status("#{rhost}:#{rport} No reply to the initial XML request")
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return
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end
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if res1.code.to_s =~ /^[5]/
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vprint_status("#{rhost}:#{rport} The server replied with #{res1.code} for our initial XML request, double check URIPATH")
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return
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end
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res2 = send_probe("yaml", "--- !ruby/object:Time {}\n")
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unless res2
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vprint_status("#{rhost}:#{rport} No reply to the initial YAML probe")
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return
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end
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res3 = send_probe("yaml", "--- !ruby/object:\x00")
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unless res3
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vprint_status("#{rhost}:#{rport} No reply to the second YAML probe")
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return
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end
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vprint_status("Probe response codes: #{res1.code} / #{res2.code} / #{res3.code}")
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if (res2.code == res1.code) and (res3.code != res2.code) and (res3.code != 200)
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print_good("#{rhost}:#{rport} is likely vulnerable due to a #{res3.code} reply for invalid YAML")
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report_vuln({
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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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:info => "Module triggered a #{res3.code} reply",
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:refs => self.references
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})
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else
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vprint_status("#{rhost}:#{rport} is not likely to be vulnerable or URIPATH & HTTP_METHOD must be set")
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end
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end
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end
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