bcoles
93 lines
2.1 KiB
Ruby
93 lines
2.1 KiB
Ruby
##
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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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require 'English'
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class MetasploitModule < Msf::Auxiliary
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include Msf::Exploit::Remote::Tcp
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include Msf::Auxiliary::Fuzzer
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def initialize(info = {})
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super(
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update_info(
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info,
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'Name' => 'SSH 2.0 Version Fuzzer',
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'Description' => %q{
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This module sends a series of SSH requests with malicious version strings.
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},
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'Author' => [ 'hdm' ],
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'License' => MSF_LICENSE,
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'Notes' => {
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'Stability' => [CRASH_SERVICE_DOWN],
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'SideEffects' => [],
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'Reliability' => []
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}
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)
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)
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register_options([
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Opt::RPORT(22)
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])
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end
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def do_ssh_version(pkt, opts = {})
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@connected = false
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connect
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@connected = true
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@banner = sock.get_once(-1, opts[:banner_timeout])
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return if !@banner
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sock.put("#{pkt}\r\n")
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end
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def run
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last_str = nil
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last_inp = nil
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last_err = nil
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make_ssh_version_base
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cnt = 0
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fuzz_strings do |str|
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cnt += 1
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if (cnt % 100 == 0)
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print_status("Fuzzing with iteration #{cnt} using #{@last_fuzzer_input}")
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end
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begin
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do_ssh_version(str, banner_timeout: 5)
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rescue ::Interrupt
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print_status("Exiting on interrupt: iteration #{cnt} using #{@last_fuzzer_input}")
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raise $ERROR_INFO
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rescue StandardError => e
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last_err = e
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ensure
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disconnect
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end
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if !@connected
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if last_str
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print_status("The service may have crashed: iteration:#{cnt - 1} method=#{last_inp} string=#{last_str.unpack('H*')[0]} error=#{last_err}")
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else
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print_status("Could not connect to the service: #{last_err}")
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end
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return
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end
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if !@banner
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print_status("The service may have crashed (no banner): iteration:#{cnt - 1} method=#{last_inp} string=#{last_str.unpack('H*')[0]} ")
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return
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end
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last_str = str
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last_inp = @last_fuzzer_input
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end
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end
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def make_ssh_version_base
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'SSH-2.0-'
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end
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end
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